tests/worker/thread-worker.test.mjs

   1 import { expect } from 'expect'
   2 import { restore, stub } from 'sinon'
   3
   4 import { ThreadWorker } from '../../lib/index.cjs'
   5 import { DEFAULT_TASK_NAME } from '../../lib/utils.cjs'
   6
   7 describe('Thread worker test suite', () => {
   8   afterEach(() => {
   9     restore()
  10   })
  11
  12   it('Verify that sync kill handler is called when worker is killed', () => {
  13     const worker = new ThreadWorker(() => {}, {
  14       killHandler: stub().returns()
  15     })
  16     worker.isMain = false
  17     worker.port = {
  18       postMessage: stub().returns(),
  19       unref: stub().returns(),
  20       close: stub().returns()
  21     }
  22     worker.handleKillMessage()
  23     expect(worker.port.postMessage.calledOnce).toBe(true)
  24     expect(worker.port.unref.calledOnce).toBe(true)
  25     expect(worker.port.close.calledOnce).toBe(true)
  26     expect(worker.opts.killHandler.calledOnce).toBe(true)
  27   })
  28
  29   it('Verify that removeTaskFunction() is working', () => {
  30     const fn1 = () => {
  31       return 1
  32     }
  33     const fn2 = () => {
  34       return 2
  35     }
  36     const worker = new ThreadWorker({ fn1, fn2 })
  37     worker.port = {
  38       postMessage: stub().returns()
  39     }
  40     expect(worker.removeTaskFunction(0, fn1)).toStrictEqual({
  41       status: false,
  42       error: new TypeError('name parameter is not a string')
  43     })
  44     expect(worker.removeTaskFunction('', fn1)).toStrictEqual({
  45       status: false,
  46       error: new TypeError('name parameter is an empty string')
  47     })
  48     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
  49     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
  50     expect(worker.taskFunctions.get('fn2')).toBeInstanceOf(Function)
  51     expect(worker.taskFunctions.size).toBe(3)
  52     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
  53       worker.taskFunctions.get('fn1')
  54     )
  55     expect(worker.removeTaskFunction(DEFAULT_TASK_NAME)).toStrictEqual({
  56       status: false,
  57       error: new Error(
  58         'Cannot remove the task function with the default reserved name'
  59       )
  60     })
  61     expect(worker.removeTaskFunction('fn1')).toStrictEqual({
  62       status: false,
  63       error: new Error(
  64         'Cannot remove the task function used as the default task function'
  65       )
  66     })
  67     worker.removeTaskFunction('fn2')
  68     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
  69     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
  70     expect(worker.taskFunctions.get('fn2')).toBeUndefined()
  71     expect(worker.taskFunctions.size).toBe(2)
  72     expect(worker.port.postMessage.calledOnce).toBe(true)
  73   })
  74
  75   it('Verify that handleError() method is working properly', () => {
  76     const error = new Error('Error as an error')
  77     const worker = new ThreadWorker(() => {})
  78     expect(worker.handleError(error)).toBeInstanceOf(Error)
  79     expect(worker.handleError(error)).toStrictEqual(error)
  80     const errorMessage = 'Error as a string'
  81     expect(worker.handleError(errorMessage)).toStrictEqual(errorMessage)
  82   })
  83
  84   it('Verify that sendToMainWorker() method invokes the port property postMessage() method', () => {
  85     const worker = new ThreadWorker(() => {})
  86     worker.port = { postMessage: stub().returns() }
  87     worker.sendToMainWorker({ ok: 1 })
  88     expect(worker.port.postMessage.calledOnce).toBe(true)
  89   })
  90 })