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view.js 21 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 call observe on each observer', () => {
  96. // The variable will be overwritten.
  97. view.destroy();
  98. view = new View();
  99. viewDocument = view.document;
  100. view._renderer.render = sinon.spy();
  101. const domDiv1 = document.createElement( 'div' );
  102. domDiv1.setAttribute( 'id', 'editor' );
  103. const domDiv2 = document.createElement( 'div' );
  104. domDiv2.setAttribute( 'id', 'editor' );
  105. const observerMock = view.addObserver( ObserverMock );
  106. const observerMockGlobalCount = view.addObserver( ObserverMockGlobalCount );
  107. createViewRoot( viewDocument, 'div', 'root1' );
  108. view.attachDomRoot( document.createElement( 'div' ), 'root1' );
  109. sinon.assert.calledOnce( observerMock.observe );
  110. sinon.assert.calledOnce( observerMockGlobalCount.observe );
  111. } );
  112. } );
  113. describe( 'addObserver()', () => {
  114. beforeEach( () => {
  115. // The variable will be overwritten.
  116. view.destroy();
  117. view = new View();
  118. viewDocument = view.document;
  119. view._renderer.render = sinon.spy();
  120. } );
  121. afterEach( () => {
  122. view.destroy();
  123. } );
  124. it( 'should be instantiated and enabled on adding', () => {
  125. const observerMock = view.addObserver( ObserverMock );
  126. expect( view._observers.size ).to.equal( DEFAULT_OBSERVERS_COUNT + 1 );
  127. expect( observerMock ).to.have.property( 'document', viewDocument );
  128. sinon.assert.calledOnce( observerMock.enable );
  129. } );
  130. it( 'should return observer instance each time addObserver is called', () => {
  131. const observerMock1 = view.addObserver( ObserverMock );
  132. const observerMock2 = view.addObserver( ObserverMock );
  133. expect( observerMock1 ).to.be.instanceof( ObserverMock );
  134. expect( observerMock2 ).to.be.instanceof( ObserverMock );
  135. expect( observerMock1 ).to.equals( observerMock2 );
  136. } );
  137. it( 'should instantiate one observer only once', () => {
  138. view.addObserver( ObserverMockGlobalCount );
  139. view.addObserver( ObserverMockGlobalCount );
  140. expect( view._observers.size ).to.equal( DEFAULT_OBSERVERS_COUNT + 1 );
  141. expect( instantiated ).to.equal( 1 );
  142. expect( enabled ).to.equal( 1 );
  143. view.addObserver( ObserverMock );
  144. expect( view._observers.size ).to.equal( DEFAULT_OBSERVERS_COUNT + 2 );
  145. } );
  146. it( 'should instantiate child class of already registered observer', () => {
  147. class ObserverMock extends Observer {
  148. enable() {}
  149. }
  150. class ChildObserverMock extends ObserverMock {
  151. enable() {}
  152. }
  153. view.addObserver( ObserverMock );
  154. view.addObserver( ChildObserverMock );
  155. expect( view._observers.size ).to.equal( DEFAULT_OBSERVERS_COUNT + 2 );
  156. } );
  157. it( 'should be disabled and re-enabled on render', () => {
  158. const observerMock = view.addObserver( ObserverMock );
  159. view.render();
  160. sinon.assert.calledOnce( observerMock.disable );
  161. sinon.assert.calledOnce( view._renderer.render );
  162. sinon.assert.calledTwice( observerMock.enable );
  163. } );
  164. it( 'should call observe on each root', () => {
  165. createViewRoot( viewDocument, 'div', 'roo1' );
  166. createViewRoot( viewDocument, 'div', 'roo2' );
  167. view.attachDomRoot( document.createElement( 'div' ), 'roo1' );
  168. view.attachDomRoot( document.createElement( 'div' ), 'roo2' );
  169. const observerMock = view.addObserver( ObserverMock );
  170. sinon.assert.calledTwice( observerMock.observe );
  171. } );
  172. } );
  173. describe( 'getObserver()', () => {
  174. it( 'should return observer it it is added', () => {
  175. const addedObserverMock = view.addObserver( ObserverMock );
  176. const getObserverMock = view.getObserver( ObserverMock );
  177. expect( getObserverMock ).to.be.instanceof( ObserverMock );
  178. expect( getObserverMock ).to.equal( addedObserverMock );
  179. } );
  180. it( 'should return undefined if observer is not added', () => {
  181. const getObserverMock = view.getObserver( ObserverMock );
  182. expect( getObserverMock ).to.be.undefined;
  183. } );
  184. } );
  185. describe( 'scrollToTheSelection()', () => {
  186. beforeEach( () => {
  187. // Silence the Rect warnings.
