merge `master` into `loek/util`

7 files changed, 360 insertions, 186 deletions

diff --git a/src/example/CMakeLists.txt b/src/example/CMakeLists.txt
index 3a5b543..30432e5 100644
--- a/src/example/CMakeLists.txt
+++ b/src/example/CMakeLists.txt
@@ -17,7 +17,6 @@ function(add_example target_name)
 endfunction()
 
 add_example(audio_internal)
-# add_example(components_internal)
 add_example(script)
 add_example(log)
 add_example(rendering)
@@ -26,8 +25,6 @@ add_example(physics)
 add_example(savemgr)
 add_example(proxy)
 add_example(db)
-add_example(ecs)
-add_example(scene_manager)
 add_example(particles)
 add_example(gameloop)
 
diff --git a/src/example/components_internal.cpp b/src/example/components_internal.cpp
deleted file mode 100644
index 2a232a9..0000000
--- a/src/example/components_internal.cpp
+++ /dev/null
@@ -1,51 +0,0 @@
-/** \file
- * 
- * Standalone example for usage of the internal ECS
- */
-
-#include <cassert>
-#include <chrono>
-
-#include <crepe/Component.h>
-#include <crepe/ComponentManager.h>
-
-#include <crepe/api/GameObject.h>
-#include <crepe/api/Rigidbody.h>
-#include <crepe/api/Sprite.h>
-
-#include <crepe/util/Log.h>
-
-using namespace crepe;
-using namespace std;
-
-#define OBJ_COUNT 100000
-
-int main() {
-	dbg_trace();
-
-	ComponentManager mgr{};
-
-	auto start_adding = chrono::high_resolution_clock::now();
-
-	for (int i = 0; i < OBJ_COUNT; ++i) {
-		GameObject obj = mgr.new_object("Name", "Tag");
-		obj.add_component<Sprite>("test");
-		obj.add_component<Rigidbody>(0, 0, i);
-	}
-
-	auto stop_adding = chrono::high_resolution_clock::now();
-
-	auto sprites = mgr.get_components_by_type<Sprite>();
-	for (auto sprite : sprites) {
-		assert(true);
-	}
-
-	auto stop_looping = chrono::high_resolution_clock::now();
-
-	auto add_time = chrono::duration_cast<chrono::microseconds>(stop_adding - start_adding);
-	auto loop_time = chrono::duration_cast<chrono::microseconds>(stop_looping - stop_adding);
-	printf("add time:  %ldus\n", add_time.count());
-	printf("loop time: %ldus\n", loop_time.count());
-
-	return 0;
-}
diff --git a/src/example/ecs.cpp b/src/example/ecs.cpp
deleted file mode 100644
index d5ba51b..0000000
--- a/src/example/ecs.cpp
+++ /dev/null
@@ -1,53 +0,0 @@
-#include <iostream>
-
-#include <crepe/ComponentManager.h>
-#include <crepe/api/GameObject.h>
-#include <crepe/api/Metadata.h>
-#include <crepe/api/Transform.h>
-
-using namespace crepe;
-using namespace std;
-
-int main() {
-	ComponentManager mgr{};
-
-	// Create a few GameObjects
-	try {
-		GameObject body = mgr.new_object("body", "person", Vector2{0, 0}, 0, 1);
-		GameObject right_leg = mgr.new_object("rightLeg", "person", Vector2{1, 1}, 0, 1);
-		GameObject left_leg = mgr.new_object("leftLeg", "person", Vector2{1, 1}, 0, 1);
-		GameObject right_foot = mgr.new_object("rightFoot", "person", Vector2{2, 2}, 0, 1);
-		GameObject left_foot = mgr.new_object("leftFoot", "person", Vector2{2, 2}, 0, 1);
