From d3ebe5fea047001840b8c4c21893ad36fc7ad2d4 Mon Sep 17 00:00:00 2001
From: Nimac0 <iamnimaco@gmail.com>
Date: Mon, 29 Apr 2024 20:33:59 +0200
Subject: [PATCH] test(setup)

basic setup for googletest
---
 CMakeLists.txt             | 35 +++++++++++++-
 include/CollisionHandler.h |  2 +-
 unittests.cc               | 93 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 128 insertions(+), 2 deletions(-)
 create mode 100644 unittests.cc

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1905143..3b69e85 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,6 +15,15 @@ set(BUILD_SHARED_LIBS FALSE)
 set(SDL2MIXER_VENDORED ON)
 set(SDL2TTF_VENDORED ON)
 
+include(FetchContent)
+FetchContent_Declare(
+  googletest
+  URL https://github.com/google/googletest/archive/03597a01ee50ed33e9dfd640b249b4be3799d395.zip
+)
+
+set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
+FetchContent_MakeAvailable(googletest)
+
 add_subdirectory(extern/SDL EXCLUDE_FROM_ALL)
 add_subdirectory(extern/SDL_image EXCLUDE_FROM_ALL)
 add_subdirectory(extern/SDL_mixer EXCLUDE_FROM_ALL)
@@ -38,5 +47,29 @@ if(CMAKE_BUILD_TYPE MATCHES "Debug")
     target_link_libraries(${PROJECT_NAME} PRIVATE "-fsanitize=address")
 endif()
 
+file(COPY ${PROJECT_SOURCE_DIR}/assets DESTINATION ${PROJECT_BINARY_DIR})
 
-file(COPY ${PROJECT_SOURCE_DIR}/assets DESTINATION ${PROJECT_BINARY_DIR})
\ No newline at end of file
+
+enable_testing()
+
+add_executable(
+  unittests
+  unittests.cc
+  ${SOURCES}
+)
+
+target_include_directories(unittests PRIVATE ${PROJECT_INCLUDE_DIR}
+)
+
+target_link_libraries(
+  unittests
+  GTest::gtest_main
+  GTest::gmock_main
+  SDL2::SDL2-static
+  SDL2_image::SDL2_image-static
+  SDL2_mixer::SDL2_mixer-static
+  SDL2_ttf::SDL2_ttf-static
+)
+
+include(GoogleTest)
+gtest_discover_tests(unittests)
\ No newline at end of file
diff --git a/include/CollisionHandler.h b/include/CollisionHandler.h
index 1fdba31..0412cf5 100644
--- a/include/CollisionHandler.h
+++ b/include/CollisionHandler.h
@@ -30,7 +30,7 @@ public:
 
 	CollisionHandler(Manager& mManager) :
 		manager(mManager) { };
-	~CollisionHandler();
+	~CollisionHandler() {};
 
 	static IntersectionBitSet getIntersection( // intersections relative to entityA
 		Entity* entityA,
diff --git a/unittests.cc b/unittests.cc
new file mode 100644
index 0000000..fb1d94f
--- /dev/null
+++ b/unittests.cc
@@ -0,0 +1,93 @@
+#include <gtest/gtest.h>
+#include <gmock/gmock.h>
+#include <SDL_rect.h>
+
+#include "CollisionHandler.h"
+#include "Entity.h"
+#include "ColliderComponent.h"
+#include "Vector2D.h"
+
+class MockColliderComponent : public ColliderComponent {
+public:
+    MockColliderComponent() : ColliderComponent("") {
+
+    };
+
+    SDL_Rect collider;
+};
+
+class MockManager : public Manager {
+    // do nothing
+};
+
+class MockEntity : public Entity {
+public:
+    MockEntity() : Entity(*(new MockManager())) {
+        this->comp = MockColliderComponent();
+    };
+
+    MockColliderComponent comp;
+
+    template<typename T>
+    bool hasComponent() const {
+        return true; // Simplified for testing
+    }
+    
+    template<typename T>
+    T& getComponent() {
+        return comp;
+    }
+};
+
+// Test fixture
+class CollisionHandlerTest : public::testing::Test {
+public:
+    CollisionHandlerTest() {};
+    CollisionHandler collisionHandler = CollisionHandler(*(new MockManager()));
+    MockEntity entityA, entityB;
+    Vector2D posModA, posModB;
+
+    void SetUp() override {
+        // Initialize entities
+        //MockEntity entityA;
+        //MockEntity entityB;
+
+        // Set up colliders for testing
+        entityA.comp.collider = {0, 0, 10, 10};
+        entityB.comp.collider = {15, 15, 10, 10};
+
+        posModA = {0, 0};
+        posModB = {0, 0};
+    }
+};
+
+TEST_F(CollisionHandlerTest, NoIntersection) {
+    // Test when entities do not intersect
+    // Adjust collider positions so they do not intersect
+    entityB.getComponent<ColliderComponent>().collider.x = 20;
+    entityB.getComponent<ColliderComponent>().collider.y = 20;
+
+    auto intersections = collisionHandler.getIntersection(&entityA, &entityB, posModA, posModB);
+    ASSERT_EQ(intersections.none(), true);
+}
+
+TEST_F(CollisionHandlerTest, IntersectionInAllDirections) {
+    // Test when entities intersect in all directions
+    // Adjust collider positions so they intersect in all directions
+    entityB.getComponent<ColliderComponent>().collider.x = 5;
+    entityB.getComponent<ColliderComponent>().collider.y = 5;
+
+    auto intersections = collisionHandler.getIntersection(&entityA, &entityB, posModA, posModB);
+    ASSERT_EQ(intersections.all(), true);
+}
+
+TEST_F(CollisionHandlerTest, IntersectionInSomeDirections) {
+    // Test when entities intersect in some directions
+    // Adjust collider positions so they intersect in some directions
+    entityB.getComponent<ColliderComponent>().collider.x = 5;
+    entityB.getComponent<ColliderComponent>().collider.y = 15;
+
+    auto intersections = collisionHandler.getIntersection(&entityA, &entityB, posModA, posModB);
+    ASSERT_EQ(intersections.test(static_cast<size_t>(Direction::UP)), true);
+    ASSERT_EQ(intersections.test(static_cast<size_t>(Direction::DOWN)), false);
+}
\ No newline at end of file