text: /**
   * @license Copyright (c) 2003-2020, CKSource - Frederico Knabben. All rights reserved.
   * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
   */
  
  import LinkEditing from '../src/linkediting';
  import LinkCommand from '../src/linkcommand';
  import UnlinkCommand from '../src/unlinkcommand';
  
  import ClassicTestEditor from '@ckeditor/ckeditor5-core/tests/_utils/classictesteditor';
  import Plugin from '@ckeditor/ckeditor5-core/src/plugin';
  import BoldEditing from '@ckeditor/ckeditor5-basic-styles/src/bold/boldediting';
  import ItalicEditing from '@ckeditor/ckeditor5-basic-styles/src/italic/italicediting';
  import Clipboard from '@ckeditor/ckeditor5-clipboard/src/clipboard';
  import Enter from '@ckeditor/ckeditor5-enter/src/enter';
  import DomEventData from '@ckeditor/ckeditor5-engine/src/view/observer/domeventdata';
  import ImageEditing from '@ckeditor/ckeditor5-image/src/image/imageediting';
  import Paragraph from '@ckeditor/ckeditor5-paragraph/src/paragraph';
  import Input from '@ckeditor/ckeditor5-typing/src/input';
  import { getData as getModelData, setData as setModelData } from '@ckeditor/ckeditor5-engine/src/dev-utils/model';
  import { getData as getViewData } from '@ckeditor/ckeditor5-engine/src/dev-utils/view';
  import { keyCodes } from '@ckeditor/ckeditor5-utils/src/keyboard';
  import { isLinkElement } from '../src/utils';
  
  /* global document */
  
  describe( 'LinkEditing', () => {
  	let element, editor, model, view;
  
  	beforeEach( async () => {
  		element = document.createElement( 'div' );
  		document.body.appendChild( element );
  
  		editor = await ClassicTestEditor.create( element, {
  			plugins: [ Paragraph, LinkEditing, Enter ],
  			link: {
  				decorators: {
  					isExternal: {
  						mode: 'manual',
  						label: 'Open in a new window',
  						attributes: {
  							target: '_blank',
  							rel: 'noopener noreferrer'
  						}
  					}
  				}
  			}
  		} );
  
  		editor.model.schema.extend( '$text', { allowAttributes: 'bold' } );
  
  		editor.conversion.attributeToElement( {
  			model: 'bold',
  			view: 'b'
  		} );
  
  		model = editor.model;
  		view = editor.editing.view;
  	} );
  
  	afterEach( async () => {
  		element.remove();
  
  		await editor.destroy();
  	} );
  
  	it( 'should have pluginName', () => {
  		expect( LinkEditing.pluginName ).to.equal( 'LinkEditing' );
  	} );
  
  	it( 'should be loaded', () => {
  		expect( editor.plugins.get( LinkEditing ) ).to.be.instanceOf( LinkEditing );
  	} );
  
  	it( 'should set proper schema rules', () => {
  		expect( model.schema.checkAttribute( [ '$block', '$text' ], 'linkHref' ) ).to.be.true;
  		expect( model.schema.checkAttribute( [ '$clipboardHolder', '$text' ], 'linkHref' ) ).to.be.true;
  
  		expect( model.schema.checkAttribute( [ '$block' ], 'linkHref' ) ).to.be.false;
  	} );
  
  	// Let's check only the minimum to not duplicate `TwoStepCaretMovement` tests.
  	// Testing minimum is better than testing using spies that might give false positive results.
  	describe( 'two-step caret movement', () => {
  		it( 'should be bound to the `linkHref` attribute (LTR)', () => {
  			const selection = editor.model.document.selection;
  
  			// Put selection before the link element.
  			setModelData( editor.model, '<paragraph>foo[]<$text linkHref="url">b</$text>ar</paragraph>' );
  
  			// The selection's gravity should read attributes from the left.
  			expect( selection.hasAttribute( 'linkHref' ), 'hasAttribute( \'linkHref\' )' ).to.be.false;
  
