diff --git a/test/test-funcs.h b/test/test-funcs.h
new file mode 100644
index 0000000..dfee658
--- /dev/null
+++ b/test/test-funcs.h
@@ -0,0 +1,4 @@
+#pragma once
+
+#define STR(x) #x                       
+#define TEST(x) if(!(x)){ printf("test failed at %d, %s: %s\n", __LINE__, __FILE__, STR(x)); exit(-1); } else { printf("[OK] %s\n", STR(x)); }