mock-internals.test.ts

import childProcess, { exec } from 'child_process'
import timers from 'timers'
import { expect, test, vi } from 'vitest'
import { execDefault, execHelloWorld, execImportAll } from '../src/exec'
import { dynamicImport } from '../src/dynamic-import'

vi.mock('child_process')
vi.mock('timers') // node built in inside __mocks__

test('node internal is mocked', () => {
  execHelloWorld()
  expect(exec).toHaveBeenCalledWith('hello world')

  execImportAll()
  expect(exec).toHaveBeenCalledWith('import all')

  execDefault()
  expect(childProcess.exec).toHaveBeenCalledWith('default')
})

test('builtin is mocked with __mocks__ folder', () => {
  expect(timers.clearInterval()).toBe('foo')
})

test('mocked dynamically imported packages', async () => {
  const mod = await dynamicImport('timers')
  expect(mod).toHaveProperty('default')
  expect(mod.default).toHaveProperty('clearInterval')
  expect(mod.default.clearInterval()).toBe('foo')
})