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-files/cluster/testWorker.js',
   8   {
   9     errorHandler: e => console.error(e),
  10     onlineHandler: () => console.log('worker is online')
  11   }
  12 )
  13 const emptyPool = new FixedClusterPool(
  14   1,
  15   './tests/worker-files/cluster/emptyWorker.js'
  16 )
  17 const echoPool = new FixedClusterPool(
  18   1,
  19   './tests/worker-files/cluster/echoWorker.js'
  20 )
  21 const errorPool = new FixedClusterPool(
  22   1,
  23   './tests/worker-files/cluster/errorWorker.js',
  24   {
  25     errorHandler: e => console.error(e),
  26     onlineHandler: () => console.log('worker is online')
  27   }
  28 )
  29
  30 const asyncErrorPool = new FixedClusterPool(
  31   1,
  32   './tests/worker-files/cluster/asyncErrorWorker.js',
  33   {
  34     onlineHandler: () => console.log('worker is online')
  35   }
  36 )
  37 const asyncPool = new FixedClusterPool(
  38   1,
  39   './tests/worker-files/cluster/asyncWorker.js',
  40   {
  41     maxTasks: maxTasks
  42   }
  43 )
  44
  45 describe('Fixed cluster pool test suite ', () => {
  46   it('Choose worker round robin test', async () => {
  47     const results = new Set()
  48     for (let i = 0; i < numberOfWorkers; i++) {
  49       results.add(pool.chooseWorker().id)
  50     }
  51     expect(results.size).toBe(numberOfWorkers)
  52   })
  53
  54   it('Verify that the function is executed in a worker cluster', async () => {
  55     const result = await pool.execute({ test: 'test' })
  56     expect(result).toBeDefined()
  57     expect(result).toBeFalsy()
  58   })
  59
  60   it('Verify that is possible to invoke the execute method without input', async () => {
  61     const result = await pool.execute()
  62     expect(result).toBeDefined()
  63     expect(result).toBeFalsy()
  64   })
  65
  66   it('Verify that is possible to have a worker that return undefined', async () => {
  67     const result = await emptyPool.execute()
  68     expect(result).toBeFalsy()
  69   })
  70
  71   it('Verify that data are sent to the worker correctly', async () => {
  72     const data = { f: 10 }
  73     const result = await echoPool.execute(data)
  74     expect(result).toBeTruthy()
  75     expect(result.f).toBe(data.f)
  76   })
  77
  78   it('Verify that error handling is working properly:sync', async () => {
  79     const data = { f: 10 }
  80     let inError
  81     try {
  82       await errorPool.execute(data)
  83     } catch (e) {
  84       inError = e
  85     }
  86     expect(inError).toBeDefined()
  87     expect(typeof inError === 'string').toBeTruthy()
  88     expect(inError).toBe('Error Message from ClusterWorker')
  89   })
  90
  91   it('Verify that error handling is working properly:async', async () => {
  92     const data = { f: 10 }
  93     let inError
  94     try {
  95       await asyncErrorPool.execute(data)
  96     } catch (e) {
  97       inError = e
  98     }
  99     expect(inError).toBeDefined()
 100     expect(typeof inError === 'string').toBeTruthy()
 101     expect(inError).toBe('Error Message from ClusterWorker:async')
 102   })
 103
 104   it('Verify that async function is working properly', async () => {
 105     const data = { f: 10 }
 106     const startTime = new Date().getTime()
 107     const result = await asyncPool.execute(data)
 108     const usedTime = new Date().getTime() - startTime
 109     expect(result).toBeTruthy()
 110     expect(result.f).toBe(data.f)
 111     expect(usedTime).toBeGreaterThanOrEqual(2000)
 112   })
 113
 114   it('Verify that maxTasks is set properly', async () => {
 115     const worker = asyncPool.chooseWorker()
 116     expect(worker.getMaxListeners()).toBe(maxTasks)
 117   })
 118
 119   it('Shutdown test', async () => {
 120     let closedWorkers = 0
 121     pool.workers.forEach(w => {
 122       w.on('exit', () => {
 123         closedWorkers++
 124       })
 125     })
 126     await pool.destroy()
 127     await new Promise(resolve => setTimeout(resolve, 200))
 128     expect(closedWorkers).toBe(numberOfWorkers)
 129   })
 130
 131   it('Validations test', () => {
 132     let error
 133     try {
 134       const pool1 = new FixedClusterPool()
 135       console.log(pool1)
 136     } catch (e) {
 137       error = e
 138     }
 139     expect(error).toBeTruthy()
 140     expect(error.message).toBeTruthy()
 141   })
 142
 143   it('Should work even without opts in input', async () => {
 144     const pool1 = new FixedClusterPool(
 145       1,
 146       './tests/worker-files/cluster/testWorker.js'
 147     )
 148     const res = await pool1.execute({ test: 'test' })
 149     expect(res).toBeFalsy()
 150   })
 151 })