-
-		// Set the parent of each GameObject
-		right_foot.set_parent(right_leg);
-		left_foot.set_parent(left_leg);
-		right_leg.set_parent(body);
-		left_leg.set_parent(body);
-
-		// Adding a second Transform component is not allowed and will invoke an exception
-		body.add_component<Transform>(Vector2{10, 10}, 0, 1);
-	} catch (const exception & e) {
-		cerr << e.what() << endl;
-	}
-
-	// Get the Metadata and Transform components of each GameObject
-	vector<reference_wrapper<Metadata>> metadata = mgr.get_components_by_type<Metadata>();
-	vector<reference_wrapper<Transform>> transform = mgr.get_components_by_type<Transform>();
-
-	// Print the Metadata and Transform components
-	for (auto & m : metadata) {
-		cout << "Id: " << m.get().game_object_id << " Name: " << m.get().name
-			 << " Tag: " << m.get().tag << " Parent: " << m.get().parent << " Children: ";
-		for (auto & c : m.get().children) {
-			cout << c << " ";
-		}
-		cout << endl;
-	}
-	for (auto & t : transform) {
-		cout << "Id: " << t.get().game_object_id << " Position: [" << t.get().position.x
-			 << ", " << t.get().position.y << "]" << endl;
-	}
-
-	return 0;
-}
diff --git a/src/example/scene_manager.cpp b/src/example/scene_manager.cpp
deleted file mode 100644
index accec7d..0000000
--- a/src/example/scene_manager.cpp
+++ /dev/null
@@ -1,79 +0,0 @@
-#include <iostream>
-
-#include <crepe/ComponentManager.h>
-#include <crepe/api/GameObject.h>
-#include <crepe/api/Metadata.h>
-#include <crepe/api/Scene.h>
-#include <crepe/api/SceneManager.h>
-#include <crepe/api/Vector2.h>
-
-using namespace crepe;
-using namespace std;
-
-class ConcreteScene1 : public Scene {
-public:
-	using Scene::Scene;
-
-	void load_scene() {
-		auto & mgr = this->component_manager;
-		GameObject object1 = mgr.new_object("scene_1", "tag_scene_1", Vector2{0, 0}, 0, 1);
-		GameObject object2 = mgr.new_object("scene_1", "tag_scene_1", Vector2{1, 0}, 0, 1);
-		GameObject object3 = mgr.new_object("scene_1", "tag_scene_1", Vector2{2, 0}, 0, 1);
-	}
-};
-
-class ConcreteScene2 : public Scene {
-public:
-	using Scene::Scene;
-
-	void load_scene() {
-		auto & mgr = this->component_manager;
-		GameObject object1 = mgr.new_object("scene_2", "tag_scene_2", Vector2{0, 0}, 0, 1);
-		GameObject object2 = mgr.new_object("scene_2", "tag_scene_2", Vector2{0, 1}, 0, 1);
-		GameObject object3 = mgr.new_object("scene_2", "tag_scene_2", Vector2{0, 2}, 0, 1);
-		GameObject object4 = mgr.new_object("scene_2", "tag_scene_2", Vector2{0, 3}, 0, 1);
-	}
-};
-
-int main() {
-	ComponentManager component_mgr{};
-	SceneManager scene_mgr{component_mgr};
-
-	// Add the scenes to the scene manager
-	scene_mgr.add_scene<ConcreteScene1>("scene1");
-	scene_mgr.add_scene<ConcreteScene2>("scene2");
-
-	// There is no need to call set_next_scene() at the beginnen, because the first scene will be
-	// automatically set as the next scene
-
