implemented feedback from @lonkaars

1 files changed, 174 insertions, 0 deletions

diff --git a/src/test/RenderSystemTest.cpp b/src/test/RenderSystemTest.cpp
new file mode 100644
index 0000000..ac479d3
--- /dev/null
+++ b/src/test/RenderSystemTest.cpp
@@ -0,0 +1,174 @@
+#include "api/Camera.h"
+#include <functional>
+#include <gtest/gtest.h>
+#include <memory>
+#include <vector>
+
+#define private public
+#define protected public
+
+#include <crepe/ComponentManager.h>
+#include <crepe/api/Color.h>
+#include <crepe/api/GameObject.h>
+#include <crepe/api/Sprite.h>
+#include <crepe/api/Texture.h>
+
+#include <crepe/system/RenderSystem.h>
+
+using namespace std;
+using namespace crepe;
+using namespace testing;
+
+class RenderSystemTest : public Test {
+public:
+	ComponentManager mgr{};
+	RenderSystem sys{mgr};
+	GameObject entity1 = this->mgr.new_object("name");
+	GameObject entity2 = this->mgr.new_object("name");
+	GameObject entity3 = this->mgr.new_object("name");
+	GameObject entity4 = this->mgr.new_object("name");
+
+	void SetUp() override {
+		auto & sprite1
+			= entity1.add_component<Sprite>(make_shared<Texture>("../asset/texture/img.png"),
+											Color(0, 0, 0, 0), FlipSettings{false, false});
+		ASSERT_NE(sprite1.sprite_image.get(), nullptr);
+		sprite1.order_in_layer = 5;
+		sprite1.sorting_in_layer = 5;
+		EXPECT_EQ(sprite1.order_in_layer, 5);
+		EXPECT_EQ(sprite1.sorting_in_layer, 5);
+		auto & sprite2
+			= entity2.add_component<Sprite>(make_shared<Texture>("../asset/texture/img.png"),
+											Color(0, 0, 0, 0), FlipSettings{false, false});
+		ASSERT_NE(sprite2.sprite_image.get(), nullptr);
+		sprite2.sorting_in_layer = 2;
+		sprite2.order_in_layer = 1;
+
+		EXPECT_EQ(sprite2.sorting_in_layer, 2);
+		EXPECT_EQ(sprite2.order_in_layer, 1);
+
+		auto & sprite3
+			= entity3.add_component<Sprite>(make_shared<Texture>("../asset/texture/img.png"),
+											Color(0, 0, 0, 0), FlipSettings{false, false});
+		ASSERT_NE(sprite3.sprite_image.get(), nullptr);
+		sprite3.sorting_in_layer = 1;
+		sprite3.order_in_layer = 2;
+
+		EXPECT_EQ(sprite3.sorting_in_layer, 1);
+		EXPECT_EQ(sprite3.order_in_layer, 2);
+
+		auto & sprite4
+			= entity4.add_component<Sprite>(make_shared<Texture>("../asset/texture/img.png"),
+											Color(0, 0, 0, 0), FlipSettings{false, false});
+		ASSERT_NE(sprite4.sprite_image.get(), nullptr);
+		sprite4.sorting_in_layer = 1;
+		sprite4.order_in_layer = 1;
+		EXPECT_EQ(sprite4.sorting_in_layer, 1);
+		EXPECT_EQ(sprite4.order_in_layer, 1);
+	}
+};
+
+TEST_F(RenderSystemTest, expected_throws) {
+	GameObject entity1 = this->mgr.new_object("NAME");
+
+	// no texture img
+	EXPECT_ANY_THROW({
+		entity1.add_component<Sprite>(make_shared<Texture>("NO_IMAGE"), Color(0, 0, 0, 0),
+									  FlipSettings{false, false});
+	});
+
+	// No camera
+	EXPECT_ANY_THROW({ this->sys.update(); });
+}
+
+TEST_F(RenderSystemTest, make_sprites) {}
+
+TEST_F(RenderSystemTest, sorting_sprites) {
+	vector<reference_wrapper<Sprite>> sprites = this->mgr.get_components_by_type<Sprite>();
