tests/worker/cluster-worker.test.mjs

   1 import { expect } from 'expect'
   2 import { restore, stub } from 'sinon'
   3
   4 import { ClusterWorker } from '../../lib/index.cjs'
   5 import { DEFAULT_TASK_NAME } from '../../lib/utils.cjs'
   6
   7 describe('Cluster 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 ClusterWorker(() => {}, {
  14       killHandler: stub().returns()
  15     })
  16     worker.isMain = false
  17     worker.getMainWorker = stub().returns({
  18       id: 1,
  19       send: stub().returns()
  20     })
  21     worker.handleKillMessage()
  22     expect(worker.getMainWorker.calledTwice).toBe(true)
  23     expect(worker.getMainWorker().send.calledOnce).toBe(true)
  24     expect(worker.opts.killHandler.calledOnce).toBe(true)
  25   })
  26
  27   it('Verify that removeTaskFunction() is working', () => {
  28     const fn1 = () => {
  29       return 1
  30     }
  31     const fn2 = () => {
  32       return 2
  33     }
  34     const worker = new ClusterWorker({ fn1, fn2 })
  35     worker.getMainWorker = stub().returns({
  36       id: 1,
  37       send: 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.getMainWorker.calledTwice).toBe(true)
  72     expect(worker.getMainWorker().send.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 ClusterWorker(() => {})
  78     expect(worker.handleError(error)).not.toBeInstanceOf(Error)
  79     expect(worker.handleError(error)).toStrictEqual(error.message)
  80     const errorMessage = 'Error as a string'
  81     expect(worker.handleError(errorMessage)).toStrictEqual(errorMessage)
  82   })
  83
  84   it('Verify that sendToMainWorker() method invokes the getMainWorker() and send() methods', () => {
  85     const worker = new ClusterWorker(() => {})
  86     worker.getMainWorker = stub().returns({
  87       send: stub().returns()
  88     })
  89     worker.sendToMainWorker({ ok: 1 })
  90     expect(worker.getMainWorker.calledTwice).toBe(true)
  91     expect(worker.getMainWorker().send.calledOnce).toBe(true)
  92   })
  93 })