我在jest中有一些测试用例，它们依赖于Assert在setTimeout之后调用一个或多个回调来测试异步特性。示例

function publish(eventName, args) {
  const callbacks = getAllCallbacks(eventName);
  // Subscriptions being called asynchronously
  setTimeout(() => {
    callbacks.forEach(cb => {
      callback(...args);
    });
  }, 1000);
}

// Example 1
it('test 1 callback after executed twice', (done) => {
  const callback = jest.fn((arg) => {
    expect(arg).toBe('some value');
    done() // but done should be called after being called the second time
  })
  subscribe('eventName', callback);
  publish('eventName', args); // first publish
  publish('eventName', args); // second publish
  expect(callback).toHaveBeenCalledTimes(2); // but callback will be called after 5 seconds
});

// Example 2
it('test 1 callback after executed twice', (done) => {
  const callback1 = jest.fn((arg) => {
    expect(arg).toBe('some value');
    done() // but done should be called after all callbacks were executed
  })
  const callback2 = jest.fn((arg) => {
    expect(arg).toBe('some value');
    done() // but done should be called after all callbacks were executed
  })
  subscribe('eventName', callback);
  subscribe('eventName', callback2);
  publish('eventName', args);

  expect(callback1).toHaveBeenCalledTimes(1); // but callback will be called after 5 seconds
  expect(callback2).toHaveBeenCalledTimes(1); // but callback will be called after ~1 second
});

上述测试用例是不正确的，因为在执行“ALL”回调后未调用done，并且expect().toHaveBeenCalledTimes()也不会异步执行。