  			// So let's simulate the `keydown` event.
  			editor.editing.view.document.fire( 'keydown', {
  				keyCode: keyCodes.arrowright,
  				preventDefault: () => {},
  				domTarget: document.body
  			} );
  
  			expect( getModelData( model ) ).to.equal( '<paragraph>foo<$text linkHref="url">[]b</$text>ar</paragraph>' );
  			// Selection should get the attributes from the right.
  			expect( selection.hasAttribute( 'linkHref' ), 'hasAttribute( \'linkHref\' )' ).to.be.true;
  			expect( selection.getAttribute( 'linkHref' ), 'linkHref attribute' ).to.equal( 'url' );
  		} );
  
  		it( 'should be bound to the `linkHref` attribute (RTL)', async () => {
  			const editor = await ClassicTestEditor.create( element, {
  				plugins: [ Paragraph, LinkEditing, Enter ],
  				language: {
  					content: 'ar'
  				}
  			} );
  
  			model = editor.model;
  			view = editor.editing.view;
  			const selection = editor.model.document.selection;
  
  			// Put selection before the link element.
  			setModelData( editor.model, '<paragraph>foo[]<$text linkHref="url">b</$text>ar</paragraph>' );
  
  			// The selection's gravity should read attributes from the left.
  			expect( selection.hasAttribute( 'linkHref' ), 'hasAttribute( \'linkHref\' )' ).to.be.false;
  
  			// So let's simulate the `keydown` event.
  			editor.editing.view.document.fire( 'keydown', {
  				keyCode: keyCodes.arrowleft,
  				preventDefault: () => {},
  				domTarget: document.body
  			} );
  
  			expect( getModelData( model ) ).to.equal( '<paragraph>foo<$text linkHref="url">[]b</$text>ar</paragraph>' );
  			// Selection should get the attributes from the right.
  			expect( selection.hasAttribute( 'linkHref' ), 'hasAttribute( \'linkHref\' )' ).to.be.true;
  			expect( selection.getAttribute( 'linkHref' ), 'linkHref attribute' ).to.equal( 'url' );
  
  			await editor.destroy();
  		} );
  	} );
  
  	// https://github.com/ckeditor/ckeditor5/issues/6053
  	describe( 'selection attribute management on paste', () => {
  		it( 'should remove link atttributes when pasting a link', () => {
  			setModelData( model, '<paragraph>foo[]</paragraph>' );
  
  			model.change( writer => {
  				model.insertContent( writer.createText( 'INSERTED', { linkHref: 'ckeditor.com' } ) );
  			} );
  
  			expect( getModelData( model ) ).to.equal( '<paragraph>foo<$text linkHref="ckeditor.com">INSERTED</$text>[]</paragraph>' );
  
  			expect( [ ...model.document.selection.getAttributeKeys() ] ).to.be.empty;
  		} );
  
  		it( 'should remove all atttributes starting with "link" (e.g. decorator attributes) when pasting a link', () => {
  			setModelData( model, '<paragraph>foo[]</paragraph>' );
  
  			model.change( writer => {
  				model.insertContent( writer.createText( 'INSERTED', { linkHref: 'ckeditor.com', linkIsExternal: true } ) );
  			} );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph>' +
  					'foo<$text linkHref="ckeditor.com" linkIsExternal="true">INSERTED</$text>[]' +
  				'</paragraph>'
  			);
  
  			expect( [ ...model.document.selection.getAttributeKeys() ] ).to.be.empty;
  		} );
  
  		it( 'should not remove link atttributes when pasting a non-link content', () => {
  			setModelData( model, '<paragraph><$text linkHref="ckeditor.com">foo[]</$text></paragraph>' );
  
  			model.change( writer => {
  				model.insertContent( writer.createText( 'INSERTED', { bold: 'true' } ) );
  			} );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph>' +
  					'<$text linkHref="ckeditor.com">foo</$text>' +
  					'<$text bold="true">INSERTED[]</$text>' +
  				'</paragraph>'
  			);
  
  			expect( [ ...model.document.selection.getAttributeKeys() ] ).to.have.members( [ 'bold' ] );
  		} );
  
