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view.js 24 KB

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  1. /**
  2. * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.
  3. * For licensing, see LICENSE.md.
  4. */
  5. /* globals document */
  6. import View from '../../../src/view/view';
  7. import Observer from '../../../src/view/observer/observer';
  8. import MutationObserver from '../../../src/view/observer/mutationobserver';
  9. import KeyObserver from '../../../src/view/observer/keyobserver';
  10. import FakeSelectionObserver from '../../../src/view/observer/fakeselectionobserver';
  11. import SelectionObserver from '../../../src/view/observer/selectionobserver';
  12. import FocusObserver from '../../../src/view/observer/focusobserver';
  13. import CompositionObserver from '../../../src/view/observer/compositionobserver';
  14. import ViewRange from '../../../src/view/range';
  15. import ViewElement from '../../../src/view/element';
  16. import ViewPosition from '../../../src/view/position';
  17. import ViewSelection from '../../../src/view/selection';
  18. import { isBlockFiller, BR_FILLER } from '../../../src/view/filler';
  19. import CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';
  20. import log from '@ckeditor/ckeditor5-utils/src/log';
  21. import count from '@ckeditor/ckeditor5-utils/src/count';
  22. import global from '@ckeditor/ckeditor5-utils/src/dom/global';
  23. import createViewRoot from '../_utils/createroot';
  24. import createElement from '@ckeditor/ckeditor5-utils/src/dom/createelement';
  25. import testUtils from '@ckeditor/ckeditor5-core/tests/_utils/utils';
  26. describe( 'view', () => {
  27. const DEFAULT_OBSERVERS_COUNT = 6;
  28. let domRoot, view, viewDocument, ObserverMock, instantiated, enabled, ObserverMockGlobalCount;
  29. testUtils.createSinonSandbox();
  30. beforeEach( () => {
  31. domRoot = createElement( document, 'div', {
  32. id: 'editor',
  33. contenteditable: 'true'
  34. } );
  35. document.body.appendChild( domRoot );
  36. view = new View();
  37. viewDocument = view.document;
  38. ObserverMock = class extends Observer {
  39. constructor( view ) {
  40. super( view );
  41. this.enable = sinon.spy();
  42. this.disable = sinon.spy();
  43. this.observe = sinon.spy();
  44. this.destroy = sinon.spy();
  45. }
  46. };
  47. instantiated = 0;
  48. enabled = 0;
  49. ObserverMockGlobalCount = class extends Observer {
  50. constructor( view ) {
  51. super( view );
  52. instantiated++;
  53. this.observe = sinon.spy();
  54. }
  55. enable() {
  56. enabled++;
  57. }
  58. };
  59. } );
  60. afterEach( () => {
  61. domRoot.remove();
  62. view.destroy();
  63. } );
  64. it( 'should add default observers', () => {
  65. expect( count( view._observers ) ).to.equal( DEFAULT_OBSERVERS_COUNT );
  66. expect( view.getObserver( MutationObserver ) ).to.be.instanceof( MutationObserver );
  67. expect( view.getObserver( SelectionObserver ) ).to.be.instanceof( SelectionObserver );
  68. expect( view.getObserver( FocusObserver ) ).to.be.instanceof( FocusObserver );
  69. expect( view.getObserver( KeyObserver ) ).to.be.instanceof( KeyObserver );
  70. expect( view.getObserver( FakeSelectionObserver ) ).to.be.instanceof( FakeSelectionObserver );
  71. expect( view.getObserver( CompositionObserver ) ).to.be.instanceof( CompositionObserver );
  72. } );
  73. describe( 'attachDomRoot()', () => {
  74. it( 'should attach DOM element to main view element', () => {
  75. const domDiv = document.createElement( 'div' );
  76. const viewRoot = createViewRoot( viewDocument, 'div', 'main' );
  77. expect( count( view.domRoots ) ).to.equal( 0 );
  78. view.attachDomRoot( domDiv );
  79. expect( count( view.domRoots ) ).to.equal( 1 );
  80. expect( view.getDomRoot() ).to.equal( domDiv );
  81. expect( view.domConverter.mapViewToDom( viewRoot ) ).to.equal( domDiv );
  82. expect( view._renderer.markedChildren.has( viewRoot ) ).to.be.true;
  83. domDiv.remove();
  84. } );
  85. it( 'should attach DOM element to custom view element', () => {
