如何测试超级代理承诺

Question

我有一个用于 HTTP 请求的函数：

export default {
  getRequest: (url, params) => {
    return new Promise((resolve, reject) => {
      superagent.get(url)
        .query(params)
        .set('Accept', 'application/json')
        .end((err, response) => {
          if (!response) {
            reject(new Error('Something went wrong...'));
            return;
          }
          const payload = response.body || response.text;
          if (err) {
            reject(payload || err);
            return;
          }
          resolve(payload);
        });
    });
  }
};

我想在 Promise resolve 或 rejects 时测试这个函数。

我的测试是这样的：

import superagent from 'superagent';
import HTTPAsync from '../HTTPAsync';

describe('HTTPAsync. test', () => {
  describe('getRequest test', () => {
    const url = '/url';
    const params = { param: 'value' };
    const result = HTTPAsync.getRequest(url, params);
    it('Should be promise', () => {
      expect(result).toBeInstanceOf(Promise);
    });
    it('Should be pfromise', () => {
      expect(result.resolve()).toBe('');
    });
  });
});

但我不知道如何在快乐的场景或错误中解决返回的承诺并检查函数的结果

Answer 1

你可以做的是在成功或错误时捕获你的请求，使用像这样的超级代理：

const request = require('superagent');

describe('HTTPAsync. test', () => {
  it('Should be pfromise', done => {
    request
      .get('/your_url')
      .then(res => {
        // res.body, res.headers, res.status
        //your own logic
        done();
      })
      .catch(err => {
        // err.message, err.response
        //your own logic
        done();
      });
  });
});

Answer 2

我做了另一种类型的测试，这对我有帮助：

import superagent from 'superagent';
import HTTPAsync from '../HTTPAsync';

describe('HTTPAsync. test', () => {

  describe('getRequest test', () => {
    superagent.get = jest.fn(url => {
      return superagent;
    });
    superagent.query = jest.fn(query => {
      return superagent;
    });
    superagent.set = jest.fn(args => {
      return superagent;
    });
    superagent.end = jest.fn(cb => cb(null, { text: 'zaebis voda' }));

    const url = 'localhost:5000/url';
    const params = { param: 'value' };
    const result = HTTPAsync.getRequest(url, params);
    it('Should be promise', () => {
      expect(result).toBeInstanceOf(Promise);
      // HERE I WILL CHECK EXPECTED VALUES     
      return result.then(data => console.log(data));
    });
  });
});

如何测试超级代理承诺

How to test superagent promise

javascript

superagent

jestjs

enzyme