o3de/Code/Framework/AzCore/Tests/AZStd/String.cpp

/*
 * Copyright (c) Contributors to the Open 3D Engine Project.
 * For complete copyright and license terms please see the LICENSE at the root of this distribution.
 *
 * SPDX-License-Identifier: Apache-2.0 OR MIT
 *
 */
#include "UserTypes.h"

#include <AzCore/std/string/string.h>
#include <AzCore/std/string/conversions.h>
#include <AzCore/std/string/tokenize.h>
#include <AzCore/std/string/alphanum.h>
#include <AzCore/std/sort.h>
#include <AzCore/std/allocator_stateless.h>
#include <AzCore/std/containers/map.h>
#include <AzCore/std/containers/set.h>
#include <AzCore/std/containers/array.h>
#include <AzCore/std/containers/span.h>
#include <AzCore/std/ranges/join_view.h>
#include <AzCore/std/ranges/transform_view.h>
#include <AzCore/std/string/regex.h>
#include <AzCore/std/string/wildcard.h>
#include <AzCore/std/string/fixed_string.h>
#include <AzCore/std/typetraits/is_convertible.h>

// we need this for AZ_TEST_FLOAT compare
#include <cinttypes>
#include <string>
#include <string_view>

// Because of the SSO (small string optimization) we always shoule have capacity != 0 and data != 0
#define AZ_TEST_VALIDATE_EMPTY_STRING(_String)        \
    EXPECT_TRUE(_String.validate());               \
    EXPECT_EQ(0, _String.size());              \
    EXPECT_TRUE(_String.empty());                  \
    EXPECT_TRUE(_String.begin() == _String.end()); \
    EXPECT_NE(0, _String.capacity());          \
    EXPECT_NE(nullptr, _String.data());              \
    EXPECT_EQ(0, strlen(_String.c_str()));     \
    EXPECT_TRUE(_String.data() == _String.c_str())

#define AZ_TEST_VALIDATE_STRING(_String, _NumElements)                                                        \
    EXPECT_TRUE(_String.validate());                                                                       \
    EXPECT_EQ(_NumElements, _String.size());                                                           \
    EXPECT_TRUE((_String.size() > 0) ? !_String.empty() : _String.empty());                                \
    EXPECT_TRUE((_NumElements > 0) ? _String.capacity() >= _NumElements : true);                           \
    EXPECT_TRUE((_NumElements > 0) ? _String.begin() != _String.end() : _String.begin() == _String.end()); \
    EXPECT_FALSE(_String.empty());                                                                         \
    EXPECT_NE(nullptr, _String.data());                                                                      \
    EXPECT_EQ(_NumElements, strlen(_String.c_str()));

#define AZ_TEST_VALIDATE_WSTRING(_String, _NumElements)                                                       \
    EXPECT_TRUE(_String.validate());                                                                       \
    EXPECT_EQ(_NumElements, _String.size());                                                           \
    EXPECT_TRUE((_String.size() > 0) ? !_String.empty() : _String.empty());                                \
    EXPECT_TRUE((_NumElements > 0) ? _String.capacity() >= _NumElements : true);                           \
    EXPECT_TRUE((_NumElements > 0) ? _String.begin() != _String.end() : _String.begin() == _String.end()); \
    EXPECT_FALSE(_String.empty());                                                                         \
    EXPECT_NE(nullptr, _String.data());                                                                      \
    EXPECT_EQ(_NumElements, wcslen(_String.c_str()));

#if defined(AZ_COMPILER_MSVC) // just for a test purpose (we actully leak the memory)
# define strdup _strdup
#endif

namespace UnitTest
{
    void TestVSNPrintf(char* buffer, size_t bufferSize, const char* format, ...)
    {
        va_list mark;
        va_start(mark, format);
        azvsnprintf(buffer, bufferSize, format, mark);
        va_end(mark);
    }

    void TestVSWNPrintf(wchar_t* buffer, size_t bufferSize, const wchar_t* format, ...)
    {
        va_list mark;
        va_start(mark, format);
        azvsnwprintf(buffer, bufferSize, format, mark);
        va_end(mark);
    }

    TEST(StringC, VSNPrintf)
    {
        char buffer32[32];
        TestVSNPrintf(buffer32, AZ_ARRAY_SIZE(buffer32), "This is a buffer test %s", "Bla2");
        EXPECT_EQ(0, strcmp(buffer32, "This is a buffer test Bla2"));
    }

    TEST(StringC, VSWNPrintf)
    {
        wchar_t wbuffer32[32];
        TestVSWNPrintf(wbuffer32, AZ_ARRAY_SIZE(wbuffer32), L"This is a buffer test %ls", L"Bla3");
        AZ_TEST_ASSERT(wcscmp(wbuffer32, L"This is a buffer test Bla3") == 0);
    }

    TEST(StringC, AZSNPrintf)
    {
        char buffer32[32];
        azsnprintf(buffer32, AZ_ARRAY_SIZE(buffer32), "This is a buffer test %s", "Bla");
        EXPECT_EQ(0, strcmp(buffer32, "This is a buffer test Bla"));
    }

    TEST(StringC, AZSWNPrintf)
    {
        wchar_t wbuffer32[32];
        azsnwprintf(wbuffer32, AZ_ARRAY_SIZE(wbuffer32), L"This is a buffer test %ls", L"Bla1");
        EXPECT_EQ(0, wcscmp(wbuffer32, L"This is a buffer test Bla1"));
    }

    TEST(StringC, AZStrcat)
    {
        char buffer32[32];
        azsnprintf(buffer32, AZ_ARRAY_SIZE(buffer32), "This is a buffer test %s", "Bla2");
        azstrcat(buffer32, AZ_ARRAY_SIZE(buffer32), "_1");
        EXPECT_EQ(0, strcmp(buffer32, "This is a buffer test Bla2_1"));
    }

    TEST(StringC, AZStrncat)
    {
        char buffer32[32];
        azsnprintf(buffer32, AZ_ARRAY_SIZE(buffer32), "This is a buffer test %s", "Bla2");
        azstrncat(buffer32, AZ_ARRAY_SIZE(buffer32), "_23", 2);
        EXPECT_EQ(0, strcmp(buffer32, "This is a buffer test Bla2_2"));
    }

    TEST(StringC, AZStrcpy)
    {
        char buffer32[32];
        azstrcpy(buffer32, AZ_ARRAY_SIZE(buffer32), "Bla Bla 1");
        EXPECT_EQ(0, strcmp(buffer32, "Bla Bla 1"));
    }

    TEST(StringC, AZStrncpy)
    {
        char buffer32[32];
        azstrncpy(buffer32, AZ_ARRAY_SIZE(buffer32), "Gla Gla 1", 7);
        // azstrncpy note: if count is reached before the entire array src was copied, the resulting character array is not null-terminated.
        buffer32[7] = '\0';
        EXPECT_EQ(0, strcmp(buffer32, "Gla Gla"));
    }

    TEST(StringC, AZStricmp)
    {
        char buffer32[32];
        azstrncpy(buffer32, AZ_ARRAY_SIZE(buffer32), "Gla Gla 1", 7);
        // azstrncpy note: if count is reached before the entire array src was copied, the resulting character array is not null-terminated.
        buffer32[7] = '\0';
        EXPECT_EQ(0, azstricmp(buffer32, "gla gla"));
    }

    TEST(StringC, AZStrnicmp)
    {
        char buffer32[32];
        azstrncpy(buffer32, AZ_ARRAY_SIZE(buffer32), "Gla Gla 1", 7);
        EXPECT_EQ(0, azstrnicmp(buffer32, "gla", 3));
    }

    class String
        : public LeakDetectionFixture
    {
    };

    TEST_F(String, Basic)
    {
        const char* sChar = "SSO string";  // 10 characters
        const char* sCharLong = "This is a long string test that will allocate";  // 45 characters
        AZStd::array<char, 6> aChar = {
            { 'a', 'b', 'c', 'd', 'e', 'f' }
        };                                                 // short string (should use SSO)

        AZStd::string str1;
        AZ_TEST_VALIDATE_EMPTY_STRING(str1);

        // short char*
        AZStd::string str2(sChar);
        AZ_TEST_VALIDATE_STRING(str2, 10);

        AZStd::string str2_1("");
        AZ_TEST_VALIDATE_EMPTY_STRING(str2_1);

        AZStd::string str3(sChar, 5);
        AZ_TEST_VALIDATE_STRING(str3, 5);

        // long char*
        AZStd::string str4(sCharLong);
        AZ_TEST_VALIDATE_STRING(str4, 45);

        AZStd::string str5(sCharLong, 35);
        AZ_TEST_VALIDATE_STRING(str5, 35);

        // element
        AZStd::string str6(13, 'a');
        AZ_TEST_VALIDATE_STRING(str6, 13);

        AZStd::string str6_1(0, 'a');
        AZ_TEST_VALIDATE_EMPTY_STRING(str6_1);

        AZStd::string str7(aChar.begin(), aChar.end());
        AZ_TEST_VALIDATE_STRING(str7, 6);

        AZStd::string str7_1(aChar.begin(), aChar.begin());
        AZ_TEST_VALIDATE_EMPTY_STRING(str7_1);

        AZStd::string str8(sChar, sChar + 3);
        AZ_TEST_VALIDATE_STRING(str8, 3);

        AZStd::string str8_1(sChar, sChar);
        AZ_TEST_VALIDATE_EMPTY_STRING(str8_1);

        //
        AZStd::string str9(str2);
        AZ_TEST_VALIDATE_STRING(str9, 10);

        AZStd::string str9_1(str1);
        AZ_TEST_VALIDATE_EMPTY_STRING(str9_1);

        AZStd::string str10(str2, 4);
        AZ_TEST_VALIDATE_STRING(str10, 6);

        AZStd::string str11(str2, 4, 3);
        AZ_TEST_VALIDATE_STRING(str11, 3);

        AZStd::string str12(sChar);
        AZStd::string large = sCharLong;

        // move ctor
        AZStd::string strSm = AZStd::move(str12);
        AZ_TEST_VALIDATE_STRING(strSm, 10);
        AZ_TEST_VALIDATE_EMPTY_STRING(str12);

        AZStd::string strLg(AZStd::move(large));
        AZ_TEST_VALIDATE_STRING(strLg, 45);
        AZ_TEST_VALIDATE_EMPTY_STRING(large);

        AZStd::string strEmpty(AZStd::move(str1));
        AZ_TEST_VALIDATE_EMPTY_STRING(strEmpty);
        AZ_TEST_VALIDATE_EMPTY_STRING(str1);

        // move assign
        str12 = sChar;      // reset
        large = sCharLong;
        // move small string into small string
        strSm = AZStd::move(str12);
        AZ_TEST_VALIDATE_STRING(strSm, 10);
        AZ_TEST_VALIDATE_EMPTY_STRING(str12);
        // move large string into large string
        strLg = AZStd::move(large);
        AZ_TEST_VALIDATE_STRING(strLg, 45);
        AZ_TEST_VALIDATE_EMPTY_STRING(large);

        str12 = sChar;      // reset
        large = sCharLong;
        // move large string into small string
        strSm = AZStd::move(large);
        AZ_TEST_VALIDATE_STRING(strSm, 45);
        AZ_TEST_VALIDATE_EMPTY_STRING(large);
        // move small string into large string
        strLg = AZStd::move(str12);
        AZ_TEST_VALIDATE_STRING(strLg, 10);
        AZ_TEST_VALIDATE_EMPTY_STRING(str12);

        // clear small and large, validate empty
        strSm.clear();
        AZ_TEST_VALIDATE_EMPTY_STRING(strSm);
        strLg.clear();
        AZ_TEST_VALIDATE_EMPTY_STRING(strLg);

        str2.append(str3);
        AZ_TEST_VALIDATE_STRING(str2, 15);
        AZ_TEST_ASSERT(str2[10] == 'S');

        str3.append(str4, 10, 4);
        AZ_TEST_VALIDATE_STRING(str3, 9);
        AZ_TEST_ASSERT(str3[5] == 'l');

        str4.append(sChar);
        AZ_TEST_VALIDATE_STRING(str4, 55);
        AZ_TEST_ASSERT(str4[45] == 'S');

        str5.append(10, 'b');
        AZ_TEST_VALIDATE_STRING(str5, 45);
        AZ_TEST_ASSERT(str5[35] == 'b');

        str6.append(aChar.begin(), aChar.end());
        AZ_TEST_VALIDATE_STRING(str6, 19);
        AZ_TEST_ASSERT(str6[14] == 'b');

        str7.append(sCharLong + 10, sCharLong + 14);
        AZ_TEST_VALIDATE_STRING(str7, 10);
        AZ_TEST_ASSERT(str7[6] == 'l');

        str2.assign(str9);
        AZ_TEST_VALIDATE_STRING(str2, 10);
        AZ_TEST_ASSERT(str2[0] == 'S');

        str3.assign(str9, 5, 5);
        AZ_TEST_VALIDATE_STRING(str3, 5);
        AZ_TEST_ASSERT(str3[0] == 't');

        str2.assign(sCharLong, 25);
        AZ_TEST_VALIDATE_STRING(str2, 25);
        AZ_TEST_ASSERT(str2[10] == 'l');

        str2.assign(sChar);
        AZ_TEST_VALIDATE_STRING(str2, 10);
        AZ_TEST_ASSERT(str2[0] == 'S');

        str2.assign(5, 'a');
        AZ_TEST_VALIDATE_STRING(str2, 5);
        AZ_TEST_ASSERT(str2[4] == 'a');

        str2.assign(aChar.begin(), aChar.end());
        AZ_TEST_VALIDATE_STRING(str2, 6);
        AZ_TEST_ASSERT(str2[1] == 'b');

        str2.assign(sChar, sChar + 5);
        AZ_TEST_VALIDATE_STRING(str2, 5);
        AZ_TEST_ASSERT(str2[0] == 'S');

        str1.clear();
        AZ_TEST_VALIDATE_EMPTY_STRING(str1);

        str1.assign(sCharLong);
        AZ_TEST_VALIDATE_STRING(str1, 45);
        AZ_TEST_ASSERT(str1[10] == 'l');

        str1.insert(10, str9, 4, 6);
        AZ_TEST_VALIDATE_STRING(str1, 51);
        AZ_TEST_ASSERT(str1[10] == 's');

        str2.insert(3, sChar, 5);
        AZ_TEST_VALIDATE_STRING(str2, 10);
        AZ_TEST_ASSERT(str2[0] == 'S');
        AZ_TEST_ASSERT(str2[3] == 'S');

        str2.insert(5, sChar);
        AZ_TEST_VALIDATE_STRING(str2, 20);
        AZ_TEST_ASSERT(str2[4] == 'S');

        str2.insert(10, 5, 'g');
        AZ_TEST_VALIDATE_STRING(str2, 25);
        AZ_TEST_ASSERT(str2[10] == 'g');
        AZ_TEST_ASSERT(str2[14] == 'g');

        str2.insert(str2.end(), 'b');
        AZ_TEST_VALIDATE_STRING(str2, 26);
        AZ_TEST_ASSERT(str2[25] == 'b');

        str2.insert(str2.end(), 2, 'c');
        AZ_TEST_VALIDATE_STRING(str2, 28);
        AZ_TEST_ASSERT(str2[26] == 'c');
        AZ_TEST_ASSERT(str2[27] == 'c');

        str2.insert(str2.begin(), aChar.begin(), aChar.end());
        AZ_TEST_VALIDATE_STRING(str2, 34);
        AZ_TEST_ASSERT(str2[0] == 'a');
        AZ_TEST_ASSERT(str2[1] == 'b');

        str2.erase(16, 5);
        AZ_TEST_VALIDATE_STRING(str2, 29);
        AZ_TEST_ASSERT(str2[10] != 'g');
        AZ_TEST_ASSERT(str2[14] != 'g');

        str2.erase(str2.begin());
        AZ_TEST_VALIDATE_STRING(str2, 28);
        AZ_TEST_ASSERT(str2[0] == 'b');

        str2.erase(str2.begin(), AZStd::next(str2.begin(), 4));
        AZ_TEST_VALIDATE_STRING(str2, 24);
        AZ_TEST_ASSERT(str2[0] == 'f');

        str1.assign(aChar.begin(), aChar.end());

        str2.replace(1, 6, str1);
        AZ_TEST_VALIDATE_STRING(str2, 24);
        AZ_TEST_ASSERT(str2[0] == 'f');
        AZ_TEST_ASSERT(str2[1] == 'a');
        AZ_TEST_ASSERT(str2[5] == 'e');

        str2.replace(6, 1, str1, 5, 1);
        AZ_TEST_VALIDATE_STRING(str2, 24);
        AZ_TEST_ASSERT(str2[6] == 'f');

        str2.replace(3, 2, sCharLong, 2);
        AZ_TEST_VALIDATE_STRING(str2, 24);
        AZ_TEST_ASSERT(str2[3] == 'T');
        AZ_TEST_ASSERT(str2[4] == 'h');

        str2.replace(3, 10, sChar);
        AZ_TEST_VALIDATE_STRING(str2, 24);
        AZ_TEST_ASSERT(str2[3] == 'S');
        AZ_TEST_ASSERT(str2[4] == 'S');

        str2.replace(3, 2, 2, 'g');
        AZ_TEST_VALIDATE_STRING(str2, 24);
        AZ_TEST_ASSERT(str2[3] == 'g');
        AZ_TEST_ASSERT(str2[4] == 'g');

        str2.replace(str2.begin(), AZStd::next(str2.begin(), str1.length()), str1);
        AZ_TEST_VALIDATE_STRING(str2, 24);
        AZ_TEST_ASSERT(str2[0] == 'a');
        AZ_TEST_ASSERT(str2[1] == 'b');

        str2.replace(str2.begin(), AZStd::next(str2.begin(), 10), sChar);
        AZ_TEST_VALIDATE_STRING(str2, 24);
        AZ_TEST_ASSERT(str2[0] == 'S');
        AZ_TEST_ASSERT(str2[1] == 'S');

        str2.replace(str2.begin(), AZStd::next(str2.begin(), 3), sChar, 3);
        AZ_TEST_VALIDATE_STRING(str2, 24);
        AZ_TEST_ASSERT(str2[0] == 'S');
        AZ_TEST_ASSERT(str2[1] == 'S');
        AZ_TEST_ASSERT(str2[2] == 'O');

        str2.replace(str2.begin(), AZStd::next(str2.begin(), 2), 2, 'h');
        AZ_TEST_VALIDATE_STRING(str2, 24);
        AZ_TEST_ASSERT(str2[0] == 'h');
        AZ_TEST_ASSERT(str2[1] == 'h');

        str2.replace(str2.begin(), AZStd::next(str2.begin(), 2), aChar.begin(), AZStd::next(aChar.begin(), 2));
        AZ_TEST_VALIDATE_STRING(str2, 24);
        AZ_TEST_ASSERT(str2[0] == 'a');
        AZ_TEST_ASSERT(str2[1] == 'b');

        str2.replace(str2.begin(), AZStd::next(str2.begin(), 2), sChar, sChar + 5);
        AZ_TEST_VALIDATE_STRING(str2, 27);
        AZ_TEST_ASSERT(str2[0] == 'S');
        AZ_TEST_ASSERT(str2[1] == 'S');

