re-organise test structure

test/src/test_main.c

@@ -0,0 +1,19 @@
+/*
+ * Copyright (c), Recep Aslantas.
+ * MIT License (MIT), http://opensource.org/licenses/MIT
+ */
+
+#include "test_common.h"
+#include "test_tests.h"
+
+int
+main(int argc, const char * argv[]) {
+  const struct CMUnitTest tests[] = {
+    /* mat4 */
+    cmocka_unit_test(test_mat4),
+  };
+
+  return cmocka_run_group_tests(tests,
+                                NULL,
+                                NULL);
+}