-	// Load scene1 (the first scene added)
-	scene_mgr.load_next_scene();
-
-	// Get the Metadata components of each GameObject of Scene1
-	vector<reference_wrapper<Metadata>> metadata
-		= component_mgr.get_components_by_type<Metadata>();
-
-	cout << "Metadata components of Scene1:" << endl;
-	// Print the Metadata
-	for (auto & m : metadata) {
-		cout << "Id: " << m.get().game_object_id << " Name: " << m.get().name
-			 << " Tag: " << m.get().tag << endl;
-	}
-
-	// Set scene2 as the next scene
-	scene_mgr.set_next_scene("scene2");
-	// Load scene2
-	scene_mgr.load_next_scene();
-
-	// Get the Metadata components of each GameObject of Scene2
-	metadata = component_mgr.get_components_by_type<Metadata>();
-
-	cout << "Metadata components of Scene2:" << endl;
-	// Print the Metadata
-	for (auto & m : metadata) {
-		cout << "Id: " << m.get().game_object_id << " Name: " << m.get().name
-			 << " Tag: " << m.get().tag << endl;
-	}
-
-	return 0;
-}
diff --git a/src/test/CMakeLists.txt b/src/test/CMakeLists.txt
index f6e1dbb..f189e3d 100644
--- a/src/test/CMakeLists.txt
+++ b/src/test/CMakeLists.txt
@@ -6,5 +6,7 @@ target_sources(test_main PUBLIC
 	AssetTest.cpp
 	OptionalRefTest.cpp
 	RenderSystemTest.cpp
+	ECSTest.cpp
+	SceneManagerTest.cpp
 )
 
diff --git a/src/test/ECSTest.cpp b/src/test/ECSTest.cpp
new file mode 100644
index 0000000..d5a5826
--- /dev/null
+++ b/src/test/ECSTest.cpp
@@ -0,0 +1,236 @@
+#include <gtest/gtest.h>
+
+#define protected public
+
+#include <crepe/ComponentManager.h>
+#include <crepe/api/GameObject.h>
+#include <crepe/api/Metadata.h>
+#include <crepe/api/Transform.h>
+#include <crepe/api/Vector2.h>
+
+using namespace std;
+using namespace crepe;
+
+class ECSTest : public ::testing::Test {
+public:
+	ComponentManager mgr{};
+};
+
+TEST_F(ECSTest, createGameObject) {
+	GameObject obj = mgr.new_object("body", "person", Vector2{0, 0}, 0, 1);
+
+	vector<reference_wrapper<Metadata>> metadata = mgr.get_components_by_type<Metadata>();
+	vector<reference_wrapper<Transform>> transform = mgr.get_components_by_type<Transform>();
+
+	EXPECT_EQ(metadata.size(), 1);
+	EXPECT_EQ(transform.size(), 1);
+
+	EXPECT_EQ(metadata[0].get().name, "body");
+	EXPECT_EQ(metadata[0].get().tag, "person");
+	EXPECT_EQ(metadata[0].get().parent, -1);
+	EXPECT_EQ(metadata[0].get().children.size(), 0);
+
+	EXPECT_EQ(transform[0].get().position.x, 0);
+	EXPECT_EQ(transform[0].get().position.y, 0);
+	EXPECT_EQ(transform[0].get().rotation, 0);
+	EXPECT_EQ(transform[0].get().scale, 1);
+}
+
+TEST_F(ECSTest, deleteAllGameObjects) {
+	GameObject obj0 = mgr.new_object("body", "person", Vector2{0, 0}, 0, 1);
+	GameObject obj1 = mgr.new_object("body", "person", Vector2{0, 0}, 0, 1);
+
+	mgr.delete_all_components();
+
+	vector<reference_wrapper<Metadata>> metadata = mgr.get_components_by_type<Metadata>();
+	vector<reference_wrapper<Transform>> transform = mgr.get_components_by_type<Transform>();
