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 worker properties value after initialization', () => {
  13     const worker = new ClusterWorker(() => {})
  14     expect(worker.isMain).toBe(true)
  15     expect(worker.mainWorker).toBe(undefined)
  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 ClusterWorker(() => {}, {
  22       killHandler: stub().returns()
  23     })
  24     worker.isMain = false
  25     worker.getMainWorker = stub().returns({
  26       id: 1,
  27       send: stub().returns()
  28     })
  29     worker.handleKillMessage()
  30     expect(worker.getMainWorker.calledTwice).toBe(true)
  31     expect(worker.getMainWorker().send.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 ClusterWorker({ fn1, fn2 })
  43     worker.getMainWorker = stub().returns({
  44       id: 1,
  45       send: stub().returns()
  46     })
  47     expect(worker.removeTaskFunction(0, fn1)).toStrictEqual({
  48       status: false,
  49       error: new TypeError('name parameter is not a string')
  50     })
  51     expect(worker.removeTaskFunction('', fn1)).toStrictEqual({
  52       status: false,
  53       error: new TypeError('name parameter is an empty string')
  54     })
  55     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual({
  56       taskFunction: expect.any(Function)
  57     })
  58     expect(worker.taskFunctions.get('fn1')).toStrictEqual({
  59       taskFunction: expect.any(Function)
  60     })
  61     expect(worker.taskFunctions.get('fn2')).toStrictEqual({
  62       taskFunction: expect.any(Function)
  63     })
  64     expect(worker.taskFunctions.size).toBe(3)
  65     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
  66       worker.taskFunctions.get('fn1')
  67     )
  68     expect(worker.removeTaskFunction(DEFAULT_TASK_NAME)).toStrictEqual({
  69       status: false,
  70       error: new Error(
  71         'Cannot remove the task function with the default reserved name'
  72       )
  73     })
  74     expect(worker.removeTaskFunction('fn1')).toStrictEqual({
  75       status: false,
  76       error: new Error(
  77         'Cannot remove the task function used as the default task function'
  78       )
  79     })
  80     worker.removeTaskFunction('fn2')
  81     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual({
  82       taskFunction: expect.any(Function)
  83     })
  84     expect(worker.taskFunctions.get('fn1')).toStrictEqual({
  85       taskFunction: expect.any(Function)
  86     })
  87     expect(worker.taskFunctions.get('fn2')).toBeUndefined()
  88     expect(worker.taskFunctions.size).toBe(2)
  89     expect(worker.getMainWorker.calledTwice).toBe(true)
  90     expect(worker.getMainWorker().send.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 ClusterWorker(() => {})
  96     expect(worker.handleError(error)).not.toBeInstanceOf(Error)
  97     expect(worker.handleError(error)).toStrictEqual(error.message)
  98     const errorMessage = 'Error as a string'
  99     expect(worker.handleError(errorMessage)).toStrictEqual(errorMessage)
 100   })
 101
 102   it('Verify that sendToMainWorker() method invokes the getMainWorker() and send() methods', () => {
 103     const worker = new ClusterWorker(() => {})
 104     worker.getMainWorker = stub().returns({
 105       send: stub().returns()
 106     })
 107     worker.sendToMainWorker({ ok: 1 })
 108     expect(worker.getMainWorker.calledTwice).toBe(true)
 109     expect(worker.getMainWorker().send.calledOnce).toBe(true)
 110   })
 111 })