1 const { expect
} = require('expect')
8 WorkerChoiceStrategies
,
11 } = require('../../../lib')
12 const { CircularArray
} = require('../../../lib/circular-array')
13 const { Queue
} = require('../../../lib/queue')
15 describe('Abstract pool test suite', () => {
16 const numberOfWorkers
= 2
17 class StubPoolWithRemoveAllWorker
extends FixedThreadPool
{
20 this.promiseResponseMap
.clear()
23 class StubPoolWithIsMain
extends FixedThreadPool
{
29 it('Simulate pool creation from a non main thread/process', () => {
32 new StubPoolWithIsMain(
34 './tests/worker-files/thread/testWorker.js',
36 errorHandler
: e
=> console
.error(e
)
39 ).toThrowError('Cannot start a pool from a worker!')
42 it('Verify that filePath is checked', () => {
43 const expectedError
= new Error(
44 'Please specify a file with a worker implementation'
46 expect(() => new FixedThreadPool(numberOfWorkers
)).toThrowError(
49 expect(() => new FixedThreadPool(numberOfWorkers
, '')).toThrowError(
54 it('Verify that numberOfWorkers is checked', () => {
55 expect(() => new FixedThreadPool()).toThrowError(
56 'Cannot instantiate a pool without specifying the number of workers'
60 it('Verify that a negative number of workers is checked', () => {
63 new FixedClusterPool(-1, './tests/worker-files/cluster/testWorker.js')
66 'Cannot instantiate a pool with a negative number of workers'
71 it('Verify that a non integer number of workers is checked', () => {
74 new FixedThreadPool(0.25, './tests/worker-files/thread/testWorker.js')
77 'Cannot instantiate a pool with a non safe integer number of workers'
82 it('Verify that pool options are checked', async () => {
83 let pool
= new FixedThreadPool(
85 './tests/worker-files/thread/testWorker.js'
87 expect(pool
.emitter
).toBeDefined()
88 expect(pool
.opts
.enableEvents
).toBe(true)
89 expect(pool
.opts
.restartWorkerOnError
).toBe(true)
90 expect(pool
.opts
.enableTasksQueue
).toBe(false)
91 expect(pool
.opts
.tasksQueueOptions
).toBeUndefined()
92 expect(pool
.opts
.workerChoiceStrategy
).toBe(
93 WorkerChoiceStrategies
.ROUND_ROBIN
95 expect(pool
.opts
.workerChoiceStrategyOptions
).toStrictEqual({
96 runTime
: { median
: false },
97 waitTime
: { median
: false },
98 elu
: { median
: false }
100 expect(pool
.opts
.messageHandler
).toBeUndefined()
101 expect(pool
.opts
.errorHandler
).toBeUndefined()
102 expect(pool
.opts
.onlineHandler
).toBeUndefined()
103 expect(pool
.opts
.exitHandler
).toBeUndefined()
105 const testHandler
= () => console
.log('test handler executed')
106 pool
= new FixedThreadPool(
108 './tests/worker-files/thread/testWorker.js',
110 workerChoiceStrategy
: WorkerChoiceStrategies
.LEAST_USED
,
111 workerChoiceStrategyOptions
: {
112 runTime
: { median
: true },
113 weights
: { 0: 300, 1: 200 }
116 restartWorkerOnError
: false,
117 enableTasksQueue
: true,
118 tasksQueueOptions
: { concurrency
: 2 },
119 messageHandler
: testHandler
,
120 errorHandler
: testHandler
,
121 onlineHandler
: testHandler
,
122 exitHandler
: testHandler
125 expect(pool
.emitter
).toBeUndefined()
126 expect(pool
.opts
.enableEvents
).toBe(false)
127 expect(pool
.opts
.restartWorkerOnError
).toBe(false)
128 expect(pool
.opts
.enableTasksQueue
).toBe(true)
129 expect(pool
.opts
.tasksQueueOptions
).toStrictEqual({ concurrency
: 2 })
130 expect(pool
.opts
.workerChoiceStrategy
