tests/pools/cluster/fixed.test.js

   1 const expect = require('expect')
   2 const { FixedClusterPool } = require('../../../lib/index')
   3 const numberOfWorkers = 10
   4 const maxTasks = 500
   5 const pool = new FixedClusterPool(
   6   numberOfWorkers,
   7   './tests/worker/cluster/testWorker.js',
   8   {
   9     errorHandler: e => console.error(e)
  10   }
  11 )
  12 const emptyPool = new FixedClusterPool(
  13   1,
  14   './tests/worker/cluster/emptyWorker.js'
  15 )
  16 const echoPool = new FixedClusterPool(1, './tests/worker/cluster/echoWorker.js')
  17 const errorPool = new FixedClusterPool(
  18   1,
  19   './tests/worker/cluster/errorWorker.js',
  20   {
  21     errorHandler: e => console.error(e)
  22   }
  23 )
  24
  25 const asyncErrorPool = new FixedClusterPool(
  26   1,
  27   './tests/worker/cluster/asyncErrorWorker.js',
  28   {
  29     onlineHandler: () => console.log('worker is online')
  30   }
  31 )
  32 const asyncPool = new FixedClusterPool(
  33   1,
  34   './tests/worker/cluster/asyncWorker.js',
  35   {
  36     maxTasks: maxTasks
  37   }
  38 )
  39
  40 describe('Fixed cluster pool test suite ', () => {
  41   it('Choose worker round robin test', async () => {
  42     const results = new Set()
  43     for (let i = 0; i < numberOfWorkers; i++) {
  44       results.add(pool.chooseWorker().id)
  45     }
  46     expect(results.size).toBe(numberOfWorkers)
  47   })
  48
  49   it('Verify that the function is executed in a worker cluster', async () => {
  50     const result = await pool.execute({ test: 'test' })
  51     expect(result).toBeDefined()
  52     expect(result).toBeFalsy()
  53   })
  54
  55   it('Verify that is possible to invoke the execute method without input', async () => {
  56     const result = await pool.execute()
  57     expect(result).toBeDefined()
  58     expect(result).toBeFalsy()
  59   })
  60
  61   it('Verify that is possible to have a worker that return undefined', async () => {
  62     const result = await emptyPool.execute()
  63     expect(result).toBeFalsy()
  64   })
  65
  66   it('Verify that data are sent to the worker correctly', async () => {
  67     const data = { f: 10 }
  68     const result = await echoPool.execute(data)
  69     expect(result).toBeTruthy()
  70     expect(result.f).toBe(data.f)
  71   })
  72
  73   it('Verify that error handling is working properly:sync', async () => {
  74     const data = { f: 10 }
  75     let inError
  76     try {
  77       await errorPool.execute(data)
  78     } catch (e) {
  79       inError = e
  80     }
  81     expect(inError).toBeDefined()
  82     expect(typeof inError === 'string').toBeTruthy()
  83     expect(inError).toBe('Error Message from ClusterWorker')
  84   })
  85
  86   it('Verify that error handling is working properly:async', async () => {
  87     const data = { f: 10 }
  88     let inError
  89     try {
  90       await asyncErrorPool.execute(data)
  91     } catch (e) {
  92       inError = e
  93     }
  94     expect(inError).toBeDefined()
  95     expect(typeof inError === 'string').toBeTruthy()
  96     expect(inError).toBe('Error Message from ClusterWorker:async')
  97   })
  98
  99   it('Verify that async function is working properly', async () => {
 100     const data = { f: 10 }
 101     const startTime = new Date().getTime()
 102     const result = await asyncPool.execute(data)
 103     const usedTime = new Date().getTime() - startTime
 104     expect(result).toBeTruthy()
 105     expect(result.f).toBe(data.f)
 106     expect(usedTime).toBeGreaterThanOrEqual(2000)
 107   })
 108
 109   it('Verify that maxTasks is set properly', async () => {
 110     const worker = asyncPool.chooseWorker()
 111     expect(worker.getMaxListeners()).toBe(maxTasks)
 112   })
 113
 114   it('Shutdown test', async () => {
 115     let closedWorkers = 0
 116     pool.workers.forEach(w => {
 117       w.on('exit', () => {
 118         closedWorkers++
 119       })
 120     })
 121     await pool.destroy()
 122     await new Promise(resolve => setTimeout(resolve, 500))
 123     expect(closedWorkers).toBe(numberOfWorkers)
 124   })
 125
 126   it('Validations test', () => {
 127     let error
 128     try {
 129       const pool1 = new FixedClusterPool()
 130       console.log(pool1)
 131     } catch (e) {
 132       error = e
 133     }
 134     expect(error).toBeTruthy()
 135     expect(error.message).toBeTruthy()
 136   })
 137
 138   it('Should work even without opts in input', async () => {
 139     const pool1 = new FixedClusterPool(
 140       1,
 141       './tests/worker/cluster/testWorker.js'
 142     )
 143     const res = await pool1.execute({ test: 'test' })
 144     expect(res).toBeFalsy()
 145   })
 146 })