fix engine variant added tests

tests/CMakeLists.txt

@@ -0,0 +1,14 @@
+file(GLOB TEST_SOURCES "*.cpp")
+
+# Loop through each .cpp file and build a separate executable for it!
+foreach(TEST_FILE ${TEST_SOURCES})
+    # Extract filename without path/extension (e.g., "test_property_reflection")
+    get_filename_component(TEST_NAME ${TEST_FILE} NAME_WE)
+
+    # Create individual target for this specific test
+    add_executable(${TEST_NAME} ${TEST_FILE})
+    target_link_libraries(${TEST_NAME} PRIVATE my_app_lib)
+
+    # Register each as an individual test with CTest
+    add_test(NAME ${TEST_NAME} COMMAND ${TEST_NAME})
+endforeach()