[英]JEST Mocking from node modules
我已經嘗試了一段時間,但找不到解決方案。
我嘗試了很多解決方案(__ mock __ 文件夾、mockimplementation、mock 等等)但我總是遇到相同的錯誤client.mockImplementation is not a function
//restclient.js
module.exports = (cfg) => new Client(config);
// api.js
const client = require('restclient');
module.exports.doRequest = () => {
const request = client();
const config = {};
request.get('/path/to/request', config)
.then(result => console.log(result))
}
//api.tests.js
const client = require('restclient');
const api = require('./api');
jest.mock('restclient', () => () => ({
get: jest.fn(),
}));
describe('testing API', () => {
test('test then', async () => {
try {
restclient.mockImplementation(() => () => ({
get: (url, config) => 'Hi! I\'m mocked',
}));
const result = await api.doRequest();
console.log('result', result);
} catch (e) {
console.log('eee', e);
}
});
});
我找不到解決方案,我想我不能模擬const request = restclient()
部分,但我不知道為什么!!
你錯過了模擬構造函數。
這模擬了restclient
的構造函數
jest.mock('restclient', ()=> jest.fn().mockImplementation(() => {
/** here you can create and return a mock of request **/
}));
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