#! /bin/sh
#
# To run this script, ensure shunit2 (https://github.com/kward/shunit2)
# is available on the local directory, then just run sh bin_parabola-java_tests
#
# inotifywait -r -m -e MODIFY . | while read l; do sh bin_parabola-java_tests; done

declare test_dir

. ./bin_parabola-java > /dev/null

INIT_JVM_DIR=${JVM_DIR}
INIT_DEFAULT_PATH=${DEFAULT_PATH}
INIT_DEFAULT_PATH_JRE=${DEFAULT_PATH_JRE}

# Redefining this so that tested script can be invoked without root privileges
check_root() {
  true
}


get_rand_str() {
  echo $(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 10 | head -n 1)
}

setUp() {
  test_dir=$(mktemp -d)
  JVM_DIR=${test_dir}${INIT_JVM_DIR}
  DEFAULT_PATH=${test_dir}${INIT_DEFAULT_PATH}
  DEFAULT_PATH_JRE=${test_dir}${INIT_DEFAULT_PATH_JRE}
  JAVA_NAME=$(get_rand_str)
  mkdir -p ${JVM_DIR}
}

tearDown() {
  rm -rf ${test_dir}
}

# $1: path of Java environment to create
create_raw_java_env() {
  java_env_name=$1
  bin_name=$2
  mkdir -p ${JVM_DIR}/${java_env_name}/bin
  touch    ${JVM_DIR}/${java_env_name}/bin/$bin_name
  chmod +x ${JVM_DIR}/${java_env_name}/bin/$bin_name
}

create_valid_jre8_env() {
  create_raw_java_env "$1/jre" "java"
}

# $1: path of Java environment to create
create_valid_jre8_jdk8_env() {
  create_raw_java_env "$1" "java"
  create_raw_java_env "$1" "javac"
  create_valid_jre8_env "$1"
}

create_valid_jre9_env() {
  create_raw_java_env "$1" "java"
}

create_valid_jre9_jdk9_env() {
  create_raw_java_env "$1" "java"
  create_raw_java_env "$1" "javac"
}

set_default_for_test() {
  ln -s $1 ${DEFAULT_PATH}
  if [ -d ${DEFAULT_PATH}/jre ]; then
    ln -s $1/jre ${DEFAULT_PATH_JRE}
  else
    ln -s $1 ${DEFAULT_PATH_JRE}
  fi
}

assertDefaultNotSet() {
  assertNull 'Default is set' "$(readlink ${DEFAULT_PATH})"
  assertNull 'Default runtime is set' "$(readlink ${DEFAULT_PATH_JRE})"
}

assertDefaultSetTo() {
  new_java=$1
  assertEquals "Default points at wrong Java env" "${new_java}" "$(readlink ${DEFAULT_PATH})"
  if [ ${new_java} == */jre ]; then
    assertEquals "Default runtime points at wrong Java env" "${new_java}/jre" "$(readlink ${DEFAULT_PATH_JRE})"
  fi
}

# do_status

test_do_status_with_jre8_default() {
  JAVA_NAME_1="a$(get_rand_str)"
  JAVA_NAME_2="b$(get_rand_str)"
  JAVA_NAME_3="c$(get_rand_str)"
  create_valid_jre8_env "${JAVA_NAME_1}"
  set_default_for_test "${JAVA_NAME_1}/jre"
  create_valid_jre8_jdk8_env "${JAVA_NAME_2}"
  create_valid_jre9_env "${JAVA_NAME_3}"
  mess="Available Java environments:"
  mess+="\n  ${JAVA_NAME_1}/jre (default)"
  mess+="\n  ${JAVA_NAME_2}"
  mess+="\n  ${JAVA_NAME_3}"
  expected=$(echo -e "${mess}")
  assertEquals 'Wrong status output' "${expected}" "$(do_status)"
}

test_do_status_with_jre9_default() {
  JAVA_NAME_1="a$(get_rand_str)"
  JAVA_NAME_2="b$(get_rand_str)"
  JAVA_NAME_3="c$(get_rand_str)"
  create_valid_jre8_env "${JAVA_NAME_1}"
  create_valid_jre8_jdk8_env "${JAVA_NAME_2}"
  create_valid_jre9_env "${JAVA_NAME_3}"
  set_default_for_test "${JAVA_NAME_3}"
  mess="Available Java environments:"
  mess+="\n  ${JAVA_NAME_1}/jre"
  mess+="\n  ${JAVA_NAME_2}"
  mess+="\n  ${JAVA_NAME_3} (default)"
  expected=$(echo -e "${mess}")
  assertEquals 'Wrong status output' "${expected}" "$(do_status)"
}

