模拟默认导出失败,但未命名为导出

时间:2020-09-22 04:51:38

标签: javascript ecmascript-6 jestjs mocking

我可以说file.js具有类似这样的代码

const myFunc = () => {
    return {
        func1: () => {},
        func2: () => {}
    }
}

export const myObject = {
 key: ''
};

export default myFunc();

我试图在测试中使用玩笑来模拟此导出。可以说file.test.js是测试文件。

jest.mock('./path/file', () => {
    return {
         default: {
              func1: jest.fn(),
              func2: jest.fn()
         },
         myObject: {}
    };
});

但是,当我的测试正在运行时,会抛出错误_File.default.func1 is not a function

如何正确模拟同时具有默认出口和命名出口的js文件?

1 个答案:

答案 0 :(得分:0)

解决方案:

index.ts

const myFunc = () => {
  return {
    func1: () => {},
    func2: () => {},
  };
};

export const myObject = {
  key: '',
};

export default myFunc();

index.test.ts

import fns, { myObject } from './';

jest.mock('./', () => {
  return {
    myObject: { key: 'teresa teng' },
    func1: jest.fn(),
    func2: jest.fn(),
  };
});

describe('64003254', () => {
  it('should pass', () => {
    expect(jest.isMockFunction(fns.func1)).toBeTruthy();
    expect(jest.isMockFunction(fns.func2)).toBeTruthy();
    expect(myObject.key).toBe('teresa teng');
  });
});

单元测试结果:

 PASS  src/stackoverflow/64003254/index.test.ts (11.809s)
  64003254
    ✓ should pass (6ms)

Test Suites: 1 passed, 1 total
Tests:       1 passed, 1 total
Snapshots:   0 total
Time:        13.572s
相关问题