domeventobserver.js 3.7 KB

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  1. /**
  2. * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
  3. * For licensing, see LICENSE.md.
  4. */
  5. /* bender-tags: treeview */
  6. 'use strict';
  7. import DomEventObserver from '/ckeditor5/engine/treeview/observer/domeventobserver.js';
  8. import Observer from '/ckeditor5/engine/treeview/observer/observer.js';
  9. import TreeView from '/ckeditor5/engine/treeview/treeview.js';
  10. class ClickObserver extends DomEventObserver {
  11. constructor( treeView ) {
  12. super( treeView );
  13. this.domEventType = 'click';
  14. }
  15. onDomEvent( domEvt ) {
  16. this.fire( 'click', 'foo', domEvt );
  17. }
  18. }
  19. class MultiObserver extends DomEventObserver {
  20. constructor( treeView ) {
  21. super( treeView );
  22. this.domEventType = [ 'evt1', 'evt2' ];
  23. }
  24. onDomEvent( domEvt ) {
  25. this.fire( domEvt.type );
  26. }
  27. }
  28. describe( 'DomEventObserver', () => {
  29. let treeView;
  30. beforeEach( () => {
  31. treeView = new TreeView();
  32. } );
  33. describe( 'constructor', () => {
  34. it( 'should create Observer with properties', () => {
  35. const observer = new DomEventObserver( treeView );
  36. expect( observer ).to.be.an.instanceof( Observer );
  37. } );
  38. } );
  39. it( 'should add event listener', () => {
  40. const domElement = document.createElement( 'p' );
  41. const domEvent = new MouseEvent( 'click' );
  42. const evtSpy = sinon.spy();
  43. treeView.createRoot( domElement, 'root' );
  44. treeView.addObserver( ClickObserver );
  45. treeView.on( 'click', evtSpy );
  46. domElement.dispatchEvent( domEvent );
  47. expect( evtSpy.calledOnce ).to.be.true;
  48. expect( evtSpy.args[ 0 ][ 1 ] ).to.equal( 'foo' );
  49. expect( evtSpy.args[ 0 ][ 2 ] ).to.equal( domEvent );
  50. } );
  51. it( 'should add multiple event listeners', () => {
  52. const domElement = document.createElement( 'p' );
  53. const domEvent1 = new MouseEvent( 'evt1' );
  54. const domEvent2 = new MouseEvent( 'evt2' );
  55. const evtSpy1 = sinon.spy();
  56. const evtSpy2 = sinon.spy();
  57. treeView.createRoot( domElement, 'root' );
  58. treeView.addObserver( MultiObserver );
  59. treeView.on( 'evt1', evtSpy1 );
  60. treeView.on( 'evt2', evtSpy2 );
  61. domElement.dispatchEvent( domEvent1 );
  62. expect( evtSpy1.calledOnce ).to.be.true;
  63. domElement.dispatchEvent( domEvent2 );
  64. expect( evtSpy2.calledOnce ).to.be.true;
  65. } );
  66. it( 'should not fire event if observer is disabled', () => {
  67. const domElement = document.createElement( 'p' );
  68. const domEvent = new MouseEvent( 'click' );
  69. const evtSpy = sinon.spy();
  70. treeView.createRoot( domElement, 'root' );
  71. treeView.addObserver( ClickObserver );
  72. treeView.on( 'click', evtSpy );
  73. const testObserver = Array.from( treeView._observers )[ 0 ];
  74. testObserver.disable();
  75. domElement.dispatchEvent( domEvent );
  76. expect( evtSpy.called ).to.be.false;
  77. } );
  78. it( 'should fire event if observer is disabled and re-enabled', () => {
  79. const domElement = document.createElement( 'p' );
  80. const domEvent = new MouseEvent( 'click' );
  81. const treeView = new TreeView();
  82. const evtSpy = sinon.spy();
  83. treeView.createRoot( domElement, 'root' );
  84. treeView.addObserver( ClickObserver );
  85. treeView.on( 'click', evtSpy );
  86. const testObserver = Array.from( treeView._observers )[ 0 ];
  87. testObserver.disable();
  88. domElement.dispatchEvent( domEvent );
  89. expect( evtSpy.called ).to.be.false;
  90. testObserver.enable();
  91. domElement.dispatchEvent( domEvent );
  92. expect( evtSpy.calledOnce ).to.be.true;
  93. } );
  94. describe( 'fire', () => {
  95. it( 'should do nothing if observer is disabled', () => {
  96. const testObserver = new ClickObserver( treeView );
  97. const fireSpy = sinon.spy( treeView, 'fire' );
  98. testObserver.disable();
  99. testObserver.fire( 'click' );
  100. expect( fireSpy.called ).to.be.false;
  101. testObserver.enable();
  102. testObserver.fire( 'click' );
  103. expect( fireSpy.calledOnce ).to.be.true;
  104. } );
  105. } );
  106. } );