  		it( 'should not remove link atttributes when pasting in the middle of a link with the same URL', () => {
  			setModelData( model, '<paragraph><$text linkHref="ckeditor.com">fo[]o</$text></paragraph>' );
  
  			model.change( writer => {
  				model.insertContent( writer.createText( 'INSERTED', { linkHref: 'ckeditor.com' } ) );
  			} );
  
  			expect( getModelData( model ) ).to.equal( '<paragraph><$text linkHref="ckeditor.com">foINSERTED[]o</$text></paragraph>' );
  			expect( [ ...model.document.selection.getAttributeKeys() ] ).to.have.members( [ 'linkHref' ] );
  		} );
  
  		it( 'should not remove link atttributes from the selection when pasting before a link when the gravity is overridden', () => {
  			setModelData( model, '<paragraph>foo[]<$text linkHref="ckeditor.com">bar</$text></paragraph>' );
  
  			view.document.fire( 'keydown', {
  				keyCode: keyCodes.arrowright,
  				preventDefault: () => {},
  				domTarget: document.body
  			} );
  
  			expect( model.document.selection.isGravityOverridden ).to.be.true;
  
  			model.change( writer => {
  				model.insertContent( writer.createText( 'INSERTED', { bold: true } ) );
  			} );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph>' +
  					'foo' +
  					'<$text bold="true">INSERTED</$text>' +
  					'<$text linkHref="ckeditor.com">[]bar</$text>' +
  				'</paragraph>'
  			);
  
  			expect( model.document.selection.isGravityOverridden ).to.be.true;
  			expect( [ ...model.document.selection.getAttributeKeys() ] ).to.have.members( [ 'linkHref' ] );
  		} );
  
  		it( 'should not remove link atttributes when pasting a link into another link (different URLs, no merge)', () => {
  			setModelData( model, '<paragraph><$text linkHref="ckeditor.com">f[]oo</$text></paragraph>' );
  
  			model.change( writer => {
  				model.insertContent( writer.createText( 'INSERTED', { linkHref: 'http://INSERTED' } ) );
  			} );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph>' +
  					'<$text linkHref="ckeditor.com">f</$text>' +
  					'<$text linkHref="http://INSERTED">INSERTED[]</$text>' +
  					'<$text linkHref="ckeditor.com">oo</$text>' +
  				'</paragraph>'
  			);
  
  			expect( [ ...model.document.selection.getAttributeKeys() ] ).to.have.members( [ 'linkHref' ] );
  		} );
  
  		it( 'should not remove link atttributes when pasting before another link (different URLs, no merge)', () => {
  			setModelData( model, '<paragraph>[]<$text linkHref="ckeditor.com">foo</$text></paragraph>' );
  
  			expect( model.document.selection.isGravityOverridden ).to.be.false;
  
  			model.change( writer => {
  				model.insertContent( writer.createText( 'INSERTED', { linkHref: 'http://INSERTED' } ) );
  			} );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph>' +
  					'<$text linkHref="http://INSERTED">INSERTED[]</$text>' +
  					'<$text linkHref="ckeditor.com">foo</$text>' +
  				'</paragraph>'
  			);
  
  			expect( [ ...model.document.selection.getAttributeKeys() ] ).to.have.members( [ 'linkHref' ] );
  			expect( model.document.selection.getAttribute( 'linkHref' ) ).to.equal( 'http://INSERTED' );
  		} );
  	} );
  
  	describe( 'command', () => {
  		it( 'should register link command', () => {
  			const command = editor.commands.get( 'link' );
  
  			expect( command ).to.be.instanceOf( LinkCommand );
  		} );
  
  		it( 'should register unlink command', () => {
  			const command = editor.commands.get( 'unlink' );
  
  			expect( command ).to.be.instanceOf( UnlinkCommand );
  		} );
  	} );
  
  	describe( 'data pipeline conversions', () => {
  		it( 'should convert `<a href="url">` to `linkHref="url"` attribute', () => {
  			editor.setData( '<p><a href="url">foo</a>bar</p>' );
  
  			expect( getModelData( model, { withoutSelection: true } ) )
  				.to.equal( '<paragraph><$text linkHref="url">foo</$text>bar</paragraph>' );
  
  			expect( editor.getData() ).to.equal( '<p><a href="url">foo</a>bar</p>' );
  		} );
  
  		it( 'should be integrated with autoparagraphing', () => {
  			editor.setData( '<a href="url">foo</a>bar' );
  
  			expect( getModelData( model, { withoutSelection: true } ) )
  				.to.equal( '<paragraph><$text linkHref="url">foo</$text>bar</paragraph>' );
  
  			expect( editor.getData() ).to.equal( '<p><a href="url">foo</a>bar</p>' );
  		} );
  
