Nock 拦截请求但 returns 空对象

Question

我正在使用 mocha as the testing framework and I'm trying to mock up a DELETE request that uses fetch 来对抗 return HTTP 状态代码 204.

的端点

这里是测试代码：

it('should logout user', (done) => {
  nock(<domain>)
    .log(console.log)
    .delete(path)
    .reply(204, {
      status: 204,
      message: 'This is a mocked response',
    });

  api.logout(token)
    .then((response) => {
      console.log('IS DONE?--->', nock.isDone());
      console.log('RESPONSE--->', response);
      done();
    })
    .catch((error) => {
      console.log('ERROR--->', error);
    });
});

这 return 的输出如下：

matching <domain> to DELETE <domain>/<path>: true 
(the above line being generated by the .log method in nock)
IS DONE?---> true
RESPONSE---> {}

如您所见，请求已按 log() 和 isDone()nock 方法正确拦截，但是 response 对象 returned 是空的对象，因此无法断言 returned HTTP 状态代码（在本例中 204）

知道我在这里可能遗漏了什么吗？为什么 reply() 方法 return 是一个空对象？

更新

这是 logout 方法的代码，remove 方法是使用 DELETE HTTP 方法对 fetch 请求的包装器。

logout(token) {
  return remove(
    this.host,
    END_POINTS.DELETE_TOKEN,
    {
      pathParams: { token },
    },
    {
      Accept: 'application/json',
      'Content-Type': 'application/json',
      Authorization: `Bearer ${token}`,
    },
  );
}

Answer 1

我认为 204 不应该有响应 body, so you may need to change it to 200. The server of course could return the response, but I think the fetch will not handle it. Other package like request 将处理具有 204 状态的正文，但此请求包仅用于 server-side。

也不确定你的包装器做了什么，但我认为你需要使用 response.json() 承诺来获得响应。而且 mocha 还可以自动处理 promises，你可以 return 它们。请参阅下面的完整示例：

const nock = require('nock')
const fetch = require('isomorphic-fetch');
const request = require('request')

const domain = "http://domain.com";
const path = '/some-path';
const token = 'some-token';

const api = {
    logout: (token) => {
        return fetch(domain + path, {
            method: 'DELETE',
            headers: {
                'Content-Type': 'application/json'
            }
        });
    }
}

describe('something', () => {
    it('should logout user with 204 response using request package', (done) => {
        nock(domain)
            .log(console.log)
            .delete(path)
            .reply(204, {
                status: 204,
                message: 'This is a mocked response',
            });

        request.delete(domain + path, function(err, res) {
            console.log(res.body);
            done(err);
        })
    });

    it('should logout user', () => {
        nock(domain)
            .log(console.log)
            .delete(path)
            .reply(200, {
                status: 200,
                message: 'This is a mocked response',
            });

        return api.logout(token)
            .then((response) => {
                console.log('IS DONE?--->', nock.isDone());
                return response.json();
            })
            .then(function(body) {
                console.log('BODY', body);
            })
            .catch((error) => {
                console.log('ERROR--->', error);
            });
    });
});

这将输出：

  something
matching http://domain.com:80 to DELETE http://domain.com:80/some-path: true
{"status":204,"message":"This is a mocked response"}
    ✓ should logout user with 204 response
matching http://domain.com:80 to DELETE http://domain.com:80/some-path: true
IS DONE?---> true
BODY { status: 200, message: 'This is a mocked response' }
    ✓ should logout user

使用了以下部门：

  "dependencies": {
    "isomorphic-fetch": "^2.2.1",
    "mocha": "^3.2.0",
    "nock": "^9.0.6",
    "request": "^2.79.0"
  }

希望对您有所帮助。

Nock 拦截请求但 returns 空对象

Nock intercepts request but returns empty object

unit-testing

mocha.js

fetch

interceptor

nock