godot/tests/scene/test_packed_scene.h

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/*  test_packed_scene.h                                                   */
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#ifndef TEST_PACKED_SCENE_H
#define TEST_PACKED_SCENE_H

#include "scene/resources/packed_scene.h"

#include "tests/test_macros.h"

namespace TestPackedScene {

TEST_CASE("[PackedScene] Pack Scene and Retrieve State") {
	// Create a scene to pack.
	Node *scene = memnew(Node);
	scene->set_name("TestScene");

	// Pack the scene.
	PackedScene packed_scene;
	const Error err = packed_scene.pack(scene);
	CHECK(err == OK);

	// Retrieve the packed state.
	Ref<SceneState> state = packed_scene.get_state();
	CHECK(state.is_valid());
	CHECK(state->get_node_count() == 1);
	CHECK(state->get_node_name(0) == "TestScene");

	memdelete(scene);
}

TEST_CASE("[PackedScene] Signals Preserved when Packing Scene") {
	// Create main scene
	// root
	// `- sub_node (local)
	// `- sub_scene (instance of another scene)
	//    `- sub_scene_node (owned by sub_scene)
	Node *main_scene_root = memnew(Node);
	Node *sub_node = memnew(Node);
	Node *sub_scene_root = memnew(Node);
	Node *sub_scene_node = memnew(Node);

	main_scene_root->add_child(sub_node);
	sub_node->set_owner(main_scene_root);

	sub_scene_root->add_child(sub_scene_node);
	sub_scene_node->set_owner(sub_scene_root);

	main_scene_root->add_child(sub_scene_root);
	sub_scene_root->set_owner(main_scene_root);

	SUBCASE("Signals that should be saved") {
		int main_flags = Object::CONNECT_PERSIST;
		// sub node to a node in main scene
		sub_node->connect("ready", callable_mp(main_scene_root, &Node::is_ready), main_flags);
		// subscene root to a node in main scene
		sub_scene_root->connect("ready", callable_mp(main_scene_root, &Node::is_ready), main_flags);
		//subscene root to subscene root (connected within main scene)
		sub_scene_root->connect("ready", callable_mp(sub_scene_root, &Node::is_ready), main_flags);

		// Pack the scene.
		Ref<PackedScene> packed_scene;
		packed_scene.instantiate();
		const Error err = packed_scene->pack(main_scene_root);
		CHECK(err == OK);

		// Make sure the right connections are in packed scene.
		Ref<SceneState> state = packed_scene->get_state();
		CHECK_EQ(state->get_connection_count(), 3);
	}

	/*
	// FIXME: This subcase requires GH-48064 to be fixed.
	SUBCASE("Signals that should not be saved") {
		int subscene_flags = Object::CONNECT_PERSIST | Object::CONNECT_INHERITED;
		// subscene node to itself
		sub_scene_node->connect("ready", callable_mp(sub_scene_node, &Node::is_ready), subscene_flags);
		// subscene node to subscene root
		sub_scene_node->connect("ready", callable_mp(sub_scene_root, &Node::is_ready), subscene_flags);
		//subscene root to subscene root (connected within sub scene)
		sub_scene_root->connect("ready", callable_mp(sub_scene_root, &Node::is_ready), subscene_flags);

		// Pack the scene.
		Ref<PackedScene> packed_scene;
		packed_scene.instantiate();
		const Error err = packed_scene->pack(main_scene_root);
		CHECK(err == OK);

		// Make sure the right connections are in packed scene.
		Ref<SceneState> state = packed_scene->get_state();
		CHECK_EQ(state->get_connection_count(), 0);
	}
	*/

	memdelete(main_scene_root);
}

TEST_CASE("[PackedScene] Clear Packed Scene") {
	// Create a scene to pack.
	Node *scene = memnew(Node);
	scene->set_name("TestScene");

	// Pack the scene.
	PackedScene packed_scene;
	packed_scene.pack(scene);

	// Clear the packed scene.
	packed_scene.clear();