  188. testUtils.sinon.stub( log, 'warn' );
  189. } );
  190. it( 'does nothing when there are no ranges in the selection', () => {
  191. const stub = testUtils.sinon.stub( global.window, 'scrollTo' );
  192. view.scrollToTheSelection();
  193. sinon.assert.notCalled( stub );
  194. } );
  195. it( 'scrolls to the first range in selection with an offset', () => {
  196. const root = createViewRoot( viewDocument, 'div', 'main' );
  197. const stub = testUtils.sinon.stub( global.window, 'scrollTo' );
  198. const range = ViewRange._createIn( root );
  199. view.attachDomRoot( domRoot );
  200. // Make sure the window will have to scroll to the domRoot.
  201. Object.assign( domRoot.style, {
  202. position: 'absolute',
  203. top: '-1000px',
  204. left: '-1000px'
  205. } );
  206. view.change( writer => {
  207. writer.setSelection( range );
  208. } );
  209. view.scrollToTheSelection();
  210. sinon.assert.calledWithMatch( stub, sinon.match.number, sinon.match.number );
  211. } );
  212. } );
  213. describe( 'disableObservers()', () => {
  214. it( 'should disable observers', () => {
  215. const addedObserverMock = view.addObserver( ObserverMock );
  216. expect( addedObserverMock.enable.calledOnce ).to.be.true;
  217. expect( addedObserverMock.disable.called ).to.be.false;
  218. view.disableObservers();
  219. expect( addedObserverMock.enable.calledOnce ).to.be.true;
  220. expect( addedObserverMock.disable.calledOnce ).to.be.true;
  221. } );
  222. } );
  223. describe( 'enableObservers()', () => {
  224. it( 'should enable observers', () => {
  225. const addedObserverMock = view.addObserver( ObserverMock );
  226. view.disableObservers();
  227. expect( addedObserverMock.enable.calledOnce ).to.be.true;
  228. expect( addedObserverMock.disable.calledOnce ).to.be.true;
  229. view.enableObservers();
  230. expect( addedObserverMock.enable.calledTwice ).to.be.true;
  231. expect( addedObserverMock.disable.calledOnce ).to.be.true;
  232. } );
  233. } );
  234. describe( 'focus()', () => {
  235. let domEditable, viewEditable;
  236. beforeEach( () => {
  237. domEditable = document.createElement( 'div' );
  238. domEditable.setAttribute( 'contenteditable', 'true' );
  239. document.body.appendChild( domEditable );
  240. viewEditable = createViewRoot( viewDocument, 'div', 'main' );
  241. view.attachDomRoot( domEditable );
  242. view.change( writer => {
  243. writer.setSelection( viewEditable, 0 );
  244. } );
  245. } );
  246. afterEach( () => {
  247. document.body.removeChild( domEditable );
  248. } );
  249. it( 'should focus editable with selection', () => {
  250. const converterFocusSpy = testUtils.sinon.spy( view.domConverter, 'focus' );
  251. const renderSpy = testUtils.sinon.spy( view, 'render' );
  252. view.focus();
  253. expect( converterFocusSpy.called ).to.be.true;
  254. expect( renderSpy.calledOnce ).to.be.true;
  255. expect( document.activeElement ).to.equal( domEditable );
  256. const domSelection = document.getSelection();
  257. expect( domSelection.rangeCount ).to.equal( 1 );
  258. const domRange = domSelection.getRangeAt( 0 );
  259. expect( domRange.startContainer ).to.equal( domEditable );
  260. expect( domRange.startOffset ).to.equal( 0 );
  261. expect( domRange.collapsed ).to.be.true;
  262. } );
  263. it( 'should not focus if document is already focused', () => {
  264. const converterFocusSpy = testUtils.sinon.spy( view.domConverter, 'focus' );
  265. const renderSpy = testUtils.sinon.spy( view, 'render' );
  266. viewDocument.isFocused = true;
  267. view.focus();
  268. expect( converterFocusSpy.called ).to.be.false;
  269. expect( renderSpy.called ).to.be.false;
  270. } );
  271. it( 'should log warning when no selection', () => {
