tests/worker/cluster-worker.test.mjs

   1 import { expect } from 'expect'
   2 import { restore, stub } from 'sinon'
   3 import { ClusterWorker } from '../../lib/index.js'
   4 import { DEFAULT_TASK_NAME } from '../../lib/utils.js'
   5
   6 describe('Cluster worker test suite', () => {
   7   const sendStub = stub().returns()
   8   class SpyWorker extends ClusterWorker {
   9     getMainWorker () {
  10       return { send: sendStub }
  11     }
  12   }
  13
  14   afterEach(() => {
  15     restore()
  16   })
  17
  18   it('Verify that sync kill handler is called when worker is killed', () => {
  19     const worker = new ClusterWorker(() => {}, {
  20       killHandler: stub().returns()
  21     })
  22     worker.isMain = false
  23     worker.getMainWorker = stub().returns({
  24       id: 1,
  25       send: stub().returns()
  26     })
  27     worker.handleKillMessage()
  28     expect(worker.getMainWorker().send.calledOnce).toBe(true)
  29     expect(worker.opts.killHandler.calledOnce).toBe(true)
  30   })
  31
  32   it('Verify that removeTaskFunction() is working', () => {
  33     const fn1 = () => {
  34       return 1
  35     }
  36     const fn2 = () => {
  37       return 2
  38     }
  39     const worker = new ClusterWorker({ fn1, fn2 })
  40     expect(worker.removeTaskFunction(0, fn1)).toStrictEqual({
  41       status: false,
  42       error: new TypeError('name parameter is not a string')
  43     })
  44     expect(worker.removeTaskFunction('', fn1)).toStrictEqual({
  45       status: false,
  46       error: new TypeError('name parameter is an empty string')
  47     })
  48     worker.getMainWorker = stub().returns({
  49       id: 1,
  50       send: stub().returns()
  51     })
  52     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
  53     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
  54     expect(worker.taskFunctions.get('fn2')).toBeInstanceOf(Function)
  55     expect(worker.taskFunctions.size).toBe(3)
  56     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
  57       worker.taskFunctions.get('fn1')
  58     )
  59     expect(worker.removeTaskFunction(DEFAULT_TASK_NAME)).toStrictEqual({
  60       status: false,
  61       error: new Error(
  62         'Cannot remove the task function with the default reserved name'
  63       )
  64     })
  65     expect(worker.removeTaskFunction('fn1')).toStrictEqual({
  66       status: false,
  67       error: new Error(
  68         'Cannot remove the task function used as the default task function'
  69       )
  70     })
  71     worker.removeTaskFunction('fn2')
  72     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
  73     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
  74     expect(worker.taskFunctions.get('fn2')).toBeUndefined()
  75     expect(worker.taskFunctions.size).toBe(2)
  76     expect(worker.getMainWorker().send.calledOnce).toBe(true)
  77   })
  78
  79   it('Verify that handleError() method is working properly', () => {
  80     const error = new Error('Error as an error')
  81     const worker = new ClusterWorker(() => {})
  82     expect(worker.handleError(error)).not.toBeInstanceOf(Error)
  83     expect(worker.handleError(error)).toStrictEqual(error.message)
  84     const errorMessage = 'Error as a string'
  85     expect(worker.handleError(errorMessage)).toStrictEqual(errorMessage)
  86   })
  87
  88   it('Verify worker invokes the getMainWorker() and send() methods', () => {
  89     const worker = new SpyWorker(() => {})
  90     worker.sendToMainWorker({ ok: 1 })
  91     expect(worker.getMainWorker().send.calledOnce).toBe(true)
  92   })
  93 })