+
+	EXPECT_EQ(metadata.size(), 0);
+	EXPECT_EQ(transform.size(), 0);
+
+	GameObject obj2 = mgr.new_object("body2", "person2", Vector2{1, 0}, 5, 1);
+
+	metadata = mgr.get_components_by_type<Metadata>();
+	transform = mgr.get_components_by_type<Transform>();
+
+	EXPECT_EQ(metadata.size(), 1);
+	EXPECT_EQ(transform.size(), 1);
+
+	EXPECT_EQ(metadata[0].get().game_object_id, 0);
+	EXPECT_EQ(metadata[0].get().name, "body2");
+	EXPECT_EQ(metadata[0].get().tag, "person2");
+	EXPECT_EQ(metadata[0].get().parent, -1);
+	EXPECT_EQ(metadata[0].get().children.size(), 0);
+
+	EXPECT_EQ(transform[0].get().game_object_id, 0);
+	EXPECT_EQ(transform[0].get().position.x, 1);
+	EXPECT_EQ(transform[0].get().position.y, 0);
+	EXPECT_EQ(transform[0].get().rotation, 5);
+	EXPECT_EQ(transform[0].get().scale, 1);
+}
+
+TEST_F(ECSTest, deleteGameObject) {
+	GameObject obj0 = mgr.new_object("body", "person", Vector2{0, 0}, 0, 1);
+	GameObject obj1 = mgr.new_object("body", "person", Vector2{0, 0}, 0, 1);
+
+	mgr.delete_all_components_of_id(0);
+
+	vector<reference_wrapper<Metadata>> metadata = mgr.get_components_by_type<Metadata>();
+	vector<reference_wrapper<Transform>> transform = mgr.get_components_by_type<Transform>();
+
+	EXPECT_EQ(metadata.size(), 1);
+	EXPECT_EQ(transform.size(), 1);
+
+	EXPECT_EQ(metadata[0].get().game_object_id, 1);
+	EXPECT_EQ(metadata[0].get().name, "body");
+	EXPECT_EQ(metadata[0].get().tag, "person");
+	EXPECT_EQ(metadata[0].get().parent, -1);
+	EXPECT_EQ(metadata[0].get().children.size(), 0);
+
+	EXPECT_EQ(transform[0].get().game_object_id, 1);
+	EXPECT_EQ(transform[0].get().position.x, 0);
+	EXPECT_EQ(transform[0].get().position.y, 0);
+	EXPECT_EQ(transform[0].get().rotation, 0);
+	EXPECT_EQ(transform[0].get().scale, 1);
+}
+
+TEST_F(ECSTest, manyGameObjects) {
+	for (int i = 0; i < 5000; i++) {
+		GameObject obj = mgr.new_object("body", "person", Vector2{0, 0}, 0, i);
+	}
+
+	vector<reference_wrapper<Metadata>> metadata = mgr.get_components_by_type<Metadata>();
+	vector<reference_wrapper<Transform>> transform = mgr.get_components_by_type<Transform>();
+
+	EXPECT_EQ(metadata.size(), 5000);
+	EXPECT_EQ(transform.size(), 5000);
+	for (int i = 0; i < 5000; i++) {
+		EXPECT_EQ(metadata[i].get().game_object_id, i);
+		EXPECT_EQ(metadata[i].get().name, "body");
+		EXPECT_EQ(metadata[i].get().tag, "person");
+		EXPECT_EQ(metadata[i].get().parent, -1);
+		EXPECT_EQ(metadata[i].get().children.size(), 0);
+
+		EXPECT_EQ(transform[i].get().game_object_id, i);
+		EXPECT_EQ(transform[i].get().position.x, 0);
+		EXPECT_EQ(transform[i].get().position.y, 0);
+		EXPECT_EQ(transform[i].get().rotation, 0);
+		EXPECT_EQ(transform[i].get().scale, i);
+	}
+
+	mgr.delete_components<Metadata>();
+
+	metadata = mgr.get_components_by_type<Metadata>();
+	transform = mgr.get_components_by_type<Transform>();
+
+	EXPECT_EQ(metadata.size(), 0);
+	EXPECT_EQ(transform.size(), 5000);
