小编Hug*_*ães的帖子

我有一个类似于下面显示的测试.基本上我想测试特定方法是否会延迟.

以下示例按预期工作,即调用resolve方法并且测试通过:

it(`should delay execution by 1 second`, function () {
  const clock = sandbox.useFakeTimers();

  const p = new Promise(function (resolve) {
    setTimeout(resolve, 1000);
  });

  clock.tick(1000);

  return p;
});

但是,如果我将setTimeout包装在另一个Promise中,则决不会调用该解析:

it(`should delay execution by 1 second`, function () {
  const clock = sandbox.useFakeTimers();

  const p = Promise.resolve()
    .then(() => {
      return new Promise(function (resolve) {
        setTimeout(resolve, 1000); // resolve never gets called
      });
    });

    clock.tick(1000);

    return p;
  });

这有什么问题？

我正在使用Sinon 2.1.0和本地的承诺Node 6.9.5.