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 set at worker creation', () => {
  28     const killHandler = () => {
  29       console.info('Worker received kill message')
  30     }
  31     const worker = new ClusterWorker(() => {}, {
  32       killBehavior: KillBehaviors.HARD,
  33       maxInactiveTime: 6000,
  34       killHandler,
  35       async: true
  36     })
  37     expect(worker.opts).toStrictEqual({
  38       killBehavior: KillBehaviors.HARD,
  39       maxInactiveTime: 6000,
  40       killHandler
  41     })
  42   })
  43
  44   it('Verify that taskFunctions parameter is mandatory', () => {
  45     expect(() => new ClusterWorker()).toThrowError(
  46       'taskFunctions parameter is mandatory'
  47     )
  48   })
  49
  50   it('Verify that taskFunctions parameter is a function or a plain object', () => {
  51     expect(() => new ClusterWorker(0)).toThrowError(
  52       new TypeError(
  53         'taskFunctions parameter is not a function or a plain object'
  54       )
  55     )
  56     expect(() => new ClusterWorker('')).toThrowError(
  57       new TypeError(
  58         'taskFunctions parameter is not a function or a plain object'
  59       )
  60     )
  61     expect(() => new ClusterWorker(true)).toThrowError(
  62       new TypeError(
  63         'taskFunctions parameter is not a function or a plain object'
  64       )
  65     )
  66     expect(() => new ClusterWorker([])).toThrowError(
  67       new TypeError(
  68         'taskFunctions parameter is not a function or a plain object'
  69       )
  70     )
  71     expect(() => new ClusterWorker(new Map())).toThrowError(
  72       new TypeError(
  73         'taskFunctions parameter is not a function or a plain object'
  74       )
  75     )
  76     expect(() => new ClusterWorker(new Set())).toThrowError(
  77       new TypeError(
  78         'taskFunctions parameter is not a function or a plain object'
  79       )
  80     )
  81     expect(() => new ClusterWorker(new WeakMap())).toThrowError(
  82       new TypeError(
  83         'taskFunctions parameter is not a function or a plain object'
  84       )
  85     )
  86     expect(() => new ClusterWorker(new WeakSet())).toThrowError(
  87       new TypeError(
  88         'taskFunctions parameter is not a function or a plain object'
  89       )
  90     )
  91   })
  92
  93   it('Verify that taskFunctions parameter is not an empty object', () => {
  94     expect(() => new ClusterWorker({})).toThrowError(
  95       new Error('taskFunctions parameter object is empty')
  96     )
  97   })
  98
  99   it('Verify that taskFunctions parameter with unique function is taken', () => {
 100     const worker = new ThreadWorker(() => {})
 101     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
 102     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
 103     expect(worker.taskFunctions.size).toBe(2)
 104     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
 105       worker.taskFunctions.get('fn1')
 106     )
 107   })
 108
 109   it('Verify that taskFunctions parameter with multiple task functions is checked', () => {
 110     const fn1 = () => {
 111       return 1
 112     }
 113     const fn2 = ''
 114     expect(() => new ThreadWorker({ '': fn1 })).toThrowError(
 115       new TypeError('A taskFunctions parameter object key is an empty string')
 116     )
 117     expect(() => new ThreadWorker({ fn1, fn2 })).toThrowError(
 118       new TypeError('A taskFunctions parameter object value is not a function')
 119     )
 120   })
 121
 122   it('Verify that taskFunctions parameter with multiple task functions is taken', () => {
 123     const fn1 = () => {
 124       return 1
 125     }
 126     const fn2 = () => {
 127       return 2
 128     }
 129     const worker = new ClusterWorker({ fn1, fn2 })
 130     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
 131     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
 132     expect(worker.taskFunctions.get('fn2')).toBeInstanceOf(Function)
 133     expect(worker.taskFunctions.size).toBe(3)
 134     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
 135       worker.taskFunctions.get('fn1')