+
+	for (int i = 0; i < 10000 - 5000; i++) {
+		string tag = "person" + to_string(i);
+		GameObject obj = mgr.new_object("body", tag, Vector2{0, 0}, i, 0);
+	}
+
+	metadata = mgr.get_components_by_type<Metadata>();
+	transform = mgr.get_components_by_type<Transform>();
+
+	EXPECT_EQ(metadata.size(), 10000 - 5000);
+	EXPECT_EQ(transform.size(), 10000);
+}
+
+TEST_F(ECSTest, getComponentsByID) {
+	GameObject obj0 = mgr.new_object("body", "person", Vector2{0, 0}, 0, 1);
+	GameObject obj1 = mgr.new_object("body", "person", Vector2{0, 0}, 0, 1);
+
+	vector<reference_wrapper<Metadata>> metadata = mgr.get_components_by_id<Metadata>(0);
+	vector<reference_wrapper<Transform>> transform = mgr.get_components_by_id<Transform>(1);
+
+	EXPECT_EQ(metadata.size(), 1);
+	EXPECT_EQ(transform.size(), 1);
+
+	EXPECT_EQ(metadata[0].get().game_object_id, 0);
+	EXPECT_EQ(metadata[0].get().name, "body");
+	EXPECT_EQ(metadata[0].get().tag, "person");
+	EXPECT_EQ(metadata[0].get().parent, -1);
+	EXPECT_EQ(metadata[0].get().children.size(), 0);
+
+	EXPECT_EQ(transform[0].get().game_object_id, 1);
+	EXPECT_EQ(transform[0].get().position.x, 0);
+	EXPECT_EQ(transform[0].get().position.y, 0);
+	EXPECT_EQ(transform[0].get().rotation, 0);
+	EXPECT_EQ(transform[0].get().scale, 1);
+}
+
+TEST_F(ECSTest, tooMuchComponents) {
+	try {
+		GameObject obj0 = mgr.new_object("body", "person", Vector2{0, 0}, 0, 1);
+		obj0.add_component<Transform>(Vector2{10, 10}, 0, 1);
+	} catch (const exception & e) {
+		EXPECT_EQ(e.what(),
+				  string("Exceeded maximum number of instances for this component type"));
+	}
+
+	try {
+		GameObject obj1 = mgr.new_object("body", "person", Vector2{0, 0}, 0, 1);
+		obj1.add_component<Metadata>("body", "person");
+	} catch (const exception & e) {
+		EXPECT_EQ(e.what(),
+				  string("Exceeded maximum number of instances for this component type"));
+	}
+
+	vector<reference_wrapper<Metadata>> metadata = mgr.get_components_by_type<Metadata>();
+
+	EXPECT_EQ(metadata.size(), 2);
+	EXPECT_EQ(metadata[0].get().name, "body");
+	EXPECT_EQ(metadata[1].get().name, "body");
+}
+
+TEST_F(ECSTest, partentChild) {
+	{
+		GameObject body = mgr.new_object("body", "person", Vector2{0, 0}, 0, 1);
+		GameObject right_leg = mgr.new_object("rightLeg", "person", Vector2{1, 1}, 0, 1);
+		GameObject left_leg = mgr.new_object("leftLeg", "person", Vector2{1, 1}, 0, 1);
+		GameObject right_foot = mgr.new_object("rightFoot", "person", Vector2{2, 2}, 0, 1);
+		GameObject left_foot = mgr.new_object("leftFoot", "person", Vector2{2, 2}, 0, 1);
+
+		// Set the parent of each GameObject
+		right_foot.set_parent(right_leg);
+		left_foot.set_parent(left_leg);
+		right_leg.set_parent(body);
+		left_leg.set_parent(body);
+	}
+
+	// Get the Metadata and Transform components of each GameObject
+	vector<reference_wrapper<Metadata>> metadata = mgr.get_components_by_type<Metadata>();
+
+	// Check IDs