  272. const logSpy = testUtils.sinon.stub( log, 'warn' );
  273. view.change( writer => {
  274. writer.setSelection( null );
  275. } );
  276. view.focus();
  277. expect( logSpy.calledOnce ).to.be.true;
  278. expect( logSpy.args[ 0 ][ 0 ] ).to.match( /^view-focus-no-selection/ );
  279. } );
  280. } );
  281. describe( 'isFocused', () => {
  282. it( 'should change renderer.isFocused too', () => {
  283. expect( viewDocument.isFocused ).to.equal( false );
  284. expect( view._renderer.isFocused ).to.equal( false );
  285. viewDocument.isFocused = true;
  286. expect( viewDocument.isFocused ).to.equal( true );
  287. expect( view._renderer.isFocused ).to.equal( true );
  288. } );
  289. } );
  290. describe( 'render()', () => {
  291. it( 'disable observers, renders and enable observers', () => {
  292. const observerMock = view.addObserver( ObserverMock );
  293. const renderStub = sinon.stub( view._renderer, 'render' );
  294. view.render();
  295. sinon.assert.callOrder( observerMock.disable, renderStub, observerMock.enable );
  296. } );
  297. it( 'should fire view.document.layoutChanged event on render', () => {
  298. const spy = sinon.spy();
  299. view.document.on( 'layoutChanged', spy );
  300. view.render();
  301. sinon.assert.calledOnce( spy );
  302. view.render();
  303. sinon.assert.calledTwice( spy );
  304. } );
  305. } );
  306. describe( 'view and DOM integration', () => {
  307. it( 'should remove content of the DOM', () => {
  308. const domDiv = createElement( document, 'div', { id: 'editor' }, [
  309. createElement( document, 'p' ),
  310. createElement( document, 'p' )
  311. ] );
  312. const view = new View();
  313. const viewDocument = view.document;
  314. createViewRoot( viewDocument, 'div', 'main' );
  315. view.attachDomRoot( domDiv );
  316. view.render();
  317. expect( domDiv.childNodes.length ).to.equal( 1 );
  318. expect( isBlockFiller( domDiv.childNodes[ 0 ], BR_FILLER ) ).to.be.true;
  319. view.destroy();
  320. domDiv.remove();
  321. } );
  322. it( 'should render changes in the Document', () => {
  323. const domDiv = document.createElement( 'div' );
  324. const view = new View();
  325. const viewDocument = view.document;
  326. createViewRoot( viewDocument, 'div', 'main' );
  327. view.attachDomRoot( domDiv );
  328. viewDocument.getRoot()._appendChild( new ViewElement( 'p' ) );
  329. view.render();
  330. expect( domDiv.childNodes.length ).to.equal( 1 );
  331. expect( domDiv.childNodes[ 0 ].tagName ).to.equal( 'P' );
  332. view.destroy();
  333. } );
  334. it( 'should render attribute changes', () => {
  335. const domRoot = document.createElement( 'div' );
  336. const view = new View();
  337. const viewDocument = view.document;
  338. const viewRoot = createViewRoot( viewDocument, 'div', 'main' );
  339. view.attachDomRoot( domRoot );
  340. const viewP = new ViewElement( 'p', { class: 'foo' } );
  341. viewRoot._appendChild( viewP );
  342. view.render();
  343. expect( domRoot.childNodes.length ).to.equal( 1 );
  344. expect( domRoot.childNodes[ 0 ].getAttribute( 'class' ) ).to.equal( 'foo' );
  345. viewP._setAttribute( 'class', 'bar' );
  346. view.render();
  347. expect( domRoot.childNodes.length ).to.equal( 1 );
  348. expect( domRoot.childNodes[ 0 ].getAttribute( 'class' ) ).to.equal( 'bar' );
  349. view.destroy();
  350. domRoot.remove();
  351. } );
  352. } );
  353. describe( 'change()', () => {
  354. it( 'should throw when someone tries to change view during rendering', () => {
  355. const domDiv = document.createElement( 'div' );
  356. const viewRoot = createViewRoot( viewDocument, 'div', 'main' );
  357. let renderingCalled = false;
  358. view.attachDomRoot( domDiv );
  359. view.change( writer => {