test_do_status_with_jdk9_default() {
  JAVA_NAME_1="a$(get_rand_str)"
  JAVA_NAME_2="b$(get_rand_str)"
  JAVA_NAME_3="c$(get_rand_str)"
  create_valid_jre8_env "${JAVA_NAME_1}"
  create_valid_jre8_jdk8_env "${JAVA_NAME_2}"
  create_valid_jre9_jdk9_env "${JAVA_NAME_3}"
  set_default_for_test "${JAVA_NAME_3}"
  mess="Available Java environments:"
  mess+="\n  ${JAVA_NAME_1}/jre"
  mess+="\n  ${JAVA_NAME_2}"
  mess+="\n  ${JAVA_NAME_3} (default)"
  expected=$(echo -e "${mess}")
  assertEquals 'Wrong status output' "${expected}" "$(do_status)"
}

test_do_status_no_default() {
  JAVA_NAME_1="a$(get_rand_str)"
  JAVA_NAME_2="b$(get_rand_str)"
  JAVA_NAME_3="c$(get_rand_str)"
  JAVA_NAME_4="d$(get_rand_str)"
  create_valid_jre8_env "${JAVA_NAME_1}"
  create_valid_jre8_jdk8_env "${JAVA_NAME_2}"
  create_valid_jre9_env "${JAVA_NAME_3}"
  create_valid_jre9_jdk9_env "${JAVA_NAME_4}"
  mess="Available Java environments:"
  mess+="\n  ${JAVA_NAME_1}/jre"
  mess+="\n  ${JAVA_NAME_2}"
  mess+="\n  ${JAVA_NAME_3}"
  mess+="\n  ${JAVA_NAME_4}"
  mess+="\nNo Java environment set as default"
  expected=$(echo -e "${mess}")
  assertEquals 'Wrong status output' "${expected}" "$(do_status)"
}

test_do_status_no_duplicate_entry_jre9_jdk9() {
  JAVA_NAME_1="a$(get_rand_str)"
  create_valid_jre9_jdk9_env "${JAVA_NAME_1}"
  mess="Available Java environments:"
  mess+="\n  ${JAVA_NAME_1}"
  mess+="\nNo Java environment set as default"
  expected=$(echo -e "${mess}")
  assertEquals 'Wrong status output' "${expected}" "$(do_status)"
}

test_do_status_no_javas() {
  assertEquals 'Wrong status output' 'No compatible Java environment installed' "$(do_status)"
}

test_do_status_jre_but_jdk_exists() {
  create_valid_jre8_jdk8_env "${JAVA_NAME}"
  set_default_for_test "${JAVA_NAME}/jre"
  mess="Available Java environments:"
  mess+="\n  ${JAVA_NAME} (${JAVA_NAME}/jre default)"
  expected=$(echo -e "${mess}")
  assertEquals 'Wrong status output' "${expected}" "$(do_status)"
}

# do_get

test_do_get_with_jdk8_default() {
  create_valid_jre8_jdk8_env "${JAVA_NAME}"
  set_default_for_test "${JAVA_NAME}"
  assertEquals 'Wrong result' "${JAVA_NAME}" "$(do_get)"
  assertDefaultSetTo "${JAVA_NAME}"
}

test_do_get_without_default() {
  create_valid_jre8_jdk8_env "$(get_rand_str)"
  create_valid_jre9_jdk9_env "$(get_rand_str)"
  assertNull 'Wrong result' "$(do_get)"
}

test_do_get_with_initial_null() {
  set_default_for_test "/dev/null"
  assertNull 'Wrong result' "$(do_get)"
}

test_do_get_with_jdk9_default() {
  create_valid_jre9_jdk9_env "${JAVA_NAME}"
  set_default_for_test "${JAVA_NAME}"
  assertEquals 'Wrong result' "${JAVA_NAME}" "$(do_get)"
  assertDefaultSetTo "${JAVA_NAME}"
}

# do_set

test_do_set_new_invalid() {
  create_valid_jre8_jdk8_env "${JAVA_NAME}"
  set_default_for_test "${JAVA_NAME}"
  output=$(do_set "INVALID")
  assertEquals 'Wrong status returned' 1 $?
  assertEquals 'Wrong message' "'${JVM_DIR}/INVALID' is not a valid Java environment path" "${output}"
  assertDefaultSetTo "${JAVA_NAME}"
}

test_do_set_current_invalid() {
  create_valid_jre8_jdk8_env "${JAVA_NAME}"
  set_default_for_test "INVALID"
  $(do_set "${JAVA_NAME}")
  assertEquals 'Wrong status returned' 0 $?
  assertDefaultSetTo "${JAVA_NAME}"
}

