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- /**
- * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
- */
- /* globals describe, it, expect, beforeEach, bender, sinon */
- 'use strict';
- var modules = bender.amd.require( 'emitter', 'eventinfo', 'utils' );
- var emitter, listener;
- beforeEach( refreshEmitter );
- describe( 'fire', function() {
- it( 'should execute callbacks in the right order without priority', function() {
- var spy1 = sinon.spy().named( 1 );
- var spy2 = sinon.spy().named( 2 );
- var spy3 = sinon.spy().named( 3 );
- emitter.on( 'test', spy1 );
- emitter.on( 'test', spy2 );
- emitter.on( 'test', spy3 );
- emitter.fire( 'test' );
- sinon.assert.callOrder( spy1, spy2, spy3 );
- } );
- it( 'should execute callbacks in the right order with priority defined', function() {
- var spy1 = sinon.spy().named( 1 );
- var spy2 = sinon.spy().named( 2 );
- var spy3 = sinon.spy().named( 3 );
- var spy4 = sinon.spy().named( 4 );
- var spy5 = sinon.spy().named( 5 );
- emitter.on( 'test', spy2, null, 9 );
- emitter.on( 'test', spy3 ); // Defaults to 10.
- emitter.on( 'test', spy4, null, 11 );
- emitter.on( 'test', spy1, null, -1 );
- emitter.on( 'test', spy5, null, 11 );
- emitter.fire( 'test' );
- sinon.assert.callOrder( spy1, spy2, spy3, spy4, spy5 );
- } );
- it( 'should pass arguments to callbacks', function() {
- var EventInfo = modules.eventinfo;
- var spy1 = sinon.spy();
- var spy2 = sinon.spy();
- emitter.on( 'test', spy1 );
- emitter.on( 'test', spy2 );
- emitter.fire( 'test', 1, 'b', true );
- sinon.assert.calledWithExactly( spy1, sinon.match.instanceOf( EventInfo ), 1, 'b', true );
- sinon.assert.calledWithExactly( spy2, sinon.match.instanceOf( EventInfo ), 1, 'b', true );
- } );
- it( 'should pass proper context to callbacks', function() {
- var ctx1 = {};
- var ctx2 = {};
- var spy1 = sinon.spy();
- var spy2 = sinon.spy();
- var spy3 = sinon.spy();
- emitter.on( 'test', spy1, ctx1 );
- emitter.on( 'test', spy2, ctx2 );
- emitter.on( 'test', spy3 );
- emitter.fire( 'test' );
- sinon.assert.calledOn( spy1, ctx1 );
- sinon.assert.calledOn( spy2, ctx2 );
- sinon.assert.calledOn( spy3, emitter );
- } );
- it( 'should fire the right event', function() {
- var spy1 = sinon.spy();
- var spy2 = sinon.spy();
- emitter.on( '1', spy1 );
- emitter.on( '2', spy2 );
- emitter.fire( '2' );
- sinon.assert.notCalled( spy1 );
- sinon.assert.called( spy2 );
- } );
- it( 'should execute callbacks many times', function() {
- var spy = sinon.spy();
- emitter.on( 'test', spy );
- emitter.fire( 'test' );
- emitter.fire( 'test' );
- emitter.fire( 'test' );
- sinon.assert.calledThrice( spy );
- } );
- it( 'should do nothing for a non listened event', function() {
- emitter.fire( 'test' );
- } );
- it( 'should accept the same callback many times', function() {
- var spy = sinon.spy();
- emitter.on( 'test', spy );
- emitter.on( 'test', spy );
- emitter.on( 'test', spy );
- emitter.fire( 'test' );
- sinon.assert.calledThrice( spy );
- } );
- } );
- describe( 'on', function() {
- it( 'should stop()', function() {
- var spy1 = sinon.spy();
- var spy2 = sinon.spy();
- var spy3 = sinon.spy( function( event ) {
- event.stop();
- } );
- emitter.on( 'test', spy1 );
- emitter.on( 'test', spy2 );
- emitter.on( 'test', spy3 );