  360. const p = writer.createContainerElement( 'p' );
  361. const ui = writer.createUIElement( 'span', null, function( domDocument ) {
  362. const element = this.toDomElement( domDocument );
  363. expect( () => view.change( () => {} ) ).to.throw( CKEditorError, /^cannot-change-view-tree/ );
  364. renderingCalled = true;
  365. return element;
  366. } );
  367. writer.insert( ViewPosition._createAt( p, 0 ), ui );
  368. writer.insert( ViewPosition._createAt( viewRoot, 0 ), p );
  369. } );
  370. expect( renderingCalled ).to.be.true;
  371. domDiv.remove();
  372. } );
  373. it( 'should throw when someone tries to use change() method in post-fixer', () => {
  374. const domDiv = document.createElement( 'div' );
  375. createViewRoot( viewDocument, 'div', 'main' );
  376. view.attachDomRoot( domDiv );
  377. viewDocument.registerPostFixer( () => {
  378. expect( () => {
  379. view.change( () => {} );
  380. } ).to.throw( CKEditorError, /^cannot-change-view-tree/ );
  381. } );
  382. view.render();
  383. domDiv.remove();
  384. } );
  385. it( 'should fire render event and it should trigger rendering before listeners on normal priority', () => {
  386. const renderSpy = sinon.spy( view._renderer, 'render' );
  387. const eventSpy = sinon.spy();
  388. view.on( 'render', eventSpy );
  389. view.change( () => {} );
  390. sinon.assert.callOrder( renderSpy, eventSpy );
  391. } );
  392. it( 'should fire render event once for nested change blocks', () => {
  393. const renderSpy = sinon.spy( view._renderer, 'render' );
  394. const eventSpy = sinon.spy();
  395. view.on( 'render', eventSpy );
  396. view.change( () => {
  397. view.change( () => {} );
  398. view.change( () => {
  399. view.change( () => {} );
  400. view.change( () => {} );
  401. } );
  402. view.change( () => {} );
  403. } );
  404. sinon.assert.calledOnce( renderSpy );
  405. sinon.assert.calledOnce( eventSpy );
  406. sinon.assert.callOrder( renderSpy, eventSpy );
  407. } );
  408. it( 'should fire render event once even if render is called during the change', () => {
  409. const renderSpy = sinon.spy( view._renderer, 'render' );
  410. const eventSpy = sinon.spy();
  411. view.on( 'render', eventSpy );
  412. view.change( () => {
  413. view.render();
  414. view.change( () => {
  415. view.render();
  416. } );
  417. view.render();
  418. } );
  419. sinon.assert.calledOnce( renderSpy );
  420. sinon.assert.calledOnce( eventSpy );
  421. sinon.assert.callOrder( renderSpy, eventSpy );
  422. } );
  423. it( 'should call post-fixers after change but before rendering', () => {
  424. const postFixer1 = sinon.spy( () => false );
  425. const postFixer2 = sinon.spy( () => false );
  426. const changeSpy = sinon.spy();
  427. const eventSpy = sinon.spy();
  428. viewDocument.registerPostFixer( postFixer1 );
  429. viewDocument.registerPostFixer( postFixer2 );
  430. view.on( 'render', eventSpy );
  431. view.change( changeSpy );
  432. sinon.assert.calledOnce( postFixer1 );
  433. sinon.assert.calledOnce( postFixer2 );
  434. sinon.assert.calledOnce( changeSpy );
  435. sinon.assert.calledOnce( eventSpy );
  436. sinon.assert.callOrder( changeSpy, postFixer1, postFixer2, eventSpy );
  437. } );
  438. it( 'should call post-fixers until all are done', () => {
  439. let called = false;
  440. const postFixer1 = sinon.spy();
  441. const postFixer2 = sinon.spy();
  442. const changeSpy = sinon.spy();
  443. const eventSpy = sinon.spy();
  444. viewDocument.registerPostFixer( () => {
  445. if ( !called ) {
  446. called = true;
  447. postFixer1();
  448. return true;
  449. }
  450. postFixer2();
  451. return false;
  452. } );
  453. view.on( 'render', eventSpy );
  454. view.change( changeSpy );
