tests/worker/thread-worker.test.mjs

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