        AZ_TEST_ASSERT(str2.at(0) == 'S');
        str2.at(0) = 'E';
        AZ_TEST_ASSERT(str2.at(0) == 'E');
        str2[0] = 'G';
        AZ_TEST_ASSERT(str2.at(0) == 'G');

        AZ_TEST_ASSERT(str2.front() == 'G');
        str2.front() = 'X';
        AZ_TEST_ASSERT(str2.front() == 'X');
        AZ_TEST_ASSERT(str2.back() == 'c'); // From the insert of 2 'c's at the end() further up.
        str2.back() = 'p';
        AZ_TEST_ASSERT(str2.back() == 'p');

        AZ_TEST_ASSERT(str2.c_str() != nullptr);
        AZ_TEST_ASSERT(::strlen(str2.c_str()) == str2.length());

        str2.resize(30, 'm');
        AZ_TEST_VALIDATE_STRING(str2, 30);
        AZ_TEST_ASSERT(str2[29] == 'm');

        str2.reserve(100);
        AZ_TEST_VALIDATE_STRING(str2, 30);
        AZ_TEST_ASSERT(str2.capacity() >= 100);

        char myCharArray[128];  // make sure it's big enough or use make the copy safe
        AZ_TEST_ASSERT(str2.copy(myCharArray, AZ_ARRAY_SIZE(myCharArray), 1) == str2.length() - 1);

        str1.clear();
        str2.swap(str1);
        AZ_TEST_VALIDATE_STRING(str1, 30);
        AZ_TEST_VALIDATE_EMPTY_STRING(str2);
        str1.assign(sChar);
        str2.assign(sChar + 2, sChar + 5);

        str1.append(sChar);

        AZStd::size_t pos;

        pos = str1.find(str2);
        AZ_TEST_ASSERT(pos == 2);

        pos = str1.find(str2, 1);
        AZ_TEST_ASSERT(pos == 2);

        pos = str1.find(str2, 3);  // skip the first
        AZ_TEST_ASSERT(pos == 12);

        pos = str1.find(sChar, 1, 10);
        AZ_TEST_ASSERT(pos == 10);

        const char sStr[] = "string";
        pos = str1.find(sStr);
        AZ_TEST_ASSERT(pos == 4);

        pos = str1.find('O');
        AZ_TEST_ASSERT(pos == 2);

        pos = str1.find('Z');
        AZ_TEST_ASSERT(pos == AZStd::string::npos);

        pos = str1.rfind(str2);
        AZ_TEST_ASSERT(pos == 12);

        pos = str1.rfind(str2);
        AZ_TEST_ASSERT(pos == 12);

        pos = str1.rfind(sChar, 0, 10);
        AZ_TEST_ASSERT(pos == 0);

        pos = str1.rfind(sChar);
        AZ_TEST_ASSERT(pos == 10);

        pos = str1.rfind(sChar, 11);
        AZ_TEST_ASSERT(pos == 10);

        pos = str1.rfind('O');
        AZ_TEST_ASSERT(pos == 12);

        pos = str1.rfind('Z');
        AZ_TEST_ASSERT(pos == AZStd::string::npos);

        pos = str1.find_first_of(str2);
        AZ_TEST_ASSERT(pos == 2);

        pos = str1.find_first_of(str2, 10);
        AZ_TEST_ASSERT(pos == 12);

        pos = str1.find_first_of(sChar, 0, 15);
        AZ_TEST_ASSERT(pos == 0);

        pos = str1.find_first_of(sChar, 3, 10);
        AZ_TEST_ASSERT(pos == 3);

        pos = str1.find_first_of(sChar, 7);
        AZ_TEST_ASSERT(pos == 7);
        pos = str1.find_first_of(sChar);
        AZ_TEST_ASSERT(pos == 0);

        pos = str1.find_first_of('O');
        AZ_TEST_ASSERT(pos == 2);
        pos = str1.find_first_of('O', 10);
        AZ_TEST_ASSERT(pos == 12);

        pos = str1.find_first_of('Z');
        AZ_TEST_ASSERT(pos == AZStd::string::npos);

        pos = str1.find_last_of(str2);
        AZ_TEST_ASSERT(pos == 14);

        pos = str1.find_last_of(str2, 3);
        AZ_TEST_ASSERT(pos == 3);

        pos = str1.find_last_of(sChar, 4);
        AZ_TEST_ASSERT(pos == 4);

        pos = str1.find_last_of('O');
        AZ_TEST_ASSERT(pos == 12);

        pos = str1.find_last_of('Z');
        AZ_TEST_ASSERT(pos == AZStd::string::npos);

        pos = str1.find_first_not_of(str2, 3);
        AZ_TEST_ASSERT(pos == 5);

        pos = str1.find_first_not_of('Z');
        AZ_TEST_ASSERT(pos == 0);

        pos = str1.find_last_not_of(sChar);
        AZ_TEST_ASSERT(pos == AZStd::string::npos);

        pos = str1.find_last_not_of('Z');
        AZ_TEST_ASSERT(pos == 19);


        AZStd::string sub = str1.substr(0, 10);
        AZ_TEST_VALIDATE_STRING(sub, 10);
        AZ_TEST_ASSERT(sub[0] == 'S');
        AZ_TEST_ASSERT(sub[9] == 'g');

        int cmpRes;
        cmpRes = str1.compare(str1);
        AZ_TEST_ASSERT(cmpRes == 0);

        cmpRes = str1.compare(str2);
        AZ_TEST_ASSERT(cmpRes > 0);

        cmpRes = str1.compare(2, 3, str2);
        AZ_TEST_ASSERT(cmpRes == 0);

        cmpRes = str1.compare(12, 2, str2, 0, 2);
        AZ_TEST_ASSERT(cmpRes == 0);
        cmpRes = str1.compare(3, 1, str2, 0, 1);
        AZ_TEST_ASSERT(cmpRes < 0);

        cmpRes = str1.compare(sChar);
        AZ_TEST_ASSERT(cmpRes > 0);
        cmpRes = str1.compare(10, 10, sChar);
        AZ_TEST_ASSERT(cmpRes == 0);
        cmpRes = str1.compare(11, 3, sChar, 3);
        AZ_TEST_ASSERT(cmpRes < 0);

        using iteratorType = char;
        auto testValue = str4;
        AZStd::reverse_iterator<iteratorType*> rend = testValue.rend();
        AZStd::reverse_iterator<const iteratorType*> crend1 = testValue.rend();
        AZStd::reverse_iterator<const iteratorType*> crend2 = testValue.crend();

        AZStd::reverse_iterator<iteratorType*> rbegin = testValue.rbegin();
        AZStd::reverse_iterator<const iteratorType*> crbegin1 = testValue.rbegin();
        AZStd::reverse_iterator<const iteratorType*> crbegin2 = testValue.crbegin();

        AZ_TEST_ASSERT(rend == crend1);
        AZ_TEST_ASSERT(crend1 == crend2);

        AZ_TEST_ASSERT(rbegin == crbegin1);
        AZ_TEST_ASSERT(crbegin1 == crbegin2);

        AZ_TEST_ASSERT(rbegin != rend);

        str1.set_capacity(3);
        AZ_TEST_VALIDATE_STRING(str1, 3);
        AZ_TEST_ASSERT(str1[0] == 'S');
        AZ_TEST_ASSERT(str1[1] == 'S');
        AZ_TEST_ASSERT(str1[2] == 'O');

        str1.clear();
        for (int i = 0; i < 10000; ++i)
        {
            str1 += 'i';
        }
        AZ_TEST_ASSERT(str1.size() == 10000);
        for (int i = 0; i < 10000; ++i)
        {
            AZ_TEST_ASSERT(str1[i] == 'i');
        }
    }

    TEST_F(String, Algorithms)
    {
        AZStd::string str = AZStd::string::format("%s %d", "BlaBla", 5);
        AZ_TEST_VALIDATE_STRING(str, 8);

        AZStd::wstring wstr = AZStd::wstring::format(L"%ls %d", L"BlaBla", 5);
        AZ_TEST_VALIDATE_WSTRING(wstr, 8);

        AZStd::to_lower(str.begin(), str.end());
        AZ_TEST_ASSERT(str[0] == 'b');
        AZ_TEST_ASSERT(str[3] == 'b');

        AZStd::to_upper(str.begin(), str.end());
        AZ_TEST_ASSERT(str[1] == 'L');
        AZ_TEST_ASSERT(str[2] == 'A');

        AZStd::string intStr("10");
        int ival = AZStd::stoi(intStr);
        AZ_TEST_ASSERT(ival == 10);

        AZStd::wstring wintStr(L"10");
        ival = AZStd::stoi(wintStr);
        AZ_TEST_ASSERT(ival == 10);

        AZStd::string floatStr("2.32");
        float fval = AZStd::stof(floatStr);
        AZ_TEST_ASSERT_FLOAT_CLOSE(fval, 2.32f);

        AZStd::wstring wfloatStr(L"2.32");
        fval = AZStd::stof(wfloatStr);
        AZ_TEST_ASSERT_FLOAT_CLOSE(fval, 2.32f);

        // wstring to string
        AZStd::string str1;
        AZStd::to_string(str1, wstr);
        AZ_TEST_ASSERT(str1 == "BlaBla 5");
        EXPECT_EQ(8, to_string_length(wstr));

        str1 = AZStd::string::format("%ls", wstr.c_str());
        AZ_TEST_ASSERT(str1 == "BlaBla 5");

        // string to wstring
        AZStd::wstring wstr1;
        AZStd::to_wstring(wstr1, str);
        AZ_TEST_ASSERT(wstr1 == L"BLABLA 5");

        wstr1 = AZStd::wstring::format(L"%hs", str.c_str());
        AZ_TEST_ASSERT(wstr1 == L"BLABLA 5");

        // wstring to char buffer
        char strBuffer[9];
        AZStd::to_string(strBuffer, 9, wstr1.c_str());
        AZ_TEST_ASSERT(0 == azstricmp(strBuffer, "BLABLA 5"));
        EXPECT_EQ(8, to_string_length(wstr1));

        // wstring to char with unicode
        AZStd::wstring ws1InfinityEscaped = L"Infinity: \u221E"; // escaped
        EXPECT_EQ(13, to_string_length(ws1InfinityEscaped));

        // wchar_t buffer to char buffer
        wchar_t wstrBuffer[9] = L"BLABLA 5";
        memset(strBuffer, 0, AZ_ARRAY_SIZE(strBuffer));
        AZStd::to_string(strBuffer, 9, wstrBuffer);
        AZ_TEST_ASSERT(0 == azstricmp(strBuffer, "BLABLA 5"));

        // string to wchar_t buffer
        memset(wstrBuffer, 0, AZ_ARRAY_SIZE(wstrBuffer));
        AZStd::to_wstring(wstrBuffer, 9, str1.c_str());
        AZ_TEST_ASSERT(0 == azwcsicmp(wstrBuffer, L"BlaBla 5"));

        // char buffer to wchar_t buffer
        memset(wstrBuffer, L' ', AZ_ARRAY_SIZE(wstrBuffer)); // to check that the null terminator is properly placed
        AZStd::to_wstring(wstrBuffer, 9, strBuffer);
        AZ_TEST_ASSERT(0 == azwcsicmp(wstrBuffer, L"BLABLA 5"));

        // wchar UTF16/UTF32 to/from Utf8
        wstr1 = L"this is a \u20AC \u00A3 test"; // that's a euro and a pound sterling
        AZStd::to_string(str, wstr1);
        AZStd::wstring wstr2;
        AZStd::to_wstring(wstr2, str);
        AZ_TEST_ASSERT(wstr1 == wstr2);

        // tokenize
        AZStd::vector<AZStd::string> tokens;
        AZStd::tokenize(AZStd::string("one, two, three"), AZStd::string(", "), tokens);
        AZ_TEST_ASSERT(tokens.size() == 3);
        AZ_TEST_ASSERT(tokens[0] == "one");
        AZ_TEST_ASSERT(tokens[1] == "two");
        AZ_TEST_ASSERT(tokens[2] == "three");
        AZStd::tokenize(AZStd::string("one, ,, two, ,, three"), AZStd::string(", "), tokens);
        AZ_TEST_ASSERT(tokens.size() == 3);
        AZ_TEST_ASSERT(tokens[0] == "one");
        AZ_TEST_ASSERT(tokens[1] == "two");
        AZ_TEST_ASSERT(tokens[2] == "three");
        AZStd::tokenize(AZStd::string("thequickbrownfox"), AZStd::string("ABC"), tokens);
        AZ_TEST_ASSERT(tokens.size() == 1);
        AZ_TEST_ASSERT(tokens[0] == "thequickbrownfox");

        AZStd::tokenize(AZStd::string{}, AZStd::string{}, tokens);
        AZ_TEST_ASSERT(tokens.empty());
        AZStd::tokenize(AZStd::string("ABC"), AZStd::string("ABC"), tokens);
        AZ_TEST_ASSERT(tokens.empty());
        AZStd::tokenize(AZStd::string(" foo bar "), AZStd::string(" "), tokens);
        AZ_TEST_ASSERT(tokens.size() == 2);
        AZ_TEST_ASSERT(tokens[0] == "foo");
        AZ_TEST_ASSERT(tokens[1] == "bar");

        AZStd::tokenize_keep_empty(AZStd::string(" foo ,  bar "), AZStd::string(","), tokens);
        AZ_TEST_ASSERT(tokens.size() == 2);
        AZ_TEST_ASSERT(tokens[0] == " foo ");
        AZ_TEST_ASSERT(tokens[1] == "  bar ");

        // Sort
        AZStd::vector<AZStd::string> toSort;
        toSort.push_back("z2");
        toSort.push_back("z100");
        toSort.push_back("z1");
        AZStd::sort(toSort.begin(), toSort.end());
        AZ_TEST_ASSERT(toSort[0] == "z1");
        AZ_TEST_ASSERT(toSort[1] == "z100");
        AZ_TEST_ASSERT(toSort[2] == "z2");

        // Natural sort
        AZ_TEST_ASSERT(AZStd::alphanum_comp("", "") == 0);
        AZ_TEST_ASSERT(AZStd::alphanum_comp("", "a") < 0);
        AZ_TEST_ASSERT(AZStd::alphanum_comp("a", "") > 0);
        AZ_TEST_ASSERT(AZStd::alphanum_comp("a", "a") == 0);
        AZ_TEST_ASSERT(AZStd::alphanum_comp("", "9") < 0);
        AZ_TEST_ASSERT(AZStd::alphanum_comp("9", "") > 0);
        AZ_TEST_ASSERT(AZStd::alphanum_comp("1", "1") == 0);
        AZ_TEST_ASSERT(AZStd::alphanum_comp("1", "2") < 0);
        AZ_TEST_ASSERT(AZStd::alphanum_comp("3", "2") > 0);
        AZ_TEST_ASSERT(AZStd::alphanum_comp("a1", "a1") == 0);
        AZ_TEST_ASSERT(AZStd::alphanum_comp("a1", "a2") < 0);
        AZ_TEST_ASSERT(AZStd::alphanum_comp("a2", "a1") > 0);
        AZ_TEST_ASSERT(AZStd::alphanum_comp("a1a2", "a1a3") < 0);
        AZ_TEST_ASSERT(AZStd::alphanum_comp("a1a2", "a1a0") > 0);
        AZ_TEST_ASSERT(AZStd::alphanum_comp("134", "122") > 0);
        AZ_TEST_ASSERT(AZStd::alphanum_comp("12a3", "12a3") == 0);
        AZ_TEST_ASSERT(AZStd::alphanum_comp("12a1", "12a0") > 0);
        AZ_TEST_ASSERT(AZStd::alphanum_comp("12a1", "12a2") < 0);
        AZ_TEST_ASSERT(AZStd::alphanum_comp("a", "aa") < 0);
        AZ_TEST_ASSERT(AZStd::alphanum_comp("aaa", "aa") > 0);
        AZ_TEST_ASSERT(AZStd::alphanum_comp("Alpha 2", "Alpha 2") == 0);
        AZ_TEST_ASSERT(AZStd::alphanum_comp("Alpha 2", "Alpha 2A") < 0);
        AZ_TEST_ASSERT(AZStd::alphanum_comp("Alpha 2 B", "Alpha 2") > 0);
        AZStd::string strA("Alpha 2");
        AZ_TEST_ASSERT(AZStd::alphanum_comp(strA, "Alpha 2") == 0);
        AZ_TEST_ASSERT(AZStd::alphanum_comp(strA, "Alpha 2A") < 0);
        AZ_TEST_ASSERT(AZStd::alphanum_comp("Alpha 2 B", strA) > 0);

