tests

1 files changed, 50 insertions, 0 deletions

diff --git a/src/test/loopManagerTest.cpp b/src/test/loopManagerTest.cpp
new file mode 100644
index 0000000..6e66ce7
--- /dev/null
+++ b/src/test/loopManagerTest.cpp
@@ -0,0 +1,50 @@
+#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 LoopTimerTest : public ::testing::Test {
+protected:
+    LoopManager loop_manager;
+
+    void SetUp() override {
+        // Setting up loop manager and start the loop
+        loop_manager.setup();
+        loop_manager.loop_timer->set_target_fps(60);
+    }
+};
+
+// Test to check if exactly 5 fixed updates are done every second (50Hz)
+TEST_F(LoopTimerTest, FixedUpdateCalledAt50Hz) {
+    // Set target fixed delta time to 20ms (50Hz fixed updates)
+    loop_manager.loop_timer->set_fixed_delta_time(milliseconds(20));
+
+    int fixed_update_count = 0;
+
+    // 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<seconds>(steady_clock::now() - start_time).count() < 1) {
+        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()) {
+            loop_manager.fixed_update();  // Process fixed update
+            fixed_update_count++;         // Count the number of fixed updates
+            loop_manager.loop_timer->advance_fixed_update();
+        }
+        
+        // We do not need to call render or update for this test
+        loop_manager.loop_timer->enforce_frame_rate();  // Enforce the frame rate (this would normally go to the display)
+    }
+
+    // We expect 5 fixed updates to occur in 1 second at 50Hz
+    ASSERT_EQ(fixed_update_count, 5);
+}