mock reset

[wChenonly]

import { beforeEach, expect, it, vi } from 'vitest'
import { initReady } from './initUp'


// The initReady function in initUp.ts
export async function initReady() {
 const v = await initDeviceReady()
  return v
}


// test
beforeEach(() => {
  vi.resetAllMocks()
})

it('should return true when initialized successfully', async () => {
  vi.mock('@xxx/api', () => ({
    initDeviceReady: vi.fn().mockResolvedValue({
      retCode: '000000',
      retData: null,
      retInfo: 'success'
    })
  }))
  expect(await initReady()).toBe(true)
})

it('err', async () => {
  vi.mock('@xxx/api', () => ({
    initDeviceReady: vi.fn().mockResolvedValue({
      retCode: '222',
      retData: null,
      retInfo: 'error'
    })
  }))
  expect(await initReady()).toBe(false)
})

use beforeEach resetAllMocks ，Why would the second mock still overwrite the first, causing the first test to be wrong?

[sheremet-va]

vi.mock is hoisted: https://vitest.dev/api/vi.html#vi-mock

vi.mock is hoisted (in other words, moved) to top of the file. It means that whenever you write it (be it inside beforeEach or test), it will actually be called before that.

[wChenonly]

I've seen this before in the docs and didn't really understand it, then I studied a lot of issues and discussions and I got it.