mfbt/tests/TestScopeExit.cpp


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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "mozilla/Assertions.h"
#include "mozilla/ScopeExit.h"

using mozilla::MakeScopeExit;

#define CHECK(c) \
  do { \
    bool cond = !!(c); \
    MOZ_RELEASE_ASSERT(cond, "Failed assertion: " #c); \
    if (!cond) { \
      return false; \
    } \
  } while (false)

static bool
Test()
{
  int a = 1;
  int b = 1;

  {
    a++;
    auto guardA = MakeScopeExit([&] {
      a--;
    });

    b++;
    auto guardB = MakeScopeExit([&] {
      b--;
    });

    guardB.release();
  }

  CHECK(a == 1);
  CHECK(b == 2);

  return true;
}

int
main()
{
  if (!Test()) {
    return 1;
  }
  return 0;
}