valeri/test/test.hpp

#pragma once

#include <cstdint>

const uint64_t MAX_TESTS = 1024 * 1024;
static void (*tests[MAX_TESTS])() = {0};

const char* add_test(void (*fun)(void)) {
  for (uint64_t i = 0; i < MAX_TESTS; ++i) {
    if (tests[i] == 0) {
      tests[i] = fun;
      break;
    }
  }

  return 0;
}

bool run_tests() {
  for (uint64_t i = 0; i < MAX_TESTS; ++i) {
    if (tests[i] == 0) break;

    tests[i]();
  }

  return true;
}

#define CONCAT_IMPL(x, y) x##y
#define MACRO_CONCAT(x, y) CONCAT_IMPL(x, y)

#define TEST_CASE_IMPL(ID, ...)                                             \
  static void ID();                                                         \
  static const char* MACRO_CONCAT(test_id_, __COUNTER__) [[maybe_unused]] = \
      add_test(&ID);                                                        \
  void ID()

#define TEST_CASE(fun_) TEST_CASE_IMPL(MACRO_CONCAT(fun_, _COUNTER_))

int main() { return run_tests() ? 0 : 1; }