test_do_set_jre8_with_default_already_set_to_jre8() {
  create_valid_jre8_env "${JAVA_NAME}"
  set_default_for_test "${JAVA_NAME}/jre"
  JAVA_NAME_2="$(get_rand_str)"
  create_valid_jre8_env "${JAVA_NAME_2}"
  $(do_set "${JAVA_NAME_2}/jre")
  assertEquals 'Wrong status returned' 0 $?
  assertDefaultSetTo "${JAVA_NAME_2}/jre"
}

test_do_set_jre9_with_default_already_set_to_jre8() {
  create_valid_jre8_env "${JAVA_NAME}"
  set_default_for_test "${JAVA_NAME}/jre"
  JAVA_NAME_2="$(get_rand_str)"
  create_valid_jre9_env "${JAVA_NAME_2}"
  $(do_set "${JAVA_NAME_2}")
  assertEquals 'Wrong status returned' 0 $?
  assertDefaultSetTo "${JAVA_NAME_2}"
}

test_do_set_jdk9_with_default_already_set_to_jdk8() {
  create_valid_jre8_jdk8_env "${JAVA_NAME}"
  set_default_for_test "${JAVA_NAME}"
  JAVA_NAME_2="$(get_rand_str)"
  create_valid_jre9_jdk9_env "${JAVA_NAME_2}"
  $(do_set "${JAVA_NAME_2}")
  assertEquals 'Wrong status returned' 0 $?
  assertDefaultSetTo "${JAVA_NAME_2}"
}

test_do_set_jre8_no_previous_default() {
  create_valid_jre8_env "${JAVA_NAME}"
  $(do_set "${JAVA_NAME}/jre")
  assertEquals 'Wrong status returned' 0 $?
  assertDefaultSetTo "${JAVA_NAME}/jre"
}

test_do_set_jre9_no_previous_default() {
  create_valid_jre9_env "${JAVA_NAME}"
  $(do_set "${JAVA_NAME}")
  assertEquals 'Wrong status returned' 0 $?
  assertDefaultSetTo "${JAVA_NAME}"
}

test_do_set_jdk9_no_previous_default() {
  create_valid_jre9_jdk9_env "${JAVA_NAME}"
  $(do_set "${JAVA_NAME}")
  assertEquals 'Wrong status returned' 0 $?
  assertDefaultSetTo "${JAVA_NAME}"
}

test_do_set_jre8_while_jdk8_also_exists() {
  create_valid_jre8_jdk8_env "${JAVA_NAME}"
  output=$(do_set "${JAVA_NAME}/jre")
  assertEquals 'Wrong status returned' 0 $?
  assertDefaultSetTo "${JAVA_NAME}/jre"
  #mess="Warning: '${JAVA_NAME}' looks like a valid JDK whereas you only set '${JAVA_NAME}/jre' as default"
  #mess+="\nFix this with 'parabola-java set ${JAVA_NAME}'"
  #expected=$(echo -e "${mess}")
  #assertEquals 'Wrong message' "${expected}" "${output}"
}

test_do_set_jdk8_cleanup_old_jre8_default() {
  create_valid_jre8_jdk8_env "${JAVA_NAME}"
  set_default_for_test "${JAVA_NAME}"
  output=$(do_set "${JAVA_NAME}/jre")
  assertEquals 'Wrong status returned' 0 $?
  assertDefaultSetTo "${JAVA_NAME}/jre"
}

test_do_set_jdk9_cleanup_old_jdk8_default() {
  JAVA8_NAME=$(get_rand_str)
  create_valid_jre8_jdk8_env "${JAVA8_NAME}"
  set_default_for_test "${JAVA8_NAME}"
  JAVA9_NAME=$(get_rand_str)
  create_valid_jre9_jdk9_env "${JAVA9_NAME}"
  output=$(do_set "${JAVA9_NAME}")
  assertEquals 'Wrong status returned' 0 $?
  assertDefaultSetTo "${JAVA9_NAME}"
}

test_do_set_jdk8_devnull() {
  create_valid_jre8_jdk8_env "${JAVA_NAME}"
  set_default_for_test "/dev/null"
  output=$(do_set "${JAVA_NAME}/jre")
  assertEquals 'Wrong status returned' 0 $?
  assertDefaultSetTo "${JAVA_NAME}/jre"
}

test_do_set_jdk9_devnull() {
  create_valid_jre9_jdk9_env "${JAVA_NAME}"
  set_default_for_test "/dev/null"
  output=$(do_set "${JAVA_NAME}")
  assertEquals 'Wrong status returned' 0 $?
  assertDefaultSetTo "${JAVA_NAME}"
}

