tests/worker/abstract-worker.test.js

   1 const { expect } = require('expect')
   2 const sinon = require('sinon')
   3 const { ClusterWorker, KillBehaviors, ThreadWorker } = require('../../lib')
   4 const { DEFAULT_TASK_NAME, EMPTY_FUNCTION } = require('../../lib/utils')
   5
   6 describe('Abstract worker test suite', () => {
   7   class StubWorkerWithMainWorker extends ThreadWorker {
   8     constructor (fn, opts) {
   9       super(fn, opts)
  10       this.mainWorker = undefined
  11     }
  12   }
  13
  14   afterEach(() => {
  15     sinon.restore()
  16   })
  17
  18   it('Verify worker options default values', () => {
  19     const worker = new ThreadWorker(() => {})
  20     expect(worker.opts).toStrictEqual({
  21       killBehavior: KillBehaviors.SOFT,
  22       maxInactiveTime: 60000,
  23       killHandler: EMPTY_FUNCTION
  24     })
  25   })
  26
  27   it('Verify that worker options are checked at worker creation', () => {
  28     expect(() => new ClusterWorker(() => {}, '')).toThrowError(
  29       new TypeError('opts worker options parameter is not a plain object')
  30     )
  31     expect(
  32       () => new ClusterWorker(() => {}, { killBehavior: '' })
  33     ).toThrowError(new TypeError("killBehavior option '' is not valid"))
  34     expect(() => new ClusterWorker(() => {}, { killBehavior: 0 })).toThrowError(
  35       new TypeError("killBehavior option '0' is not valid")
  36     )
  37     expect(
  38       () => new ThreadWorker(() => {}, { maxInactiveTime: '' })
  39     ).toThrowError(new TypeError('maxInactiveTime option is not an integer'))
  40     expect(
  41       () => new ThreadWorker(() => {}, { maxInactiveTime: 0.5 })
  42     ).toThrowError(new TypeError('maxInactiveTime option is not an integer'))
  43     expect(
  44       () => new ThreadWorker(() => {}, { maxInactiveTime: 0 })
  45     ).toThrowError(
  46       new TypeError(
  47         'maxInactiveTime option is not a positive integer greater or equal than 5'
  48       )
  49     )
  50     expect(
  51       () => new ThreadWorker(() => {}, { maxInactiveTime: 4 })
  52     ).toThrowError(
  53       new TypeError(
  54         'maxInactiveTime option is not a positive integer greater or equal than 5'
  55       )
  56     )
  57     expect(() => new ThreadWorker(() => {}, { killHandler: '' })).toThrowError(
  58       new TypeError('killHandler option is not a function')
  59     )
  60     expect(() => new ThreadWorker(() => {}, { killHandler: 0 })).toThrowError(
  61       new TypeError('killHandler option is not a function')
  62     )
  63     expect(() => new ThreadWorker(() => {}, { async: true })).toThrowError(
  64       new TypeError('async option is deprecated')
  65     )
  66   })
  67
  68   it('Verify that worker options are set at worker creation', () => {
  69     const killHandler = () => {
  70       console.info('Worker received kill message')
  71     }
  72     const worker = new ClusterWorker(() => {}, {
  73       killBehavior: KillBehaviors.HARD,
  74       maxInactiveTime: 6000,
  75       killHandler
  76     })
  77     expect(worker.opts).toStrictEqual({
  78       killBehavior: KillBehaviors.HARD,
  79       maxInactiveTime: 6000,
  80       killHandler
  81     })
  82   })
  83
  84   it('Verify that taskFunctions parameter is mandatory', () => {
  85     expect(() => new ClusterWorker()).toThrowError(
  86       new Error('taskFunctions parameter is mandatory')
  87     )
  88   })
  89
  90   it('Verify that taskFunctions parameter is a function or a plain object', () => {
  91     expect(() => new ClusterWorker(0)).toThrowError(
  92       new TypeError(
  93         'taskFunctions parameter is not a function or a plain object'
  94       )
  95     )
  96     expect(() => new ClusterWorker('')).toThrowError(
  97       new TypeError(
  98         'taskFunctions parameter is not a function or a plain object'
  99       )
 100     )
 101     expect(() => new ClusterWorker(true)).toThrowError(
 102       new TypeError(
 103         'taskFunctions parameter is not a function or a plain object'
 104       )
 105     )
 106     expect(() => new ClusterWorker([])).toThrowError(
 107       new TypeError(
 108         'taskFunctions parameter is not a function or a plain object'
 109       )
 110     )
 111     expect(() => new ClusterWorker(new Map())).toThrowError(
 112       new TypeError(
 113         'taskFunctions parameter is not a function or a plain object'
 114       )
 115     )
 116     expect(() => new ClusterWorker(new Set())).toThrowError(
 117       new TypeError(
 118         'taskFunctions parameter is not a function or a plain object'
 119       )
 120     )
 121     expect(() => new ClusterWorker(new WeakMap())).toThrowError(
 122       new TypeError(
 123         'taskFunctions parameter is not a function or a plain object'
 124       )
 125     )
 126     expect(() => new ClusterWorker(new WeakSet())).toThrowError(
 127       new TypeError(
 128         'taskFunctions parameter is not a function or a plain object'
 129       )
 130     )
 131   })
 132
 133   it('Verify that taskFunctions parameter is not an empty object', () => {
 134     expect(() => new ClusterWorker({})).toThrowError(