+	EXPECT_EQ(metadata[0].get().game_object_id, 0);
+	EXPECT_EQ(metadata[1].get().game_object_id, 1);
+	EXPECT_EQ(metadata[2].get().game_object_id, 2);
+	EXPECT_EQ(metadata[3].get().game_object_id, 3);
+	EXPECT_EQ(metadata[4].get().game_object_id, 4);
+
+	// Check the parent-child relationships
+	EXPECT_EQ(metadata[0].get().name, "body");
+	EXPECT_EQ(metadata[1].get().name, "rightLeg");
+	EXPECT_EQ(metadata[2].get().name, "leftLeg");
+	EXPECT_EQ(metadata[3].get().name, "rightFoot");
+	EXPECT_EQ(metadata[4].get().name, "leftFoot");
+
+	EXPECT_EQ(metadata[0].get().parent, -1);
+	EXPECT_EQ(metadata[1].get().parent, 0);
+	EXPECT_EQ(metadata[2].get().parent, 0);
+	EXPECT_EQ(metadata[3].get().parent, 1);
+	EXPECT_EQ(metadata[4].get().parent, 2);
+
+	EXPECT_EQ(metadata[0].get().children.size(), 2);
+	EXPECT_EQ(metadata[1].get().children.size(), 1);
+	EXPECT_EQ(metadata[2].get().children.size(), 1);
+	EXPECT_EQ(metadata[3].get().children.size(), 0);
+	EXPECT_EQ(metadata[4].get().children.size(), 0);
+
+	EXPECT_EQ(metadata[0].get().children[0], 1);
+	EXPECT_EQ(metadata[0].get().children[1], 2);
+	EXPECT_EQ(metadata[1].get().children[0], 3);
+	EXPECT_EQ(metadata[2].get().children[0], 4);
+}
diff --git a/src/test/SceneManagerTest.cpp b/src/test/SceneManagerTest.cpp
new file mode 100644
index 0000000..69e1171
--- /dev/null
+++ b/src/test/SceneManagerTest.cpp
@@ -0,0 +1,122 @@
+#include <crepe/ComponentManager.h>
+#include <crepe/api/GameObject.h>
+#include <crepe/api/Metadata.h>
+#include <crepe/api/Scene.h>
+#include <crepe/api/SceneManager.h>
+#include <crepe/api/Transform.h>
+#include <crepe/api/Vector2.h>
+#include <gtest/gtest.h>
+
+using namespace std;
+using namespace crepe;
+
+class ConcreteScene1 : public Scene {
+public:
+	using Scene::Scene;
+
+	void load_scene() {
+		auto & mgr = this->component_manager;
+		GameObject object1 = mgr.new_object("scene_1", "tag_scene_1", Vector2{0, 0}, 0, 1);
+		GameObject object2 = mgr.new_object("scene_1", "tag_scene_1", Vector2{1, 0}, 0, 1);
+		GameObject object3 = mgr.new_object("scene_1", "tag_scene_1", Vector2{2, 0}, 0, 1);
+	}
+};
+
+class ConcreteScene2 : public Scene {
+public:
+	using Scene::Scene;
+
+	void load_scene() {
+		auto & mgr = this->component_manager;
+		GameObject object1 = mgr.new_object("scene_2", "tag_scene_2", Vector2{0, 0}, 0, 1);
+		GameObject object2 = mgr.new_object("scene_2", "tag_scene_2", Vector2{0, 1}, 0, 1);
+		GameObject object3 = mgr.new_object("scene_2", "tag_scene_2", Vector2{0, 2}, 0, 1);
+		GameObject object4 = mgr.new_object("scene_2", "tag_scene_2", Vector2{0, 3}, 0, 1);
+	}
+};
+
+class SceneManagerTest : public ::testing::Test {
+public:
+	ComponentManager component_mgr{};
+	SceneManager scene_mgr{component_mgr};
+};
+
+TEST_F(SceneManagerTest, loadScene) {
+	scene_mgr.add_scene<ConcreteScene1>("scene1");
+	scene_mgr.add_scene<ConcreteScene2>("scene2");
+
+	scene_mgr.load_next_scene();
+