  86. const domH1 = document.createElement( 'h1' );
  87. const viewH1 = createViewRoot( viewDocument, 'h1', 'header' );
  88. expect( count( view.domRoots ) ).to.equal( 0 );
  89. view.attachDomRoot( domH1, 'header' );
  90. expect( count( view.domRoots ) ).to.equal( 1 );
  91. expect( view.getDomRoot( 'header' ) ).to.equal( domH1 );
  92. expect( view.domConverter.mapViewToDom( viewH1 ) ).to.equal( domH1 );
  93. expect( view._renderer.markedChildren.has( viewH1 ) ).to.be.true;
  94. } );
  95. it( 'should handle the "contenteditable" attribute management on #isReadOnly change', () => {
  96. const domDiv = document.createElement( 'div' );
  97. const viewRoot = createViewRoot( viewDocument, 'div', 'main' );
  98. view.attachDomRoot( domDiv );
  99. viewRoot.isReadOnly = false;
  100. expect( viewRoot.getAttribute( 'contenteditable' ) ).to.equal( 'true' );
  101. viewRoot.isReadOnly = true;
  102. expect( viewRoot.getAttribute( 'contenteditable' ) ).to.equal( 'false' );
  103. } );
  104. it( 'should call observe on each observer', () => {
  105. // The variable will be overwritten.
  106. view.destroy();
  107. view = new View();
  108. viewDocument = view.document;
  109. view._renderer.render = sinon.spy();
  110. const domDiv1 = document.createElement( 'div' );
  111. domDiv1.setAttribute( 'id', 'editor' );
  112. const domDiv2 = document.createElement( 'div' );
  113. domDiv2.setAttribute( 'id', 'editor' );
  114. const observerMock = view.addObserver( ObserverMock );
  115. const observerMockGlobalCount = view.addObserver( ObserverMockGlobalCount );
  116. createViewRoot( viewDocument, 'div', 'root1' );
  117. view.attachDomRoot( document.createElement( 'div' ), 'root1' );
  118. sinon.assert.calledOnce( observerMock.observe );
  119. sinon.assert.calledOnce( observerMockGlobalCount.observe );
  120. } );
  121. } );
  122. describe( 'detachDomRoot()', () => {
  123. it( 'should remove DOM root and unbind DOM element', () => {
  124. const domDiv = document.createElement( 'div' );
  125. const viewRoot = createViewRoot( viewDocument, 'div', 'main' );
  126. view.attachDomRoot( domDiv );
  127. expect( count( view.domRoots ) ).to.equal( 1 );
  128. expect( view.domConverter.mapViewToDom( viewRoot ) ).to.equal( domDiv );
  129. view.detachDomRoot( 'main' );
  130. expect( count( view.domRoots ) ).to.equal( 0 );
  131. expect( view.domConverter.mapViewToDom( viewRoot ) ).to.be.undefined;
  132. domDiv.remove();
  133. } );
  134. it( 'should restore the DOM root attributes to the state before attachDomRoot()', () => {
  135. const domDiv = document.createElement( 'div' );
  136. const viewRoot = createViewRoot( viewDocument, 'div', 'main' );
  137. domDiv.setAttribute( 'foo', 'bar' );
  138. domDiv.setAttribute( 'data-baz', 'qux' );
  139. domDiv.classList.add( 'foo-class' );
  140. view.attachDomRoot( domDiv );
  141. view.change( writer => {
  142. writer.addClass( 'addedClass', viewRoot );
  143. writer.setAttribute( 'added-attribute', 'foo', viewRoot );
  144. writer.setAttribute( 'foo', 'changed the value', viewRoot );
  145. } );
  146. view.detachDomRoot( 'main' );
  147. const attributes = {};
  148. for ( const attribute of domDiv.attributes ) {
  149. attributes[ attribute.name ] = attribute.value;
  150. }
  151. expect( attributes ).to.deep.equal( {
  152. foo: 'bar',
  153. 'data-baz': 'qux',
  154. class: 'foo-class'
  155. } );
  156. domDiv.remove();
  157. } );
  158. it( 'should remove the "contenteditable" attribute from the DOM root', () => {
  159. const domDiv = document.createElement( 'div' );
  160. const viewRoot = createViewRoot( viewDocument, 'div', 'main' );
  161. view.attachDomRoot( domDiv );
  162. view.render();
  163. viewRoot.isReadOnly = false;
  164. expect( domDiv.getAttribute( 'contenteditable' ) ).to.equal( 'true' );
  165. view.detachDomRoot( 'main' );
  166. expect( domDiv.hasAttribute( 'contenteditable' ) ).to.be.false;
  167. domDiv.remove();
  168. } );
  169. } );
  170. describe( 'addObserver()', () => {
  171. beforeEach( () => {
  172. // The variable will be overwritten.