).toBe(
131 WorkerChoiceStrategies
.LEAST_USED
133 expect(pool
.opts
.workerChoiceStrategyOptions
).toStrictEqual({
134 runTime
: { median
: true },
135 weights
: { 0: 300, 1: 200 }
137 expect(pool
.opts
.messageHandler
).toStrictEqual(testHandler
)
138 expect(pool
.opts
.errorHandler
).toStrictEqual(testHandler
)
139 expect(pool
.opts
.onlineHandler
).toStrictEqual(testHandler
)
140 expect(pool
.opts
.exitHandler
).toStrictEqual(testHandler
)
144 it('Verify that pool options are validated', async () => {
149 './tests/worker-files/thread/testWorker.js',
151 workerChoiceStrategy
: 'invalidStrategy'
154 ).toThrowError("Invalid worker choice strategy 'invalidStrategy'")
159 './tests/worker-files/thread/testWorker.js',
161 workerChoiceStrategyOptions
: 'invalidOptions'
165 'Invalid worker choice strategy options: must be a plain object'
171 './tests/worker-files/thread/testWorker.js',
173 workerChoiceStrategyOptions
: { weights
: {} }
177 'Invalid worker choice strategy options: must have a weight for each worker node'
183 './tests/worker-files/thread/testWorker.js',
185 workerChoiceStrategyOptions
: { measurement
: 'invalidMeasurement' }
189 "Invalid worker choice strategy options: invalid measurement 'invalidMeasurement'"
195 './tests/worker-files/thread/testWorker.js',
197 enableTasksQueue
: true,
198 tasksQueueOptions
: { concurrency
: 0 }
201 ).toThrowError("Invalid worker tasks concurrency '0'")
206 './tests/worker-files/thread/testWorker.js',
208 enableTasksQueue
: true,
209 tasksQueueOptions
: 'invalidTasksQueueOptions'
212 ).toThrowError('Invalid tasks queue options: must be a plain object')
217 './tests/worker-files/thread/testWorker.js',
219 enableTasksQueue
: true,
220 tasksQueueOptions
: { concurrency
: 0.2 }
223 ).toThrowError('Invalid worker tasks concurrency: must be an integer')
226 it('Verify that worker choice strategy options can be set', async () => {
227 const pool
= new FixedThreadPool(
229 './tests/worker-files/thread/testWorker.js',
230 { workerChoiceStrategy
: WorkerChoiceStrategies
.FAIR_SHARE
}
232 expect(pool
.opts
.workerChoiceStrategyOptions
).toStrictEqual({
233 runTime
: { median
: false },
234 waitTime
: { median
: false },
235 elu
: { median
: false }
237 for (const [, workerChoiceStrategy
] of pool
.workerChoiceStrategyContext
238 .workerChoiceStrategies
) {
239 expect(workerChoiceStrategy
.opts
).toStrictEqual({
240 runTime
: { median
: false },
241 waitTime
: { median
: false },
242 elu
: { median
: false }
246 pool
.workerChoiceStrategyContext
.getTaskStatisticsRequirements()
264 pool
.setWorkerChoiceStrategyOptions({
265 runTime
: { median
: true },
266 elu
: { median
: true }
268 expect(pool
.opts
.workerChoiceStrategyOptions
).toStrictEqual({
269 runTime
: { median
: true },
270 elu
: { median
: true }
272 for (const [, workerChoiceStrategy
] of pool
.workerChoiceStrategyContext
273 .workerChoiceStrategies
) {
274 expect(workerChoiceStrategy
.opts
).toStrictEqual({
275 runTime
: { median
: true },
276 elu
: { median
: true }
280 pool
.workerChoiceStrategyContext
.getTaskStatisticsRequirements()
298 pool
.setWorkerChoiceStrategyOptions({
299 runTime
: { median
: false },
300 elu
: { median
: false }
302 expect(pool
.opts
.workerChoiceStrategyOptions
).toStrictEqual({
303 runTime
: { median
: false },
304 elu
: { median
: false }
