Merge pull request #29 from pioardi/dependabot/npm_and_yarn/standard-14.3.4

[poolifier.git] / tests / fixed.test.js

const expect = require('expect')
const FixedThreadPool = require('../lib/fixed')
const numThreads = 10
const pool = new FixedThreadPool(numThreads,
  './tests/workers/testWorker.js',
  { errorHandler: (e) => console.error(e), onlineHandler: () => console.log('worker is online') })
const emptyPool = new FixedThreadPool(1, './tests/workers/emptyWorker.js')
const echoPool = new FixedThreadPool(1, './tests/workers/echoWorker.js')
const errorPool = new FixedThreadPool(1, './tests/workers/errorWorker.js', { errorHandler: (e) => console.error(e), onlineHandler: () => console.log('worker is online') })

describe('Fixed thread pool test suite ', () => {
  it('Choose worker round robin test', async () => {
    const results = new Set()
    for (let i = 0; i < numThreads; i++) {
      results.add(pool._chooseWorker().threadId)
    }
    expect(results.size).toBe(numThreads)
  })

  it('Verify that the function is executed in a worker thread', async () => {
    const result = await pool.execute({ test: 'test' })
    expect(result).toBeDefined()
    expect(result).toBeFalsy()
  })

  it('Verify that is possible to invoke the execute method without input', async () => {
    const result = await pool.execute()
    expect(result).toBeDefined()
    expect(result).toBeFalsy()
  })

  it('Verify that is possible to have a worker that return undefined', async () => {
    const result = await emptyPool.execute()
    expect(result).toBeFalsy()
  })

  it('Verify that data are sent to the worker correctly', async () => {
    const data = { f: 10 }
    const result = await echoPool.execute(data)
    expect(result).toBeTruthy()
    expect(result.f).toBe(data.f)
  })

  it('Verify that error handling is working properly', async () => {
    const data = { f: 10 }
    let inError
    try {
      await errorPool.execute(data)
    } catch (e) {
      inError = e
    }
    expect(inError).toBeTruthy()
    expect(inError instanceof Error).toBeTruthy()
    expect(inError.message).toBeTruthy()
  })

  it('Shutdown test', async () => {
    let closedThreads = 0
    pool.workers.forEach(w => {
      w.on('exit', () => {
        closedThreads++
      })
    })
    await pool.destroy()
    expect(closedThreads).toBe(numThreads)
  })

  it('Validations test', () => {
    let error
    try {
      const pool1 = new FixedThreadPool()
      console.log(pool1)
    } catch (e) {
      error = e
    }
    expect(error).toBeTruthy()
    expect(error.message).toBeTruthy()
  })

  it('Should work even without opts in input', async () => {
    const pool1 = new FixedThreadPool(1, './tests/workers/testWorker.js')
    const res = await pool1.execute({ test: 'test' })
    expect(res).toBeFalsy()
  })
})