test/test.h

#ifndef __TEST_H__
#define __TEST_H__

static int test_passed = 0;
static int test_failed = 0;

/* Terminate current test with error */
#define fail()	return __LINE__

/* Successful end of the test case */
#define done() return 0

/* Check single condition */
#define check(cond) do { if (!(cond)) fail(); } while (0)

/* Test runner */
static void test(int (*func)(void), const char *name) {
	int r = func();
	if (r == 0) {
		test_passed++;
	} else {
		test_failed++;
		printf("FAILED: %s (at line %d)\n", name, r);
	}
}

#endif /* __TEST_H__ */