        // show usage of the comparison functor with a set
        using StringSetType = AZStd::set<AZStd::string, AZStd::alphanum_less<AZStd::string>>;
        StringSetType s;
        s.insert("Xiph Xlater 58");
        s.insert("Xiph Xlater 5000");
        s.insert("Xiph Xlater 500");
        s.insert("Xiph Xlater 50");
        s.insert("Xiph Xlater 5");
        s.insert("Xiph Xlater 40");
        s.insert("Xiph Xlater 300");
        s.insert("Xiph Xlater 2000");
        s.insert("Xiph Xlater 10000");
        s.insert("QRS-62F Intrinsia Machine");
        s.insert("QRS-62 Intrinsia Machine");
        s.insert("QRS-60F Intrinsia Machine");
        s.insert("QRS-60 Intrinsia Machine");
        s.insert("Callisto Morphamax 7000 SE2");
        s.insert("Callisto Morphamax 7000 SE");
        s.insert("Callisto Morphamax 7000");
        s.insert("Callisto Morphamax 700");
        s.insert("Callisto Morphamax 600");
        s.insert("Callisto Morphamax 5000");
        s.insert("Callisto Morphamax 500");
        s.insert("Callisto Morphamax");
        s.insert("Alpha 2A-900");
        s.insert("Alpha 2A-8000");
        s.insert("Alpha 2A");
        s.insert("Alpha 200");
        s.insert("Alpha 2");
        s.insert("Alpha 100");
        s.insert("Allegia 60 Clasteron");
        s.insert("Allegia 52 Clasteron");
        s.insert("Allegia 51B Clasteron");
        s.insert("Allegia 51 Clasteron");
        s.insert("Allegia 500 Clasteron");
        s.insert("Allegia 50 Clasteron");
        s.insert("40X Radonius");
        s.insert("30X Radonius");
        s.insert("20X Radonius Prime");
        s.insert("20X Radonius");
        s.insert("200X Radonius");
        s.insert("10X Radonius");
        s.insert("1000X Radonius Maximus");
        // check sorting
        StringSetType::const_iterator setIt = s.begin();
        AZ_TEST_ASSERT(*setIt++ == "10X Radonius");
        AZ_TEST_ASSERT(*setIt++ == "20X Radonius");
        AZ_TEST_ASSERT(*setIt++ == "20X Radonius Prime");
        AZ_TEST_ASSERT(*setIt++ == "30X Radonius");
        AZ_TEST_ASSERT(*setIt++ == "40X Radonius");
        AZ_TEST_ASSERT(*setIt++ == "200X Radonius");
        AZ_TEST_ASSERT(*setIt++ == "1000X Radonius Maximus");
        AZ_TEST_ASSERT(*setIt++ == "Allegia 50 Clasteron");
        AZ_TEST_ASSERT(*setIt++ == "Allegia 51 Clasteron");
        AZ_TEST_ASSERT(*setIt++ == "Allegia 51B Clasteron");
        AZ_TEST_ASSERT(*setIt++ == "Allegia 52 Clasteron");
        AZ_TEST_ASSERT(*setIt++ == "Allegia 60 Clasteron");
        AZ_TEST_ASSERT(*setIt++ == "Allegia 500 Clasteron");
        AZ_TEST_ASSERT(*setIt++ == "Alpha 2");
        AZ_TEST_ASSERT(*setIt++ == "Alpha 2A");
        AZ_TEST_ASSERT(*setIt++ == "Alpha 2A-900");
        AZ_TEST_ASSERT(*setIt++ == "Alpha 2A-8000");
        AZ_TEST_ASSERT(*setIt++ == "Alpha 100");
        AZ_TEST_ASSERT(*setIt++ == "Alpha 200");
        AZ_TEST_ASSERT(*setIt++ == "Callisto Morphamax");
        AZ_TEST_ASSERT(*setIt++ == "Callisto Morphamax 500");
        AZ_TEST_ASSERT(*setIt++ == "Callisto Morphamax 600");
        AZ_TEST_ASSERT(*setIt++ == "Callisto Morphamax 700");
        AZ_TEST_ASSERT(*setIt++ == "Callisto Morphamax 5000");
        AZ_TEST_ASSERT(*setIt++ == "Callisto Morphamax 7000");
        AZ_TEST_ASSERT(*setIt++ == "Callisto Morphamax 7000 SE");
        AZ_TEST_ASSERT(*setIt++ == "Callisto Morphamax 7000 SE2");
        AZ_TEST_ASSERT(*setIt++ == "QRS-60 Intrinsia Machine");
        AZ_TEST_ASSERT(*setIt++ == "QRS-60F Intrinsia Machine");
        AZ_TEST_ASSERT(*setIt++ == "QRS-62 Intrinsia Machine");
        AZ_TEST_ASSERT(*setIt++ == "QRS-62F Intrinsia Machine");
        AZ_TEST_ASSERT(*setIt++ == "Xiph Xlater 5");
        AZ_TEST_ASSERT(*setIt++ == "Xiph Xlater 40");
        AZ_TEST_ASSERT(*setIt++ == "Xiph Xlater 50");
        AZ_TEST_ASSERT(*setIt++ == "Xiph Xlater 58");
        AZ_TEST_ASSERT(*setIt++ == "Xiph Xlater 300");
        AZ_TEST_ASSERT(*setIt++ == "Xiph Xlater 500");
        AZ_TEST_ASSERT(*setIt++ == "Xiph Xlater 2000");
        AZ_TEST_ASSERT(*setIt++ == "Xiph Xlater 5000");
        AZ_TEST_ASSERT(*setIt++ == "Xiph Xlater 10000");

        // show usage of comparison functor with a map
        using StringIntMapType = AZStd::map<AZStd::string, int, AZStd::alphanum_less<AZStd::string>>;
        StringIntMapType m;
        m["z1.doc"] = 1;
        m["z10.doc"] = 2;
        m["z100.doc"] = 3;
        m["z101.doc"] = 4;
        m["z102.doc"] = 5;
        m["z11.doc"] = 6;
        m["z12.doc"] = 7;
        m["z13.doc"] = 8;
        m["z14.doc"] = 9;
        m["z15.doc"] = 10;
        m["z16.doc"] = 11;
        m["z17.doc"] = 12;
        m["z18.doc"] = 13;
        m["z19.doc"] = 14;
        m["z2.doc"] = 15;
        m["z20.doc"] = 16;
        m["z3.doc"] = 17;
        m["z4.doc"] = 18;
        m["z5.doc"] = 19;
        m["z6.doc"] = 20;
        m["z7.doc"] = 21;
        m["z8.doc"] = 22;
        m["z9.doc"] = 23;
        // check sorting
        StringIntMapType::const_iterator mapIt = m.begin();
        AZ_TEST_ASSERT((mapIt++)->second == 1);
        AZ_TEST_ASSERT((mapIt++)->second == 15);
        AZ_TEST_ASSERT((mapIt++)->second == 17);
        AZ_TEST_ASSERT((mapIt++)->second == 18);
        AZ_TEST_ASSERT((mapIt++)->second == 19);
        AZ_TEST_ASSERT((mapIt++)->second == 20);
        AZ_TEST_ASSERT((mapIt++)->second == 21);
        AZ_TEST_ASSERT((mapIt++)->second == 22);
        AZ_TEST_ASSERT((mapIt++)->second == 23);
        AZ_TEST_ASSERT((mapIt++)->second == 2);
        AZ_TEST_ASSERT((mapIt++)->second == 6);
        AZ_TEST_ASSERT((mapIt++)->second == 7);
        AZ_TEST_ASSERT((mapIt++)->second == 8);
        AZ_TEST_ASSERT((mapIt++)->second == 9);
        AZ_TEST_ASSERT((mapIt++)->second == 10);
        AZ_TEST_ASSERT((mapIt++)->second == 11);
        AZ_TEST_ASSERT((mapIt++)->second == 12);
        AZ_TEST_ASSERT((mapIt++)->second == 13);
        AZ_TEST_ASSERT((mapIt++)->second == 14);
        AZ_TEST_ASSERT((mapIt++)->second == 16);
        AZ_TEST_ASSERT((mapIt++)->second == 3);
        AZ_TEST_ASSERT((mapIt++)->second == 4);
        AZ_TEST_ASSERT((mapIt++)->second == 5);

        // show usage of comparison functor with an STL algorithm on a vector
        AZStd::vector<AZStd::string> v;
        // vector contents are reversed sorted contents of the old set
        AZStd::copy(s.rbegin(), s.rend(), AZStd::back_inserter(v));
        // now sort the vector with the algorithm
        AZStd::sort(v.begin(), v.end(), AZStd::alphanum_less<AZStd::string>());
        // check values
        AZStd::vector<AZStd::string>::const_iterator vecIt = v.begin();
        AZ_TEST_ASSERT(*vecIt++ == "10X Radonius");
        AZ_TEST_ASSERT(*vecIt++ == "20X Radonius");
        AZ_TEST_ASSERT(*vecIt++ == "20X Radonius Prime");
        AZ_TEST_ASSERT(*vecIt++ == "30X Radonius");
        AZ_TEST_ASSERT(*vecIt++ == "40X Radonius");
        AZ_TEST_ASSERT(*vecIt++ == "200X Radonius");
        AZ_TEST_ASSERT(*vecIt++ == "1000X Radonius Maximus");
        AZ_TEST_ASSERT(*vecIt++ == "Allegia 50 Clasteron");
        AZ_TEST_ASSERT(*vecIt++ == "Allegia 51 Clasteron");
        AZ_TEST_ASSERT(*vecIt++ == "Allegia 51B Clasteron");
        AZ_TEST_ASSERT(*vecIt++ == "Allegia 52 Clasteron");
        AZ_TEST_ASSERT(*vecIt++ == "Allegia 60 Clasteron");
        AZ_TEST_ASSERT(*vecIt++ == "Allegia 500 Clasteron");
        AZ_TEST_ASSERT(*vecIt++ == "Alpha 2");
        AZ_TEST_ASSERT(*vecIt++ == "Alpha 2A");
        AZ_TEST_ASSERT(*vecIt++ == "Alpha 2A-900");
        AZ_TEST_ASSERT(*vecIt++ == "Alpha 2A-8000");
        AZ_TEST_ASSERT(*vecIt++ == "Alpha 100");
        AZ_TEST_ASSERT(*vecIt++ == "Alpha 200");
        AZ_TEST_ASSERT(*vecIt++ == "Callisto Morphamax");
        AZ_TEST_ASSERT(*vecIt++ == "Callisto Morphamax 500");
        AZ_TEST_ASSERT(*vecIt++ == "Callisto Morphamax 600");
        AZ_TEST_ASSERT(*vecIt++ == "Callisto Morphamax 700");
        AZ_TEST_ASSERT(*vecIt++ == "Callisto Morphamax 5000");
        AZ_TEST_ASSERT(*vecIt++ == "Callisto Morphamax 7000");
        AZ_TEST_ASSERT(*vecIt++ == "Callisto Morphamax 7000 SE");
        AZ_TEST_ASSERT(*vecIt++ == "Callisto Morphamax 7000 SE2");
        AZ_TEST_ASSERT(*vecIt++ == "QRS-60 Intrinsia Machine");
        AZ_TEST_ASSERT(*vecIt++ == "QRS-60F Intrinsia Machine");
        AZ_TEST_ASSERT(*vecIt++ == "QRS-62 Intrinsia Machine");
        AZ_TEST_ASSERT(*vecIt++ == "QRS-62F Intrinsia Machine");
        AZ_TEST_ASSERT(*vecIt++ == "Xiph Xlater 5");
        AZ_TEST_ASSERT(*vecIt++ == "Xiph Xlater 40");
        AZ_TEST_ASSERT(*vecIt++ == "Xiph Xlater 50");
        AZ_TEST_ASSERT(*vecIt++ == "Xiph Xlater 58");
        AZ_TEST_ASSERT(*vecIt++ == "Xiph Xlater 300");
        AZ_TEST_ASSERT(*vecIt++ == "Xiph Xlater 500");
        AZ_TEST_ASSERT(*vecIt++ == "Xiph Xlater 2000");
        AZ_TEST_ASSERT(*vecIt++ == "Xiph Xlater 5000");
        AZ_TEST_ASSERT(*vecIt++ == "Xiph Xlater 10000");
    }

    // Concept to model if AZStd::to_string(<type>) is a valid expression
    template<class T, class = void>
    constexpr bool IsToStringInvocable = false;

    template<class T>
    constexpr bool IsToStringInvocable<T, AZStd::void_t<decltype(AZStd::to_string(AZStd::declval<T>()))>> = true;

    TEST_F(String, String_to_stringOverload_DoesNotImplicitlyConvertToBool)
    {
        AZStd::string intStr;
        AZStd::to_string(intStr, 20);
        EXPECT_EQ("20", intStr);

        EXPECT_EQ("20", AZStd::to_string(static_cast<int16_t>(20)));
        EXPECT_EQ("20", AZStd::to_string(static_cast<uint16_t>(20)));
        EXPECT_EQ("20", AZStd::to_string(static_cast<int32_t>(20)));
        EXPECT_EQ("20", AZStd::to_string(static_cast<uint32_t>(20)));
        EXPECT_EQ("20", AZStd::to_string(static_cast<int64_t>(20)));
        EXPECT_EQ("20", AZStd::to_string(static_cast<uint64_t>(20)));
        EXPECT_EQ("false", AZStd::to_string(false));
        EXPECT_EQ("true", AZStd::to_string(true));

        // AZStd::to_string should not be invocable with a char or wchar_t literal
        static_assert(!IsToStringInvocable<decltype("NarrowStrLiteral")>);
        static_assert(!IsToStringInvocable<decltype(L"WideStrLiteral")>);

        // AZStd::to_string should be invocable with the following types
        static_assert(IsToStringInvocable<bool>);
        static_assert(IsToStringInvocable<AZ::s8>);
        static_assert(IsToStringInvocable<AZ::u8>);
        static_assert(IsToStringInvocable<AZ::s16>);
        static_assert(IsToStringInvocable<AZ::u16>);
        static_assert(IsToStringInvocable<AZ::s32>);
        static_assert(IsToStringInvocable<AZ::u32>);
        static_assert(IsToStringInvocable<AZ::s64>);
        static_assert(IsToStringInvocable<AZ::u64>);
        static_assert(IsToStringInvocable<float>);
        static_assert(IsToStringInvocable<double>);
        static_assert(IsToStringInvocable<long double>);
    }

    class Regex
        : public LeakDetectionFixture
    {
    };

    TEST_F(Regex, Regex_IPAddressSubnetPattern_Success)
    {
        // Error case for LY-43888
        AZStd::regex txt_regex("^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])(/([0-9]|[1-2][0-9]|3[0-2]))?$");
        AZStd::string sample_input("10.85.22.92/24");
        bool match = AZStd::regex_match(sample_input, txt_regex);
        AZ_TEST_ASSERT(match);
    }

    TEST_F(Regex, MatchConstChar)
    {
        //regex
        AZ_TEST_ASSERT(AZStd::regex_match("subject", AZStd::regex("(sub)(.*)")));
    }

    TEST_F(Regex, MatchString)
    {
        AZStd::string reStr("subject");
        AZStd::regex re("(sub)(.*)");
        AZ_TEST_ASSERT(AZStd::regex_match(reStr, re));
        AZ_TEST_ASSERT(AZStd::regex_match(reStr.begin(), reStr.end(), re))
    }

    TEST_F(Regex, CMatch)
    {
        AZStd::regex re("(sub)(.*)");
        AZStd::cmatch cm;    // same as match_results<const char*> cm;
        AZStd::regex_match("subject", cm, re);
        AZ_TEST_ASSERT(cm.size() == 3);
    }

    TEST_F(Regex, SMatch)
    {
        AZStd::string reStr("subject");
        AZStd::regex re("(sub)(.*)");
        AZStd::smatch sm;    // same as std::match_results<string::const_iterator> sm;
        AZStd::regex_match(reStr, sm, re);
        AZ_TEST_ASSERT(sm.size() == 3);

        AZStd::regex_match(reStr.cbegin(), reStr.cend(), sm, re);
        AZ_TEST_ASSERT(sm.size() == 3);
    }

    TEST_F(Regex, CMatchWithFlags)
    {
        AZStd::regex re("(sub)(.*)");
        AZStd::cmatch cm;    // same as match_results<const char*> cm;
        // using explicit flags:
        AZStd::regex_match("subject", cm, re, AZStd::regex_constants::match_default);
        AZ_TEST_ASSERT(cm[0] == "subject");
        AZ_TEST_ASSERT(cm[1] == "sub");
        AZ_TEST_ASSERT(cm[2] == "ject");
    }

    TEST_F(Regex, PatternMatchFiles)
    {
        // Simple regular expression matching
        AZStd::string fnames[] = { "foo.txt", "bar.txt", "baz.dat", "zoidberg" };
        AZStd::regex txt_regex("[a-z]+\\.txt");

        for (size_t i = 0; i < AZ_ARRAY_SIZE(fnames); ++i)
        {
            if (i < 2)
            {
                AZ_TEST_ASSERT(AZStd::regex_match(fnames[i], txt_regex) == true);
            }
            else
            {
                AZ_TEST_ASSERT(AZStd::regex_match(fnames[i], txt_regex) == false);
            }
        }
    }

    TEST_F(Regex, PatternWithSingleCaptureGroup)
    {
        // Extraction of a sub-match
        AZStd::string fnames[] = { "foo.txt", "bar.txt", "baz.dat", "zoidberg" };
        AZStd::regex base_regex("([a-z]+)\\.txt");
        AZStd::smatch base_match;

        for (size_t i = 0; i < AZ_ARRAY_SIZE(fnames); ++i)
        {
            if (AZStd::regex_match(fnames[i], base_match, base_regex))
            {
                AZ_TEST_ASSERT(base_match.size() == 2);
                AZ_TEST_ASSERT(base_match[1] == "foo" || base_match[1] == "bar")
            }
        }
    }

    TEST_F(Regex, PatternWithMultipleCaptureGroups)
    {
        // Extraction of several sub-matches
        AZStd::string fnames[] = { "foo.txt", "bar.txt", "baz.dat", "zoidberg" };
        AZStd::regex pieces_regex("([a-z]+)\\.([a-z]+)");
        AZStd::smatch pieces_match;
        for (size_t i = 0; i < AZ_ARRAY_SIZE(fnames); ++i)
        {
            if (AZStd::regex_match(fnames[i], pieces_match, pieces_regex))
            {
                AZ_TEST_ASSERT(pieces_match.size() == 3);
                AZ_TEST_ASSERT(pieces_match[0] == "foo.txt" || pieces_match[0] == "bar.txt" || pieces_match[0] == "baz.dat");
                AZ_TEST_ASSERT(pieces_match[1] == "foo" || pieces_match[1] == "bar" || pieces_match[1] == "baz");
                AZ_TEST_ASSERT(pieces_match[2] == "txt" || pieces_match[2] == "dat");
            }
        }
    }

