overleaf/services/web/test/frontend/utils/EventEmitterTests.js

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/* eslint-disable
max-len,
no-return-assign,
*/
// TODO: This file was created by bulk-decaffeinate.
// Fix any style issues and re-enable lint.
/*
* decaffeinate suggestions:
* DS102: Remove unnecessary code created because of implicit returns
* Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
*/
import { expect } from 'chai'
import sinon from 'sinon'
import EventEmitter from '../../../frontend/js/utils/EventEmitter'
export default describe('EventEmitter', function () {
beforeEach(function () {
return (this.eventEmitter = new EventEmitter())
})
it('calls listeners', function () {
const cb1 = sinon.stub()
const cb2 = sinon.stub()
this.eventEmitter.on('foo', cb1)
this.eventEmitter.on('bar', cb2)
this.eventEmitter.trigger('foo')
expect(cb1).to.have.been.called
return expect(cb2).to.not.have.been.called
})
it('calls multiple listeners', function () {
const cb1 = sinon.stub()
const cb2 = sinon.stub()
this.eventEmitter.on('foo', cb1)
this.eventEmitter.on('foo', cb2)
this.eventEmitter.trigger('foo')
expect(cb1).to.have.been.called
return expect(cb2).to.have.been.called
})
it('calls listeners with namespace', function () {
const cb1 = sinon.stub()
const cb2 = sinon.stub()
this.eventEmitter.on('foo', cb1)
this.eventEmitter.on('foo.bar', cb2)
this.eventEmitter.trigger('foo')
expect(cb1).to.have.been.called
return expect(cb2).to.have.been.called
})
it('removes listeners', function () {
const cb = sinon.stub()
this.eventEmitter.on('foo', cb)
this.eventEmitter.off('foo')
this.eventEmitter.trigger('foo')
return expect(cb).to.not.have.been.called
})
it('removes namespaced listeners', function () {
const cb = sinon.stub()
this.eventEmitter.on('foo.bar', cb)
this.eventEmitter.off('foo.bar')
this.eventEmitter.trigger('foo')
return expect(cb).to.not.have.been.called
})
it('does not remove unnamespaced listeners if off called with namespace', function () {
const cb1 = sinon.stub()
const cb2 = sinon.stub()
this.eventEmitter.on('foo', cb1)
this.eventEmitter.on('foo.bar', cb2)
this.eventEmitter.off('foo.bar')
this.eventEmitter.trigger('foo')
expect(cb1).to.have.been.called
return expect(cb2).to.not.have.been.called
})
})