view.js 21 KB

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