    TEST_F(Regex, WideCharTests)
    {
        //wchar_t
        AZ_TEST_ASSERT(AZStd::regex_match(L"subject", AZStd::wregex(L"(sub)(.*)")));
        AZStd::wstring reWStr(L"subject");
        AZStd::wregex reW(L"(sub)(.*)");
        AZ_TEST_ASSERT(AZStd::regex_match(reWStr, reW));
        AZ_TEST_ASSERT(AZStd::regex_match(reWStr.begin(), reWStr.end(), reW))
    }

    TEST_F(Regex, LongPatterns)
    {
        // test construction and destruction of a regex with a pattern long enough to require reallocation of buffers
        AZStd::regex longerThan16(".*\\/Presets\\/GeomCache\\/.*", AZStd::regex::flag_type::icase | AZStd::regex::flag_type::ECMAScript);
        AZStd::regex longerThan32(".*\\/Presets\\/GeomCache\\/Whatever\\/Much\\/Test\\/Very\\/Memory\\/.*", AZStd::regex::flag_type::icase);
    }

    TEST_F(Regex, SmileyFaceParseRegression)
    {
        AZStd::regex smiley(":)");

        EXPECT_TRUE(smiley.Empty());
        EXPECT_TRUE(smiley.GetError() != nullptr);
        EXPECT_FALSE(AZStd::regex_match("wut", smiley));
        EXPECT_FALSE(AZStd::regex_match(":)", smiley));
    }

    TEST_F(Regex, ParseFailure)
    {
        AZStd::regex failed(")))/?!\\$");

        EXPECT_FALSE(failed.Valid());

        AZStd::regex other = AZStd::move(failed);
        EXPECT_FALSE(other.Valid());

        AZStd::regex other2;
        other2.swap(other);
        EXPECT_TRUE(other.Empty());
        EXPECT_TRUE(other.GetError() == nullptr);
        EXPECT_FALSE(other.Valid());
        EXPECT_FALSE(other2.Valid());
    }

    TEST_F(String, ConstString)
    {
        AZStd::string_view cstr1;
        EXPECT_EQ(nullptr, cstr1.data());
        EXPECT_EQ(0, cstr1.size());
        EXPECT_EQ(0, cstr1.length());
        EXPECT_EQ(cstr1.begin(), cstr1.end());
        EXPECT_EQ(cstr1, AZStd::string_view());
        EXPECT_TRUE(cstr1.empty());

        AZStd::string_view cstr2("Test");
        EXPECT_NE(nullptr, cstr2.data());
        EXPECT_EQ(4, cstr2.size());
        EXPECT_EQ(4, cstr2.length());
        EXPECT_NE(cstr2.begin(), cstr2.end());
        EXPECT_NE(cstr2, cstr1);
        EXPECT_EQ(cstr2, AZStd::string_view("Test"));
        EXPECT_EQ(cstr2, "Test");
        EXPECT_NE(cstr2, "test");
        EXPECT_EQ(cstr2[2], 's');
        EXPECT_EQ(cstr2.at(2), 's');
        AZ_TEST_START_TRACE_SUPPRESSION;
        EXPECT_EQ(0, cstr2.at(7));
        AZ_TEST_STOP_TRACE_SUPPRESSION(1);
        EXPECT_FALSE(cstr2.empty());
        EXPECT_EQ(cstr2.data(), AZStd::string("Test"));
        EXPECT_EQ(cstr2, AZStd::string("Test"));

        AZStd::string_view cstr3 = cstr2;
        EXPECT_EQ(cstr3, cstr2);

        cstr3.swap(cstr1);
        EXPECT_EQ(cstr3, AZStd::string_view());
        EXPECT_EQ(cstr1, cstr2);

        cstr1 = {};
        EXPECT_EQ(cstr1, AZStd::string_view());
        EXPECT_EQ(0, cstr1.size());
        EXPECT_EQ(0, cstr1.length());

        AZStd::string str1("Test");
        EXPECT_EQ(cstr2, str1);
        cstr1 = str1;
        EXPECT_EQ(cstr1, cstr2);

        // check hashing
        AZStd::hash<AZStd::string_view> h;
        AZStd::size_t value = h(cstr1);
        EXPECT_NE(0, value);

        // testing empty string
        AZStd::string emptyString;
        AZStd::string_view cstr4;
        cstr4 = emptyString;
        EXPECT_NE(nullptr, cstr4.data());
        EXPECT_EQ(0, cstr4.size());
        EXPECT_EQ(0, cstr4.length());
        EXPECT_EQ(cstr4.begin(), cstr4.end());
        EXPECT_TRUE(cstr4.empty());
    }

    TEST_F(String, StringViewModifierTest)
    {
        AZStd::string_view emptyView1;
        AZStd::string_view view2("Needle in Haystack");

        // front
        EXPECT_EQ('N', view2.front());
        // back
        EXPECT_EQ('k', view2.back());

        AZStd::string findStr("Hay");
        AZStd::string_view view3(findStr);

        // copy
        const size_t destBufferSize = 32;
        char dest[destBufferSize] = { 0 };
        AZStd::size_t copyResult = view2.copy(dest, destBufferSize, 1);
        EXPECT_EQ(view2.size() - 1, copyResult);

        char assertDest[destBufferSize] = { 0 };
        AZ_TEST_START_TRACE_SUPPRESSION;
        view2.copy(assertDest, destBufferSize, view2.size() + 1);
        AZ_TEST_STOP_TRACE_SUPPRESSION(1);

        // substr
        AZStd::string_view subView2 = view2.substr(10);
        EXPECT_EQ("Haystack", subView2);
        AZ_TEST_START_TRACE_SUPPRESSION;
        [[maybe_unused]] AZStd::string_view assertSubView = view2.substr(view2.size() + 1);
        AZ_TEST_STOP_TRACE_SUPPRESSION(1);

        // compare
        AZStd::size_t compareResult = view2.compare(1, view2.size() - 1, dest, copyResult);
        EXPECT_EQ(0, compareResult);

        AZStd::string_view compareView = "Stackhay in Needle";
        compareResult = compareView.compare(view2);
        EXPECT_NE(0, compareResult);

        compareResult = compareView.compare(12, 6, view2, 0, 6);
        EXPECT_EQ(0, compareResult);

        compareResult = compareView.compare(9, 2, view2, 7, 2);
        EXPECT_EQ(0, compareResult);

        compareResult = compareView.compare("Stackhay in Needle");
        EXPECT_EQ(0, compareResult);

        // find
        AZStd::size_t findResult = view2.find(view3, 0);
        EXPECT_NE(0, findResult);
        EXPECT_EQ(10, findResult);

        findResult = compareView.find("Random String");
        EXPECT_EQ(AZStd::string_view::npos, findResult);

        findResult = view3.find('y', 2);
        EXPECT_EQ(2, findResult);

        // rfind
        AZStd::size_t rfindResult = view3.rfind('a', 2);
        EXPECT_EQ(1, rfindResult);

        rfindResult = emptyView1.rfind("");
        EXPECT_EQ(AZStd::string_view::npos, rfindResult);

        rfindResult = view2.rfind("z");
        EXPECT_EQ(AZStd::string_view::npos, rfindResult);

        // find_first_of
        AZStd::string_view repeatString = "abcdefabcfedghiabcdef";
        AZStd::size_t findFirstOfResult = repeatString.find_first_of('f');
        EXPECT_EQ(5, findFirstOfResult);

        findFirstOfResult = repeatString.find_first_of("def");
        EXPECT_EQ(3, findFirstOfResult);

        findFirstOfResult = repeatString.find_first_of("def", 6);
        EXPECT_EQ(9, findFirstOfResult);

        AZStd::string notFoundStr = "zzz";
        AZStd::string foundStr = "ghi";
        findFirstOfResult = repeatString.find_first_of(notFoundStr);
        EXPECT_EQ(AZStd::string_view::npos, findFirstOfResult);

        findFirstOfResult = repeatString.find_first_of(foundStr);
        EXPECT_EQ(12, findFirstOfResult);

        // find_last_of
        AZStd::size_t findLastOfResult = repeatString.find_last_of('f');
        EXPECT_EQ(20, findLastOfResult);

        findLastOfResult = repeatString.find_last_of("bcd");
        EXPECT_EQ(18, findLastOfResult);

        findLastOfResult = repeatString.find_last_of("bcd", 3);
        EXPECT_EQ(3, findLastOfResult);

        findLastOfResult = repeatString.find_last_of(notFoundStr);
        EXPECT_EQ(AZStd::string_view::npos, findLastOfResult);

        findLastOfResult = repeatString.find_last_of(foundStr);
        EXPECT_EQ(14, findLastOfResult);

        // find_first_not_of
        AZStd::size_t findFirstNotOfResult = repeatString.find_first_not_of('a');
        EXPECT_EQ(1, findFirstNotOfResult);

        findFirstNotOfResult = repeatString.find_first_not_of("abcdef");
        EXPECT_EQ(12, findFirstNotOfResult);

        findFirstNotOfResult = repeatString.find_first_not_of("abc", 6);
        EXPECT_EQ(9, findFirstNotOfResult);

        findFirstNotOfResult = repeatString.find_first_not_of(notFoundStr);
        EXPECT_EQ(0, findFirstNotOfResult);

        findFirstNotOfResult = repeatString.find_first_not_of(foundStr, 12);
        EXPECT_EQ(15, findFirstNotOfResult);

        // find_last_not_of
        AZStd::size_t findLastNotOfResult = repeatString.find_last_not_of('a');
        EXPECT_EQ(20, findLastNotOfResult);

        findLastNotOfResult = repeatString.find_last_not_of("abcdef");
        EXPECT_EQ(14, findLastNotOfResult);

        findLastNotOfResult = repeatString.find_last_not_of("abcf", 9);
        EXPECT_EQ(4, findLastNotOfResult);

        findLastNotOfResult = repeatString.find_last_not_of(notFoundStr);
        EXPECT_EQ(20, findLastNotOfResult);

        findLastNotOfResult = repeatString.find_last_not_of(foundStr, 14);
        EXPECT_EQ(11, findLastNotOfResult);

        // remove_prefix
        AZStd::string_view prefixRemovalView = view2;
        prefixRemovalView.remove_prefix(6);
        EXPECT_EQ(" in Haystack", prefixRemovalView);

        // remove_suffix
        AZStd::string_view suffixRemovalView = view2;
        suffixRemovalView.remove_suffix(8);
        EXPECT_EQ("Needle in ", suffixRemovalView);

        // starts_with
        EXPECT_TRUE(view2.starts_with("Needle"));
        EXPECT_TRUE(view2.starts_with('N'));
        EXPECT_TRUE(view2.starts_with(AZStd::string_view("Needle")));

        EXPECT_FALSE(view2.starts_with("Needle not"));
        EXPECT_FALSE(view2.starts_with('n'));
        EXPECT_FALSE(view2.starts_with(AZStd::string_view("Needle not")));

        // ends_with
        EXPECT_TRUE(view2.ends_with("Haystack"));
        EXPECT_TRUE(view2.ends_with('k'));
        EXPECT_TRUE(view2.ends_with(AZStd::string_view("Haystack")));

        EXPECT_FALSE(view2.ends_with("Hayqueue"));
        EXPECT_FALSE(view2.ends_with('e'));
        EXPECT_FALSE(view2.ends_with(AZStd::string_view("Hayqueue")));
    }

    TEST_F(String, StringViewCmpOperatorTest)
    {
        AZStd::string_view view1("The quick brown fox jumped over the lazy dog");
        AZStd::string_view view2("Needle in Haystack");
        AZStd::string_view emptyBeaverView;
        AZStd::string_view superEmptyBeaverView("");

        EXPECT_EQ("", emptyBeaverView);
        EXPECT_EQ("", superEmptyBeaverView);

        EXPECT_EQ("The quick brown fox jumped over the lazy dog", view1);
        EXPECT_NE("The slow brown fox jumped over the lazy dog", view1);
        EXPECT_EQ(view2, "Needle in Haystack");
        EXPECT_NE(view2, "Needle in Hayqueue");

        AZStd::string_view compareView(view2);
        EXPECT_EQ(view2, compareView);
        EXPECT_NE(view2, view1);

        AZStd::string compareStr("Busy Beaver");
        AZStd::string_view notBeaverView("Lumber Beaver");
        AZStd::string_view beaverView("Busy Beaver");
        EXPECT_EQ(compareStr, beaverView);
        EXPECT_NE(compareStr, notBeaverView);

        AZStd::string microBeaverStr("Micro Beaver");

        EXPECT_LT(view2, view1);
        EXPECT_LT(notBeaverView, "Super Lumber Beaver");
        EXPECT_LT("Disgruntled Beaver", notBeaverView);
        EXPECT_LT(notBeaverView, microBeaverStr);
        EXPECT_LT(compareStr, notBeaverView);

        EXPECT_GT(view1, view2);
        EXPECT_GT(notBeaverView, "Disgruntled Beaver");
        EXPECT_GT("Super Lumber Beaver", notBeaverView);
        EXPECT_GT(microBeaverStr, notBeaverView);
        EXPECT_GT(notBeaverView, compareStr);

        AZStd::string lowerBeaverStr("busy Beaver");
        EXPECT_LE(view2, view1);
        EXPECT_LE(compareView, compareView);
        EXPECT_LE(beaverView, "Rocket Beaver");
        EXPECT_LE(beaverView, "Busy Beaver");
        EXPECT_LE("Likable Beaver", notBeaverView);
        EXPECT_LE("Busy Beaver", beaverView);
        EXPECT_LE(microBeaverStr, view1);
        EXPECT_LE(compareStr, beaverView);

        AZStd::string bigBeaver("Big Beaver");
        EXPECT_GE(view1, view2);
        EXPECT_GE(view1, view1);
        EXPECT_GE(beaverView, "Busy Beave");
        EXPECT_GE(beaverView, "Busy Beaver");
        EXPECT_GE("Busy Beaver", beaverView);
        EXPECT_GE("Busy Beaver1", beaverView);
        EXPECT_GE(beaverView, compareStr);
        EXPECT_GE(beaverView, bigBeaver);
        EXPECT_GE(compareStr, beaverView);
        EXPECT_GE(microBeaverStr, beaverView);
    }

    TEST_F(String, String_FormatOnlyAllowsValidArgs)
    {
        constexpr bool                 v1 = false;
        constexpr char                 v2 = 0;
        constexpr unsigned char        v3 = 0;
        constexpr signed char          v4 = 0;
        constexpr wchar_t              v5 = 0;
        constexpr unsigned short       v6 = 0;
        constexpr short                v7 = 0;
        constexpr unsigned int         v8 = 0;
        constexpr int                  v9 = 0;
        constexpr unsigned long        v10 = 0;
        constexpr long                 v11 = 0;
        constexpr unsigned long long   v12 = 0;
        constexpr long long            v13 = 0;
        constexpr float                v14 = 0;
        constexpr double               v15 = 0;
        constexpr const char*          v16 = "Hello";
        constexpr const wchar_t*       v17 = L"Hello";
        constexpr void*                v18 = nullptr;

        // This shouldn't give a compile error
        AZStd::string::format(
           "%i %c %uc " AZ_TRAIT_FORMAT_STRING_PRINTF_CHAR AZ_TRAIT_FORMAT_STRING_PRINTF_WCHAR " %i %i %u %i %lu %li %llu %lli %f %f " AZ_TRAIT_FORMAT_STRING_PRINTF_STRING AZ_TRAIT_FORMAT_STRING_PRINTF_WSTRING " %p",
            v1, v2, v3, v4, v5, v6, v7, v8,  v9,  v10, v11, v12,  v13,  v14, v15, v16, v17, v18);

        // This shouldn't give a compile error
        AZStd::wstring::format(
          L"%i %c %uc " AZ_TRAIT_FORMAT_STRING_WPRINTF_CHAR AZ_TRAIT_FORMAT_STRING_WPRINTF_WCHAR " %i %i %u %i %lu %li %llu %lli %f %f " AZ_TRAIT_FORMAT_STRING_WPRINTF_STRING AZ_TRAIT_FORMAT_STRING_WPRINTF_WSTRING " %p",
            v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16, v17, v18);

        class WrappedInt
        {
            [[maybe_unused]] int val;
        };

        using ValidFormatArg = AZStd::string::_Format_Internal::ValidFormatArg;

        static_assert(AZStd::is_convertible_v<decltype(v1),  ValidFormatArg>, "Should be valid format argument");
        static_assert(AZStd::is_convertible_v<decltype(v2),  ValidFormatArg>, "Should be valid format argument");
        static_assert(AZStd::is_convertible_v<decltype(v3),  ValidFormatArg>, "Should be valid format argument");
        static_assert(AZStd::is_convertible_v<decltype(v4),  ValidFormatArg>, "Should be valid format argument");
        static_assert(AZStd::is_convertible_v<decltype(v5),  ValidFormatArg>, "Should be valid format argument");
        static_assert(AZStd::is_convertible_v<decltype(v7),  ValidFormatArg>, "Should be valid format argument");
        static_assert(AZStd::is_convertible_v<decltype(v8),  ValidFormatArg>, "Should be valid format argument");
        static_assert(AZStd::is_convertible_v<decltype(v9),  ValidFormatArg>, "Should be valid format argument");
        static_assert(AZStd::is_convertible_v<decltype(v10), ValidFormatArg>, "Should be valid format argument");
        static_assert(AZStd::is_convertible_v<decltype(v11), ValidFormatArg>, "Should be valid format argument");
        static_assert(AZStd::is_convertible_v<decltype(v12), ValidFormatArg>, "Should be valid format argument");
        static_assert(AZStd::is_convertible_v<decltype(v13), ValidFormatArg>, "Should be valid format argument");
        static_assert(AZStd::is_convertible_v<decltype(v14), ValidFormatArg>, "Should be valid format argument");
        static_assert(AZStd::is_convertible_v<decltype(v15), ValidFormatArg>, "Should be valid format argument");
        static_assert(AZStd::is_convertible_v<decltype(v16), ValidFormatArg>, "Should be valid format argument");
        static_assert(AZStd::is_convertible_v<decltype(v17), ValidFormatArg>, "Should be valid format argument");
        static_assert(AZStd::is_convertible_v<decltype(v18), ValidFormatArg>, "Should be valid format argument");

        static_assert(!AZStd::is_convertible_v<AZStd::string, ValidFormatArg>, "AZStd::string shouldn't be a valid format argument");
        static_assert(!AZStd::is_convertible_v<std::string, ValidFormatArg>, "std::string shouldn't be a valid format argument");
        static_assert(!AZStd::is_convertible_v<AZStd::wstring, ValidFormatArg>, "AZStd::wstring shouldn't be a valid format argument");
        static_assert(!AZStd::is_convertible_v<std::wstring, ValidFormatArg>, "std::wstring shouldn't be a valid format argument");
        static_assert(!AZStd::is_convertible_v<WrappedInt, ValidFormatArg>, "WrappedInt shouldn't be a valid format argument");
        static_assert(!AZStd::is_convertible_v<AZStd::string_view, ValidFormatArg>, "AZStd::string_view shouldn't be a valid format argument");
        static_assert(!AZStd::is_convertible_v<AZStd::wstring_view, ValidFormatArg>, "AZStd::wstring_view shouldn't be a valid format argument");
        static_assert(!AZStd::is_convertible_v<std::string_view, ValidFormatArg>, "string_view shouldn't be a valid format argument");
        static_assert(!AZStd::is_convertible_v<std::wstring_view, ValidFormatArg>, "wstring_view shouldn't be a valid format argument");
    }