  173. view.destroy();
  174. view = new View();
  175. viewDocument = view.document;
  176. view._renderer.render = sinon.spy();
  177. } );
  178. afterEach( () => {
  179. view.destroy();
  180. } );
  181. it( 'should be instantiated and enabled on adding', () => {
  182. const observerMock = view.addObserver( ObserverMock );
  183. expect( view._observers.size ).to.equal( DEFAULT_OBSERVERS_COUNT + 1 );
  184. expect( observerMock ).to.have.property( 'document', viewDocument );
  185. sinon.assert.calledOnce( observerMock.enable );
  186. } );
  187. it( 'should return observer instance each time addObserver is called', () => {
  188. const observerMock1 = view.addObserver( ObserverMock );
  189. const observerMock2 = view.addObserver( ObserverMock );
  190. expect( observerMock1 ).to.be.instanceof( ObserverMock );
  191. expect( observerMock2 ).to.be.instanceof( ObserverMock );
  192. expect( observerMock1 ).to.equals( observerMock2 );
  193. } );
  194. it( 'should instantiate one observer only once', () => {
  195. view.addObserver( ObserverMockGlobalCount );
  196. view.addObserver( ObserverMockGlobalCount );
  197. expect( view._observers.size ).to.equal( DEFAULT_OBSERVERS_COUNT + 1 );
  198. expect( instantiated ).to.equal( 1 );
  199. expect( enabled ).to.equal( 1 );
  200. view.addObserver( ObserverMock );
  201. expect( view._observers.size ).to.equal( DEFAULT_OBSERVERS_COUNT + 2 );
  202. } );
  203. it( 'should instantiate child class of already registered observer', () => {
  204. class ObserverMock extends Observer {
  205. enable() {}
  206. }
  207. class ChildObserverMock extends ObserverMock {
  208. enable() {}
  209. }
  210. view.addObserver( ObserverMock );
  211. view.addObserver( ChildObserverMock );
  212. expect( view._observers.size ).to.equal( DEFAULT_OBSERVERS_COUNT + 2 );
  213. } );
  214. it( 'should be disabled and re-enabled on render', () => {
  215. const observerMock = view.addObserver( ObserverMock );
  216. view.render();
  217. sinon.assert.calledOnce( observerMock.disable );
  218. sinon.assert.calledOnce( view._renderer.render );
  219. sinon.assert.calledTwice( observerMock.enable );
  220. } );
  221. it( 'should call observe on each root', () => {
  222. createViewRoot( viewDocument, 'div', 'roo1' );
  223. createViewRoot( viewDocument, 'div', 'roo2' );
  224. view.attachDomRoot( document.createElement( 'div' ), 'roo1' );
  225. view.attachDomRoot( document.createElement( 'div' ), 'roo2' );
  226. const observerMock = view.addObserver( ObserverMock );
  227. sinon.assert.calledTwice( observerMock.observe );
  228. } );
  229. } );
  230. describe( 'getObserver()', () => {
  231. it( 'should return observer it it is added', () => {
  232. const addedObserverMock = view.addObserver( ObserverMock );
  233. const getObserverMock = view.getObserver( ObserverMock );
  234. expect( getObserverMock ).to.be.instanceof( ObserverMock );
  235. expect( getObserverMock ).to.equal( addedObserverMock );
  236. } );
  237. it( 'should return undefined if observer is not added', () => {
  238. const getObserverMock = view.getObserver( ObserverMock );
  239. expect( getObserverMock ).to.be.undefined;
  240. } );
  241. } );
  242. describe( 'scrollToTheSelection()', () => {
  243. beforeEach( () => {
  244. // Silence the Rect warnings.