306 for (const [, workerChoiceStrategy
] of pool
.workerChoiceStrategyContext
307 .workerChoiceStrategies
) {
308 expect(workerChoiceStrategy
.opts
).toStrictEqual({
309 runTime
: { median
: false },
310 elu
: { median
: false }
314 pool
.workerChoiceStrategyContext
.getTaskStatisticsRequirements()
333 pool
.setWorkerChoiceStrategyOptions('invalidWorkerChoiceStrategyOptions')
335 'Invalid worker choice strategy options: must be a plain object'
338 pool
.setWorkerChoiceStrategyOptions({ weights
: {} })
340 'Invalid worker choice strategy options: must have a weight for each worker node'
343 pool
.setWorkerChoiceStrategyOptions({ measurement
: 'invalidMeasurement' })
345 "Invalid worker choice strategy options: invalid measurement 'invalidMeasurement'"
350 it('Verify that tasks queue can be enabled/disabled', async () => {
351 const pool
= new FixedThreadPool(
353 './tests/worker-files/thread/testWorker.js'
355 expect(pool
.opts
.enableTasksQueue
).toBe(false)
356 expect(pool
.opts
.tasksQueueOptions
).toBeUndefined()
357 pool
.enableTasksQueue(true)
358 expect(pool
.opts
.enableTasksQueue
).toBe(true)
359 expect(pool
.opts
.tasksQueueOptions
).toStrictEqual({ concurrency
: 1 })
360 pool
.enableTasksQueue(true, { concurrency
: 2 })
361 expect(pool
.opts
.enableTasksQueue
).toBe(true)
362 expect(pool
.opts
.tasksQueueOptions
).toStrictEqual({ concurrency
: 2 })
363 pool
.enableTasksQueue(false)
364 expect(pool
.opts
.enableTasksQueue
).toBe(false)
365 expect(pool
.opts
.tasksQueueOptions
).toBeUndefined()
369 it('Verify that tasks queue options can be set', async () => {
370 const pool
= new FixedThreadPool(
372 './tests/worker-files/thread/testWorker.js',
373 { enableTasksQueue
: true }
375 expect(pool
.opts
.tasksQueueOptions
).toStrictEqual({ concurrency
: 1 })
376 pool
.setTasksQueueOptions({ concurrency
: 2 })
377 expect(pool
.opts
.tasksQueueOptions
).toStrictEqual({ concurrency
: 2 })
379 pool
.setTasksQueueOptions('invalidTasksQueueOptions')
380 ).toThrowError('Invalid tasks queue options: must be a plain object')
381 expect(() => pool
.setTasksQueueOptions({ concurrency
: 0 })).toThrowError(
382 "Invalid worker tasks concurrency '0'"
384 expect(() => pool
.setTasksQueueOptions({ concurrency
: 0.2 })).toThrowError(
385 'Invalid worker tasks concurrency: must be an integer'
390 it('Verify that pool info is set', async () => {
391 let pool
= new FixedThreadPool(
393 './tests/worker-files/thread/testWorker.js'
395 expect(pool
.info
).toStrictEqual({
396 type
: PoolTypes
.fixed
,
397 worker
: WorkerTypes
.thread
,
398 minSize
: numberOfWorkers
,
399 maxSize
: numberOfWorkers
,
400 workerNodes
: numberOfWorkers
,
401 idleWorkerNodes
: numberOfWorkers
,
410 pool
= new DynamicClusterPool(
413 './tests/worker-files/thread/testWorker.js'
415 expect(pool
.info
).toStrictEqual({
416 type
: PoolTypes
.dynamic
,
417 worker
: WorkerTypes
.cluster
,
418 minSize
: numberOfWorkers
,
419 maxSize
: numberOfWorkers
* 2,
420 workerNodes
: numberOfWorkers
,
421 idleWorkerNodes
: numberOfWorkers
,
432 it('Simulate worker not found', async () => {
433 const pool
= new StubPoolWithRemoveAllWorker(
435 './tests/worker-files/cluster/testWorker.js',
437 errorHandler
: e
=> console
.error(e
)
440 expect(pool
.workerNodes
.length
).toBe(numberOfWorkers
)
441 // Simulate worker not found.