    TEST_F(String, StringViewPrintf)
    {
        AZStd::string s = "This is a long string";
        AZStd::string_view view0 = "";
        AZStd::string_view view1 = s;
        AZStd::string_view view2{&s[10], 4};

        AZStd::string result;

        result = AZStd::string::format("%s %.*s %s", "[", AZ_STRING_ARG(view0), "]");
        EXPECT_EQ(AZStd::string{"[  ]"}, result);

        result = AZStd::string::format("%s %.*s %s", "[", AZ_STRING_ARG(view1), "]");
        EXPECT_EQ(AZStd::string{"[ This is a long string ]"}, result);

        result = AZStd::string::format("%s %.*s %s", "[", AZ_STRING_ARG(view2), "]");
        EXPECT_EQ(AZStd::string{"[ long ]"}, result);

        result = AZStd::string::format("%s %.*s %s", "[", AZ_STRING_ARG(s), "]");
        EXPECT_EQ(AZStd::string{"[ This is a long string ]"}, result);

        // Testing AZ_STRING_FORMATTER too
        result = AZStd::string::format("%s" AZ_STRING_FORMAT "%s", "[", AZ_STRING_ARG(view2), "]");
        EXPECT_EQ(AZStd::string{"[long]"}, result);

        // Test the AZ_TRAIT_FORMAT_STRING_WPRINTF_* variants for wstrings
        constexpr AZStd::wstring_view wideView = L"This is a long string";
        AZStd::wstring wideResult = AZStd::wstring::format(AZ_TRAIT_FORMAT_STRING_WPRINTF_STRING_WITH_SIZE, AZ_STRING_ARG(view1));
        EXPECT_EQ(wideView, wideResult);

        wideResult = AZStd::wstring::format(AZ_TRAIT_FORMAT_STRING_WPRINTF_WSTRING_WITH_SIZE, AZ_STRING_ARG(wideView));
        EXPECT_EQ(wideView, wideResult);
    }

    template<typename T>
    class BasicStringViewConstexprFixture
        : public LeakDetectionFixture
    {};

    using StringViewElementTypes = ::testing::Types<char, wchar_t>;
    TYPED_TEST_CASE(BasicStringViewConstexprFixture, StringViewElementTypes);
    TYPED_TEST(BasicStringViewConstexprFixture, StringView_DefaultConstructorsIsConstexpr)
    {
        constexpr AZStd::basic_string_view<TypeParam> defaultView1;
        constexpr AZStd::basic_string_view<TypeParam> defaultView2;
        static_assert(defaultView1 == defaultView2, "string_view constructor should be constexpr");
    }

    TYPED_TEST(BasicStringViewConstexprFixture, StringView_CharTConstructorsAreConstexpr)
    {
        // null terminated compile time string
        constexpr const TypeParam* compileTimeString = []() constexpr -> const TypeParam*
        {
            if constexpr (AZStd::is_same_v<TypeParam, char>)
            {
                return "HelloWorld\0";
            }
            else if constexpr (AZStd::is_same_v<TypeParam, wchar_t>)
            {
                return L"HelloWorld\0";
            }

            return {};
        }();
        constexpr AZStd::basic_string_view<TypeParam> charTView1(compileTimeString);
        static_assert(charTView1.size() == 10, "string_view constructor should be constexpr");
        // non-null terminated compile time string
        constexpr const TypeParam* compileTimeString2 = []() constexpr -> const TypeParam*
        {
            if constexpr (AZStd::is_same_v<TypeParam, char>)
            {
                return "GoodbyeWorld";
            }
            else if constexpr (AZStd::is_same_v<TypeParam, wchar_t>)
            {
                return L"GoodbyeWorld";
            }

            return {};
        }();
        constexpr AZStd::basic_string_view<TypeParam> charTViewWithLength(compileTimeString2, 7);
        static_assert(charTViewWithLength.size() == 7, "string_view constructor should be constexpr");
    }

    TYPED_TEST(BasicStringViewConstexprFixture, StringView_CopyConstructorsIsConstexpr)
    {
        // null terminated compile time string
        constexpr const TypeParam* compileTimeString = []() constexpr-> const TypeParam*
        {
            if constexpr (AZStd::is_same_v<TypeParam, char>)
            {
                return "HelloWorld\0";
            }
            else if constexpr (AZStd::is_same_v<TypeParam, wchar_t>)
            {
                return L"HelloWorld\0";
            }

            return {};
        }();
        constexpr AZStd::basic_string_view<TypeParam> copyView1(compileTimeString);
        constexpr AZStd::basic_string_view<TypeParam> copyView2(copyView1);
        static_assert(copyView1 == copyView2, "string_view constructor should be constexpr");
    }

    TYPED_TEST(BasicStringViewConstexprFixture, StringView_AssignmentOperatorIsConstexpr)
    {
        // null terminated compile time string
        constexpr const TypeParam* compileTimeString1 = []() constexpr-> const TypeParam*
        {
            if constexpr (AZStd::is_same_v<TypeParam, char>)
            {
                return "HelloWorld\0";
            }
            else if constexpr (AZStd::is_same_v<TypeParam, wchar_t>)
            {
                return L"HelloWorld\0";
            }

            return {};
        }();
        constexpr AZStd::basic_string_view<TypeParam> assignView1(compileTimeString1);
        auto assignment_test_func = [](AZStd::basic_string_view<TypeParam> sourceView) constexpr -> AZStd::basic_string_view<TypeParam>
        {
            constexpr const TypeParam* const compileTimeString2 = []() constexpr-> const TypeParam*
            {
                if constexpr (AZStd::is_same_v<TypeParam, char>)
                {
                    return "GoodbyeWorld\0";
                }
                else if constexpr (AZStd::is_same_v<TypeParam, wchar_t>)
                {
                    return L"GoodbyeWorld\0";
                }

                return {};
            }();
            AZStd::basic_string_view<TypeParam> assignView2(compileTimeString2);
            assignView2 = sourceView;
            return assignView2;
        };

        static_assert(assignment_test_func(assignView1) == assignView1, "The assigned string_view should compare equal to the original");
    }

    TYPED_TEST(BasicStringViewConstexprFixture, StringView_IteratorsAreConstexpr)
    {
        // null terminated compile time string
        constexpr const TypeParam* compileTimeString1 = []() constexpr-> const TypeParam*
        {
            if constexpr (AZStd::is_same_v<TypeParam, char>)
            {
                return "HelloWorld\0";
            }
            else if constexpr (AZStd::is_same_v<TypeParam, wchar_t>)
            {
                return L"HelloWorld\0";
            }

            return {};
        }();
        constexpr AZStd::basic_string_view<TypeParam> iteratorView(compileTimeString1);
        constexpr typename AZStd::basic_string_view<TypeParam>::iterator beginIt = iteratorView.begin();
        constexpr typename AZStd::basic_string_view<TypeParam>::const_iterator cbeginIt = iteratorView.cbegin();
        constexpr typename AZStd::basic_string_view<TypeParam>::iterator endIt = iteratorView.end();
        constexpr typename AZStd::basic_string_view<TypeParam>::const_iterator cendIt = iteratorView.cend();
        constexpr typename AZStd::basic_string_view<TypeParam>::reverse_iterator rbeginIt = iteratorView.rbegin();
        constexpr typename AZStd::basic_string_view<TypeParam>::const_reverse_iterator crbeginIt = iteratorView.crbegin();
        constexpr typename AZStd::basic_string_view<TypeParam>::reverse_iterator rendIt = iteratorView.rend();
        constexpr typename AZStd::basic_string_view<TypeParam>::const_reverse_iterator crendIt = iteratorView.crend();
        static_assert(beginIt != endIt, "begin and iterators should be different");
        static_assert(cbeginIt != cendIt, "begin and iterators should be different");
        static_assert(rbeginIt != rendIt, "begin and iterators should be different");
        static_assert(crbeginIt != crendIt, "begin and iterators should be different");

        static_assert(AZStd::begin(iteratorView) != AZStd::end(iteratorView), "non-member begin and end functions should return different iterators");
    }

    TYPED_TEST(BasicStringViewConstexprFixture, StringView_AccessOperatorsAreConstexpr)
    {
        // null terminated compile time string
        constexpr const TypeParam* compileTimeString1 = []() constexpr-> const TypeParam*
        {
            if constexpr (AZStd::is_same_v<TypeParam, char>)
            {
                return "HelloWorld\0";
            }
            else if constexpr (AZStd::is_same_v<TypeParam, wchar_t>)
            {
                return L"HelloWorld\0";
            }

            return {};
        }();
        constexpr AZStd::basic_string_view<TypeParam> elementView1(compileTimeString1);
        static_assert(elementView1[4] == 'o', "character at index 4 in string_view should be 'o'");
        static_assert(elementView1.at(5) == 'W', "character at index 5 in string_view should be 'W'");
    }

    TYPED_TEST(BasicStringViewConstexprFixture, StringView_FrontAndBackAreConstexpr)
    {
        // null terminated compile time string
        constexpr const TypeParam* compileTimeString1 = []() constexpr-> const TypeParam*
        {
            if constexpr (AZStd::is_same_v<TypeParam, char>)
            {
                return "HelloWorld\0";
            }
            else if constexpr (AZStd::is_same_v<TypeParam, wchar_t>)
            {
                return L"HelloWorld\0";
            }

            return {};
        }();
        constexpr AZStd::basic_string_view<TypeParam> elementView1(compileTimeString1);
        static_assert(elementView1.front() == 'H', "Fourth character in string_view should be 'H'");
        static_assert(elementView1.back() == 'd', "Fifth character in string_view should be 'd'");
    }

    TYPED_TEST(BasicStringViewConstexprFixture, StringView_DataIsConstexpr)
    {
        // null terminated compile time string
        constexpr const TypeParam* compileTimeString1 = []() constexpr-> const TypeParam*
        {
            if constexpr (AZStd::is_same_v<TypeParam, char>)
            {
                return "HelloWorld\0";
            }
            else if constexpr (AZStd::is_same_v<TypeParam, wchar_t>)
            {
                return L"HelloWorld\0";
            }

            return {};
        }();
        constexpr const TypeParam* compileTimeString2 = []() constexpr-> const TypeParam*
        {
            if constexpr (AZStd::is_same_v<TypeParam, char>)
            {
                return "OthelloWorld\0";
            }
            else if constexpr (AZStd::is_same_v<TypeParam, wchar_t>)
            {
                return L"OthelloWorld\0";
            }

            return {};
        }();
        static constexpr AZStd::basic_string_view<TypeParam> elementView1(compileTimeString1);
        static constexpr AZStd::basic_string_view<TypeParam> elementView2(compileTimeString2);
        static_assert(elementView1.data(), "string_view.data() should be non-nullptr");
        static_assert(elementView2.data(), "string_view.data() should be non-nullptr");
    }

    TYPED_TEST(BasicStringViewConstexprFixture, StringView_SizeOperatorsConstexpr)
    {
        // null terminated compile time string
        constexpr const TypeParam* compileTimeString1 = []() constexpr-> const TypeParam*
        {
            if constexpr (AZStd::is_same_v<TypeParam, char>)
            {
                return "HelloWorld\0";
            }
            else if constexpr (AZStd::is_same_v<TypeParam, wchar_t>)
            {
                return L"HelloWorld\0";
            }

            return {};
        }();
        constexpr AZStd::basic_string_view<TypeParam> sizeView1(compileTimeString1);
        static_assert(sizeView1.size() == sizeView1.length(), "string_views size and length function should return the same value");
        static_assert(!sizeView1.empty(), "string_views should not be empty");
        static_assert(sizeView1.max_size() != 0, "string_views max_size should be greater than 0");
    }

    TEST_F(String, StringView_ModifiersAreConstexpr)
    {
        using TypeParam = char;
        // null terminated compile time string
        [[maybe_unused]] auto MakeCompileTimeString1 = []() constexpr -> const TypeParam*
        {
            return "HelloWorld";
        };
        constexpr AZStd::basic_string_view<TypeParam> modifierView("HelloWorld");
        // A constexpr lambda is used to evaluate non constexpr string_view instances' member functions which
        // have been marked as constexpr at compile time
        // The google test function being run is not a constexpr function and therefore will evaulate
        // non-constexpr string_view variables at runtime. This would cause static_assert to state
        // that the expression is evaluated at runtime
        auto remove_prefix_test_func = [](AZStd::basic_string_view<TypeParam> sourceView) constexpr -> AZStd::basic_string_view<TypeParam>
        {
            AZStd::basic_string_view<TypeParam> lstripView(sourceView);
            lstripView.remove_prefix(5);
            return lstripView;
        };
        auto remove_suffix_test_func = [](AZStd::basic_string_view<TypeParam> sourceView) constexpr -> AZStd::basic_string_view<TypeParam>
        {
            AZStd::basic_string_view<TypeParam> rstripView(sourceView);
            rstripView.remove_suffix(5);
            return rstripView;
        };

        static_assert(remove_prefix_test_func(modifierView) == "World", "string_view should compare equal to World");
        static_assert(remove_suffix_test_func(modifierView) == "Hello", "string_view should compare equal to Hello");
    }

    TEST_F(String, StringView_SubstrIsConstexpr)
    {
        using TypeParam = char;
        auto MakeCompileTimeString1 = []() constexpr -> const TypeParam*
        {
            return "HelloWorld";
        };
        constexpr const TypeParam* compileTimeString1 = MakeCompileTimeString1();;
        constexpr AZStd::basic_string_view<TypeParam> fullView(compileTimeString1);
        auto substr_test_func = [](AZStd::basic_string_view<TypeParam> sourceView) constexpr -> AZStd::basic_string_view<TypeParam>
        {
            return sourceView.substr(3, 5);
        };

        static_assert(substr_test_func(fullView) == "loWor", "string_view substring should result in string \"lloWo\"");
    }

    TEST_F(String, StringView_StartsAndEndsWithAreConstexpr)
    {
        using TypeParam = char;
        auto MakeCompileTimeString1 = []() constexpr -> const TypeParam*
        {
            return "elloGovernor";
        };
        constexpr const TypeParam* compileTimeString1 = MakeCompileTimeString1();
        constexpr AZStd::basic_string_view<TypeParam> withView(compileTimeString1);
        static_assert(withView.starts_with("ello"), "string_view should start with \"ello\"");
        // Regression in VS2017 15.8 and 15.9 where __builtin_memcmp fails in valid checks
#if AZ_COMPILER_MSVC < 1915 && AZ_COMPILER_MSVC > 1916
        static_assert(withView.ends_with("Governor"), "string_view should end with \"Governor\"");
#endif
    }

    template<typename> constexpr const char* MakeCompileTimeString1 ="the quick brown fox jumped over the lazy dog";
    template<> constexpr const wchar_t* MakeCompileTimeString1<wchar_t> = L"the quick brown fox jumped over the lazy dog";
    template<typename> constexpr const char* MakeSearchString = "o";
    template<> constexpr const wchar_t* MakeSearchString<wchar_t> = L"o";
    template<typename> constexpr const char* MakeTestString1 = "fox";
    template<> constexpr const wchar_t* MakeTestString1<wchar_t> = L"fox";
    template<typename> constexpr const char* MakeTestString2 = "the";
    template<> constexpr const wchar_t* MakeTestString2<wchar_t> = L"the";
    template<typename> constexpr const char* MakeTestString3 = "browning";
    template<> constexpr const wchar_t* MakeTestString3<wchar_t> = L"browning";
    template<typename> constexpr const char* MakeTestString4 = "e";
    template<> constexpr const wchar_t* MakeTestString4<wchar_t> = L"e";
    template<typename> constexpr const char* MakeTestString5 = "dino";
    template<> constexpr const wchar_t* MakeTestString5<wchar_t> = L"dino";
    template<typename> constexpr const char* MakeTestString6 = "eh ";
    template<> constexpr const wchar_t* MakeTestString6<wchar_t> = L"eh ";
    template<typename> constexpr const char* MakeTestString7 = "eh";
    template<> constexpr const wchar_t* MakeTestString7<wchar_t> = L"eh";
    template<typename> constexpr const char* MakeTestString8 = "cat";
    template<> constexpr const wchar_t* MakeTestString8<wchar_t> = L"cat";
    template<typename> constexpr const char* MakeTestString9 = "the ";
    template<> constexpr const wchar_t* MakeTestString9<wchar_t> = L"the ";
    template<typename> constexpr const char* MakeTestString10 = "dog ";
    template<> constexpr const wchar_t* MakeTestString10<wchar_t> = L"dog ";