  245. testUtils.sinon.stub( log, 'warn' );
  246. } );
  247. it( 'does nothing when there are no ranges in the selection', () => {
  248. const stub = testUtils.sinon.stub( global.window, 'scrollTo' );
  249. view.scrollToTheSelection();
  250. sinon.assert.notCalled( stub );
  251. } );
  252. it( 'scrolls to the first range in selection with an offset', () => {
  253. const root = createViewRoot( viewDocument, 'div', 'main' );
  254. const stub = testUtils.sinon.stub( global.window, 'scrollTo' );
  255. const range = ViewRange._createIn( root );
  256. view.attachDomRoot( domRoot );
  257. view.change( writer => {
  258. writer.setSelection( range );
  259. } );
  260. // Make sure the window will have to scroll to the domRoot.
  261. Object.assign( domRoot.style, {
  262. position: 'absolute',
  263. top: '-1000px',
  264. left: '-1000px'
  265. } );
  266. view.scrollToTheSelection();
  267. sinon.assert.calledWithMatch( stub, sinon.match.number, sinon.match.number );
  268. } );
  269. } );
  270. describe( 'disableObservers()', () => {
  271. it( 'should disable observers', () => {
  272. const addedObserverMock = view.addObserver( ObserverMock );
  273. expect( addedObserverMock.enable.calledOnce ).to.be.true;
  274. expect( addedObserverMock.disable.called ).to.be.false;
  275. view.disableObservers();
  276. expect( addedObserverMock.enable.calledOnce ).to.be.true;
  277. expect( addedObserverMock.disable.calledOnce ).to.be.true;
  278. } );
  279. } );
  280. describe( 'enableObservers()', () => {
  281. it( 'should enable observers', () => {
  282. const addedObserverMock = view.addObserver( ObserverMock );
  283. view.disableObservers();
  284. expect( addedObserverMock.enable.calledOnce ).to.be.true;
  285. expect( addedObserverMock.disable.calledOnce ).to.be.true;
  286. view.enableObservers();
  287. expect( addedObserverMock.enable.calledTwice ).to.be.true;
  288. expect( addedObserverMock.disable.calledOnce ).to.be.true;
  289. } );
  290. } );
  291. describe( 'focus()', () => {
  292. let domEditable, viewEditable;
  293. beforeEach( () => {
  294. domEditable = document.createElement( 'div' );
  295. domEditable.setAttribute( 'contenteditable', 'true' );
  296. document.body.appendChild( domEditable );
  297. viewEditable = createViewRoot( viewDocument, 'div', 'main' );
  298. view.attachDomRoot( domEditable );
  299. view.change( writer => {
  300. writer.setSelection( viewEditable, 0 );
  301. } );
  302. } );
  303. afterEach( () => {
  304. document.body.removeChild( domEditable );
  305. } );
  306. it( 'should focus editable with selection', () => {
  307. const converterFocusSpy = testUtils.sinon.spy( view.domConverter, 'focus' );
  308. const renderSpy = testUtils.sinon.spy( view, 'render' );
  309. view.focus();
  310. expect( converterFocusSpy.called ).to.be.true;
  311. expect( renderSpy.calledOnce ).to.be.true;
  312. expect( document.activeElement ).to.equal( domEditable );
  313. const domSelection = document.getSelection();
  314. expect( domSelection.rangeCount ).to.equal( 1 );
  315. const domRange = domSelection.getRangeAt( 0 );
  316. expect( domRange.startContainer ).to.equal( domEditable );
  317. expect( domRange.startOffset ).to.equal( 0 );
  318. expect( domRange.collapsed ).to.be.true;
  319. } );
  320. it( 'should not focus if document is already focused', () => {
  321. const converterFocusSpy = testUtils.sinon.spy( view.domConverter, 'focus' );
  322. const renderSpy = testUtils.sinon.spy( view, 'render' );
  323. viewDocument.isFocused = true;
  324. view.focus();
  325. expect( converterFocusSpy.called ).to.be.false;
  326. expect( renderSpy.called ).to.be.false;
  327. } );
  328. it( 'should log warning when no selection', () => {
