Mocha与Chai HTTP异步测试？

Question

我正在使用Mocha和Chai HTTP测试Rest API。我一直在使用回调编写所有测试用例，现在我想使用async / await，因为它具有更多可读性的tan回调和Promise，因此我得到了以下代码：

let sport1, sport2;
let user1, user2;
let user1Token;
let event1, event2, event3, event4;

beforeEach(async function () {
  const preUser1 = test.createUser('user1@test.com');
  const preUser2 = test.createUser('user2@test.com')

  sport1 = await Sport.create(test.createSport('Tenis'));
  sport2 = await Sport.create(test.createSport('Baloncesto'));
  user1 = await User.create(preUser1);
  user2 = await User.create(preUser2);
  event1 = await Event.create(test.createEventDb(user1._id, sport1._id));
  event2 = await Event.create(test.createEventDb(user1._id, sport2._id));
  event3 = await Event.create(test.createEventDb(user2._id, sport1._id));
  event4 = await Event.create(test.createEventDb(user2._id, sport2._id));

  await chai.request(app)
    .post(`${apiPath}/sessions`)
    .set('content-type', 'application/json')
    .send({ email: preUser1.email, password: preUser1.password })
    .end(function (err, res) {
      console.log(res.body)
      user1Token = res.body.data.session.token;
    });
});

等待语句工作正常，但是问题出在柴。我收到此错误：

1) Events "before each" hook for "should return 200, id and event info":
 TypeError: First argument must be a string or Buffer
    at ClientRequest.end (_http_outgoing.js:605:11)
    at Test.Request.end (node_modules/superagent/lib/node/index.js:873:9)
    at node_modules/superagent/lib/request-base.js:72:12
    at Test.then (node_modules/superagent/lib/request-base.js:71:31)
    at process._tickCallback (internal/process/next_tick.js:109:7)

但是，如果没有async / await调用，则不会引发此错误。有什么想法吗？谢谢。

Answer 1

正如@Rhayene所述，要使用Chai并不能使用该.end()方法，这就是为什么我会收到该错误的原因。因此，您只需将响应存储在变量中，然后进行所需的声明即可。所以，我的重构代码是这样的：

let sport1, sport2;
let user1, user2;
let user1Token;
let event1, event2, event3, event4;

beforeEach(async function () {
  const preUser1 = test.createUser('user1@test.com');
  const preUser2 = test.createUser('user2@test.com')

  sport1 = await Sport.create(test.createSport('Tenis'));
  sport2 = await Sport.create(test.createSport('Baloncesto'));
  user1 = await User.create(preUser1);
  user2 = await User.create(preUser2);
  event1 = await Event.create(test.createEventDb(user1._id, sport1._id));
  event2 = await Event.create(test.createEventDb(user1._id, sport2._id));
  event3 = await Event.create(test.createEventDb(user2._id, sport1._id));
  event4 = await Event.create(test.createEventDb(user2._id, sport2._id));

  const res = await chai.request(app)
    .post(`${apiPath}/sessions`)
    .set('content-type', 'application/json')
    .send({ email: preUser1.email, password: preUser1.password })

  user1Token = res.body.data.session.token;
});