 136     )
 137   })
 138
 139   it('Verify that sync kill handler is called when worker is killed', () => {
 140     const worker = new ClusterWorker(() => {}, {
 141       killHandler: sinon.stub().returns()
 142     })
 143     worker.isMain = false
 144     worker.getMainWorker = sinon.stub().returns({
 145       id: 1,
 146       send: sinon.stub().returns()
 147     })
 148     worker.handleKillMessage()
 149     expect(worker.getMainWorker().send.calledOnce).toBe(true)
 150     expect(worker.opts.killHandler.calledOnce).toBe(true)
 151   })
 152
 153   it('Verify that async kill handler is called when worker is killed', () => {
 154     const killHandlerStub = sinon.stub().returns()
 155     const worker = new ClusterWorker(() => {}, {
 156       killHandler: async () => Promise.resolve(killHandlerStub())
 157     })
 158     worker.isMain = false
 159     worker.handleKillMessage()
 160     expect(killHandlerStub.calledOnce).toBe(true)
 161   })
 162
 163   it('Verify that handleError() method works properly', () => {
 164     const error = new Error('Error as an error')
 165     const worker = new ClusterWorker(() => {})
 166     expect(worker.handleError(error)).not.toBeInstanceOf(Error)
 167     expect(worker.handleError(error)).toStrictEqual(error.message)
 168     const errorMessage = 'Error as a string'
 169     expect(worker.handleError(errorMessage)).toStrictEqual(errorMessage)
 170   })
 171
 172   it('Verify that getMainWorker() throw error if main worker is not set', () => {
 173     expect(() =>
 174       new StubWorkerWithMainWorker(() => {}).getMainWorker()
 175     ).toThrowError('Main worker not set')
 176   })
 177
 178   it('Verify that hasTaskFunction() works', () => {
 179     const fn1 = () => {
 180       return 1
 181     }
 182     const fn2 = () => {
 183       return 2
 184     }
 185     const worker = new ClusterWorker({ fn1, fn2 })
 186     expect(() => worker.hasTaskFunction(0)).toThrowError(
 187       new TypeError('name parameter is not a string')
 188     )
 189     expect(() => worker.hasTaskFunction('')).toThrowError(
 190       new TypeError('name parameter is an empty string')
 191     )
 192     expect(worker.hasTaskFunction(DEFAULT_TASK_NAME)).toBe(true)
 193     expect(worker.hasTaskFunction('fn1')).toBe(true)
 194     expect(worker.hasTaskFunction('fn2')).toBe(true)
 195     expect(worker.hasTaskFunction('fn3')).toBe(false)
 196   })
 197
 198   it('Verify that addTaskFunction() works', () => {
 199     const fn1 = () => {
 200       return 1
 201     }
 202     const fn2 = () => {
 203       return 2
 204     }
 205     const fn1Replacement = () => {
 206       return 3
 207     }
 208     const worker = new ThreadWorker(fn1)
 209     expect(() => worker.addTaskFunction(0, fn1)).toThrowError(
 210       new TypeError('name parameter is not a string')
 211     )
 212     expect(() => worker.addTaskFunction('', fn1)).toThrowError(
 213       new TypeError('name parameter is an empty string')
 214     )
 215     expect(() => worker.addTaskFunction('fn3', '')).toThrowError(
 216       new TypeError('fn parameter is not a function')
 217     )
 218     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
 219     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
 220     expect(worker.taskFunctions.size).toBe(2)
 221     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
 222       worker.taskFunctions.get('fn1')
 223     )
 224     expect(() => worker.addTaskFunction(DEFAULT_TASK_NAME, fn2)).toThrowError(
 225       new Error('Cannot add a task function with the default reserved name')
 226     )
 227     worker.addTaskFunction('fn2', fn2)
 228     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
 229     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
 230     expect(worker.taskFunctions.get('fn2')).toBeInstanceOf(Function)
 231     expect(worker.taskFunctions.size).toBe(3)
 232     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
 233       worker.taskFunctions.get('fn1')
 234     )
 235     worker.addTaskFunction('fn1', fn1Replacement)
 236     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