  329. const logSpy = testUtils.sinon.stub( log, 'warn' );
  330. view.change( writer => {
  331. writer.setSelection( null );
  332. } );
  333. view.focus();
  334. expect( logSpy.calledOnce ).to.be.true;
  335. expect( logSpy.args[ 0 ][ 0 ] ).to.match( /^view-focus-no-selection/ );
  336. } );
  337. } );
  338. describe( 'isFocused', () => {
  339. it( 'should change renderer.isFocused too', () => {
  340. expect( viewDocument.isFocused ).to.equal( false );
  341. expect( view._renderer.isFocused ).to.equal( false );
  342. viewDocument.isFocused = true;
  343. expect( viewDocument.isFocused ).to.equal( true );
  344. expect( view._renderer.isFocused ).to.equal( true );
  345. } );
  346. } );
  347. describe( 'render()', () => {
  348. it( 'disable observers, renders and enable observers', () => {
  349. const observerMock = view.addObserver( ObserverMock );
  350. const renderStub = sinon.stub( view._renderer, 'render' );
  351. view.render();
  352. sinon.assert.callOrder( observerMock.disable, renderStub, observerMock.enable );
  353. } );
  354. it( 'should fire view.document.layoutChanged event on render', () => {
  355. const spy = sinon.spy();
  356. view.document.on( 'layoutChanged', spy );
  357. view.render();
  358. sinon.assert.calledOnce( spy );
  359. view.render();
  360. sinon.assert.calledTwice( spy );
  361. } );
  362. } );
  363. describe( 'view and DOM integration', () => {
  364. it( 'should remove content of the DOM', () => {
  365. const domDiv = createElement( document, 'div', { id: 'editor' }, [
  366. createElement( document, 'p' ),
  367. createElement( document, 'p' )
  368. ] );
  369. const view = new View();
  370. const viewDocument = view.document;
  371. createViewRoot( viewDocument, 'div', 'main' );
  372. view.attachDomRoot( domDiv );
  373. view.render();
  374. expect( domDiv.childNodes.length ).to.equal( 1 );
  375. expect( isBlockFiller( domDiv.childNodes[ 0 ], BR_FILLER ) ).to.be.true;
  376. view.destroy();
  377. domDiv.remove();
  378. } );
  379. it( 'should render changes in the Document', () => {
  380. const domDiv = document.createElement( 'div' );
  381. const view = new View();
  382. const viewDocument = view.document;
  383. createViewRoot( viewDocument, 'div', 'main' );
  384. view.attachDomRoot( domDiv );
  385. viewDocument.getRoot()._appendChild( new ViewElement( 'p' ) );
  386. view.render();
  387. expect( domDiv.childNodes.length ).to.equal( 1 );
  388. expect( domDiv.childNodes[ 0 ].tagName ).to.equal( 'P' );
  389. view.destroy();
  390. } );
  391. it( 'should render attribute changes', () => {
  392. const domRoot = document.createElement( 'div' );
  393. const view = new View();
  394. const viewDocument = view.document;
  395. const viewRoot = createViewRoot( viewDocument, 'div', 'main' );
  396. view.attachDomRoot( domRoot );
  397. const viewP = new ViewElement( 'p', { class: 'foo' } );
  398. viewRoot._appendChild( viewP );
  399. view.render();
  400. expect( domRoot.childNodes.length ).to.equal( 1 );
  401. expect( domRoot.childNodes[ 0 ].getAttribute( 'class' ) ).to.equal( 'foo' );
  402. viewP._setAttribute( 'class', 'bar' );
  403. view.render();
  404. expect( domRoot.childNodes.length ).to.equal( 1 );
  405. expect( domRoot.childNodes[ 0 ].getAttribute( 'class' ) ).to.equal( 'bar' );
  406. view.destroy();
  407. domRoot.remove();
  408. } );
  409. } );
  410. describe( 'change()', () => {
  411. it( 'should throw when someone tries to change view during rendering', () => {
  412. const domDiv = document.createElement( 'div' );
  413. const viewRoot = createViewRoot( viewDocument, 'div', 'main' );
  414. let renderingCalled = false;
  415. view.attachDomRoot( domDiv );
  416. view.change( writer => {