  		// https://github.com/ckeditor/ckeditor5/issues/500
  		it( 'should not pick up `<a name="foo">`', () => {
  			editor.setData( '<p><a name="foo">foo</a>bar</p>' );
  
  			expect( getModelData( model, { withoutSelection: true } ) )
  				.to.equal( '<paragraph>foobar</paragraph>' );
  		} );
  
  		// CKEditor 4 does. And CKEditor 5's balloon allows creating such links.
  		it( 'should pick up `<a href="">`', () => {
  			editor.setData( '<p><a href="">foo</a>bar</p>' );
  
  			expect( getModelData( model, { withoutSelection: true } ) )
  				.to.equal( '<paragraph><$text linkHref="">foo</$text>bar</paragraph>' );
  
  			expect( editor.getData() ).to.equal( '<p><a href="">foo</a>bar</p>' );
  		} );
  
  		// The editor's role is not to filter out potentially malicious data.
  		// Its job is to not let this code be executed inside the editor (see the test in "editing pipeline conversion").
  		it( 'should output a link with a potential XSS code', () => {
  			setModelData( model, '<paragraph>[]</paragraph>' );
  
  			model.change( writer => {
  				writer.insertText( 'foo', { linkHref: 'javascript:alert(1)' }, model.document.selection.getFirstPosition() );
  			} );
  
  			expect( editor.getData() ).to.equal( '<p><a href="javascript:alert(1)">foo</a></p>' );
  		} );
  
  		it( 'should load a link with a potential XSS code', () => {
  			editor.setData( '<p><a href="javascript:alert(1)">foo</a></p>' );
  
  			expect( getModelData( model, { withoutSelection: true } ) )
  				.to.equal( '<paragraph><$text linkHref="javascript:alert(1)">foo</$text></paragraph>' );
  		} );
  	} );
  
  	describe( 'editing pipeline conversion', () => {
  		it( 'should convert attribute', () => {
  			setModelData( model, '<paragraph><$text linkHref="url">foo</$text>bar</paragraph>' );
  
  			expect( getViewData( editor.editing.view, { withoutSelection: true } ) ).to.equal( '<p><a href="url">foo</a>bar</p>' );
  		} );
  
  		it( 'should convert to link element instance', () => {
  			setModelData( model, '<paragraph><$text linkHref="url">foo</$text>bar</paragraph>' );
  
  			const element = editor.editing.view.document.getRoot().getChild( 0 ).getChild( 0 );
  			expect( isLinkElement( element ) ).to.be.true;
  		} );
  
  		// https://github.com/ckeditor/ckeditor5-link/issues/121
  		it( 'should should set priority for `linkHref` higher than all other attribute elements', () => {
  			model.schema.extend( '$text', { allowAttributes: 'foo' } );
  
  			editor.conversion.for( 'downcast' ).attributeToElement( { model: 'foo', view: 'f' } );
  
  			setModelData( model,
  				'<paragraph>' +
  					'<$text linkHref="url">a</$text><$text foo="true" linkHref="url">b</$text><$text linkHref="url">c</$text>' +
  				'</paragraph>' );
  
  			expect( editor.getData() ).to.equal( '<p><a href="url">a<f>b</f>c</a></p>' );
  		} );
  
  		it( 'must not render a link with a potential XSS code', () => {
  			setModelData( model, '<paragraph><$text linkHref="javascript:alert(1)">[]foo</$text>bar[]</paragraph>' );
  
  			expect( getViewData( editor.editing.view, { withoutSelection: true } ) )
  				.to.equal( '<p><a href="#">foo</a>bar</p>' );
  		} );
  	} );
  
