tests/worker/thread-worker.test.mjs

   1 import { expect } from 'expect'
   2 import { restore, stub } from 'sinon'
   3 import { ThreadWorker } from '../../lib/index.js'
   4 import { DEFAULT_TASK_NAME } from '../../lib/utils.js'
   5
   6 describe('Thread worker test suite', () => {
   7   class SpyWorker extends ThreadWorker {
   8     constructor (fn) {
   9       super(fn)
  10       this.port = { postMessage: stub().returns() }
  11     }
  12   }
  13
  14   afterEach(() => {
  15     restore()
  16   })
  17
  18   it('Verify that sync kill handler is called when worker is killed', () => {
  19     const worker = new ThreadWorker(() => {}, {
  20       killHandler: stub().returns()
  21     })
  22     worker.isMain = false
  23     worker.port = {
  24       postMessage: stub().returns(),
  25       unref: stub().returns(),
  26       close: stub().returns()
  27     }
  28     worker.handleKillMessage()
  29     expect(worker.port.postMessage.calledOnce).toBe(true)
  30     expect(worker.port.unref.calledOnce).toBe(true)
  31     expect(worker.port.close.calledOnce).toBe(true)
  32     expect(worker.opts.killHandler.calledOnce).toBe(true)
  33   })
  34
  35   it('Verify that removeTaskFunction() is working', () => {
  36     const fn1 = () => {
  37       return 1
  38     }
  39     const fn2 = () => {
  40       return 2
  41     }
  42     const worker = new ThreadWorker({ fn1, fn2 })
  43     expect(worker.removeTaskFunction(0, fn1)).toStrictEqual({
  44       status: false,
  45       error: new TypeError('name parameter is not a string')
  46     })
  47     expect(worker.removeTaskFunction('', fn1)).toStrictEqual({
  48       status: false,
  49       error: new TypeError('name parameter is an empty string')
  50     })
  51     worker.port = {
  52       postMessage: stub().returns()
  53     }
  54     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
  55     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
  56     expect(worker.taskFunctions.get('fn2')).toBeInstanceOf(Function)
  57     expect(worker.taskFunctions.size).toBe(3)
  58     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
  59       worker.taskFunctions.get('fn1')
  60     )
  61     expect(worker.removeTaskFunction(DEFAULT_TASK_NAME)).toStrictEqual({
  62       status: false,
  63       error: new Error(
  64         'Cannot remove the task function with the default reserved name'
  65       )
  66     })
  67     expect(worker.removeTaskFunction('fn1')).toStrictEqual({
  68       status: false,
  69       error: new Error(
  70         'Cannot remove the task function used as the default task function'
  71       )
  72     })
  73     worker.removeTaskFunction('fn2')
  74     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
  75     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
  76     expect(worker.taskFunctions.get('fn2')).toBeUndefined()
  77     expect(worker.taskFunctions.size).toBe(2)
  78     expect(worker.port.postMessage.calledOnce).toBe(true)
  79   })
  80
  81   it('Verify that handleError() method is working properly', () => {
  82     const error = new Error('Error as an error')
  83     const worker = new ThreadWorker(() => {})
  84     expect(worker.handleError(error)).toBeInstanceOf(Error)
  85     expect(worker.handleError(error)).toStrictEqual(error)
  86     const errorMessage = 'Error as a string'
  87     expect(worker.handleError(errorMessage)).toStrictEqual(errorMessage)
  88   })
  89
  90   it('Verify worker invokes the postMessage() method on port property', () => {
  91     const worker = new SpyWorker(() => {})
  92     worker.sendToMainWorker({ ok: 1 })
  93     expect(worker.port.postMessage.calledOnce).toBe(true)
  94   })
  95 })