testy.h

#pragma once

#if defined(TESTY_UNIT_TEST)
#include <assert.h>
void testy_register(const char *name, void (*func)(void), const char *file,
                    int line);

//! Generate the test function body and the constructor that registers it with
//! the testy list of tests. Append a trailing '_' when defining the test
//! function name, to help avoid name conflicts with the source under test.
#define TEST(func_, contents_)                                          \
  static void func_##_(void) contents_                                  \
      __attribute__((constructor)) static void reg_test_##func_(void) { \
    testy_register(#func_, func_##_, __FILE__, __LINE__);               \
  }

//! Generate an exploding fake for linker misses
#define TESTY_EXPLODING_FAKE(name)        \
  __attribute__((weak)) void name(void) { \
    assert(0 && "exploding fake!");       \
  }

#else
#define TEST(func_, contents_)
#endif