+	ASSERT_EQ(sprites.size(), 4);
+
+	vector<reference_wrapper<Sprite>> sorted_sprites = this->sys.sort(sprites);
+	ASSERT_EQ(sorted_sprites.size(), 4);
+
+	// Expected order after sorting:
+	// 1. sorting_in_layer: 1, order_in_layer: 1 (entity4)
+	// 2. sorting_in_layer: 1, order_in_layer: 2 (entity3)
+	// 3. sorting_in_layer: 2, order_in_layer: 1 (entity2)
+	// 4. sorting_in_layer: 5, order_in_layer: 5 (entity1)
+
+	EXPECT_EQ(sorted_sprites[0].get().sorting_in_layer, 1);
+	EXPECT_EQ(sorted_sprites[0].get().order_in_layer, 1);
+
+	EXPECT_EQ(sorted_sprites[1].get().sorting_in_layer, 1);
+	EXPECT_EQ(sorted_sprites[1].get().order_in_layer, 2);
+
+	EXPECT_EQ(sorted_sprites[2].get().sorting_in_layer, 2);
+	EXPECT_EQ(sorted_sprites[2].get().order_in_layer, 1);
+
+	EXPECT_EQ(sorted_sprites[3].get().sorting_in_layer, 5);
+	EXPECT_EQ(sorted_sprites[3].get().order_in_layer, 5);
+
+	for (size_t i = 1; i < sorted_sprites.size(); ++i) {
+		const Sprite & prev = sorted_sprites[i - 1].get();
+		const Sprite & curr = sorted_sprites[i].get();
+
+		if (prev.sorting_in_layer == curr.sorting_in_layer) {
+			EXPECT_LE(prev.order_in_layer, curr.order_in_layer);
+		} else {
+			EXPECT_LE(prev.sorting_in_layer, curr.sorting_in_layer);
+		}
+	}
+}
+
+TEST_F(RenderSystemTest, Update) {
+	entity1.add_component<Camera>(Color::WHITE);
+	{
+		vector<reference_wrapper<Sprite>> sprites = this->mgr.get_components_by_type<Sprite>();
+		ASSERT_EQ(sprites.size(), 4);
+
+		EXPECT_EQ(sprites[0].get().game_object_id, 0);
+		EXPECT_EQ(sprites[1].get().game_object_id, 1);
+		EXPECT_EQ(sprites[2].get().game_object_id, 2);
+		EXPECT_EQ(sprites[3].get().game_object_id, 3);
+	}
+	this->sys.update();
+	{
+		vector<reference_wrapper<Sprite>> sprites = this->mgr.get_components_by_type<Sprite>();
+		ASSERT_EQ(sprites.size(), 4);
+
+		EXPECT_EQ(sprites[0].get().game_object_id, 0);
+		EXPECT_EQ(sprites[1].get().game_object_id, 1);
+		EXPECT_EQ(sprites[2].get().game_object_id, 2);
+		EXPECT_EQ(sprites[3].get().game_object_id, 3);
+	}
+}
+
+TEST_F(RenderSystemTest, Camera) {
+	{
+		auto cameras = this->mgr.get_components_by_type<Camera>();
+		EXPECT_NE(cameras.size(), 1);
+	}
+	{
+		entity1.add_component<Camera>(Color::WHITE);
+		auto cameras = this->mgr.get_components_by_type<Camera>();
+		EXPECT_EQ(cameras.size(), 1);
+	}
+
+	//TODO improve with newer version
+}
+TEST_F(RenderSystemTest, Color) {
+	entity1.add_component<Camera>(Color::WHITE);
+	auto & sprite = this->mgr.get_components_by_id<Sprite>(entity1.id).front().get();
+	ASSERT_NE(sprite.sprite_image.get(), nullptr);
+
+	sprite.color = Color::GREEN;
+	EXPECT_EQ(sprite.color.r, Color::GREEN.r);
+	EXPECT_EQ(sprite.color.g, Color::GREEN.g);
+	EXPECT_EQ(sprite.color.b, Color::GREEN.b);
+	EXPECT_EQ(sprite.color.a, Color::GREEN.a);
+	this->sys.update();
+	EXPECT_EQ(sprite.color.r, Color::GREEN.r);
+	EXPECT_EQ(sprite.color.g, Color::GREEN.g);
+	EXPECT_EQ(sprite.color.b, Color::GREEN.b);
+	EXPECT_EQ(sprite.color.a, Color::GREEN.a);
+}