  417. const p = writer.createContainerElement( 'p' );
  418. const ui = writer.createUIElement( 'span', null, function( domDocument ) {
  419. const element = this.toDomElement( domDocument );
  420. expect( () => view.change( () => {} ) ).to.throw( CKEditorError, /^cannot-change-view-tree/ );
  421. renderingCalled = true;
  422. return element;
  423. } );
  424. writer.insert( ViewPosition._createAt( p, 0 ), ui );
  425. writer.insert( ViewPosition._createAt( viewRoot, 0 ), p );
  426. } );
  427. expect( renderingCalled ).to.be.true;
  428. domDiv.remove();
  429. } );
  430. it( 'should throw when someone tries to use change() method in post-fixer', () => {
  431. const domDiv = document.createElement( 'div' );
  432. createViewRoot( viewDocument, 'div', 'main' );
  433. view.attachDomRoot( domDiv );
  434. viewDocument.registerPostFixer( () => {
  435. expect( () => {
  436. view.change( () => {} );
  437. } ).to.throw( CKEditorError, /^cannot-change-view-tree/ );
  438. } );
  439. view.render();
  440. domDiv.remove();
  441. } );
  442. it( 'should fire render event and it should trigger rendering before listeners on normal priority', () => {
  443. const renderSpy = sinon.spy( view._renderer, 'render' );
  444. const eventSpy = sinon.spy();
  445. view.on( 'render', eventSpy );
  446. view.change( () => {} );
  447. sinon.assert.callOrder( renderSpy, eventSpy );
  448. } );
  449. it( 'should fire render event once for nested change blocks', () => {
  450. const renderSpy = sinon.spy( view._renderer, 'render' );
  451. const eventSpy = sinon.spy();
  452. view.on( 'render', eventSpy );
  453. view.change( () => {
  454. view.change( () => {} );
  455. view.change( () => {
  456. view.change( () => {} );
  457. view.change( () => {} );
  458. } );
  459. view.change( () => {} );
  460. } );
  461. sinon.assert.calledOnce( renderSpy );
  462. sinon.assert.calledOnce( eventSpy );
  463. sinon.assert.callOrder( renderSpy, eventSpy );
  464. } );
  465. it( 'should fire render event once even if render is called during the change', () => {
  466. const renderSpy = sinon.spy( view._renderer, 'render' );
  467. const eventSpy = sinon.spy();
  468. view.on( 'render', eventSpy );
  469. view.change( () => {
  470. view.render();
  471. view.change( () => {
  472. view.render();
  473. } );
  474. view.render();
  475. } );
  476. sinon.assert.calledOnce( renderSpy );
  477. sinon.assert.calledOnce( eventSpy );
  478. sinon.assert.callOrder( renderSpy, eventSpy );
  479. } );
  480. it( 'should call post-fixers after change but before rendering', () => {
  481. const postFixer1 = sinon.spy( () => false );
  482. const postFixer2 = sinon.spy( () => false );
  483. const changeSpy = sinon.spy();
  484. const eventSpy = sinon.spy();
  485. viewDocument.registerPostFixer( postFixer1 );
  486. viewDocument.registerPostFixer( postFixer2 );
  487. view.on( 'render', eventSpy );
  488. view.change( changeSpy );
  489. sinon.assert.calledOnce( postFixer1 );
  490. sinon.assert.calledOnce( postFixer2 );
  491. sinon.assert.calledOnce( changeSpy );
  492. sinon.assert.calledOnce( eventSpy );
  493. sinon.assert.callOrder( changeSpy, postFixer1, postFixer2, eventSpy );
  494. } );
  495. it( 'should call post-fixers until all are done', () => {
  496. let called = false;
  497. const postFixer1 = sinon.spy();
  498. const postFixer2 = sinon.spy();
  499. const changeSpy = sinon.spy();
  500. const eventSpy = sinon.spy();
  501. viewDocument.registerPostFixer( () => {
  502. if ( !called ) {
  503. called = true;
  504. postFixer1();
  505. return true;
  506. }
  507. postFixer2();
  508. return false;
  509. } );
  510. view.on( 'render', eventSpy );
  511. view.change( changeSpy );