 237     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
 238     expect(worker.taskFunctions.get('fn2')).toBeInstanceOf(Function)
 239     expect(worker.taskFunctions.size).toBe(3)
 240     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
 241       worker.taskFunctions.get('fn1')
 242     )
 243   })
 244
 245   it('Verify that removeTaskFunction() works', () => {
 246     const fn1 = () => {
 247       return 1
 248     }
 249     const fn2 = () => {
 250       return 2
 251     }
 252     const worker = new ClusterWorker({ fn1, fn2 })
 253     expect(() => worker.removeTaskFunction(0, fn1)).toThrowError(
 254       new TypeError('name parameter is not a string')
 255     )
 256     expect(() => worker.removeTaskFunction('', fn1)).toThrowError(
 257       new TypeError('name parameter is an empty string')
 258     )
 259     worker.getMainWorker = sinon.stub().returns({
 260       id: 1,
 261       send: sinon.stub().returns()
 262     })
 263     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
 264     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
 265     expect(worker.taskFunctions.get('fn2')).toBeInstanceOf(Function)
 266     expect(worker.taskFunctions.size).toBe(3)
 267     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
 268       worker.taskFunctions.get('fn1')
 269     )
 270     expect(() => worker.removeTaskFunction(DEFAULT_TASK_NAME)).toThrowError(
 271       new Error(
 272         'Cannot remove the task function with the default reserved name'
 273       )
 274     )
 275     expect(() => worker.removeTaskFunction('fn1')).toThrowError(
 276       new Error(
 277         'Cannot remove the task function used as the default task function'
 278       )
 279     )
 280     worker.removeTaskFunction('fn2')
 281     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
 282     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
 283     expect(worker.taskFunctions.get('fn2')).toBeUndefined()
 284     expect(worker.taskFunctions.size).toBe(2)
 285     expect(worker.getMainWorker().send.calledOnce).toBe(true)
 286   })
 287
 288   it('Verify that listTaskFunctions() works', () => {
 289     const fn1 = () => {
 290       return 1
 291     }
 292     const fn2 = () => {
 293       return 2
 294     }
 295     const worker = new ClusterWorker({ fn1, fn2 })
 296     expect(worker.listTaskFunctions()).toStrictEqual([
 297       DEFAULT_TASK_NAME,
 298       'fn1',
 299       'fn2'
 300     ])
 301   })
 302
 303   it('Verify that setDefaultTaskFunction() works', () => {
 304     const fn1 = () => {
 305       return 1
 306     }
 307     const fn2 = () => {
 308       return 2
 309     }
 310     const worker = new ThreadWorker({ fn1, fn2 })
 311     expect(() => worker.setDefaultTaskFunction(0, fn1)).toThrowError(
 312       new TypeError('name parameter is not a string')
 313     )
 314     expect(() => worker.setDefaultTaskFunction('', fn1)).toThrowError(
 315       new TypeError('name parameter is an empty string')
 316     )
 317     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toBeInstanceOf(Function)
 318     expect(worker.taskFunctions.get('fn1')).toBeInstanceOf(Function)
 319     expect(worker.taskFunctions.get('fn2')).toBeInstanceOf(Function)
 320     expect(worker.taskFunctions.size).toBe(3)
 321     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
 322       worker.taskFunctions.get('fn1')
 323     )
 324     expect(() => worker.setDefaultTaskFunction(DEFAULT_TASK_NAME)).toThrowError(
 325       new Error(
 326         'Cannot set the default task function reserved name as the default task function'
 327       )
 328     )
 329     expect(() => worker.setDefaultTaskFunction('fn3')).toThrowError(
 330       new Error(
 331         'Cannot set the default task function to a non-existing task function'
 332       )
 333     )
 334     worker.setDefaultTaskFunction('fn1')
 335     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
 336       worker.taskFunctions.get('fn1')
 337     )
 338     worker.setDefaultTaskFunction('fn2')
 339     expect(worker.taskFunctions.get(DEFAULT_TASK_NAME)).toStrictEqual(
 340       worker.taskFunctions.get('fn2')
 341     )
 342   })
 343 })