442 pool
.removeAllWorker()
443 expect(pool
.workerNodes
.length
).toBe(0)
447 it('Verify that worker pool tasks usage are initialized', async () => {
448 const pool
= new FixedClusterPool(
450 './tests/worker-files/cluster/testWorker.js'
452 for (const workerNode
of pool
.workerNodes
) {
453 expect(workerNode
.workerUsage
).toStrictEqual({
465 history
: expect
.any(CircularArray
)
471 history
: expect
.any(CircularArray
)
478 history
: expect
.any(CircularArray
)
484 history
: expect
.any(CircularArray
)
493 it('Verify that worker pool tasks queue are initialized', async () => {
494 const pool
= new FixedClusterPool(
496 './tests/worker-files/cluster/testWorker.js'
498 for (const workerNode
of pool
.workerNodes
) {
499 expect(workerNode
.tasksQueue
).toBeDefined()
500 expect(workerNode
.tasksQueue
).toBeInstanceOf(Queue
)
501 expect(workerNode
.tasksQueue
.size
).toBe(0)
502 expect(workerNode
.tasksQueue
.maxSize
).toBe(0)
507 it('Verify that worker pool tasks usage are computed', async () => {
508 const pool
= new FixedClusterPool(
510 './tests/worker-files/cluster/testWorker.js'
512 const promises
= new Set()
513 const maxMultiplier
= 2
514 for (let i
= 0; i
< numberOfWorkers
* maxMultiplier
; i
++) {
515 promises
.add(pool
.execute())
517 for (const workerNode
of pool
.workerNodes
) {
518 expect(workerNode
.workerUsage
).toStrictEqual({
521 executing
: maxMultiplier
,
530 history
: expect
.any(CircularArray
)
536 history
: expect
.any(CircularArray
)
543 history
: expect
.any(CircularArray
)
549 history
: expect
.any(CircularArray
)
555 await Promise
.all(promises
)
556 for (const workerNode
of pool
.workerNodes
) {
557 expect(workerNode
.workerUsage
).toStrictEqual({
559 executed
: maxMultiplier
,
569 history
: expect
.any(CircularArray
)
575 history
: expect
.any(CircularArray
)
582 history
: expect
.any(CircularArray
)
588 history
: expect
.any(CircularArray
)
597 it('Verify that worker pool tasks usage are reset at worker choice strategy change', async () => {
598 const pool
= new DynamicThreadPool(
601 './tests/worker-files/thread/testWorker.js'
603 const promises
= new Set()
604 const maxMultiplier
= 2
605 for (let i
= 0; i
< numberOfWorkers
* maxMultiplier
; i
++) {
606 promises
.add(pool
.execute())
608 await Promise
.all(promises
)
609 for (const workerNode
of pool
.workerNodes
) {
610 expect(workerNode
.workerUsage
).toStrictEqual({
612 executed
: expect
.any(Number
),
622 history
: expect
.any(CircularArray
)
628 history
: expect
.any(CircularArray
)
635 history
: expect
.any(CircularArray
)
641 history
: expect
.any(CircularArray
)
646 expect(workerNode
.workerUsage
.tasks
.executed
).toBeGreaterThan(0)
647 expect(workerNode
.workerUsage
.tasks
.executed
).toBeLessThanOrEqual(
651 pool
.setWorkerChoiceStrategy(WorkerChoiceStrategies
.FAIR_SHARE
)
652 for (const workerNode
of pool
.workerNodes
) {
653 expect(workerNode
.workerUsage
).toStrictEqual({
665 history
: expect
.any(CircularArray
)
671 history
: expect
.any(CircularArray
)
678 history
: expect
.any(CircularArray
)
684 history
: expect
.any(CircularArray
)
689 expect(workerNode
.workerUsage
.runTime
.history
.length
).toBe(0)
690 expect(workerNode
.workerUsage
.waitTime
.history
.length
).toBe(0)
695 it("Verify that pool event emitter 'full' event can register a callback", async () => {
696 const pool
= new DynamicThreadPool(
699 './tests/worker-files/thread/testWorker.js'
701 const promises
= new Set()
704 pool
.emitter
.on(PoolEvents
.full
, info
=> {
708 for (let i
= 0; i
< numberOfWorkers
* 2; i
++) {
709 promises
.add(pool
.execute())
711 await Promise
.all(promises
)
712 // The `full` event is triggered when the number of submitted tasks at once reach the max number of workers in the dynamic pool.