  512. sinon.assert.calledOnce( postFixer1 );
  513. sinon.assert.calledOnce( postFixer2 );
  514. sinon.assert.calledOnce( changeSpy );
  515. sinon.assert.calledOnce( eventSpy );
  516. sinon.assert.callOrder( changeSpy, postFixer1, postFixer2, eventSpy );
  517. } );
  518. it( 'should return result of the callback', () => {
  519. const result = view.change( () => {
  520. return 'FooBar';
  521. } );
  522. expect( result ).to.equal( 'FooBar' );
  523. } );
  524. it( 'should return result of the callback with nested change block', () => {
  525. let result2 = false;
  526. let result3 = false;
  527. const result1 = view.change( () => {
  528. return view.change( () => {
  529. result2 = view.change( () => {
  530. return true;
  531. } );
  532. result3 = view.change( () => {} );
  533. return 42;
  534. } );
  535. } );
  536. expect( result1 ).to.equal( 42 );
  537. expect( result2 ).to.equal( true );
  538. expect( result3 ).to.undefined;
  539. } );
  540. } );
  541. describe( 'createPositionAt()', () => {
  542. it( 'should return instance of Position', () => {
  543. createViewRoot( viewDocument, 'div', 'main' );
  544. viewDocument.getRoot()._appendChild( new ViewElement( 'p' ) );
  545. expect( view.createPositionAt( viewDocument.getRoot(), 0 ) ).to.be.instanceof( ViewPosition );
  546. } );
  547. } );
  548. describe( 'createPositionAfter()', () => {
  549. it( 'should return instance of Position', () => {
  550. createViewRoot( viewDocument, 'div', 'main' );
  551. viewDocument.getRoot()._appendChild( new ViewElement( 'p' ) );
  552. expect( view.createPositionAfter( viewDocument.getRoot().getChild( 0 ) ) ).to.be.instanceof( ViewPosition );
  553. } );
  554. } );
  555. describe( 'createPositionBefore()', () => {
  556. it( 'should return instance of Position', () => {
  557. createViewRoot( viewDocument, 'div', 'main' );
  558. viewDocument.getRoot()._appendChild( new ViewElement( 'p' ) );
  559. expect( view.createPositionBefore( viewDocument.getRoot().getChild( 0 ) ) ).to.be.instanceof( ViewPosition );
  560. } );
  561. } );
  562. describe( 'createRange()', () => {
  563. it( 'should return instance of Range', () => {
  564. createViewRoot( viewDocument, 'div', 'main' );
  565. viewDocument.getRoot()._appendChild( new ViewElement( 'p' ) );
  566. expect( view.createRange( view.createPositionAt( viewDocument.getRoot(), 0 ) ) ).to.be.instanceof( ViewRange );
  567. } );
  568. } );
  569. describe( 'createRangeIn()', () => {
  570. it( 'should return instance of Range', () => {
  571. createViewRoot( viewDocument, 'div', 'main' );
  572. viewDocument.getRoot()._appendChild( new ViewElement( 'p' ) );
  573. expect( view.createRangeIn( viewDocument.getRoot().getChild( 0 ) ) ).to.be.instanceof( ViewRange );
  574. } );
  575. } );
  576. describe( 'createRangeOn()', () => {
  577. it( 'should return instance of Range', () => {
  578. createViewRoot( viewDocument, 'div', 'main' );
  579. viewDocument.getRoot()._appendChild( new ViewElement( 'p' ) );
  580. expect( view.createRangeOn( viewDocument.getRoot().getChild( 0 ) ) ).to.be.instanceof( ViewRange );
  581. } );
  582. } );
  583. describe( 'createSelection()', () => {
  584. it( 'should return instance of Selection', () => {
  585. createViewRoot( viewDocument, 'div', 'main' );
  586. viewDocument.getRoot()._appendChild( new ViewElement( 'p' ) );
  587. expect( view.createSelection() ).to.be.instanceof( ViewSelection );
  588. } );
  589. } );
  590. describe( 'destroy()', () => {
  591. it( 'should destroy all observers', () => {
  592. const observerMock = view.addObserver( ObserverMock );
  593. view.destroy();
  594. sinon.assert.calledOnce( observerMock.destroy );
  595. } );
  596. } );
  597. } );