tests/worker/cluster-worker.test.mjs

   1 import { expect } from 'expect'
   2 import { restore, stub } from 'sinon'
   3 import { ClusterWorker } from '../../lib/index.cjs'
   4 import { DEFAULT_TASK_NAME } from '../../lib/utils.cjs'
   5
   6 describe('Cluster 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 ClusterWorker(() => {}, {
  13       killHandler: stub().returns()
  14     })
  15     worker.isMain = false
  16     worker.getMainWorker = stub().returns({
  17       id: 1,
  18       send: stub().returns()
  19     })
  20     worker.handleKillMessage()
  21     expect(worker.getMainWorker.calledTwice).toBe(true)
  22     expect(worker.getMainWorker().send.calledOnce).toBe(true)
  23     expect(worker.opts.killHandler.calledOnce).toBe(true)
  24   })
  25
  26   it('Verify that removeTaskFunction() is working', () => {
  27     const fn1 = () => {
  28       return 1
  29     }
  30     const fn2 = () => {
  31       return 2
  32     }
  33     const worker = new ClusterWorker({ fn1, fn2 })
  34     worker.getMainWorker = stub().returns({
  35       id: 1,
  36       send: stub().returns()
  37     })
  38     expect(worker.removeTaskFunction(0, fn1)).toStrictEqual({
  39       status: false,
  40       error: new TypeError('name parameter is not a string')
  41     })
  42     expect(worker.removeTaskFunction('', fn1)).toStrictEqual({
  43       status: false,
  44       error: new TypeError('name parameter is an empty string')
  45     })
  46     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
  47     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
  48     expect(worker.taskFunctions.get('fn2')).toBeInstanceOf(Function)
  49     expect(worker.taskFunctions.size).toBe(3)
  50     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
  51       worker.taskFunctions.get('fn1')
  52     )
  53     expect(worker.removeTaskFunction(DEFAULT_TASK_NAME)).toStrictEqual({
  54       status: false,
  55       error: new Error(
  56         'Cannot remove the task function with the default reserved name'
  57       )
  58     })
  59     expect(worker.removeTaskFunction('fn1')).toStrictEqual({
  60       status: false,
  61       error: new Error(
  62         'Cannot remove the task function used as the default task function'
  63       )
  64     })
  65     worker.removeTaskFunction('fn2')
  66     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
  67     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
  68     expect(worker.taskFunctions.get('fn2')).toBeUndefined()
  69     expect(worker.taskFunctions.size).toBe(2)
  70     expect(worker.getMainWorker.calledTwice).toBe(true)
  71     expect(worker.getMainWorker().send.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 ClusterWorker(() => {})
  77     expect(worker.handleError(error)).not.toBeInstanceOf(Error)
  78     expect(worker.handleError(error)).toStrictEqual(error.message)
  79     const errorMessage = 'Error as a string'
  80     expect(worker.handleError(errorMessage)).toStrictEqual(errorMessage)
  81   })
  82
  83   it('Verify that sendToMainWorker() method invokes the getMainWorker() and send() methods', () => {
  84     const worker = new ClusterWorker(() => {})
  85     worker.getMainWorker = stub().returns({
  86       send: stub().returns()
  87     })
  88     worker.sendToMainWorker({ ok: 1 })
  89     expect(worker.getMainWorker.calledTwice).toBe(true)
  90     expect(worker.getMainWorker().send.calledOnce).toBe(true)
  91   })
  92 })