# do_unset

test_do_unset_jre8() {
  create_valid_jre8_env "${JAVA_NAME}"
  set_default_for_test "${JAVA_NAME}/jre"
  do_unset
  assertDefaultNotSet
}

test_do_unset_no_default_link() {
  create_valid_jre8_jdk8_env "${JAVA_NAME}"
  set_default_for_test "${JAVA_NAME}"
  unlink ${DEFAULT_PATH}
  do_unset
  assertDefaultNotSet
}

test_do_unset_devnull() {
  set_default_for_test "/dev/null"
  do_unset
  assertDefaultNotSet
}

test_do_unset_jre9() {
  create_valid_jre9_env "${JAVA_NAME}"
  set_default_for_test "${JAVA_NAME}"
  do_unset
  assertDefaultNotSet
}

test_do_unset_jdk9() {
  create_valid_jre9_jdk9_env "${JAVA_NAME}"
  set_default_for_test "${JAVA_NAME}"
  do_unset
  assertDefaultNotSet
}

# do_fix

test_do_fix_default_valid_jre8() {
  create_valid_jre8_env "${JAVA_NAME}"
  set_default_for_test "${JAVA_NAME}/jre"
  do_fix
  assertDefaultSetTo "${JAVA_NAME}/jre"
}

test_do_fix_default_valid_jre9() {
  create_valid_jre9_env "${JAVA_NAME}"
  set_default_for_test "${JAVA_NAME}"
  do_fix
  assertDefaultSetTo "${JAVA_NAME}"
}

test_do_fix_default_valid_jdk9() {
  create_valid_jre9_jdk9_env "${JAVA_NAME}"
  set_default_for_test "${JAVA_NAME}"
  do_fix
  assertDefaultSetTo "${JAVA_NAME}"
}

test_do_fix_no_default_jre8() {
  create_valid_jre8_env "${JAVA_NAME}"
  do_fix
  assertDefaultSetTo "${JAVA_NAME}/jre"
}

test_do_fix_no_default_jre9() {
  create_valid_jre9_env "${JAVA_NAME}"
  do_fix
  assertDefaultSetTo "${JAVA_NAME}"
}

test_do_fix_no_default_jdk9() {
  create_valid_jre9_jdk9_env "${JAVA_NAME}"
  do_fix
  assertDefaultSetTo "${JAVA_NAME}"
}

test_do_fix_default_invalid_openjdk7_jdk_installed() {
  create_valid_jre8_jdk8_env "java-8-openjdk"
  create_valid_jre8_jdk8_env "${JAVA_NAME}"
  do_fix
  assertDefaultSetTo "java-8-openjdk"
}

test_do_fix_jdk8_not_default_but_openjdk7_jre_installed() {
  create_valid_jre8_jdk8_env "${JAVA_NAME}"
  create_valid_jre8_env "java-8-openjdk"
  do_fix
  assertDefaultSetTo "java-8-openjdk/jre"
}

test_do_fix_jdk9_not_default_but_openjdk7_jre_installed() {
  create_valid_jre9_jdk9_env "${JAVA_NAME}"
  create_valid_jre8_env "java-8-openjdk"
  do_fix
  assertDefaultSetTo "java-8-openjdk/jre"
}

test_do_fix_default_invalid_random_java8_installed() {
  create_valid_jre8_jdk8_env "${JAVA_NAME}"
  do_fix
  assertDefaultSetTo "${JAVA_NAME}"
}

test_do_fix_default_invalid_random_java9_installed() {
  create_valid_jre9_jdk9_env "${JAVA_NAME}"
  do_fix
  assertDefaultSetTo "${JAVA_NAME}"
}

test_do_fix_default_invalid_no_java_installed() {
  assertEquals 'Wrong message' "No valid Java environment found" "$(do_fix)"
  assertDefaultNotSet
}

test_do_fix_jre8_but_jdk8_exists() {
  create_valid_jre8_jdk8_env "${JAVA_NAME}"
  set_default_for_test "${JAVA_NAME}/jre"
  do_fix
  assertDefaultSetTo "${JAVA_NAME}"
}

test_do_fix_jdk_but_jre_exists() {
  create_valid_jre8_jdk8_env "java-7-openjdk"
  create_valid_jre8_env "${JAVA_NAME}"
  # Only JRE is installed but setting JDK as default
  set_default_for_test "${JAVA_NAME}"
  do_fix
  assertDefaultSetTo "${JAVA_NAME}/jre"
}

test_do_fix_devnull() {
  create_valid_jre8_jdk8_env "${JAVA_NAME}"
  set_default_for_test "/dev/null"
  do_fix
  assertDefaultSetTo "${JAVA_NAME}"
}

# load shunit2
. shunit2/src/shunit2
