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       postMessage: stub().returns(),
  27       unref: stub().returns(),
  28       close: 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       status: false,
  50       error: new TypeError('name parameter is not a string')
  51     })
  52     expect(worker.removeTaskFunction('', fn1)).toStrictEqual({
  53       status: false,
  54       error: new TypeError('name parameter is an empty string')
  55     })
  56     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
  57     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
  58     expect(worker.taskFunctions.get('fn2')).toBeInstanceOf(Function)
  59     expect(worker.taskFunctions.size).toBe(3)
  60     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
  61       worker.taskFunctions.get('fn1')
  62     )
  63     expect(worker.removeTaskFunction(DEFAULT_TASK_NAME)).toStrictEqual({
  64       status: false,
  65       error: new Error(
  66         'Cannot remove the task function with the default reserved name'
  67       )
  68     })
  69     expect(worker.removeTaskFunction('fn1')).toStrictEqual({
  70       status: false,
  71       error: new Error(
  72         'Cannot remove the task function used as the default task function'
  73       )
  74     })
  75     worker.removeTaskFunction('fn2')
  76     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
  77     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
  78     expect(worker.taskFunctions.get('fn2')).toBeUndefined()
  79     expect(worker.taskFunctions.size).toBe(2)
  80     expect(worker.port.postMessage.calledOnce).toBe(true)
  81   })
  82
  83   it('Verify that handleError() method is working properly', () => {
  84     const error = new Error('Error as an error')
  85     const worker = new ThreadWorker(() => {})
  86     expect(worker.handleError(error)).toBeInstanceOf(Error)
  87     expect(worker.handleError(error)).toStrictEqual(error)
  88     const errorMessage = 'Error as a string'
  89     expect(worker.handleError(errorMessage)).toStrictEqual(errorMessage)
  90   })
  91
  92   it('Verify that sendToMainWorker() method invokes the port property postMessage() method', () => {
  93     const worker = new ThreadWorker(() => {})
  94     worker.port = { postMessage: stub().returns() }
  95     worker.sendToMainWorker({ ok: 1 })
  96     expect(worker.port.postMessage.calledOnce).toBe(true)
  97   })
  98 })