  455. sinon.assert.calledOnce( postFixer1 );
  456. sinon.assert.calledOnce( postFixer2 );
  457. sinon.assert.calledOnce( changeSpy );
  458. sinon.assert.calledOnce( eventSpy );
  459. sinon.assert.callOrder( changeSpy, postFixer1, postFixer2, eventSpy );
  460. } );
  461. it( 'should return result of the callback', () => {
  462. const result = view.change( () => {
  463. return 'FooBar';
  464. } );
  465. expect( result ).to.equal( 'FooBar' );
  466. } );
  467. it( 'should return result of the callback with nested change block', () => {
  468. let result2 = false;
  469. let result3 = false;
  470. const result1 = view.change( () => {
  471. return view.change( () => {
  472. result2 = view.change( () => {
  473. return true;
  474. } );
  475. result3 = view.change( () => {} );
  476. return 42;
  477. } );
  478. } );
  479. expect( result1 ).to.equal( 42 );
  480. expect( result2 ).to.equal( true );
  481. expect( result3 ).to.undefined;
  482. } );
  483. } );
  484. describe( 'createPositionAt()', () => {
  485. it( 'should return instance of Position', () => {
  486. createViewRoot( viewDocument, 'div', 'main' );
  487. viewDocument.getRoot()._appendChild( new ViewElement( 'p' ) );
  488. expect( view.createPositionAt( viewDocument.getRoot(), 0 ) ).to.be.instanceof( ViewPosition );
  489. } );
  490. } );
  491. describe( 'createPositionAfter()', () => {
  492. it( 'should return instance of Position', () => {
  493. createViewRoot( viewDocument, 'div', 'main' );
  494. viewDocument.getRoot()._appendChild( new ViewElement( 'p' ) );
  495. expect( view.createPositionAfter( viewDocument.getRoot().getChild( 0 ) ) ).to.be.instanceof( ViewPosition );
  496. } );
  497. } );
  498. describe( 'createPositionBefore()', () => {
  499. it( 'should return instance of Position', () => {
  500. createViewRoot( viewDocument, 'div', 'main' );
  501. viewDocument.getRoot()._appendChild( new ViewElement( 'p' ) );
  502. expect( view.createPositionBefore( viewDocument.getRoot().getChild( 0 ) ) ).to.be.instanceof( ViewPosition );
  503. } );
  504. } );
  505. describe( 'createRange()', () => {
  506. it( 'should return instance of Range', () => {
  507. createViewRoot( viewDocument, 'div', 'main' );
  508. viewDocument.getRoot()._appendChild( new ViewElement( 'p' ) );
  509. expect( view.createRange( view.createPositionAt( viewDocument.getRoot(), 0 ) ) ).to.be.instanceof( ViewRange );
  510. } );
  511. } );
  512. describe( 'createRangeIn()', () => {
  513. it( 'should return instance of Range', () => {
  514. createViewRoot( viewDocument, 'div', 'main' );
  515. viewDocument.getRoot()._appendChild( new ViewElement( 'p' ) );
  516. expect( view.createRangeIn( viewDocument.getRoot().getChild( 0 ) ) ).to.be.instanceof( ViewRange );
  517. } );
  518. } );
  519. describe( 'createRangeOn()', () => {
  520. it( 'should return instance of Range', () => {
  521. createViewRoot( viewDocument, 'div', 'main' );
  522. viewDocument.getRoot()._appendChild( new ViewElement( 'p' ) );
  523. expect( view.createRangeOn( viewDocument.getRoot().getChild( 0 ) ) ).to.be.instanceof( ViewRange );
  524. } );
  525. } );
  526. describe( 'createSelection()', () => {
  527. it( 'should return instance of Selection', () => {
  528. createViewRoot( viewDocument, 'div', 'main' );
  529. viewDocument.getRoot()._appendChild( new ViewElement( 'p' ) );
  530. expect( view.createSelection() ).to.be.instanceof( ViewSelection );
  531. } );
  532. } );
  533. describe( 'destroy()', () => {
  534. it( 'should destroy all observers', () => {
  535. const observerMock = view.addObserver( ObserverMock );
  536. view.destroy();
  537. sinon.assert.calledOnce( observerMock.destroy );
  538. } );
  539. } );
  540. } );