Typescript Jest模拟es6命名的导入对象

我想知道如何模拟一个导入的对象，用Jest返回一个假值

在这种情况下，我想将默认超时值（

5000

）改写为

1000

，以使函数崩溃

// config.ts
export const config = {
  request: {
    timeout: 5000,
  },
};

谢谢大家!

最新答案 在这种情况下，您必须使用

Require

而不是import（ESM）

测试文件如下所示：

// Test file

describe('greetings', () => {
  beforeEach(() => jest.resetModules())

  describe('hello', () => {
    describe('when the language is set to galician', () => {
      it('returns galician for hi', () => {
        jest.mock('./config', () => ({ request: { timeout: 1000 } }))
        const { request } = require('./config')
        expect(request.timeout).toEqual(1000)
      })
    })

    describe('when the language is not set to galician', () => {
      it('returns hi', () => {
        jest.mock('./config', () => ({ request: { timeout: 2000 } }))
        const { request } = require('./config')
        expect(request.timeout).toEqual(2000)
      })
    })
  })
})

参考-

// config.ts
export const config = {
  request: {
    timeout: 5000
  }
}

// Test file

describe('greetings', () => {
  beforeEach(() => jest.resetModules())

  describe('hello', () => {
    describe('when the language is set to galician', () => {
      it('returns galician for hi', () => {
        jest.mock('./config', () => ({ request: { timeout: 1000 } }))
        const { request } = require('./config')
        expect(request.timeout).toEqual(1000)
      })
    })

    describe('when the language is not set to galician', () => {
      it('returns hi', () => {
        jest.mock('./config', () => ({ request: { timeout: 2000 } }))
        const { request } = require('./config')
        expect(request.timeout).toEqual(2000)
      })
    })
  })
})