overleaf/services/spelling/test/unit/js/ASpellWorkerTests.js

/* eslint-disable
    handle-callback-err,
    no-undef
*/
const sinon = require('sinon')
const chai = require('chai')
const { expect } = chai
const SandboxedModule = require('sandboxed-module')
const EventEmitter = require('events')

describe('ASpellWorker', function () {
  beforeEach(function () {
    this.child_process = {}
    return (this.ASpellWorker = SandboxedModule.require('../../../app/js/ASpellWorker', {
      requires: {
        'logger-sharelatex': {
          log() { },
          info() { },
          err() { }
        },
        'metrics-sharelatex': {
          gauge() { },
          inc() { }
        },
        'child_process': this.child_process
      }
    }))
  })

  describe("creating a worker", function () {
    beforeEach(function () {
      this.pipe = {
        'stdout': new EventEmitter(),
        'stderr': { on: sinon.stub() },
        'stdin': {on: sinon.stub() },
        'on': sinon.stub(),
        'pid': 12345
      }
      this.child_process.spawn = sinon.stub().returns(this.pipe)
      this.pipe.stdout.setEncoding = sinon.stub()
      worker = new this.ASpellWorker('en')

    })

    describe("with normal aspell output", function () {
      beforeEach(function () {
        this.callback = worker.callback = sinon.stub()
        this.pipe.stdout.emit('data', '& hello\n')
        this.pipe.stdout.emit('data', '& world\n')
        this.pipe.stdout.emit('data', 'en\n')
        this.pipe.stdout.emit('data', '& goodbye')
      })

      it('should call the callback', function() {
        expect(this.callback.called).to.equal(true)
        expect(this.callback.calledWith(null, "& hello\n& world\nen\n")).to.equal(true)
      })
    })

    describe("with the aspell end marker split across chunks", function () {
      beforeEach(function () {
        this.callback = worker.callback = sinon.stub()
        this.pipe.stdout.emit('data', '& hello\n')
        this.pipe.stdout.emit('data', '& world\ne')
        this.pipe.stdout.emit('data', 'n\n')
        this.pipe.stdout.emit('data', '& goodbye')
      })

      it('should call the callback', function() {
        expect(this.callback.called).to.equal(true)
        expect(this.callback.calledWith(null, "& hello\n& world\nen\n")).to.equal(true)
      })
    })

    describe("with the aspell end marker newline split across chunks", function () {
      beforeEach(function () {
        this.callback = worker.callback = sinon.stub()
        this.pipe.stdout.emit('data', '& hello\n')
        this.pipe.stdout.emit('data', '& world\n')
        this.pipe.stdout.emit('data', 'en')
        this.pipe.stdout.emit('data', '\n& goodbye')
      })

      it('should call the callback', function() {
        expect(this.callback.called).to.equal(true)
        expect(this.callback.calledWith(null, "& hello\n& world\nen")).to.equal(true)
      })
    })

    describe("with everything split across chunks", function () {
      beforeEach(function () {
        this.callback = worker.callback = sinon.stub()
        '& hello\n& world\nen\n& goodbye'.split('').forEach(x => {
          this.pipe.stdout.emit('data', x)
        })
      })

      it('should call the callback', function() {
        expect(this.callback.called).to.equal(true)
        expect(this.callback.calledWith(null, "& hello\n& world\nen")).to.equal(true)
      })
    })

  })
})