 135       new Error('taskFunctions parameter object is empty')
 136     )
 137   })
 138
 139   it('Verify that taskFunctions parameter with unique function is taken', () => {
 140     const worker = new ThreadWorker(() => {})
 141     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
 142     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
 143     expect(worker.taskFunctions.size).toBe(2)
 144     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
 145       worker.taskFunctions.get('fn1')
 146     )
 147   })
 148
 149   it('Verify that taskFunctions parameter with multiple task functions is checked', () => {
 150     const fn1 = () => {
 151       return 1
 152     }
 153     const fn2 = ''
 154     expect(() => new ThreadWorker({ '': fn1 })).toThrowError(
 155       new TypeError('A taskFunctions parameter object key is an empty string')
 156     )
 157     expect(() => new ThreadWorker({ fn1, fn2 })).toThrowError(
 158       new TypeError('A taskFunctions parameter object value is not a function')
 159     )
 160   })
 161
 162   it('Verify that taskFunctions parameter with multiple task functions is taken', () => {
 163     const fn1 = () => {
 164       return 1
 165     }
 166     const fn2 = () => {
 167       return 2
 168     }
 169     const worker = new ClusterWorker({ fn1, fn2 })
 170     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
 171     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
 172     expect(worker.taskFunctions.get('fn2')).toBeInstanceOf(Function)
 173     expect(worker.taskFunctions.size).toBe(3)
 174     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
 175       worker.taskFunctions.get('fn1')
 176     )
 177   })
 178
 179   it('Verify that sync kill handler is called when worker is killed', () => {
 180     const worker = new ClusterWorker(() => {}, {
 181       killHandler: sinon.stub().returns()
 182     })
 183     worker.isMain = false
 184     worker.getMainWorker = sinon.stub().returns({
 185       id: 1,
 186       send: sinon.stub().returns()
 187     })
 188     worker.handleKillMessage()
 189     expect(worker.getMainWorker().send.calledOnce).toBe(true)
 190     expect(worker.opts.killHandler.calledOnce).toBe(true)
 191   })
 192
 193   it('Verify that async kill handler is called when worker is killed', () => {
 194     const killHandlerStub = sinon.stub().returns()
 195     const worker = new ClusterWorker(() => {}, {
 196       killHandler: async () => Promise.resolve(killHandlerStub())
 197     })
 198     worker.isMain = false
 199     worker.handleKillMessage()
 200     expect(killHandlerStub.calledOnce).toBe(true)
 201   })
 202
 203   it('Verify that handleError() method is working properly', () => {
 204     const error = new Error('Error as an error')
 205     const worker = new ClusterWorker(() => {})
 206     expect(worker.handleError(error)).not.toBeInstanceOf(Error)
 207     expect(worker.handleError(error)).toStrictEqual(error.message)
 208     const errorMessage = 'Error as a string'
 209     expect(worker.handleError(errorMessage)).toStrictEqual(errorMessage)
 210   })
 211
 212   it('Verify that getMainWorker() throw error if main worker is not set', () => {
 213     expect(() =>
 214       new StubWorkerWithMainWorker(() => {}).getMainWorker()
 215     ).toThrowError('Main worker not set')
 216   })
 217
 218   it('Verify that hasTaskFunction() is working', () => {
 219     const fn1 = () => {
 220       return 1
 221     }
 222     const fn2 = () => {
 223       return 2
 224     }
 225     const worker = new ClusterWorker({ fn1, fn2 })
 226     expect(worker.hasTaskFunction(0)).toStrictEqual({
 227       status: false,
 228       error: new TypeError('name parameter is not a string')
 229     })
 230     expect(worker.hasTaskFunction('')).toStrictEqual({
 231       status: false,
 232       error: new TypeError('name parameter is an empty string')
 233     })
 234     expect(worker.hasTaskFunction(DEFAULT_TASK_NAME)).toStrictEqual({
 235       status: true
 236     })
 237     expect(worker.hasTaskFunction('fn1')).toStrictEqual({ status: true })
 238     expect(worker.hasTaskFunction('fn2')).toStrictEqual({ status: true })
 239     expect(worker.hasTaskFunction('fn3')).toStrictEqual({ status: false })
 240   })
 241
 242   it('Verify that addTaskFunction() is working', () => {
 243     const fn1 = () => {
 244       return 1
 245     }
 246     const fn2 = () => {
 247       return 2
 248     }
 249     const fn1Replacement = () => {
 250       return 3
 251     }
 252     const worker = new ThreadWorker(fn1)
 253     expect(worker.addTaskFunction(0, fn1)).toStrictEqual({
 254       status: false,
 255       error: new TypeError('name parameter is not a string')
 256     })
 257     expect(worker.addTaskFunction('', fn1)).toStrictEqual({
 258       status: false,
 259       error: new TypeError('name parameter is an empty string')
 260     })
 261     expect(worker.addTaskFunction('fn3', '')).toStrictEqual({
 262       status: false,
 263       error: new TypeError('fn parameter is not a function')
 264     })
 265     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
 266     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
 267     expect(worker.taskFunctions.size).toBe(2)