    TYPED_TEST(BasicStringViewConstexprFixture, StringView_FindOperationsAreConstexpr)
    {
        constexpr const TypeParam* compileTimeString1 = MakeCompileTimeString1<TypeParam>;
        constexpr AZStd::basic_string_view<TypeParam> quickFoxView(compileTimeString1);
        constexpr const TypeParam* searchString = MakeSearchString<TypeParam>;
        constexpr AZStd::basic_string_view<TypeParam> searchView(searchString);

        constexpr const TypeParam* testString1 = MakeTestString1<TypeParam>;
        constexpr const TypeParam* testString2 = MakeTestString2<TypeParam>;
        constexpr const TypeParam* testString3 = MakeTestString3<TypeParam>;
        constexpr const TypeParam* testString4 = MakeTestString4<TypeParam>;
        constexpr const TypeParam* testString5 = MakeTestString5<TypeParam>;
        constexpr const TypeParam* testString6 = MakeTestString6<TypeParam>;
        constexpr const TypeParam* testString7 = MakeTestString7<TypeParam>;
        constexpr const TypeParam* testString8 = MakeTestString8<TypeParam>;
        constexpr const TypeParam* testString9 = MakeTestString9<TypeParam>;
        constexpr const TypeParam* testString10 = MakeTestString10<TypeParam>;
        // find test
        static_assert(quickFoxView.find(searchView) == 12, "string_view find should result in index 12");
        static_assert(quickFoxView.find('q') == 4, "string_view find should result in index 4");
        static_assert(quickFoxView.find(testString1) == 16, "string_view find should result in index 16");
        static_assert(quickFoxView.find(testString2, 3) == 32, "string_view find should result in index 32");
        static_assert(quickFoxView.find(testString3, 0, 5) == 10, "string_view find should result in index 10");
        // rfind test
        static_assert(quickFoxView.rfind(searchView) == 42, "string_view rfind should result in index 42");
        static_assert(quickFoxView.rfind('o') == 42, "string_view rfind should result in index 42");
        static_assert(quickFoxView.rfind(testString2) == 32, "string_view rfind should result in index 32");
        static_assert(quickFoxView.rfind(testString4, 32) == 29, "string_view rfind should result in index 29");
        static_assert(quickFoxView.rfind(testString5, 40, 1) == 25, "string_view rfind should result in index 25");

        // find_first_of test
        static_assert(quickFoxView.find_first_of(searchView) == 12, "string_view find_first_of_test should result in index 12");
        static_assert(quickFoxView.find_first_of('o') == 12, "string_view find_first_of should result in index 12");
        static_assert(quickFoxView.find_first_of(testString6) == 1, "string_view find_first_of should result in index 1");
        static_assert(quickFoxView.find_first_of(testString7, 6) == 24, "string_view find_first_of should result in index 24");
        static_assert(quickFoxView.find_first_of(testString8, 0, 1) == 7, "string_view find_first_of should result in index 7");

        // find_last_of test
        static_assert(quickFoxView.find_last_of(searchView) == 42, "string_view find_last_of_test should result in index 42");
        static_assert(quickFoxView.find_last_of('o') == 42, "string_view find_last_of should result in index 42");
        static_assert(quickFoxView.find_last_of(testString6) == 40, "string_view find_last_of should result in index 40");
        static_assert(quickFoxView.find_last_of(testString7, 31) == 29, "string_view find_last_of should result in index 29");
        static_assert(quickFoxView.find_last_of(testString8, AZStd::basic_string_view<TypeParam>::npos, 1) == 7, "string_view find_last_of should result in index 7");

        // find_first_not_of test
        constexpr AZStd::basic_string_view<TypeParam> firstNotOfView(testString9);
        static_assert(quickFoxView.find_first_not_of(firstNotOfView) == 4, "string_view find_first_not_of should result in index 0");
        static_assert(quickFoxView.find_first_not_of('t') == 1, "string_view find_first_not_of should result in index 1");
        static_assert(quickFoxView.find_first_not_of(testString9) == 4, "string_view find_first_not_of should result in index 4");
        static_assert(quickFoxView.find_first_not_of(testString9, 31) == 36, "string_view find_first_not_of should result in index 36");
        static_assert(quickFoxView.find_first_not_of(testString9, 0, 1) == 1, "string_view find_first_not_of should result in index 1");

        // find_last_not_of test
        constexpr AZStd::basic_string_view<TypeParam> lastNotOfView(testString10);
        static_assert(quickFoxView.find_last_not_of(lastNotOfView) == 39, "string_view find_last_not_of should result in index 39");
        static_assert(quickFoxView.find_last_not_of('g') == 42, "string_view find_last_not_of should result in index 42");
        static_assert(quickFoxView.find_last_not_of(testString10) == 39, "string_view find_last_not_of should result in index 39");
        static_assert(quickFoxView.find_last_not_of(testString10, 27) == 24, "string_view find_last_not_of should result in index 24");
        static_assert(quickFoxView.find_last_not_of(testString10, AZStd::basic_string_view<TypeParam>::npos, 1) == 43, "string_view find_last_not_of should result in index 43");
    }

    TEST_F(String, StringView_CompareIsConstexpr)
    {
        using TypeParam = char;
        auto ThisTestMakeCompileTimeString1 = []() constexpr -> const TypeParam*
        {
            return "HelloWorld";
        };
        auto MakeCompileTimeString2 = []() constexpr -> const TypeParam*
        {
            return "HelloPearl";
        };
        constexpr const TypeParam* compileTimeString1 = ThisTestMakeCompileTimeString1();
        constexpr const TypeParam* compileTimeString2 = MakeCompileTimeString2();
        constexpr AZStd::basic_string_view<TypeParam> lhsView(compileTimeString1);
        constexpr AZStd::basic_string_view<TypeParam> rhsView(compileTimeString2);
        static_assert(lhsView.compare(rhsView) > 0, R"("HelloWorld" > "HelloPearl")");
        static_assert(lhsView.compare(0, 5, rhsView) < 0, R"("Hello" < HelloPearl")");
        static_assert(lhsView.compare(2, 3, rhsView, 2, 3) == 0, R"("llo" == llo")");
        static_assert(lhsView.compare("Hello") > 0, R"("HelloWorld" > Hello")");
        static_assert(lhsView.compare(0, 5, "Hello") == 0, R"("Hello" == Hello")");
        static_assert(lhsView.compare(0, 5, "HelloTheorello", 5) == 0, R"("Hello" == Hello")");
    }

    TEST_F(String, StringView_CompareOperatorsAreConstexpr)
    {
        using TypeParam = char;
        auto TestMakeCompileTimeString1 = []() constexpr -> const TypeParam*
        {
            return "HelloWorld";
        };
        constexpr const TypeParam* compileTimeString1 = TestMakeCompileTimeString1();
        constexpr AZStd::basic_string_view<TypeParam> compareView(compileTimeString1);
        static_assert(compareView == "HelloWorld", "string_view operator== comparison has failed");
        static_assert(compareView != "MadWorld", "string_view operator!= comparison has failed");
        static_assert(compareView < "JelloWorld", "string_view operator< comparison has failed");
        static_assert("MelloWorld" > compareView, "string_view operator> comparison has failed");
        static_assert(compareView <= "HelloWorld", "string_view operator== comparison has failed");
        static_assert(compareView >= "HelloWorld", "string_view operator== comparison has failed");
    }

    TYPED_TEST(BasicStringViewConstexprFixture, StringView_SwapIsConstexpr)
    {
        auto swap_test_func = []() constexpr -> AZStd::basic_string_view<TypeParam>
        {
            constexpr auto ThisTestMakeCompileTimeString1 = []() constexpr -> const TypeParam*
            {
                if constexpr (AZStd::is_same_v<TypeParam, char>)
                {
                    return "NekuWorld";
                }
                else
                {
                    return L"NekuWorld";
                }
            };
            constexpr auto MakeCompileTimeString2 = []() constexpr -> const TypeParam*
            {
                if constexpr (AZStd::is_same_v<TypeParam, char>)
                {
                    return "InuWorld";
                }
                else
                {
                    return L"InuWorld";
                }
            };
            constexpr const TypeParam* compileTimeString1 = ThisTestMakeCompileTimeString1();
            constexpr const TypeParam* compileTimeString2 = MakeCompileTimeString2();
            AZStd::basic_string_view<TypeParam> lhsView(compileTimeString1);
            AZStd::basic_string_view<TypeParam> rhsView(compileTimeString2);
            lhsView.swap(rhsView);
            return lhsView;
        };

        constexpr auto MakeCompileTimeString3 = []() constexpr -> const TypeParam*
        {
            if constexpr (AZStd::is_same_v<TypeParam, char>)
            {
                return "InuWorld";
            }
            else
            {
                return L"InuWorld";
            }
        };
        static_assert(swap_test_func() == MakeCompileTimeString3(), R"(string_view swap should have swapped around "NekuWorld" and "InuWorld")");
    }

    TYPED_TEST(BasicStringViewConstexprFixture, HashString_FunctionIsConstexpr)
    {
        auto ThisTestMakeCompileTimeString1 = []() constexpr -> const TypeParam*
        {
            if constexpr (AZStd::is_same_v<TypeParam, char>)
            {
                return "HelloWorld";
            }
            else
            {
                return L"HelloWorld";
            }
        };
        constexpr const TypeParam* compileTimeString1 = ThisTestMakeCompileTimeString1();
        constexpr AZStd::basic_string_view<TypeParam> hashView(compileTimeString1);
        constexpr size_t compileHash = AZStd::hash<AZStd::basic_string_view<TypeParam>>{}(hashView);
        static_assert(compileHash != 0, "Hash of \"HelloWorld\" should not be 0");
    }

    TEST_F(String, StringView_UserLiteralsSucceed)
    {
        using namespace AZStd::string_view_literals;
        constexpr auto charView{ "Test"_sv };
        constexpr auto wcharView{ L"Super Test"_sv };
        static_assert(charView == "Test", "char string literal should be \"Test\"");
        static_assert(wcharView == L"Super Test", "char string literal should be \"Super Test\"");
    }

    TEST_F(String, FixedString_ConstructorsAreConstexpr_Succeeds)
    {
        constexpr AZStd::fixed_string<128> test1;
        constexpr AZStd::fixed_string<128> test2(static_cast<size_t>(5), 'm');
        constexpr AZStd::fixed_string<128> test3{ test2, 2, 2 };
        constexpr AZStd::fixed_string<128> test4{ "World", 3 };
        constexpr AZStd::fixed_string<128> test5{ "World" };
        constexpr AZStd::array<int, 5> testView{ 'H', 'e', 'l', 'l', 'o' };
        constexpr AZStd::fixed_string<128> test6{ testView.begin(), testView.end() };
        constexpr AZStd::fixed_string<128> test7{ test4 };
        constexpr AZStd::fixed_string<128> test8{ AZStd::fixed_string<128>{ "MoveTheWorld"} };
        constexpr AZStd::fixed_string<128> test9{ {'O', 'r', 'a', 'n', 'g', 'e'} };
        constexpr AZStd::fixed_string<128> test10{ AZStd::string_view{"BozBox" } };
        constexpr AZStd::fixed_string<128> test11{ AZStd::string_view{"BozBox"}, 2, 3 };

        static_assert(test1.empty());
        static_assert(test2 == "mmmmm");
        static_assert(test3 == "mm");
        static_assert(test4 == "Wor");
        static_assert(test5 == "World");
        static_assert(test6 == "Hello");
        static_assert(test7 == "Wor");
        static_assert(test8 == "MoveTheWorld");
        static_assert(test9 == "Orange");
        static_assert(test10 == "BozBox");
        static_assert(test11 == "zBo");
    }

    TEST_F(String, FixedString_OperatorPlusIsConstexpr_Succeeds)
    {
        constexpr AZStd::fixed_string<128> test1{ "Hello" };
        constexpr AZStd::fixed_string<128> test2{ "World" };
        static_assert((test1 + test2) == "HelloWorld");
        static_assert(("Mello" + test2) == "MelloWorld");
        static_assert((test1 + "Curl") == "HelloCurl");
        static_assert(('F' + test2) == "FWorld");
        static_assert((test1 + 'Z') == "HelloZ");
        static_assert((AZStd::fixed_string<128>{"Chello"} + AZStd::fixed_string<128>{"Play"}) == "ChelloPlay");
        static_assert((AZStd::fixed_string<128>{"Chello"} + test2) == "ChelloWorld");
        static_assert((AZStd::fixed_string<128>{"Chello"} + "Play") == "ChelloPlay");
        static_assert((AZStd::fixed_string<128>{"Chello"} + 'P') == "ChelloP");
        static_assert((test1 + AZStd::fixed_string<128>{"Chello"}) == "HelloChello");
        static_assert(("Mellow" + AZStd::fixed_string<128>{"Chello"}) == "MellowChello");
        static_assert(('M' + AZStd::fixed_string<128>{"Chello"}) == "MChello");
    }

    TEST_F(String, FixedString_AppendIsConstexpr_Succeeds)
    {
        constexpr AZStd::fixed_string<128> test1{ "Hello" };
        constexpr AZStd::fixed_string<128> test2{ AZStd::fixed_string<128>{}.append(test1) };
        constexpr AZStd::fixed_string<128> test3{ AZStd::fixed_string<128>{}.append("Brown") };
        constexpr AZStd::fixed_string<128> test4{ AZStd::fixed_string<128>{ "App" }.append(AZStd::string_view("Blue")) };
        constexpr AZStd::string_view redView("Red");
        constexpr AZStd::fixed_string<128> test5{ AZStd::fixed_string<128>{ "App" }.append(redView.begin(), redView.end()) };
        constexpr AZStd::fixed_string<128> test6{ AZStd::fixed_string<128>{ "App" }.append(5, 'X') };
        constexpr AZStd::fixed_string<128> test7{ AZStd::fixed_string<128>{ "App" }.append("Green", 2) };
        static_assert(test2 == "Hello");
        static_assert(test3 == "Brown");
        static_assert(test4 == "AppBlue");
        static_assert(test5 == "AppRed");
        static_assert(test6 == "AppXXXXX");
        static_assert(test7 == "AppGr");
    }

    TEST_F(String, FixedString_AssignIsConstexpr_Succeeds)
    {
        constexpr AZStd::fixed_string<128> test1{ "Hello" };
        constexpr AZStd::fixed_string<128> test2{ AZStd::fixed_string<128>{}.assign(test1) };
        constexpr AZStd::fixed_string<128> test3{ AZStd::fixed_string<128>{}.assign("Brown") };
        constexpr AZStd::fixed_string<128> test4{ AZStd::fixed_string<128>{ "App" }.assign(AZStd::string_view("Blue")) };
        constexpr AZStd::string_view redView("Red");
        constexpr AZStd::fixed_string<128> test5{ AZStd::fixed_string<128>{ "App" }.assign(redView.begin(), redView.end()) };
        constexpr AZStd::fixed_string<128> test6{ AZStd::fixed_string<128>{ "App" }.assign(5, 'X') };
        constexpr AZStd::fixed_string<128> test7{ AZStd::fixed_string<128>{ "App" }.assign("GreenMile", 5) };
        constexpr AZStd::fixed_string<128> testAssignFromEmptyStringView{ AZStd::fixed_string<128>{ "App" }.assign(AZStd::string_view{}) };
        static_assert(test2 == "Hello");
        static_assert(test3 == "Brown");
        static_assert(test4 == "Blue");
        static_assert(test5 == "Red");
        static_assert(test6 == "XXXXX");
        static_assert(test7 == "Green");
        static_assert(testAssignFromEmptyStringView == "");
    }

    TEST_F(String, FixedString_InsertIsConstexpr_Succeeds)
    {
        constexpr AZStd::fixed_string<128> test1{ "Hello" };
        constexpr AZStd::fixed_string<128> test2{ AZStd::fixed_string<128>{}.insert(0, test1) };
        constexpr AZStd::fixed_string<128> test3{ AZStd::fixed_string<128>{}.insert(0, "Brown") };
        constexpr AZStd::fixed_string<128> test4{ AZStd::fixed_string<128>{ "App" }.insert(0, AZStd::string_view("Blue")) };
        constexpr AZStd::fixed_string<128> test5{ AZStd::fixed_string<128>{ "App" }.insert(0, test1, 2, 2) };
        constexpr AZStd::fixed_string<128> test6{ AZStd::fixed_string<128>{ "App" }.insert(size_t(0), 5, 'X') };
        constexpr AZStd::fixed_string<128> test7{ AZStd::fixed_string<128>{ "App" }.insert(0, "GreenTea", 5) };
        auto MakeFixedStringWithInsertWithIteratorPos1 = []() constexpr
        {
            AZStd::fixed_string<128> bufferString;
            AZStd::array testString{ 'O', 'r', 'a', 'n', 'g', 'e' };
            bufferString.insert(bufferString.end(), testString.begin(), testString.end());
            return bufferString;
        };
        constexpr AZStd::fixed_string<128> test8{ MakeFixedStringWithInsertWithIteratorPos1() };
        auto MakeFixedStringWithInsertWithIteratorPos2 = []() constexpr
        {
            AZStd::fixed_string<128> bufferString;
            bufferString.insert(bufferString.end(), { 'B', 'l', 'a', 'c', 'k' });
            return bufferString;
        };
        constexpr AZStd::fixed_string<128> test9{ MakeFixedStringWithInsertWithIteratorPos2() };
        static_assert(test2 == "Hello");
        static_assert(test3 == "Brown");
        static_assert(test4 == "BlueApp");
        static_assert(test5 == "llApp");
        static_assert(test6 == "XXXXXApp");
        static_assert(test7 == "GreenApp");
        static_assert(test8 == "Orange");
        static_assert(test9 == "Black");
    }

