1 files changed, 44 insertions, 0 deletions
diff --git a/src/test/LoopManagerTest.cpp b/src/test/LoopManagerTest.cpp
new file mode 100644
index 0000000..af6cb1c
--- /dev/null
+++ b/src/test/LoopManagerTest.cpp
@@ -0,0 +1,44 @@
+#include <gtest/gtest.h>
+#include <chrono>
+#include <thread>
+#define private public
+#define protected public
+#include "api/LoopTimer.h"
+#include "api/LoopManager.h"
+
+using namespace std::chrono;
+using namespace crepe;
+
+class LoopManagerTest : public ::testing::Test {
+protected:
+    LoopManager loop_manager;
+
+    void SetUp() override {
+        // Setting up loop manager and start the loop
+        loop_manager.loop_timer->set_target_fps(60);
+    }
+};
+
+//Test to check if exactly 5 fixed updates are done every second (50Hz)
+TEST_F(LoopManagerTest, FixedUpdate) {
+	loop_manager.loop_timer->fixed_delta_time = std::chrono::milliseconds(20); 
+	loop_manager.loop_timer->set_target_fps(50);
+    int fixed_update_count = 0;
+	loop_manager.loop_timer->start();
+    // We want to simulate the game loop for about 1 second
+    auto start_time = steady_clock::now();
+
+    // Simulate the game loop for 1 second
+    while (duration_cast<milliseconds>(steady_clock::now() - start_time) < std::chrono::milliseconds(1000)) {
+		loop_manager.loop_timer->update();
+        // Simulate processing fixed updates while there's lag to advance
+        while (loop_manager.loop_timer->get_lag() >= loop_manager.loop_timer->get_fixed_delta_time()) {
+            fixed_update_count++;
+            loop_manager.loop_timer->advance_fixed_update();
+        }
+        
+        loop_manager.loop_timer->enforce_frame_rate();
+    }
+	// gameloop is 99 because it first takes 20 millisecond to build the lag to execute the fixed loop
+    ASSERT_EQ(fixed_update_count, 50);
+}