 268     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
 269       worker.taskFunctions.get('fn1')
 270     )
 271     expect(worker.addTaskFunction(DEFAULT_TASK_NAME, fn2)).toStrictEqual({
 272       status: false,
 273       error: new Error(
 274         'Cannot add a task function with the default reserved name'
 275       )
 276     })
 277     worker.addTaskFunction('fn2', fn2)
 278     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
 279     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
 280     expect(worker.taskFunctions.get('fn2')).toBeInstanceOf(Function)
 281     expect(worker.taskFunctions.size).toBe(3)
 282     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
 283       worker.taskFunctions.get('fn1')
 284     )
 285     worker.addTaskFunction('fn1', fn1Replacement)
 286     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
 287     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
 288     expect(worker.taskFunctions.get('fn2')).toBeInstanceOf(Function)
 289     expect(worker.taskFunctions.size).toBe(3)
 290     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
 291       worker.taskFunctions.get('fn1')
 292     )
 293   })
 294
 295   it('Verify that removeTaskFunction() is working', () => {
 296     const fn1 = () => {
 297       return 1
 298     }
 299     const fn2 = () => {
 300       return 2
 301     }
 302     const worker = new ClusterWorker({ fn1, fn2 })
 303     expect(worker.removeTaskFunction(0, fn1)).toStrictEqual({
 304       status: false,
 305       error: new TypeError('name parameter is not a string')
 306     })
 307     expect(worker.removeTaskFunction('', fn1)).toStrictEqual({
 308       status: false,
 309       error: new TypeError('name parameter is an empty string')
 310     })
 311     worker.getMainWorker = sinon.stub().returns({
 312       id: 1,
 313       send: sinon.stub().returns()
 314     })
 315     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
 316     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
 317     expect(worker.taskFunctions.get('fn2')).toBeInstanceOf(Function)
 318     expect(worker.taskFunctions.size).toBe(3)
 319     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
 320       worker.taskFunctions.get('fn1')
 321     )
 322     expect(worker.removeTaskFunction(DEFAULT_TASK_NAME)).toStrictEqual({
 323       status: false,
 324       error: new Error(
 325         'Cannot remove the task function with the default reserved name'
 326       )
 327     })
 328     expect(worker.removeTaskFunction('fn1')).toStrictEqual({
 329       status: false,
 330       error: new Error(
 331         'Cannot remove the task function used as the default task function'
 332       )
 333     })
 334     worker.removeTaskFunction('fn2')
 335     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
 336     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
 337     expect(worker.taskFunctions.get('fn2')).toBeUndefined()
 338     expect(worker.taskFunctions.size).toBe(2)
 339     expect(worker.getMainWorker().send.calledOnce).toBe(true)
 340   })
 341
 342   it('Verify that listTaskFunctionNames() is working', () => {
 343     const fn1 = () => {
 344       return 1
 345     }
 346     const fn2 = () => {
 347       return 2
 348     }
 349     const worker = new ClusterWorker({ fn1, fn2 })
 350     expect(worker.listTaskFunctionNames()).toStrictEqual([
 351       DEFAULT_TASK_NAME,
 352       'fn1',
 353       'fn2'
 354     ])
 355   })
 356
 357   it('Verify that setDefaultTaskFunction() is working', () => {
 358     const fn1 = () => {
 359       return 1
 360     }
 361     const fn2 = () => {
 362       return 2
 363     }
 364     const worker = new ThreadWorker({ fn1, fn2 })
 365     expect(worker.setDefaultTaskFunction(0, fn1)).toStrictEqual({
 366       status: false,
 367       error: new TypeError('name parameter is not a string')
 368     })
 369     expect(worker.setDefaultTaskFunction('', fn1)).toStrictEqual({
 370       status: false,
 371       error: new TypeError('name parameter is an empty string')
 372     })
 373     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
 374     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
 375     expect(worker.taskFunctions.get('fn2')).toBeInstanceOf(Function)
 376     expect(worker.taskFunctions.size).toBe(3)
 377     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
 378       worker.taskFunctions.get('fn1')
 379     )
 380     expect(worker.setDefaultTaskFunction(DEFAULT_TASK_NAME)).toStrictEqual({
 381       status: false,
 382       error: new Error(
 383         'Cannot set the default task function reserved name as the default task function'
 384       )
 385     })
 386     expect(worker.setDefaultTaskFunction('fn3')).toStrictEqual({
 387       status: false,
 388       error: new Error(
 389         'Cannot set the default task function to a non-existing task function'
 390       )
 391     })
 392     worker.setDefaultTaskFunction('fn1')
 393     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
 394       worker.taskFunctions.get('fn1')
 395     )
 396     worker.setDefaultTaskFunction('fn2')
 397     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
 398       worker.taskFunctions.get('fn2')
 399     )
 400   })
 401 })