tests/pools/cluster/fixed.test.js

   1 const expect = require('expect')
   2 const { FixedClusterPool } = require('../../../lib/index')
   3 const numWorkers = 10
   4 const pool = new FixedClusterPool(
   5   numWorkers,
   6   './tests/worker/cluster/testWorker.js',
   7   {
   8     errorHandler: e => console.error(e),
   9     onlineHandler: () => console.log('worker is online')
  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     onlineHandler: () => console.log('worker is online')
  23   }
  24 )
  25
  26 const asyncErrorPool = new FixedClusterPool(
  27   1,
  28   './tests/worker/cluster/asyncErrorWorker.js',
  29   {
  30     errorHandler: e => console.error(e),
  31     onlineHandler: () => console.log('worker is online')
  32   }
  33 )
  34 const asyncPool = new FixedClusterPool(
  35   1,
  36   './tests/worker/cluster/asyncWorker.js'
  37 )
  38
  39 describe('Fixed cluster pool test suite ', () => {
  40   it('Choose worker round robin test', async () => {
  41     const results = new Set()
  42     for (let i = 0; i < numWorkers; i++) {
  43       results.add(pool.chooseWorker().id)
  44     }
  45     expect(results.size).toBe(numWorkers)
  46   })
  47
  48   it('Verify that the function is executed in a worker cluster', async () => {
  49     const result = await pool.execute({ test: 'test' })
  50     expect(result).toBeDefined()
  51     expect(result).toBeFalsy()
  52   })
  53
  54   it('Verify that is possible to invoke the execute method without input', async () => {
  55     const result = await pool.execute()
  56     expect(result).toBeDefined()
  57     expect(result).toBeFalsy()
  58   })
  59
  60   it('Verify that is possible to have a worker that return undefined', async () => {
  61     const result = await emptyPool.execute()
  62     expect(result).toBeFalsy()
  63   })
  64
  65   it('Verify that data are sent to the worker correctly', async () => {
  66     const data = { f: 10 }
  67     const result = await echoPool.execute(data)
  68     expect(result).toBeTruthy()
  69     expect(result.f).toBe(data.f)
  70   })
  71
  72   it('Verify that error handling is working properly:sync', async () => {
  73     const data = { f: 10 }
  74     let inError
  75     try {
  76       await errorPool.execute(data)
  77     } catch (e) {
  78       inError = e
  79     }
  80     expect(inError).toBeDefined()
  81     expect(typeof inError === 'string').toBeTruthy()
  82     expect(inError).toBe('Error Message from ClusterWorker')
  83   })
  84
  85   it('Verify that error handling is working properly:async', async () => {
  86     const data = { f: 10 }
  87     let inError
  88     try {
  89       await asyncErrorPool.execute(data)
  90     } catch (e) {
  91       inError = e
  92     }
  93     expect(inError).toBeDefined()
  94     expect(typeof inError === 'string').toBeTruthy()
  95     expect(inError).toBe('Error Message from ClusterWorker:async')
  96   })
  97
  98   it('Verify that async function is working properly', async () => {
  99     const data = { f: 10 }
 100     const startTime = new Date().getTime()
 101     const result = await asyncPool.execute(data)
 102     const usedTime = new Date().getTime() - startTime
 103     expect(result).toBeTruthy()
 104     expect(result.f).toBe(data.f)
 105     expect(usedTime).toBeGreaterThanOrEqual(2000)
 106   })
 107
 108   it('Shutdown test', async () => {
 109     let closedWorkers = 0
 110     pool.workers.forEach(w => {
 111       w.on('exit', () => {
 112         closedWorkers++
 113       })
 114     })
 115     pool.destroy()
 116     await new Promise(resolve => setTimeout(resolve, 200))
 117     expect(closedWorkers).toBe(numWorkers)
 118   })
 119
 120   it('Validations test', () => {
 121     let error
 122     try {
 123       const pool1 = new FixedClusterPool()
 124       console.log(pool1)
 125     } catch (e) {
 126       error = e
 127     }
 128     expect(error).toBeTruthy()
 129     expect(error.message).toBeTruthy()
 130   })
 131
 132   it('Should work even without opts in input', async () => {
 133     const pool1 = new FixedClusterPool(
 134       1,
 135       './tests/worker/cluster/testWorker.js'
 136     )
 137     const res = await pool1.execute({ test: 'test' })
 138     expect(res).toBeFalsy()
 139   })
 140 })