re-organise test structure

test/src/test_tests.h

@@ -0,0 +1,12 @@
+/*
+ * Copyright (c), Recep Aslantas.
+ * MIT License (MIT), http://opensource.org/licenses/MIT
+ */
+
+#ifndef test_tests_h
+#define test_tests_h
+
+/* mat4 */
+void test_mat4(void **state);
+
+#endif /* test_tests_h */