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 worker properties value after initialization', () => {
  13     const worker = new ThreadWorker(() => {})
  14     expect(worker.isMain).toBe(true)
  15     expect(worker.mainWorker).toBe(null)
  16     expect(worker.taskFunctions).toBeInstanceOf(Map)
  17     expect(worker.taskFunctions.size).toBe(2)
  18   })
  19
  20   it('Verify that sync kill handler is called when worker is killed', () => {
  21     const worker = new ThreadWorker(() => {}, {
  22       killHandler: stub().returns(),
  23     })
  24     worker.isMain = false
  25     worker.port = {
  26       close: stub().returns(),
  27       postMessage: stub().returns(),
  28       unref: stub().returns(),
  29     }
  30     worker.handleKillMessage()
  31     expect(worker.port.postMessage.calledOnce).toBe(true)
  32     expect(worker.port.unref.calledOnce).toBe(true)
  33     expect(worker.port.close.calledOnce).toBe(true)
  34     expect(worker.opts.killHandler.calledOnce).toBe(true)
  35   })
  36
  37   it('Verify that removeTaskFunction() is working', () => {
  38     const fn1 = () => {
  39       return 1
  40     }
  41     const fn2 = () => {
  42       return 2
  43     }
  44     const worker = new ThreadWorker({ fn1, fn2 })
  45     worker.port = {
  46       postMessage: stub().returns(),
  47     }
  48     expect(worker.removeTaskFunction(0, fn1)).toStrictEqual({
  49       error: new TypeError('name parameter is not a string'),
  50       status: false,
  51     })
  52     expect(worker.removeTaskFunction('', fn1)).toStrictEqual({
  53       error: new TypeError('name parameter is an empty string'),
  54       status: false,
  55     })
  56     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual({
  57       taskFunction: expect.any(Function),
  58     })
  59     expect(worker.taskFunctions.get('fn1')).toStrictEqual({
  60       taskFunction: expect.any(Function),
  61     })
  62     expect(worker.taskFunctions.get('fn2')).toStrictEqual({
  63       taskFunction: expect.any(Function),
  64     })
  65     expect(worker.taskFunctions.size).toBe(3)
  66     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
  67       worker.taskFunctions.get('fn1')
  68     )
  69     expect(worker.removeTaskFunction(DEFAULT_TASK_NAME)).toStrictEqual({
  70       error: new Error(
  71         'Cannot remove the task function with the default reserved name'
  72       ),
  73       status: false,
  74     })
  75     expect(worker.removeTaskFunction('fn1')).toStrictEqual({
  76       error: new Error(
  77         'Cannot remove the task function used as the default task function'
  78       ),
  79       status: false,
  80     })
  81     worker.removeTaskFunction('fn2')
  82     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual({
  83       taskFunction: expect.any(Function),
  84     })
  85     expect(worker.taskFunctions.get('fn1')).toStrictEqual({
  86       taskFunction: expect.any(Function),
  87     })
  88     expect(worker.taskFunctions.get('fn2')).toBeUndefined()
  89     expect(worker.taskFunctions.size).toBe(2)
  90     expect(worker.port.postMessage.calledOnce).toBe(true)
  91   })
  92
  93   it('Verify that handleError() method is working properly', () => {
  94     const error = new Error('Error as an error')
  95     const worker = new ThreadWorker(() => {})
  96     expect(worker.handleError(error)).toStrictEqual(error)
  97     const errorMessage = 'Error as a string'
  98     expect(worker.handleError(errorMessage)).toStrictEqual(errorMessage)
  99   })
 100
 101   it('Verify that sendToMainWorker() method invokes the port property postMessage() method', () => {
 102     const worker = new ThreadWorker(() => {})
 103     worker.port = { postMessage: stub().returns() }
 104     worker.sendToMainWorker({ ok: 1 })
 105     expect(worker.port.postMessage.calledOnce).toBe(true)
 106   })
 107 })