- emitter.on( 'test', sinon.stub().throws() );
- emitter.on( 'test', sinon.stub().throws() );
- emitter.fire( 'test' );
- sinon.assert.called( spy1 );
- sinon.assert.called( spy2 );
- sinon.assert.called( spy3 );
- } );
- it( 'should take a callback off()', function() {
- var spy1 = sinon.spy();
- var spy2 = sinon.spy( function( event ) {
- event.off();
- } );
- var spy3 = sinon.spy();
- emitter.on( 'test', spy1 );
- emitter.on( 'test', spy2 );
- emitter.on( 'test', spy3 );
- emitter.fire( 'test' );
- emitter.fire( 'test' );
- sinon.assert.calledTwice( spy1 );
- sinon.assert.calledOnce( spy2 );
- sinon.assert.calledTwice( spy3 );
- } );
- it( 'should take the callback off() even after stop()', function() {
- var spy1 = sinon.spy( function( event ) {
- event.stop();
- event.off();
- } );
- var spy2 = sinon.spy();
- emitter.on( 'test', spy1 );
- emitter.on( 'test', spy2 );
- emitter.fire( 'test' );
- emitter.fire( 'test' );
- sinon.assert.calledOnce( spy1 );
- sinon.assert.calledOnce( spy2 );
- } );
- } );
- describe( 'once', function() {
- it( 'should be called just once', function() {
- var spy1 = sinon.spy();
- var spy2 = sinon.spy();
- var spy3 = sinon.spy();
- emitter.on( 'test', spy1 );
- emitter.once( 'test', spy2 );
- emitter.on( 'test', spy3 );
- emitter.fire( 'test' );
- emitter.fire( 'test' );
- sinon.assert.calledTwice( spy1 );
- sinon.assert.calledOnce( spy2 );
- sinon.assert.calledTwice( spy3 );
- } );
- it( 'should have proper scope', function() {
- var ctx = {};
- var spy1 = sinon.spy();
- var spy2 = sinon.spy();
- emitter.once( 'test', spy1, ctx );
- emitter.once( 'test', spy2 );
- emitter.fire( 'test' );
- sinon.assert.calledOn( spy1, ctx );
- sinon.assert.calledOn( spy2, emitter );
- } );
- it( 'should have proper arguments', function() {
- var EventInfo = modules.eventinfo;
- var spy = sinon.spy();
- emitter.once( 'test', spy );
- emitter.fire( 'test', 1, 2, 3 );
- sinon.assert.calledWithExactly( spy, sinon.match.instanceOf( EventInfo ), 1, 2, 3 );
- } );
- } );
- describe( 'off', function() {
- it( 'should get callbacks off()', function() {
- var spy1 = sinon.spy();
- var spy2 = sinon.spy();
- var spy3 = sinon.spy();
- emitter.on( 'test', spy1 );
- emitter.on( 'test', spy2 );
- emitter.on( 'test', spy3 );
- emitter.fire( 'test' );
- emitter.off( 'test', spy2 );
- emitter.fire( 'test' );
- emitter.fire( 'test' );
- sinon.assert.calledThrice( spy1 );
- sinon.assert.calledOnce( spy2 );
- sinon.assert.calledThrice( spy3 );
- } );
- it( 'should not fail with unknown events', function() {
- emitter.off( 'test', function() {} );
- } );
- it( 'should remove all entries for the same callback', function() {
- var spy1 = sinon.spy().named( 1 );
- var spy2 = sinon.spy().named( 2 );
- emitter.on( 'test', spy1 );
- emitter.on( 'test', spy2 );
- emitter.on( 'test', spy1 );
- emitter.on( 'test', spy2 );
- emitter.fire( 'test' );
- emitter.off( 'test', spy1 );
- emitter.fire( 'test' );
- sinon.assert.callCount( spy1, 2 );
- sinon.assert.callCount( spy2, 4 );
- } );
- it( 'should remove the callback for a specific context only', function() {
- var spy = sinon.spy().named( 1 );
- var ctx1 = { ctx: 1 };
- var ctx2 = { ctx: 2 };
- emitter.on( 'test', spy, ctx1 );
- emitter.on( 'test', spy, ctx2 );
- emitter.fire( 'test' );
- spy.reset();