    TEST_F(String, FixedString_ReplaceIsConstexpr_Succeeds)
    {
        constexpr AZStd::fixed_string<128> test1{ "Hello" };
        constexpr AZStd::fixed_string<128> test2{ AZStd::fixed_string<128>{"Exe"}.replace(1, 1, test1) };
        constexpr AZStd::fixed_string<128> test3{ AZStd::fixed_string<128>{"Exe"}.replace(1, 1, test1, 2, 2) };
        constexpr AZStd::string_view aquaView{ "Aqua" };
        constexpr AZStd::fixed_string<128> test4{ AZStd::fixed_string<128>{"Exe"}.replace(1, 1, aquaView, 1, 3) };
        constexpr AZStd::fixed_string<128> test5{ AZStd::fixed_string<128>{"Hello{}"}.replace(5, 2, AZStd::string_view("World")) };
        constexpr AZStd::fixed_string<128> test6{ AZStd::fixed_string<128>{"Hello{}"}.replace(5, 2, "BigString", 3) };
        constexpr AZStd::fixed_string<128> test7{ AZStd::fixed_string<128>{"Hello{}"}.replace(5, 2, 3, 'V') };
        auto MakeFixedStringWithReplaceWithIteratorPos1 = []() constexpr
        {
            AZStd::fixed_string<128> bufferString{"Jello"};
            bufferString.replace(bufferString.begin(), bufferString.begin() + 3, "Hel");
            return bufferString;
        };
        constexpr AZStd::fixed_string<128> test8{ MakeFixedStringWithReplaceWithIteratorPos1() };
        auto MakeFixedStringWithReplaceWithIteratorPos2 = []() constexpr
        {
            AZStd::fixed_string<128> bufferString{ "Jello" };
            bufferString.replace(bufferString.begin(), bufferString.begin() + 3, AZStd::string_view{ "Mel" });
            return bufferString;
        };
        constexpr AZStd::fixed_string<128> test9{ MakeFixedStringWithReplaceWithIteratorPos2() };
        auto MakeFixedStringWithInsertWithIteratorPos3 = []() constexpr
        {
            AZStd::fixed_string<128> bufferString{ "Othello" };
            bufferString.replace(bufferString.begin() + 4, bufferString.end(), { 'r', 's' });
            return bufferString;
        };
        constexpr AZStd::fixed_string<128> test10{ MakeFixedStringWithInsertWithIteratorPos3() };
        auto MakeFixedStringWithInsertWithIteratorPos4 = []() constexpr
        {
            AZStd::fixed_string<128> bufferString{ "Theorello" };
            constexpr AZStd::array testString{ 'l', 'a', 't', 'i', 'v', 'e' };
            bufferString.replace(bufferString.begin() + 6, bufferString.end(), testString.begin(), testString.end());
            return bufferString;
        };
        constexpr AZStd::fixed_string<128> test11{ MakeFixedStringWithInsertWithIteratorPos4() };

        static_assert(test2 == "EHelloe");
        static_assert(test3 == "Elle");
        static_assert(test4 == "Equae");
        static_assert(test5 == "HelloWorld");
        static_assert(test6 == "HelloBig");
        static_assert(test7 == "HelloVVV");
        static_assert(test8 == "Hello");
        static_assert(test9 == "Mello");
        static_assert(test10 == "Others");
        static_assert(test11 == "Theorelative");
    }

    TEST_F(String, FixedString_PushBackIsConstexpr_Succeeds)
    {
        constexpr AZStd::fixed_string<128> test1 = []() constexpr
        {
            AZStd::fixed_string<128> bufferString{ "Jello" };
            bufferString.push_back('W');
            bufferString.push_back('o');
            bufferString.push_back('r');
            bufferString.push_back('l');
            bufferString.push_back('d');
            return bufferString;
        }();

        static_assert(test1 == "JelloWorld");
    }

    TEST_F(String, FixedString_EraseIsConstexpr_Succeeds)
    {
        constexpr AZStd::fixed_string<128> test1 = []() constexpr
        {
            AZStd::fixed_string<128> bufferString{ "Fellow" };
            bufferString.erase(bufferString.begin() + 5, bufferString.end());
            bufferString.erase(bufferString.begin());
            return bufferString;
        }();

        static_assert(test1 == "ello");
    }

    TEST_F(String, FixedString_FindMethodsAreConstexpr_Succeeds)
    {
        constexpr AZStd::fixed_string<128> bigString{ "skfhi3rildfhuy890uhklfjueosu8390hhklsahfiowh" };
        static_assert(bigString.find("fh") == 2);
        static_assert(bigString.find("fh", 4) == 10);
        static_assert(bigString.find('0') == 16);
        static_assert(bigString.find(AZStd::string_view{ "890" }) == 14);
        static_assert(bigString.rfind("hh") == 32);
        static_assert(bigString.rfind("hh", 31) == AZStd::fixed_string<128>::npos);
        static_assert(bigString.rfind('o') == 41);
        static_assert(bigString.rfind(AZStd::string_view{ "j" }) == 22);
        static_assert(bigString.find_first_of("hf") == 2);
        static_assert(bigString.find_first_of("hf", 4) == 10);
        static_assert(bigString.find_first_of('0') == 16);
        static_assert(bigString.find_first_of(AZStd::string_view{ "890" }) == 14);
        static_assert(bigString.find_first_not_of("struct") == 1);
        static_assert(bigString.find_first_not_of("struct", 17) == 18);
        static_assert(bigString.find_first_not_of('w') == 0);
        static_assert(bigString.find_first_not_of(AZStd::string_view{ "y" }, 13) == 14);
        static_assert(bigString.find_last_of("hf") == 43);
        static_assert(bigString.find_last_of("hf", 4) == 3);
        static_assert(bigString.find_last_of('0') == 31);
        static_assert(bigString.find_last_of(AZStd::string_view{ "893" }) == 30);
        static_assert(bigString.find_last_not_of("hwoif") == 37);
        static_assert(bigString.find_last_not_of("slh09a", 37) == 34);
        static_assert(bigString.find_last_not_of('h') == 42);
        static_assert(bigString.find_last_not_of(AZStd::string_view{ "why likes" }, 13) == 12);
    }

    TEST_F(String, FixedString_SwapIsConstexpr_Succeeds)
    {
        constexpr AZStd::fixed_string<64> test1 = []() constexpr
        {
            AZStd::fixed_string<64> bufferString1{ "First" };
            AZStd::fixed_string<64> bufferString2{ "Second" };
            bufferString1.swap(bufferString2);
            return bufferString1;
        }();

        static_assert(test1 == "Second");
    }

    TEST_F(String, FixedString_DeductionGuide_Succeeds)
    {
        constexpr AZStd::basic_fixed_string deducedFixedString1{'H', 'e', 'l', 'l', 'o' };
        static_assert(deducedFixedString1.max_size() == 5 );
        static_assert(deducedFixedString1 == "Hello");

        constexpr AZStd::basic_fixed_string deducedFixedString2{ L'H', L'e', L'l', L'l', L'o' };
        static_assert(deducedFixedString2.max_size() == 5);
        static_assert(deducedFixedString2 == L"Hello");

        constexpr AZStd::basic_fixed_string deducedFromLiteralFixedString1 = "Hello";
        static_assert(deducedFromLiteralFixedString1.max_size() == 5);
        static_assert(deducedFromLiteralFixedString1 == "Hello");

        constexpr AZStd::basic_fixed_string deducedFromLiteralFixedString2 = L"Hello";
        static_assert(deducedFromLiteralFixedString2.max_size() == 5);
        static_assert(deducedFromLiteralFixedString2 == L"Hello");
    }

    TEST_F(String, WildcardMatch_EmptyFilterWithNonEmptyValue_Fails)
    {
        AZStd::fixed_string<32> filter1;
        AZStd::string testValue{ "test" };
        EXPECT_FALSE(AZStd::wildcard_match(filter1, testValue));
    }
    TEST_F(String, WildcardMatch_EmptyFilterWithEmptyValue_Succeeds)
    {
        AZStd::fixed_string<32> filter1;
        AZStd::fixed_string<32> emptyValue;
        EXPECT_TRUE(AZStd::wildcard_match(filter1, emptyValue));
    }
    TEST_F(String, WildcardMatch_AsteriskOnlyFilterWithEmptyValue_Succeeds)
    {
        const char* filter1{ "*" };
        const char* filter2{ "**" };
        const char* emptyValue{ "" };
        EXPECT_TRUE(AZStd::wildcard_match(filter1, emptyValue));
        EXPECT_TRUE(AZStd::wildcard_match(filter2, emptyValue));
    }
    TEST_F(String, WildcardMatch_AsteriskQuestionMarkFilterWithEmptyValue_Failes)
    {
        // At least one character needs to be matched
        const char* filter1{ "*?" };
        const char* filter2{ "?*" };
        const char* emptyValue{ "" };
        EXPECT_FALSE(AZStd::wildcard_match(filter1, emptyValue));
        EXPECT_FALSE(AZStd::wildcard_match(filter2, emptyValue));
    }
    TEST_F(String, WildcardMatch_DotValue_Succeeds)
    {
        const char* filter1{ "?" };
        const char* dotValue{ "." };
        EXPECT_TRUE(AZStd::wildcard_match(filter1, dotValue));
    }
    TEST_F(String, WildcardMatch_DoubleDotValue_Succeeds)
    {
        const char* filter1{ "??" };
        const char* dotValue{ ".." };
        EXPECT_TRUE(AZStd::wildcard_match(filter1, dotValue));
    }
    TEST_F(String, WildcardMatch_GlobFilters_Succeeds)
    {
        const char* filter1{ "*" };
        const char* filter2{ "*?" };
        const char* filter3{ "?*" };
        EXPECT_TRUE(AZStd::wildcard_match(filter1, "Hello"));
        EXPECT_TRUE(AZStd::wildcard_match(filter1, "?"));
        EXPECT_TRUE(AZStd::wildcard_match(filter1, "*"));
        EXPECT_TRUE(AZStd::wildcard_match(filter1, "Q"));

        EXPECT_TRUE(AZStd::wildcard_match(filter2, "Hello"));
        EXPECT_TRUE(AZStd::wildcard_match(filter2, "?"));
        EXPECT_TRUE(AZStd::wildcard_match(filter2, "*"));
        EXPECT_TRUE(AZStd::wildcard_match(filter2, "Q"));

        EXPECT_TRUE(AZStd::wildcard_match(filter3, "Hello"));
        EXPECT_TRUE(AZStd::wildcard_match(filter3, "?"));
        EXPECT_TRUE(AZStd::wildcard_match(filter3, "*"));
        EXPECT_TRUE(AZStd::wildcard_match(filter3, "Q"));
    }

    TEST_F(String, WildcardMatch_NormalString_Succeeds)
    {
        constexpr AZStd::string_view jpgFilter{ "**/*.jpg" };
        EXPECT_FALSE(AZStd::wildcard_match(jpgFilter, "Test.jpg"));
        EXPECT_FALSE(AZStd::wildcard_match(jpgFilter, "Test.jpfg"));
        EXPECT_TRUE(AZStd::wildcard_match(jpgFilter, "Images/Other.jpg"));
        EXPECT_FALSE(AZStd::wildcard_match(jpgFilter, "Pictures/Other.gif"));

        constexpr AZStd::string_view tempDirFilter{ "temp/*" };
        EXPECT_TRUE(AZStd::wildcard_match(tempDirFilter, "temp/"));
        EXPECT_TRUE(AZStd::wildcard_match(tempDirFilter, "temp/f"));
        EXPECT_FALSE(AZStd::wildcard_match(tempDirFilter, "tem1/"));

        constexpr AZStd::string_view xmlFilter{ "test.xml" };
        EXPECT_TRUE(AZStd::wildcard_match(xmlFilter, "Test.xml"));
        EXPECT_TRUE(AZStd::wildcard_match(xmlFilter, "test.xml"));
        EXPECT_FALSE(AZStd::wildcard_match(xmlFilter, "test.xmlschema"));
        EXPECT_FALSE(AZStd::wildcard_match(xmlFilter, "Xtest.xml"));
    }

    TEST_F(String, WildcardMatchCase_CanBeCompileTimeEvaluated_Succeeds)
    {
        constexpr AZStd::string_view filter1{ "bl?h.*" };
        constexpr AZStd::fixed_string<32> blahValue{ "blah.jpg" };
        static_assert(AZStd::wildcard_match_case(filter1, blahValue));
    }

    TEST_F(String, StringCXX20Erase_Succeeds)
    {
        AZStd::string eraseIfTest = "ABC CBA";
        auto erasePredicate = [](AZStd::string::value_type ch)
        {
            return ch == 'C';
        };
        auto eraseCount = AZStd::erase_if(eraseIfTest, erasePredicate);
        EXPECT_EQ(2, eraseCount);
        EXPECT_EQ(5, eraseIfTest.size());
        EXPECT_STREQ("AB BA", eraseIfTest.c_str());

        // Now erase the letter 'A';
        eraseCount = AZStd::erase(eraseIfTest, 'A');
        EXPECT_EQ(2, eraseCount);
        EXPECT_EQ(3, eraseIfTest.size());
        EXPECT_EQ("B B", eraseIfTest);
    }

    TEST_F(String, FixedStringCXX20Erase_Succeeds)
    {
        // Erase 'l' from the phrase "Hello" World"
        constexpr auto eraseTest = [](const char* testString) constexpr
        {
            AZStd::fixed_string<16> testResult{ testString };
            AZStd::erase(testResult, 'l');
            return testResult;
        }("HelloWorld");

        static_assert(eraseTest == "HeoWord");
        EXPECT_EQ("HeoWord", eraseTest);

        // Use erase_if to erase both 'H' and 'e' from the remaining eraseTest string
        constexpr auto eraseIfTest = [](AZStd::string_view testString) constexpr
        {
            AZStd::fixed_string<16> testResult{ testString };
            auto erasePredicate = [](char ch)
            {
                return ch == 'H' || ch == 'e';
            };
            AZStd::erase_if(testResult, erasePredicate);
            return testResult;
        }(eraseTest);

        static_assert(eraseIfTest == "oWord");
        EXPECT_EQ("oWord", eraseIfTest);
    }

    TEST_F(String, StringWithStatelessAllocator_HasSizeOf_PointerPlus2IntTypes_Compiles)
    {
        // The expected size of a basic_string with a stateless allocator
        // Is the size of the pointer (used for storing the memory address of the string)
        // + the size of the string "size" member used to store the size of the string
        // + the size of the string "capacity" member used to store the capacity of the string
        size_t constexpr ExpectedBasicStringSize = sizeof(void*) + 2 * sizeof(size_t);
        using StringStatelessAllocator = AZStd::basic_string<char, AZStd::char_traits<char>, AZStd::stateless_allocator>;
        static_assert(ExpectedBasicStringSize == sizeof(StringStatelessAllocator),
            "Stateless allocator is counting against the size of the basic_string class"
            " A change has made to break the empty base optimization of the basic_string class");
    }

    TEST_F(String, StringWithStatefulAllocator_HasSizeOf_PointerPlus2IntTypesPlusAllocator_Compiles)
    {
        // The expected size of a basic_string with a stateless allocator
        // Is the size of the pointer (used for storing the memory address of the string)
        // + the size of the string "size" member used to store the size of the string
        // + the size of the string "capacity" member used to store the capacity of the string
        size_t constexpr ExpectedBasicStringSize = sizeof(void*) + 2 * sizeof(size_t);
        static_assert(ExpectedBasicStringSize == sizeof(AZStd::string),
            "Using Stateful allocator with basic_string class should result in a 24-byte string class"
            " on 64-bit platforms ");
    }

    TEST_F(String, VectorOfChar_ConvertibleToStringView_Compiles)
    {
        // Validates the c++23 range constructor for AZStd::string_view
        static_assert(AZStd::constructible_from<AZStd::string_view, AZStd::vector<char>>);
        static_assert(AZStd::constructible_from<AZStd::string, AZStd::vector<char>>);
        const auto testString = AZStd::string(AZStd::vector<char>{'H', 'e', 'l', 'l', 'o'});
        EXPECT_EQ("Hello", testString);
    }

    TEST_F(String, AZStdString_DeductionGuide_Compiles)
    {
        constexpr AZStd::string_view testView{ "Hello" };
        {
            // legacy common iterator deduction guide
            AZStd::basic_string testString(testView.begin(), testView.end());
            EXPECT_EQ("Hello", testString);
        }
        {
            // basic_string_view deduction guide
            AZStd::basic_string testString(testView);
            EXPECT_EQ("Hello", testString);
        }
        {
            // basic_string_view with position and size deduction guide
            AZStd::basic_string testString(testView, 1, 3);
            EXPECT_EQ("ell", testString);
        }
    }

    template <typename StringType>
    class ImmutableStringFunctionsFixture
        : public LeakDetectionFixture
    {};
    using StringTypesToTest = ::testing::Types<AZStd::string_view, AZStd::string, AZStd::fixed_string<1024>>;
    TYPED_TEST_CASE(ImmutableStringFunctionsFixture, StringTypesToTest);

    TYPED_TEST(ImmutableStringFunctionsFixture, Contains_Succeeds)
    {
        TypeParam testStrValue{ R"(C:\o3de\Assets\Materials\texture\image.png)" };
        EXPECT_TRUE(testStrValue.contains("Materials"));
        EXPECT_FALSE(testStrValue.contains("Animations"));
        EXPECT_TRUE(testStrValue.contains('o'));
        EXPECT_FALSE(testStrValue.contains('Q'));

        TypeParam typeParamEntry{ R"(texture)" };
        TypeParam typeParamNoEntry{ R"(physics)" };
        EXPECT_TRUE(testStrValue.contains(typeParamEntry));
        EXPECT_FALSE(testStrValue.contains(typeParamNoEntry));
    }

    template<typename T>
    const T* GetFormatString()
    {
        return "%s";
    }

    template <>
    const wchar_t* GetFormatString<wchar_t>()
    {
        return L"%s";
    }

    template<typename T>
    class StringFormatFixture
        : public UnitTest::LeakDetectionFixture
    {
    };

    using StringFormatTypesToTest = ::testing::Types<AZStd::string>; //, AZStd::wstring>;
    TYPED_TEST_CASE(StringFormatFixture, StringFormatTypesToTest);

    TYPED_TEST(StringFormatFixture, CanFormatStringLongerThan2048Chars)
    {
        TypeParam str(4096, 'x');
        TypeParam formatted = TypeParam::format(GetFormatString<typename TypeParam::value_type>(), str.c_str());
        EXPECT_EQ(str, formatted);
    }

    template<typename T>
    class StringTypeFixture
        : public LeakDetectionFixture
    {};

    using StringTypeWithRangeFunctions = ::testing::Types<AZStd::string, AZStd::fixed_string<32>>;
    TYPED_TEST_CASE(StringTypeFixture, StringTypeWithRangeFunctions);

    TYPED_TEST(StringTypeFixture, RangeConstructor_Succeeds)
    {
        constexpr AZStd::string_view testView = "abc";

        TypeParam testString(AZStd::from_range, testView);
        EXPECT_EQ("abc", testString);

        testString = TypeParam(AZStd::from_range, AZStd::vector<char>{testView.begin(), testView.end()});
        EXPECT_EQ("abc", testString);
        testString = TypeParam(AZStd::from_range, AZStd::list<char>{testView.begin(), testView.end()});
        EXPECT_EQ("abc", testString);
        testString = TypeParam(AZStd::from_range, AZStd::deque<char>{testView.begin(), testView.end()});
        EXPECT_EQ("abc", testString);
        testString = TypeParam(AZStd::from_range, AZStd::set<char>{testView.begin(), testView.end()});
        EXPECT_EQ("abc", testString);
        testString = TypeParam(AZStd::from_range, AZStd::unordered_set<char>{testView.begin(), testView.end()});
        EXPECT_EQ("abc", testString);
        testString = TypeParam(AZStd::from_range, AZStd::fixed_vector<char, 8>{testView.begin(), testView.end()});
        EXPECT_EQ("abc", testString);
        testString = TypeParam(AZStd::from_range, AZStd::array{ 'a', 'b', 'c' });
        EXPECT_EQ("abc", testString);
        testString = TypeParam(AZStd::from_range, AZStd::span(testView));
        EXPECT_EQ("abc", testString);

