test.h

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#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__ */