Tweaks for native engine tests

#601

Source/Engine/Tests/TestMain.cpp

@@ -0,0 +1,14 @@
+// Copyright (c) 2012-2021 Wojciech Figat. All rights reserved.
+
+#if PLATFORM_WINDOWS || PLATFORM_LINUX
+
+#define CATCH_CONFIG_RUNNER
+#include <ThirdParty/catch2/catch.hpp>
+
+int main(int argc, char* argv[])
+{
+    int result = Catch::Session().run(argc, argv);
+    return result;
+}
+
+#endif