	// Check if it has been cleared.
	Ref<SceneState> state = packed_scene.get_state();
	CHECK_FALSE(state->get_node_count() == 1);

	memdelete(scene);
}

TEST_CASE("[PackedScene] Can Instantiate Packed Scene") {
	// Create a scene to pack.
	Node *scene = memnew(Node);
	scene->set_name("TestScene");

	// Pack the scene.
	PackedScene packed_scene;
	packed_scene.pack(scene);

	// Check if the packed scene can be instantiated.
	const bool can_instantiate = packed_scene.can_instantiate();
	CHECK(can_instantiate == true);

	memdelete(scene);
}

TEST_CASE("[PackedScene] Instantiate Packed Scene") {
	// Create a scene to pack.
	Node *scene = memnew(Node);
	scene->set_name("TestScene");

	// Pack the scene.
	PackedScene packed_scene;
	packed_scene.pack(scene);

	// Instantiate the packed scene.
	Node *instance = packed_scene.instantiate();
	CHECK(instance != nullptr);
	CHECK(instance->get_name() == "TestScene");

	memdelete(scene);
	memdelete(instance);
}

TEST_CASE("[PackedScene] Instantiate Packed Scene With Children") {
	// Create a scene to pack.
	Node *scene = memnew(Node);
	scene->set_name("TestScene");

	// Add persisting child nodes to the scene.
	Node *child1 = memnew(Node);
	child1->set_name("Child1");
	scene->add_child(child1);
	child1->set_owner(scene);

	Node *child2 = memnew(Node);
	child2->set_name("Child2");
	scene->add_child(child2);
	child2->set_owner(scene);

	// Add non persisting child node to the scene.
	Node *child3 = memnew(Node);
	child3->set_name("Child3");
	scene->add_child(child3);

	// Pack the scene.
	PackedScene packed_scene;
	packed_scene.pack(scene);

	// Instantiate the packed scene.
	Node *instance = packed_scene.instantiate();
	CHECK(instance != nullptr);
	CHECK(instance->get_name() == "TestScene");

	// Validate the child nodes of the instantiated scene.
	CHECK(instance->get_child_count() == 2);
	CHECK(instance->get_child(0)->get_name() == "Child1");
	CHECK(instance->get_child(1)->get_name() == "Child2");
	CHECK(instance->get_child(0)->get_owner() == instance);
	CHECK(instance->get_child(1)->get_owner() == instance);

	memdelete(scene);
	memdelete(instance);
}

TEST_CASE("[PackedScene] Set Path") {
	// Create a scene to pack.
	Node *scene = memnew(Node);
	scene->set_name("TestScene");

	// Pack the scene.
	PackedScene packed_scene;
	packed_scene.pack(scene);

	// Set a new path for the packed scene.
	const String new_path = "NewTestPath";
	packed_scene.set_path(new_path);

	// Check if the path has been set correctly.
	Ref<SceneState> state = packed_scene.get_state();
	CHECK(state.is_valid());
	CHECK(state->get_path() == new_path);

	memdelete(scene);
}

TEST_CASE("[PackedScene] Replace State") {
	// Create a scene to pack.
	Node *scene = memnew(Node);
	scene->set_name("TestScene");

	// Pack the scene.
	PackedScene packed_scene;
	packed_scene.pack(scene);

	// Create another scene state to replace with.
	Ref<SceneState> new_state = memnew(SceneState);
	new_state->set_path("NewPath");

	// Replace the state.
	packed_scene.replace_state(new_state);

	// Check if the state has been replaced.
	Ref<SceneState> state = packed_scene.get_state();
	CHECK(state.is_valid());
	CHECK(state == new_state);

	memdelete(scene);
}

TEST_CASE("[PackedScene] Recreate State") {
	// Create a scene to pack.
	Node *scene = memnew(Node);
	scene->set_name("TestScene");

	// Pack the scene.
	PackedScene packed_scene;
	packed_scene.pack(scene);

	// Recreate the state.
	packed_scene.recreate_state();

	// Check if the state has been recreated.
	Ref<SceneState> state = packed_scene.get_state();
	CHECK(state.is_valid());
	CHECK(state->get_node_count() == 0); // Since the state was recreated, it should be empty.

	memdelete(scene);
}

} // namespace TestPackedScene

#endif // TEST_PACKED_SCENE_H