+	vector<reference_wrapper<Metadata>> metadata
+		= component_mgr.get_components_by_type<Metadata>();
+	vector<reference_wrapper<Transform>> transform
+		= component_mgr.get_components_by_type<Transform>();
+
+	EXPECT_EQ(metadata.size(), 3);
+	EXPECT_EQ(transform.size(), 3);
+
+	EXPECT_EQ(metadata[0].get().game_object_id, 0);
+	EXPECT_EQ(metadata[0].get().name, "scene_1");
+	EXPECT_EQ(metadata[0].get().tag, "tag_scene_1");
+	EXPECT_EQ(metadata[0].get().parent, -1);
+	EXPECT_EQ(metadata[0].get().children.size(), 0);
+	EXPECT_EQ(transform[0].get().position.x, 0);
+	EXPECT_EQ(transform[0].get().position.y, 0);
+
+	EXPECT_EQ(metadata[1].get().game_object_id, 1);
+	EXPECT_EQ(metadata[1].get().name, "scene_1");
+	EXPECT_EQ(metadata[1].get().tag, "tag_scene_1");
+	EXPECT_EQ(metadata[1].get().parent, -1);
+	EXPECT_EQ(metadata[1].get().children.size(), 0);
+	EXPECT_EQ(transform[1].get().position.x, 1);
+	EXPECT_EQ(transform[1].get().position.y, 0);
+
+	EXPECT_EQ(metadata[2].get().game_object_id, 2);
+	EXPECT_EQ(metadata[2].get().name, "scene_1");
+	EXPECT_EQ(metadata[2].get().tag, "tag_scene_1");
+	EXPECT_EQ(metadata[2].get().parent, -1);
+	EXPECT_EQ(metadata[2].get().children.size(), 0);
+	EXPECT_EQ(transform[2].get().position.x, 2);
+	EXPECT_EQ(transform[2].get().position.y, 0);
+
+	scene_mgr.set_next_scene("scene2");
+	scene_mgr.load_next_scene();
+
+	metadata = component_mgr.get_components_by_type<Metadata>();
+	transform = component_mgr.get_components_by_type<Transform>();
+
+	EXPECT_EQ(metadata.size(), 4);
+	EXPECT_EQ(transform.size(), 4);
+
+	EXPECT_EQ(metadata[0].get().game_object_id, 0);
+	EXPECT_EQ(metadata[0].get().name, "scene_2");
+	EXPECT_EQ(metadata[0].get().tag, "tag_scene_2");
+	EXPECT_EQ(metadata[0].get().parent, -1);
+	EXPECT_EQ(metadata[0].get().children.size(), 0);
+	EXPECT_EQ(transform[0].get().position.x, 0);
+	EXPECT_EQ(transform[0].get().position.y, 0);
+
+	EXPECT_EQ(metadata[1].get().game_object_id, 1);
+	EXPECT_EQ(metadata[1].get().name, "scene_2");
+	EXPECT_EQ(metadata[1].get().tag, "tag_scene_2");
+	EXPECT_EQ(metadata[1].get().parent, -1);
+	EXPECT_EQ(metadata[1].get().children.size(), 0);
+	EXPECT_EQ(transform[1].get().position.x, 0);
+	EXPECT_EQ(transform[1].get().position.y, 1);
+
+	EXPECT_EQ(metadata[2].get().game_object_id, 2);
+	EXPECT_EQ(metadata[2].get().name, "scene_2");
+	EXPECT_EQ(metadata[2].get().tag, "tag_scene_2");
+	EXPECT_EQ(metadata[2].get().parent, -1);
+	EXPECT_EQ(metadata[2].get().children.size(), 0);
+	EXPECT_EQ(transform[2].get().position.x, 0);
+	EXPECT_EQ(transform[2].get().position.y, 2);
+
+	EXPECT_EQ(metadata[3].get().game_object_id, 3);
+	EXPECT_EQ(metadata[3].get().name, "scene_2");
+	EXPECT_EQ(metadata[3].get().tag, "tag_scene_2");
+	EXPECT_EQ(metadata[3].get().parent, -1);
+	EXPECT_EQ(metadata[3].get().children.size(), 0);
+	EXPECT_EQ(transform[3].get().position.x, 0);
+	EXPECT_EQ(transform[3].get().position.y, 3);
+}