尝试用笑话做一个简单的 Axios 模拟

San*_*ing 3 javascript node.js ecmascript-6 jestjs

我试图理解这个例子,所以我要做的第一件事就是删除他的axiosConfig.js,所以这个例子看起来更像我想解决的当前案例。但是我收到这个错误

- Expected
+ Received

  Object {
+   "baseURL": "https://jsonplaceholder.typicode.com/albums",
    "method": "get",
    "url": "/3/photos?_limit=3",
  },

Number of calls: 1

  39 |         const photos = await getPhotosByAlbumID(3);
  40 |         expect(axios.request).toHaveBeenCalled();
> 41 |         expect(axios.request).toHaveBeenCalledWith({ method: 'get', url: '/3/photos?_limit=3' })
     |                               ^
  42 |         expect(photos.length).toEqual(3);
  43 |         expect(photos[0].albumId).toEqual(3)
  44 |     });
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问题

谁能弄清楚如何修复失败的测试?

如果我baseURL: 'https://jsonplaceholder.typicode.com/albums'从 中删除,但没有 agetPhotosByAlbumId()则没有意义axios.request()baseURL.

我在网上有它https://repl.it/@SandraSchlichti/jest-playground#index.js

索引.js

const axios = require('axios');

const getPhotosByAlbumId = async (id) => {
    const result = await axios.request({
      baseURL: 'https://jsonplaceholder.typicode.com/albums',
      method: 'get',
      url: `/${id}/photos?_limit=3`
    });
    const { data } = result;
    return data;
};

module.exports = getPhotosByAlbumId;
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索引.spec.js

const axios = require('axios');
const getPhotosByAlbumID = require('./index');

jest.mock('axios', () => {
    return {
        baseURL: 'https://jsonplaceholder.typicode.com/albums',
        request: jest.fn().mockResolvedValue({
            data: [
                {
                    albumId: 3,
                    id: 101,
                    title: 'incidunt alias vel enim',
                    url: 'https://via.placeholder.com/600/e743b',
                    thumbnailUrl: 'https://via.placeholder.com/150/e743b'
                },
                {
                    albumId: 3,
                    id: 102,
                    title: 'eaque iste corporis tempora vero distinctio consequuntur nisi nesciunt',
                    url: 'https://via.placeholder.com/600/a393af',
                    thumbnailUrl: 'https://via.placeholder.com/150/a393af'
                },
                {
                    albumId: 3,
                    id: 103,
                    title: 'et eius nisi in ut reprehenderit labore eum',
                    url: 'https://via.placeholder.com/600/35cedf',
                    thumbnailUrl: 'https://via.placeholder.com/150/35cedf'
                }
            ]
        })
    }
})

describe('test getPhotosByAlbumID ', () => {
    afterEach(() => jest.resetAllMocks());

    it('fetches photos by album id', async () => {
        const photos = await getPhotosByAlbumID(3);
        expect(axios.request).toHaveBeenCalled();
        expect(axios.request).toHaveBeenCalledWith({ method: 'get', url: '/3/photos?_limit=3' })
        expect(photos.length).toEqual(3);
        expect(photos[0].albumId).toEqual(3)
    });
});
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Ten*_*eff 5

由于在您的实现中您正在axios.request使用具有 baseURL 的对象进行调用,因此它与您的断言不匹配。

因此,您可以断言必须使用具有 baseURL 的对象来调用它

expect(axios.request).toHaveBeenCalledWith({
    baseURL: "https://jsonplaceholder.typicode.com/albums",
    method: "get",
    url: "/3/photos?_limit=3",
});
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或者调用该方法的对象必须具有这两个属性:

expect(axios.request).toHaveBeenCalledWith(
    expect.objectContaining({ method: "get", url: "/3/photos?_limit=3" })
);
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工作示例