-const expect = require('expect')
-const { FixedThreadPool } = require('../../../lib/index')
+const { expect } = require('expect')
+const { FixedThreadPool, PoolEvents } = require('../../../lib')
+const { WorkerFunctions } = require('../../test-types')
const TestUtils = require('../../test-utils')
-const numberOfThreads = 10
-const pool = new FixedThreadPool(
- numberOfThreads,
- './tests/worker-files/thread/testWorker.js',
- {
- errorHandler: e => console.error(e)
- }
-)
-const emptyPool = new FixedThreadPool(
- 1,
- './tests/worker-files/thread/emptyWorker.js',
- { exitHandler: () => console.log('empty pool worker exited') }
-)
-const echoPool = new FixedThreadPool(
- 1,
- './tests/worker-files/thread/echoWorker.js'
-)
-const errorPool = new FixedThreadPool(
- 1,
- './tests/worker-files/thread/errorWorker.js',
- {
- errorHandler: e => console.error(e),
- onlineHandler: () => console.log('worker is online')
- }
-)
-const asyncErrorPool = new FixedThreadPool(
- 1,
- './tests/worker-files/thread/asyncErrorWorker.js',
- {
- errorHandler: e => console.error(e),
- onlineHandler: () => console.log('worker is online')
- }
-)
-const asyncPool = new FixedThreadPool(
- 1,
- './tests/worker-files/thread/asyncWorker.js'
-)
describe('Fixed thread pool test suite', () => {
+ const numberOfThreads = 6
+ const pool = new FixedThreadPool(
+ numberOfThreads,
+ './tests/worker-files/thread/testWorker.js',
+ {
+ errorHandler: e => console.error(e)
+ }
+ )
+ const queuePool = new FixedThreadPool(
+ numberOfThreads,
+ './tests/worker-files/thread/testWorker.js',
+ {
+ enableTasksQueue: true,
+ tasksQueueOptions: {
+ concurrency: 2
+ },
+ errorHandler: e => console.error(e)
+ }
+ )
+ const emptyPool = new FixedThreadPool(
+ numberOfThreads,
+ './tests/worker-files/thread/emptyWorker.js',
+ { exitHandler: () => console.log('empty pool worker exited') }
+ )
+ const echoPool = new FixedThreadPool(
+ numberOfThreads,
+ './tests/worker-files/thread/echoWorker.js'
+ )
+ const errorPool = new FixedThreadPool(
+ numberOfThreads,
+ './tests/worker-files/thread/errorWorker.js',
+ {
+ errorHandler: e => console.error(e)
+ }
+ )
+ const asyncErrorPool = new FixedThreadPool(
+ numberOfThreads,
+ './tests/worker-files/thread/asyncErrorWorker.js',
+ {
+ errorHandler: e => console.error(e)
+ }
+ )
+ const asyncPool = new FixedThreadPool(
+ numberOfThreads,
+ './tests/worker-files/thread/asyncWorker.js'
+ )
+
after('Destroy all pools', async () => {
// We need to clean up the resources after our test
await echoPool.destroy()
await errorPool.destroy()
await asyncErrorPool.destroy()
await emptyPool.destroy()
- })
-
- it('Choose worker round robin test', async () => {
- const results = new Set()
- for (let i = 0; i < numberOfThreads; i++) {
- results.add(pool.chooseWorker().threadId)
- }
- expect(results.size).toBe(numberOfThreads)
+ await queuePool.destroy()
})
it('Verify that the function is executed in a worker thread', async () => {
- const result = await pool.execute({ test: 'test' })
- expect(result).toBeDefined()
- expect(result).toBeFalsy()
+ let result = await pool.execute({
+ function: WorkerFunctions.fibonacci
+ })
+ expect(result).toBe(75025)
+ result = await pool.execute({
+ function: WorkerFunctions.factorial
+ })
+ expect(result).toBe(9.33262154439441e157)
})
- it('Verify that is possible to invoke the execute method without input', async () => {
+ it('Verify that is possible to invoke the execute() method without input', async () => {
const result = await pool.execute()
- expect(result).toBeDefined()
- expect(result).toBeFalsy()
+ expect(result).toBe(false)
})
- it('Verify that busy event is emitted', async () => {
- const promises = []
+ it("Verify that 'busy' event is emitted", async () => {
let poolBusy = 0
- pool.emitter.on('busy', () => poolBusy++)
+ pool.emitter.on(PoolEvents.busy, () => ++poolBusy)
for (let i = 0; i < numberOfThreads * 2; i++) {
- promises.push(pool.execute({ test: 'test' }))
+ pool.execute()
+ }
+ // The `busy` event is triggered when the number of submitted tasks at once reach the number of fixed pool workers.
+ // So in total numberOfThreads + 1 times for a loop submitting up to numberOfThreads * 2 tasks to the fixed pool.
