tests/pools/thread/fixed.test.js

   1 const expect = require('expect')
   2 const { FixedThreadPool } = require('../../../lib/index')
   3 const TestUtils = require('../../test-utils')
   4 const numberOfThreads = 10
   5 const maxTasks = 400
   6 const pool = new FixedThreadPool(
   7   numberOfThreads,
   8   './tests/worker-files/thread/testWorker.js',
   9   {
  10     errorHandler: e => console.error(e)
  11   }
  12 )
  13 const emptyPool = new FixedThreadPool(
  14   1,
  15   './tests/worker-files/thread/emptyWorker.js'
  16 )
  17 const echoPool = new FixedThreadPool(
  18   1,
  19   './tests/worker-files/thread/echoWorker.js'
  20 )
  21 const errorPool = new FixedThreadPool(
  22   1,
  23   './tests/worker-files/thread/errorWorker.js',
  24   {
  25     errorHandler: e => console.error(e),
  26     onlineHandler: () => console.log('worker is online')
  27   }
  28 )
  29 const asyncPool = new FixedThreadPool(
  30   1,
  31   './tests/worker-files/thread/asyncWorker.js',
  32   { maxTasks: maxTasks }
  33 )
  34
  35 describe('Fixed thread pool test suite', () => {
  36   after('Destroy all pools', async () => {
  37     // We need to clean up the resources after our test
  38     await echoPool.destroy()
  39     await asyncPool.destroy()
  40     await errorPool.destroy()
  41     await emptyPool.destroy()
  42   })
  43
  44   it('Choose worker round robin test', async () => {
  45     const results = new Set()
  46     for (let i = 0; i < numberOfThreads; i++) {
  47       results.add(pool.chooseWorker().threadId)
  48     }
  49     expect(results.size).toBe(numberOfThreads)
  50   })
  51
  52   it('Verify that the function is executed in a worker thread', async () => {
  53     const result = await pool.execute({ test: 'test' })
  54     expect(result).toBeDefined()
  55     expect(result).toBeFalsy()
  56   })
  57
  58   it('Verify that is possible to invoke the execute method without input', async () => {
  59     const result = await pool.execute()
  60     expect(result).toBeDefined()
  61     expect(result).toBeFalsy()
  62   })
  63
  64   it('Verify that is possible to have a worker that return undefined', async () => {
  65     const result = await emptyPool.execute()
  66     expect(result).toBeFalsy()
  67   })
  68
  69   it('Verify that data are sent to the worker correctly', async () => {
  70     const data = { f: 10 }
  71     const result = await echoPool.execute(data)
  72     expect(result).toBeTruthy()
  73     expect(result.f).toBe(data.f)
  74   })
  75
  76   it('Verify that error handling is working properly', async () => {
  77     const data = { f: 10 }
  78     let inError
  79     try {
  80       await errorPool.execute(data)
  81     } catch (e) {
  82       inError = e
  83     }
  84     expect(inError).toBeTruthy()
  85     expect(inError instanceof Error).toBeTruthy()
  86     expect(inError.message).toBeTruthy()
  87   })
  88
  89   it('Verify that async function is working properly', async () => {
  90     const data = { f: 10 }
  91     const startTime = new Date().getTime()
  92     const result = await asyncPool.execute(data)
  93     const usedTime = new Date().getTime() - startTime
  94     expect(result).toBeTruthy()
  95     expect(result.f).toBe(data.f)
  96     expect(usedTime).toBeGreaterThanOrEqual(2000)
  97   })
  98
  99   it('Verify that maxTasks is set properly', async () => {
 100     const worker = asyncPool.chooseWorker()
 101     expect(worker.port2.getMaxListeners()).toBe(maxTasks)
 102   })
 103
 104   it('Shutdown test', async () => {
 105     const exitPromise = TestUtils.waitExits(pool, numberOfThreads)
 106     await pool.destroy()
 107     const res = await exitPromise
 108     expect(res).toBe(numberOfThreads)
 109   })
 110
 111   it('Should work even without opts in input', async () => {
 112     const pool1 = new FixedThreadPool(
 113       1,
 114       './tests/worker-files/thread/testWorker.js'
 115     )
 116     const res = await pool1.execute({ test: 'test' })
 117     expect(res).toBeFalsy()
 118     // We need to clean up the resources after our test
 119     await pool1.destroy()
 120   })
 121
 122   it('Verify that a pool with zero worker fails', async () => {
 123     expect(
 124       () => new FixedThreadPool(0, './tests/worker-files/thread/testWorker.js')
 125     ).toThrowError(new Error('Cannot instantiate a fixed pool with no worker'))
 126   })
 127 })