- emitter.off( 'test', spy, ctx1 );
- emitter.fire( 'test' );
- sinon.assert.calledOnce( spy );
- sinon.assert.calledOn( spy, ctx2 );
- } );
- } );
- describe( 'listenTo', function() {
- beforeEach( refreshListener );
- it( 'should properly register callbacks', function() {
- var spy = sinon.spy();
- listener.listenTo( emitter, 'test', spy );
- emitter.fire( 'test' );
- sinon.assert.called( spy );
- } );
- } );
- describe( 'stopListening', function() {
- beforeEach( refreshListener );
- it( 'should stop listening to a specific event callback', function() {
- var spy1 = sinon.spy();
- var spy2 = sinon.spy();
- listener.listenTo( emitter, 'event1', spy1 );
- listener.listenTo( emitter, 'event2', spy2 );
- emitter.fire( 'event1' );
- emitter.fire( 'event2' );
- listener.stopListening( emitter, 'event1', spy1 );
- emitter.fire( 'event1' );
- emitter.fire( 'event2' );
- sinon.assert.calledOnce( spy1 );
- sinon.assert.calledTwice( spy2 );
- } );
- it( 'should stop listening to an specific event', function() {
- var spy1a = sinon.spy();
- var spy1b = sinon.spy();
- var spy2 = sinon.spy();
- listener.listenTo( emitter, 'event1', spy1a );
- listener.listenTo( emitter, 'event1', spy1b );
- listener.listenTo( emitter, 'event2', spy2 );
- emitter.fire( 'event1' );
- emitter.fire( 'event2' );
- listener.stopListening( emitter, 'event1' );
- emitter.fire( 'event1' );
- emitter.fire( 'event2' );
- sinon.assert.calledOnce( spy1a );
- sinon.assert.calledOnce( spy1b );
- sinon.assert.calledTwice( spy2 );
- } );
- it( 'should stop listening to all events from a specific emitter', function() {
- var spy1 = sinon.spy();
- var spy2 = sinon.spy();
- listener.listenTo( emitter, 'event1', spy1 );
- listener.listenTo( emitter, 'event2', spy2 );
- emitter.fire( 'event1' );
- emitter.fire( 'event2' );
- listener.stopListening( emitter );
- emitter.fire( 'event1' );
- emitter.fire( 'event2' );
- sinon.assert.calledOnce( spy1 );
- sinon.assert.calledOnce( spy2 );
- } );
- it( 'should stop listening to everything', function() {
- var spy1 = sinon.spy();
- var spy2 = sinon.spy();
- var emitter1 = getEmitterInstance();
- var emitter2 = getEmitterInstance();
- listener.listenTo( emitter1, 'event1', spy1 );
- listener.listenTo( emitter2, 'event2', spy2 );
- expect( listener ).to.have.property( '_listeningTo' );
- emitter1.fire( 'event1' );
- emitter2.fire( 'event2' );
- listener.stopListening();
- emitter1.fire( 'event1' );
- emitter2.fire( 'event2' );
- sinon.assert.calledOnce( spy1 );
- sinon.assert.calledOnce( spy2 );
- expect( listener ).to.not.have.property( '_listeningTo' );
- } );
- it( 'should not stop other emitters when a non-listened emitter is provided', function() {
- var spy = sinon.spy();
- var emitter1 = getEmitterInstance();
- var emitter2 = getEmitterInstance();
- listener.listenTo( emitter1, 'test', spy );
- listener.stopListening( emitter2 );
- emitter1.fire( 'test' );
- sinon.assert.called( spy );
- } );
- } );
- function refreshEmitter() {
- emitter = getEmitterInstance();
- }
- function refreshListener() {
- listener = getEmitterInstance();
- }
- function getEmitterInstance() {
- var Emitter = modules.emitter;
- var utils = modules.utils;
- return utils.extend( {}, Emitter );
- }
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