node-uci/src/Engine/__test__/quit.test.js

Universal Chess Interface protocol implementation for node.js

import { EOL } from 'os'

import Engine from '../'
import { syncify, engineInit } from '../../__test__/util'

jest.mock('child_process')
import { cpMock } from 'child_process'

describe('quit', () => {
  it('should reject if process not running', async () => {
    const fn = await syncify(async () => {
      const p = new Engine('').quit()
      await p
    })

    expect(fn).toThrow()
  })

  it('should send "quit" command to proc stdout', async () => {
    const p = await engineInit(cpMock)
    p.quit()

    expect(cpMock.stdin.write).toHaveBeenCalledWith(`quit${EOL}`)
  })

  it('should clean up after process exits', async () => {
    let p = await engineInit(cpMock)
    p = p.quit()
    cpMock.emit('close')
    await p

    expect(p.proc).toBeUndefined()
    expect(cpMock.stdout.listenerCount('data')).toBe(0)
  })
})