        AZStd::fixed_string<8> testValue(testView);
        testString = TypeParam(AZStd::from_range, testValue);
        EXPECT_EQ("abc", testString);
        testString = TypeParam(AZStd::from_range, AZStd::string(testView));
        EXPECT_EQ("abc", testString);

        // Test Range views
        testString = TypeParam(AZStd::from_range, testValue | AZStd::views::transform([](const char elem) -> char { return elem + 1; }));
        EXPECT_EQ("bcd", testString);

        // Test Ranges with different sentinel types
        testString = TypeParam(AZStd::from_range, testValue | AZStd::views::transform([](const char elem)
            { return AZStd::fixed_string<2>{ char(elem + 1) }; }) | AZStd::views::join);
        EXPECT_EQ("bcd", testString);
    }

    TYPED_TEST(StringTypeFixture, InsertRange_Succeeds)
    {
        constexpr AZStd::string_view testView = "abc";
        TypeParam testString{ 'd', 'e', 'f' };
        testString.insert_range(testString.begin(), AZStd::vector<char>{testView.begin(), testView.end()});
        testString.insert_range(testString.end(), testView | AZStd::views::transform([](const char elem) -> char { return elem + 6; }));
        EXPECT_EQ("abcdefghi", testString);
    }

    TYPED_TEST(StringTypeFixture, AppendRange_Succeeds)
    {
        constexpr AZStd::string_view testView = "def";
        TypeParam testString{ 'a', 'b', 'c' };
        testString.append_range(AZStd::vector<char>{testView.begin(), testView.end()});
        testString.append_range(testView | AZStd::views::transform([](const char elem) -> char { return elem + 3; }));
        EXPECT_THAT(testString, ::testing::ElementsAre('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i'));
        EXPECT_EQ("abcdefghi", testString);
    }

    TYPED_TEST(StringTypeFixture, AssignRange_Succeeds)
    {
        constexpr AZStd::string_view testView = "def";
        TypeParam testString{ 'a', 'b', 'c' };
        testString.assign_range(AZStd::vector<char>{testView.begin(), testView.end()});
        EXPECT_EQ("def", testString);
        testString.assign_range(testView | AZStd::views::transform([](const char elem) -> char { return elem + 3; }));
        EXPECT_EQ("ghi", testString);
    }

    TYPED_TEST(StringTypeFixture, ReplaceWithRange_Succeeds)
    {
        constexpr AZStd::string_view testView = "def";
        TypeParam testString{ 'a', 'b', 'c' };
        // Replace 'a' with 'd', 'e', 'f'
        testString.replace_with_range(testString.begin(), testString.begin() + 1, AZStd::vector<char>{testView.begin(), testView.end()});
        EXPECT_EQ("defbc", testString);
        // Replace 'b', 'c' with 'g', 'h', 'i'
        testString.replace_with_range(testString.begin() + 3, testString.end() + 5, testView | AZStd::views::transform([](const char elem) -> char { return elem + 3; }));
        EXPECT_EQ("defghi", testString);
    }

    TYPED_TEST(StringTypeFixture, ResizeAndOverwrite_AddChars_Succeeds)
    {
        constexpr AZStd::string_view testView = "abcdef";
        TypeParam testString("abc");
        auto AppendCharacters = [oldSize = testString.size()](char* dataPtr, size_t newSize) -> size_t
        {
            constexpr AZStd::string_view appendChars = "def";
            ::memcpy(dataPtr + oldSize, appendChars.data(), appendChars.size());
            EXPECT_LE(oldSize + appendChars.size(), newSize);
            return oldSize + appendChars.size();
        };
        testString.resize_and_overwrite(testView.size(), AppendCharacters);
        ASSERT_EQ(testView.size(), testString.size());
        EXPECT_EQ(testView, testString);

        // Validate that a size larger than the new resize, shrinks to the
        // exact size used
        auto ReplaceCharacters = [&testView](char* dataPtr, size_t newSize) -> size_t
        {
            ::memcpy(dataPtr, testView.data(), testView.size());
            EXPECT_LE(testView.size(), newSize);
            return testView.size();
        };
        // Resize to 25 characters
        testString.resize_and_overwrite(testView.size() + 25, ReplaceCharacters);
        // Size of testString should be the size of the testView which is 6
        ASSERT_EQ(testView.size(), testString.size());
        EXPECT_EQ(testView, testString);
    }

    TYPED_TEST(StringTypeFixture, ResizeAndOverwrite_RemoveChars_Succeeds)
    {
        constexpr AZStd::string_view testView = "abc";
        TypeParam testString("abcdef");
        auto RemoveCharacters = [&testView](char* dataPtr, size_t newSize) -> size_t
        {
            ::memcpy(dataPtr, testView.data(), testView.size());
            EXPECT_LE(testView.size(), newSize);
            return testView.size();
        };
        // Resize from 6 to 3 characters
        testString.resize_and_overwrite(testView.size(), RemoveCharacters);
        ASSERT_EQ(testView.size(), testString.size());
        EXPECT_EQ(testView, testString);
    }
}

#if defined(HAVE_BENCHMARK)
namespace Benchmark
{
    class StringBenchmarkFixture
        : public ::UnitTest::AllocatorsBenchmarkFixture
    {
    protected:
        template <typename Element, typename Traits, typename Allocator>
        void SwapStringViaMemcpy(AZStd::basic_string<Element, Traits, Allocator>& left,
            AZStd::basic_string<Element, Traits, Allocator>& right)
        {
            // Test Swapping the storage container for the string class
            // Use aligned_storage to prevent constructors from slowing operation
            AZStd::aligned_storage_for_t<decltype(left.m_storage.first())> tempStorage;
            ::memcpy(&tempStorage, &left.m_storage.first(), sizeof(left.m_storage.first()));
            ::memcpy(&left.m_storage.first(), &right.m_storage.first(), sizeof(right.m_storage.first()));
            ::memcpy(&right.m_storage.first(), &tempStorage, sizeof(tempStorage));
        }


        template <typename Element, typename Traits, typename Allocator>
        void SwapStringViaPointerSizedSwaps(AZStd::basic_string<Element, Traits, Allocator>& left,
            AZStd::basic_string<Element, Traits, Allocator>& right)
        {
            using String = AZStd::basic_string<Element, Traits, Allocator>;
            using PointerAlignedData = typename String::PointerAlignedData;
            // Use pointer sized swaps to swap the string storage
            auto& leftAlignedPointers = reinterpret_cast<PointerAlignedData&>(left.m_storage.first());
            auto& rightAlignedPointers = reinterpret_cast<PointerAlignedData&>(right.m_storage.first());
            constexpr size_t alignedPointerCount{ AZStd::size(PointerAlignedData{}.m_alignedValues) };
            for (size_t i = 0; i < alignedPointerCount; ++i)
            {
                AZStd::swap(leftAlignedPointers.m_alignedValues[i], rightAlignedPointers.m_alignedValues[i]);
            }
        }
    };

    BENCHMARK_F(StringBenchmarkFixture, BM_StringPointerSwapShortString)(benchmark::State& state)
    {
        AZStd::string test1{ "foo bar"};
        AZStd::string test2{ "bar foo" };
        for ([[maybe_unused]] auto _ : state)
        {
            SwapStringViaPointerSizedSwaps(test1, test2);
        }
    }

    BENCHMARK_F(StringBenchmarkFixture, BM_StringPointerSwapLongString)(benchmark::State& state)
    {
        AZStd::string test1{ "The brown quick wolf jumped over the hyperactive cat" };
        AZStd::string test2{ "The quick brown fox jumped over the lazy dog" };
        for ([[maybe_unused]] auto _ : state)
        {
            SwapStringViaPointerSizedSwaps(test1, test2);
        }
    }

    BENCHMARK_F(StringBenchmarkFixture, BM_StringMemcpySwapShortString)(benchmark::State& state)
    {
        AZStd::string test1{ "foo bar" };
        AZStd::string test2{ "bar foo" };
        for ([[maybe_unused]] auto _ : state)
        {
            SwapStringViaMemcpy(test1, test2);
        }
    }

    BENCHMARK_F(StringBenchmarkFixture, BM_StringMemcpySwapLongString)(benchmark::State& state)
    {
        AZStd::string test1{ "The brown quick wolf jumped over the hyperactive cat" };
        AZStd::string test2{ "The quick brown fox jumped over the lazy dog" };
        for ([[maybe_unused]] auto _ : state)
        {
            SwapStringViaMemcpy(test1, test2);
        }
    }

    template <typename StringType>
    class StringTemplateBenchmarkFixture
        : public ::UnitTest::AllocatorsBenchmarkFixture
    {};

    // AZStd::string assign benchmarks
    BENCHMARK_TEMPLATE_DEFINE_F(StringTemplateBenchmarkFixture, BM_StringAssignConstPointer_NullDelimited, AZStd::string)(benchmark::State& state)
    {
        AZStd::string sourceString(state.range(0), 'a');
        const char* sourceAddress = sourceString.c_str();

        for ([[maybe_unused]] auto _ : state)
        {
            AZStd::string assignString;
            assignString.assign(sourceAddress);
        }
    }

    BENCHMARK_REGISTER_F(StringTemplateBenchmarkFixture, BM_StringAssignConstPointer_NullDelimited)
        ->RangeMultiplier(2)->Range(8, 32);

    BENCHMARK_TEMPLATE_DEFINE_F(StringTemplateBenchmarkFixture, BM_StringAssignConstPointer_WithSize, AZStd::string)(benchmark::State& state)
    {
        AZStd::string sourceString(state.range(0), 'a');
        const char* sourceAddress = sourceString.c_str();
        const size_t sourceSize = sourceString.size();

        for ([[maybe_unused]] auto _ : state)
        {
            AZStd::string assignString;
            assignString.assign(sourceAddress, sourceSize);
        }
    }

    BENCHMARK_REGISTER_F(StringTemplateBenchmarkFixture, BM_StringAssignConstPointer_WithSize)
        ->RangeMultiplier(2)->Range(8, 32);

    BENCHMARK_TEMPLATE_DEFINE_F(StringTemplateBenchmarkFixture, BM_StringAssignFromIterators, AZStd::string)(benchmark::State& state)
    {
        AZStd::string sourceString(state.range(0), 'a');
        auto sourceBegin = sourceString.begin();
        auto sourceEnd = sourceString.end();

        for ([[maybe_unused]] auto _ : state)
        {
            AZStd::string assignString;
            assignString.assign(sourceBegin, sourceEnd);
        }
    }

    BENCHMARK_REGISTER_F(StringTemplateBenchmarkFixture, BM_StringAssignFromIterators)
        ->RangeMultiplier(2)->Range(8, 32);

    BENCHMARK_TEMPLATE_DEFINE_F(StringTemplateBenchmarkFixture, BM_StringAssignFromStringView, AZStd::string)(benchmark::State& state)
    {
        AZStd::string sourceString(state.range(0), 'a');
        AZStd::string_view sourceView(sourceString);

        for ([[maybe_unused]] auto _ : state)
        {
            AZStd::string assignString;
            assignString.assign(sourceView);
        }
    }

    BENCHMARK_REGISTER_F(StringTemplateBenchmarkFixture, BM_StringAssignFromStringView)
        ->RangeMultiplier(2)->Range(8, 32);

    BENCHMARK_TEMPLATE_DEFINE_F(StringTemplateBenchmarkFixture, BM_StringAssignFromString_LValue, AZStd::string)(benchmark::State& state)
    {
        AZStd::string sourceString(state.range(0), 'a');

        for ([[maybe_unused]] auto _ : state)
        {
            AZStd::string assignString;
            assignString.assign(sourceString);
        }
    }

    BENCHMARK_REGISTER_F(StringTemplateBenchmarkFixture, BM_StringAssignFromString_LValue)
        ->RangeMultiplier(2)->Range(8, 32);

    BENCHMARK_TEMPLATE_DEFINE_F(StringTemplateBenchmarkFixture, BM_StringAssignFromString_RValue, AZStd::string)(benchmark::State& state)
    {
        AZStd::string sourceString(state.range(0), 'a');

        for ([[maybe_unused]] auto _ : state)
        {
            AZStd::string assignString;
            assignString.assign(AZStd::move(sourceString));
        }
    }

    BENCHMARK_REGISTER_F(StringTemplateBenchmarkFixture, BM_StringAssignFromString_RValue)
        ->RangeMultiplier(2)->Range(8, 32);

    BENCHMARK_TEMPLATE_DEFINE_F(StringTemplateBenchmarkFixture, BM_StringAssignFromSingleCharacter, AZStd::string)(benchmark::State& state)
    {
        for ([[maybe_unused]] auto _ : state)
        {
            AZStd::string assignString;
            assignString.assign(state.range(0), 'a');
        }
    }

    BENCHMARK_REGISTER_F(StringTemplateBenchmarkFixture, BM_StringAssignFromSingleCharacter)
        ->RangeMultiplier(2)->Range(8, 32);

    // AZStd::fixed_string assign benchmarks
    // NOTE: This is a copy-and-paste of above because Google Benchmark doesn't support real templated benchmarks like Googletest
    // https://github.com/google/benchmark/issues/541
    BENCHMARK_TEMPLATE_DEFINE_F(StringTemplateBenchmarkFixture, BM_FixedStringAssignConstPointer_NullDelimited, AZStd::fixed_string<1024>)(benchmark::State& state)
    {
        AZStd::fixed_string<1024> sourceString(state.range(0), 'a');
        const char* sourceAddress = sourceString.c_str();

        for ([[maybe_unused]] auto _ : state)
        {
            AZStd::fixed_string<1024> assignString;
            assignString.assign(sourceAddress);
        }
    }

    BENCHMARK_REGISTER_F(StringTemplateBenchmarkFixture, BM_FixedStringAssignConstPointer_NullDelimited)
        ->RangeMultiplier(2)->Range(8, 32);

    BENCHMARK_TEMPLATE_DEFINE_F(StringTemplateBenchmarkFixture, BM_FixedStringAssignConstPointer_WithSize, AZStd::fixed_string<1024>)(benchmark::State& state)
    {
        AZStd::fixed_string<1024> sourceString(state.range(0), 'a');
        const char* sourceAddress = sourceString.c_str();
        const size_t sourceSize = sourceString.size();

        for ([[maybe_unused]] auto _ : state)
        {
            AZStd::fixed_string<1024> assignString;
            assignString.assign(sourceAddress, sourceSize);
        }
    }

    BENCHMARK_REGISTER_F(StringTemplateBenchmarkFixture, BM_FixedStringAssignConstPointer_WithSize)
        ->RangeMultiplier(2)->Range(8, 32);

    BENCHMARK_TEMPLATE_DEFINE_F(StringTemplateBenchmarkFixture, BM_FixedStringAssignFromIterators, AZStd::fixed_string<1024>)(benchmark::State& state)
    {
        AZStd::fixed_string<1024> sourceString(state.range(0), 'a');
        auto sourceBegin = sourceString.begin();
        auto sourceEnd = sourceString.end();

        for ([[maybe_unused]] auto _ : state)
        {
            AZStd::fixed_string<1024> assignString;
            assignString.assign(sourceBegin, sourceEnd);
        }
    }

    BENCHMARK_REGISTER_F(StringTemplateBenchmarkFixture, BM_FixedStringAssignFromIterators)
        ->RangeMultiplier(2)->Range(8, 32);

    BENCHMARK_TEMPLATE_DEFINE_F(StringTemplateBenchmarkFixture, BM_FixedStringAssignFromStringView, AZStd::fixed_string<1024>)(benchmark::State& state)
    {
        AZStd::fixed_string<1024> sourceString(state.range(0), 'a');
        AZStd::string_view sourceView(sourceString);

        for ([[maybe_unused]] auto _ : state)
        {
            AZStd::fixed_string<1024> assignString;
            assignString.assign(sourceView);
        }
    }

    BENCHMARK_REGISTER_F(StringTemplateBenchmarkFixture, BM_FixedStringAssignFromStringView)
        ->RangeMultiplier(2)->Range(8, 32);

    BENCHMARK_TEMPLATE_DEFINE_F(StringTemplateBenchmarkFixture, BM_FixedStringAssignFromString_LValue, AZStd::fixed_string<1024>)(benchmark::State& state)
    {
        AZStd::fixed_string<1024> sourceString(state.range(0), 'a');

        for ([[maybe_unused]] auto _ : state)
        {
            AZStd::fixed_string<1024> assignString;
            assignString.assign(sourceString);
        }
    }

    BENCHMARK_REGISTER_F(StringTemplateBenchmarkFixture, BM_FixedStringAssignFromString_LValue)
        ->RangeMultiplier(2)->Range(8, 32);

    BENCHMARK_TEMPLATE_DEFINE_F(StringTemplateBenchmarkFixture, BM_FixedStringAssignFromString_RValue, AZStd::fixed_string<1024>)(benchmark::State& state)
    {
        AZStd::fixed_string<1024> sourceString(state.range(0), 'a');

        for ([[maybe_unused]] auto _ : state)
        {
            AZStd::fixed_string<1024> assignString;
            assignString.assign(AZStd::move(sourceString));
        }
    }

    BENCHMARK_REGISTER_F(StringTemplateBenchmarkFixture, BM_FixedStringAssignFromString_RValue)
        ->RangeMultiplier(2)->Range(8, 32);

    BENCHMARK_TEMPLATE_DEFINE_F(StringTemplateBenchmarkFixture, BM_FixedStringAssignFromSingleCharacter, AZStd::fixed_string<1024>)(benchmark::State& state)
    {
        for ([[maybe_unused]] auto _ : state)
        {
            AZStd::fixed_string<1024> assignString;
            assignString.assign(state.range(0), 'a');
        }
    }

    BENCHMARK_REGISTER_F(StringTemplateBenchmarkFixture, BM_FixedStringAssignFromSingleCharacter)
        ->RangeMultiplier(2)->Range(8, 32);
}
#endif