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   }
  11 )
  12 const emptyPool = new FixedClusterPool(
  13   1,
  14   './tests/worker-files/cluster/emptyWorker.js'
  15 )
  16 const echoPool = new FixedClusterPool(
  17   1,
  18   './tests/worker-files/cluster/echoWorker.js'
  19 )
  20 const errorPool = new FixedClusterPool(
  21   1,
  22   './tests/worker-files/cluster/errorWorker.js',
  23   {
  24     errorHandler: e => console.error(e)
  25   }
  26 )
  27
  28 const asyncErrorPool = new FixedClusterPool(
  29   1,
  30   './tests/worker-files/cluster/asyncErrorWorker.js',
  31   {
  32     onlineHandler: () => console.log('worker is online')
  33   }
  34 )
  35 const asyncPool = new FixedClusterPool(
  36   1,
  37   './tests/worker-files/cluster/asyncWorker.js',
  38   {
  39     maxTasks: maxTasks
  40   }
  41 )
  42
  43 describe('Fixed cluster pool test suite ', () => {
  44   it('Choose worker round robin test', async () => {
  45     const results = new Set()
  46     for (let i = 0; i < numberOfWorkers; i++) {
  47       results.add(pool.chooseWorker().id)
  48     }
  49     expect(results.size).toBe(numberOfWorkers)
  50   })
  51
  52   it('Verify that the function is executed in a worker cluster', 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:sync', 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).toBeDefined()
  85     expect(typeof inError === 'string').toBeTruthy()
  86     expect(inError).toBe('Error Message from ClusterWorker')
  87   })
  88
  89   it('Verify that error handling is working properly:async', async () => {
  90     const data = { f: 10 }
  91     let inError
  92     try {
  93       await asyncErrorPool.execute(data)
  94     } catch (e) {
  95       inError = e
  96     }
  97     expect(inError).toBeDefined()
  98     expect(typeof inError === 'string').toBeTruthy()
  99     expect(inError).toBe('Error Message from ClusterWorker:async')
 100   })
 101
 102   it('Verify that async function is working properly', async () => {
 103     const data = { f: 10 }
 104     const startTime = new Date().getTime()
 105     const result = await asyncPool.execute(data)
 106     const usedTime = new Date().getTime() - startTime
 107     expect(result).toBeTruthy()
 108     expect(result.f).toBe(data.f)
 109     expect(usedTime).toBeGreaterThanOrEqual(2000)
 110   })
 111
 112   it('Verify that maxTasks is set properly', async () => {
 113     const worker = asyncPool.chooseWorker()
 114     expect(worker.getMaxListeners()).toBe(maxTasks)
 115   })
 116
 117   it('Shutdown test', async () => {
 118     let closedWorkers = 0
 119     pool.workers.forEach(w => {
 120       w.on('exit', () => {
 121         closedWorkers++
 122       })
 123     })
 124     await pool.destroy()
 125     await new Promise(resolve => setTimeout(resolve, 500))
 126     expect(closedWorkers).toBe(numberOfWorkers)
 127   })
 128
 129   it('Validations test', () => {
 130     let error
 131     try {
 132       const pool1 = new FixedClusterPool()
 133       console.log(pool1)
 134     } catch (e) {
 135       error = e
 136     }
 137     expect(error).toBeTruthy()
 138     expect(error.message).toBeTruthy()
 139   })
 140
 141   it('Should work even without opts in input', async () => {
 142     const pool1 = new FixedClusterPool(
 143       1,
 144       './tests/worker-files/cluster/testWorker.js'
 145     )
 146     const res = await pool1.execute({ test: 'test' })
 147     expect(res).toBeFalsy()
 148   })
 149 })