713 // So in total numberOfWorkers * 2 times for a loop submitting up to numberOfWorkers * 2 tasks to the dynamic pool with min = max = numberOfWorkers.
714 expect(poolFull
).toBe(numberOfWorkers
* 2)
715 expect(poolInfo
).toStrictEqual({
716 type
: PoolTypes
.dynamic
,
717 worker
: WorkerTypes
.thread
,
718 minSize
: expect
.any(Number
),
719 maxSize
: expect
.any(Number
),
720 workerNodes
: expect
.any(Number
),
721 idleWorkerNodes
: expect
.any(Number
),
722 busyWorkerNodes
: expect
.any(Number
),
723 executedTasks
: expect
.any(Number
),
724 executingTasks
: expect
.any(Number
),
725 queuedTasks
: expect
.any(Number
),
726 maxQueuedTasks
: expect
.any(Number
),
727 failedTasks
: expect
.any(Number
)
732 it("Verify that pool event emitter 'busy' event can register a callback", async () => {
733 const pool
= new FixedThreadPool(
735 './tests/worker-files/thread/testWorker.js'
737 const promises
= new Set()
740 pool
.emitter
.on(PoolEvents
.busy
, info
=> {
744 for (let i
= 0; i
< numberOfWorkers
* 2; i
++) {
745 promises
.add(pool
.execute())
747 await Promise
.all(promises
)
748 // The `busy` event is triggered when the number of submitted tasks at once reach the number of fixed pool workers.
749 // So in total numberOfWorkers + 1 times for a loop submitting up to numberOfWorkers * 2 tasks to the fixed pool.
750 expect(poolBusy
).toBe(numberOfWorkers
+ 1)
751 expect(poolInfo
).toStrictEqual({
752 type
: PoolTypes
.fixed
,
753 worker
: WorkerTypes
.thread
,
754 minSize
: expect
.any(Number
),
755 maxSize
: expect
.any(Number
),
756 workerNodes
: expect
.any(Number
),
757 idleWorkerNodes
: expect
.any(Number
),
758 busyWorkerNodes
: expect
.any(Number
),
759 executedTasks
: expect
.any(Number
),
760 executingTasks
: expect
.any(Number
),
761 queuedTasks
: expect
.any(Number
),
762 maxQueuedTasks
: expect
.any(Number
),
763 failedTasks
: expect
.any(Number
)
768 it('Verify that multiple tasks worker is working', async () => {
769 const pool
= new DynamicClusterPool(
772 './tests/worker-files/cluster/testMultiTasksWorker.js'
774 const data
= { n
: 10 }
775 const result0
= await pool
.execute(data
)
776 expect(result0
).toBe(false)
777 const result1
= await pool
.execute(data
, 'jsonIntegerSerialization')
778 expect(result1
).toBe(false)
779 const result2
= await pool
.execute(data
, 'factorial')
780 expect(result2
).toBe(3628800)
781 const result3
= await pool
.execute(data
, 'fibonacci')
782 expect(result3
).toBe(55)