1 const { expect
} = require('expect')
2 const { FixedThreadPool
} = require('../../../lib/index')
3 const TestUtils
= require('../../test-utils')
4 const numberOfThreads
= 10
5 const pool
= new FixedThreadPool(
7 './tests/worker-files/thread/testWorker.js',
9 errorHandler
: e
=> console
.error(e
)
12 const emptyPool
= new FixedThreadPool(
14 './tests/worker-files/thread/emptyWorker.js',
15 { exitHandler
: () => console
.log('empty pool worker exited') }
17 const echoPool
= new FixedThreadPool(
19 './tests/worker-files/thread/echoWorker.js'
21 const errorPool
= new FixedThreadPool(
23 './tests/worker-files/thread/errorWorker.js',
25 errorHandler
: e
=> console
.error(e
)
28 const asyncErrorPool
= new FixedThreadPool(
30 './tests/worker-files/thread/asyncErrorWorker.js',
32 errorHandler
: e
=> console
.error(e
)
35 const asyncPool
= new FixedThreadPool(
37 './tests/worker-files/thread/asyncWorker.js'
40 describe('Fixed thread pool test suite', () => {
41 after('Destroy all pools', async () => {
42 // We need to clean up the resources after our test
43 await echoPool
.destroy()
44 await asyncPool
.destroy()
45 await errorPool
.destroy()
46 await asyncErrorPool
.destroy()
47 await emptyPool
.destroy()
50 it('Choose worker round robin test', async () => {
51 const results
= new Set()
52 for (let i
= 0; i
< numberOfThreads
; i
++) {
53 results
.add(pool
.chooseWorker().threadId
)
55 expect(results
.size
).toBe(numberOfThreads
)
58 it('Verify that the function is executed in a worker thread', async () => {
59 const result
= await pool
.execute({ test
: 'test' })
60 expect(result
).toBeDefined()
61 expect(result
).toBeFalsy()
64 it('Verify that is possible to invoke the execute method without input', async () => {
65 const result
= await pool
.execute()
66 expect(result
).toBeDefined()
67 expect(result
).toBeFalsy()
70 it('Verify that busy event is emitted', async () => {
73 pool
.emitter
.on('busy', () => poolBusy
++)
74 for (let i
= 0; i
< numberOfThreads
* 2; i
++) {
75 promises
.push(pool
.execute({ test
: 'test' }))
77 // The `busy` event is triggered when the number of submitted tasks at once reach the number of fixed pool workers.
78 // So in total numberOfThreads + 1 times for a loop submitting up to numberOfThreads * 2 tasks to the fixed pool.
79 expect(poolBusy
).toBe(numberOfThreads
+ 1)
82 it('Verify that is possible to have a worker that return undefined', async () => {
83 const result
= await emptyPool
.execute()
84 expect(result
).toBeFalsy()
87 it('Verify that data are sent to the worker correctly', async () => {
88 const data
= { f
: 10 }
89 const result
= await echoPool
.execute(data
)
90 expect(result
).toBeTruthy()
91 expect(result
.f
).toBe(data
.f
)
94 it('Verify that error handling is working properly:sync', async () => {
95 const data
= { f
: 10 }
98 await errorPool
.execute(data
)
102 expect(inError
).toBeDefined()
103 expect(inError
).toBeInstanceOf(Error
)
104 expect(inError
.message
).toBeDefined()
105 expect(typeof inError
.message
=== 'string').toBe(true)
106 expect(inError
.message
).toBe('Error Message from ThreadWorker')
109 it('Verify that error handling is working properly:async', async () => {
110 const data
= { f
: 10 }
113 await asyncErrorPool
.execute(data
)
117 expect(inError
).toBeDefined()
118 expect(inError
).toBeInstanceOf(Error
)
119 expect(inError
.message
).toBeDefined()
120 expect(typeof inError
.message
=== 'string').toBe(true)
121 expect(inError
.message
).toBe('Error Message from ThreadWorker:async')
124 it('Verify that async function is working properly', async () => {
125 const data
= { f
: 10 }
126 const startTime
= new Date().getTime()
127 const result
= await asyncPool
.execute(data
)
128 const usedTime
= new Date().getTime() - startTime
129 expect(result
).toBeTruthy()
130 expect(result
.f
).toBe(data
.f
)
131 expect(usedTime
).toBeGreaterThanOrEqual(2000)
134 it('Shutdown test', async () => {
135 const exitPromise
= TestUtils
.waitExits(pool
, numberOfThreads
)
137 const numberOfExitEvents
= await exitPromise
138 expect(numberOfExitEvents
).toBe(numberOfThreads
)
141 it('Should work even without opts in input', async () => {
142 const pool1
= new FixedThreadPool(
144 './tests/worker-files/thread/testWorker.js'
146 const res
= await pool1
.execute({ test
: 'test' })
147 expect(res
).toBeFalsy()
148 // We need to clean up the resources after our test
149 await pool1
.destroy()
152 it('Verify that a pool with zero worker fails', async () => {
154 () => new FixedThreadPool(0, './tests/worker-files/thread/testWorker.js')
155 ).toThrowError(new Error('Cannot instantiate a fixed pool with no worker'))