+ expect(poolBusy).toBe(numberOfThreads + 1)
+ })
+
+ it('Verify that tasks queuing is working', async () => {
+ const promises = new Set()
+ const maxMultiplier = 2
+ for (let i = 0; i < numberOfThreads * maxMultiplier; i++) {
+ promises.add(queuePool.execute())
+ }
+ expect(promises.size).toBe(numberOfThreads * maxMultiplier)
+ for (const workerNode of queuePool.workerNodes) {
+ expect(workerNode.usage.tasks.executing).toBeLessThanOrEqual(
+ queuePool.opts.tasksQueueOptions.concurrency
+ )
+ expect(workerNode.usage.tasks.executed).toBe(0)
+ expect(workerNode.usage.tasks.queued).toBeGreaterThan(0)
+ expect(workerNode.usage.tasks.maxQueued).toBeGreaterThan(0)
+ }
+ expect(queuePool.info.executingTasks).toBe(numberOfThreads)
+ expect(queuePool.info.queuedTasks).toBe(
+ numberOfThreads * maxMultiplier - numberOfThreads
+ )
+ expect(queuePool.info.maxQueuedTasks).toBe(
+ numberOfThreads * maxMultiplier - numberOfThreads
+ )
+ await Promise.all(promises)
+ for (const workerNode of queuePool.workerNodes) {
+ expect(workerNode.usage.tasks.executing).toBe(0)
+ expect(workerNode.usage.tasks.executed).toBeGreaterThan(0)
+ expect(workerNode.usage.tasks.executed).toBeLessThanOrEqual(maxMultiplier)
+ expect(workerNode.usage.tasks.queued).toBe(0)
+ expect(workerNode.usage.tasks.maxQueued).toBe(1)
}
- expect(poolBusy).toEqual(numberOfThreads)
})
it('Verify that is possible to have a worker that return undefined', async () => {
const result = await emptyPool.execute()
- expect(result).toBeFalsy()
+ expect(result).toBeUndefined()
})
it('Verify that data are sent to the worker correctly', async () => {
const data = { f: 10 }
const result = await echoPool.execute(data)
- expect(result).toBeTruthy()
- expect(result.f).toBe(data.f)
+ expect(result).toStrictEqual(data)
})
it('Verify that error handling is working properly:sync', async () => {
const data = { f: 10 }
+ let taskError
+ errorPool.emitter.on(PoolEvents.taskError, e => {
+ taskError = e
+ })
let inError
try {
await errorPool.execute(data)
expect(inError).toBeDefined()
expect(inError).toBeInstanceOf(Error)
expect(inError.message).toBeDefined()
- expect(typeof inError.message === 'string').toEqual(true)
+ expect(typeof inError.message === 'string').toBe(true)
+ expect(inError.message).toBe('Error Message from ThreadWorker')
+ expect(taskError).toStrictEqual({
+ message: new Error('Error Message from ThreadWorker'),
+ data
+ })
+ expect(
+ errorPool.workerNodes.some(
+ workerNode => workerNode.usage.tasks.failed === 1
+ )
+ ).toBe(true)
})
it('Verify that error handling is working properly:async', async () => {
const data = { f: 10 }
+ let taskError
+ asyncErrorPool.emitter.on(PoolEvents.taskError, e => {
+ taskError = e
+ })
let inError
try {
await asyncErrorPool.execute(data)
expect(inError).toBeDefined()
expect(inError).toBeInstanceOf(Error)
expect(inError.message).toBeDefined()
- expect(typeof inError.message === 'string').toEqual(true)
+ expect(typeof inError.message === 'string').toBe(true)
+ expect(inError.message).toBe('Error Message from ThreadWorker:async')
+ expect(taskError).toStrictEqual({
+ message: new Error('Error Message from ThreadWorker:async'),
+ data
+ })
+ expect(
+ asyncErrorPool.workerNodes.some(
+ workerNode => workerNode.usage.tasks.failed === 1
+ )
+ ).toBe(true)
})
it('Verify that async function is working properly', async () => {
const data = { f: 10 }
- const startTime = new Date().getTime()
+ const startTime = performance.now()
const result = await asyncPool.execute(data)
- const usedTime = new Date().getTime() - startTime
- expect(result).toBeTruthy()
- expect(result.f).toBe(data.f)
+ const usedTime = performance.now() - startTime
+ expect(result).toStrictEqual(data)
expect(usedTime).toBeGreaterThanOrEqual(2000)
})
it('Shutdown test', async () => {
- const exitPromise = TestUtils.waitExits(pool, numberOfThreads)
+ const exitPromise = TestUtils.waitWorkerEvents(
+ pool,
+ 'exit',
+ numberOfThreads
+ )
await pool.destroy()
- const res = await exitPromise
- expect(res).toBe(numberOfThreads)
+ const numberOfExitEvents = await exitPromise
+ expect(numberOfExitEvents).toBe(numberOfThreads)
+ })
+
+ it('Verify that thread pool options are checked', async () => {
+ const workerFilePath = './tests/worker-files/thread/testWorker.js'
+ let pool1 = new FixedThreadPool(numberOfThreads, workerFilePath)
+ expect(pool1.opts.workerOptions).toBeUndefined()
+ await pool1.destroy()
+ pool1 = new FixedThreadPool(numberOfThreads, workerFilePath, {
+ workerOptions: {
+ env: { TEST: 'test' },
+ name: 'test'
+ }
+ })
+ expect(pool1.opts.workerOptions).toStrictEqual({
+ env: { TEST: 'test' },
+ name: 'test'
+ })
+ await pool1.destroy()
})
it('Should work even without opts in input', async () => {
const pool1 = new FixedThreadPool(
- 1,
+ numberOfThreads,
'./tests/worker-files/thread/testWorker.js'
)
- const res = await pool1.execute({ test: 'test' })
- expect(res).toBeFalsy()
+ const res = await pool1.execute()
+ expect(res).toBe(false)
// We need to clean up the resources after our test
await pool1.destroy()
})
it('Verify that a pool with zero worker fails', async () => {
expect(
() => new FixedThreadPool(0, './tests/worker-files/thread/testWorker.js')
- ).toThrowError(new Error('Cannot instantiate a fixed pool with no worker'))
+ ).toThrowError('Cannot instantiate a fixed pool with no worker')
})
})