  	describe( 'link highlighting', () => {
  		it( 'should convert the highlight to a proper view classes', () => {
  			setModelData( model,
  				'<paragraph>foo <$text linkHref="url">b{}ar</$text> baz</paragraph>'
  			);
  
  			expect( model.document.selection.hasAttribute( 'linkHref' ) ).to.be.true;
  			expect( getViewData( view ) ).to.equal(
  				'<p>foo <a class="ck-link_selected" href="url">b{}ar</a> baz</p>'
  			);
  		} );
  
  		it( 'should work whenever selection has linkHref attribute - link start', () => {
  			setModelData( model,
  				'<paragraph>foo {}<$text linkHref="url">bar</$text> baz</paragraph>'
  			);
  
  			expect( model.document.selection.hasAttribute( 'linkHref' ) ).to.be.false;
  
  			model.change( writer => {
  				writer.setSelectionAttribute( 'linkHref', 'url' );
  			} );
  
  			expect( model.document.selection.hasAttribute( 'linkHref' ) ).to.be.true;
  			expect( getViewData( view ) ).to.equal(
  				'<p>foo <a class="ck-link_selected" href="url">{}bar</a> baz</p>'
  			);
  		} );
  
  		it( 'should work whenever selection has linkHref attribute - link end', () => {
  			setModelData( model,
  				'<paragraph>foo <$text linkHref="url">bar</$text>{} baz</paragraph>'
  			);
  
  			expect( model.document.selection.hasAttribute( 'linkHref' ) ).to.be.true;
  			expect( getViewData( view ) ).to.equal(
  				'<p>foo <a class="ck-link_selected" href="url">bar{}</a> baz</p>'
  			);
  		} );
  
  		it( 'should render highlight correctly after splitting the link', () => {
  			setModelData( model,
  				'<paragraph>foo <$text linkHref="url">li{}nk</$text> baz</paragraph>'
  			);
  
  			editor.execute( 'enter' );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph>foo <$text linkHref="url">li</$text></paragraph>' +
  				'<paragraph><$text linkHref="url">[]nk</$text> baz</paragraph>'
  			);
  
  			expect( model.document.selection.hasAttribute( 'linkHref' ) ).to.be.true;
  		} );
  
  		it( 'should remove classes when selection is moved out from the link', () => {
  			setModelData( model,
  				'<paragraph>foo <$text linkHref="url">li{}nk</$text> baz</paragraph>'
  			);
  
  			expect( getViewData( view ) ).to.equal(
  				'<p>foo <a class="ck-link_selected" href="url">li{}nk</a> baz</p>'
  			);
  
  			model.change( writer => writer.setSelection( model.document.getRoot().getChild( 0 ), 0 ) );
  
  			expect( getViewData( view ) ).to.equal(
  				'<p>{}foo <a href="url">link</a> baz</p>'
  			);
  		} );
  
  		it( 'should work correctly when selection is moved inside link', () => {
  			setModelData( model,
  				'<paragraph>foo <$text linkHref="url">li{}nk</$text> baz</paragraph>'
  			);
  
  			expect( getViewData( view ) ).to.equal(
  				'<p>foo <a class="ck-link_selected" href="url">li{}nk</a> baz</p>'
  			);
  
  			model.change( writer => writer.setSelection( model.document.getRoot().getChild( 0 ), 5 ) );
  
  			expect( getViewData( view ) ).to.equal(
  				'<p>foo <a class="ck-link_selected" href="url">l{}ink</a> baz</p>'
  			);
  		} );
  
  		describe( 'downcast conversion integration', () => {
  			it( 'works for the #insert event', () => {
  				setModelData( model,
  					'<paragraph>foo <$text linkHref="url">li{}nk</$text> baz</paragraph>'
  				);
  
  				model.change( writer => {
  					writer.insertText( 'FOO', { linkHref: 'url' }, model.document.selection.getFirstPosition() );
  				} );
  
  				expect( getViewData( view ) ).to.equal(
  					'<p>foo <a class="ck-link_selected" href="url">liFOO{}nk</a> baz</p>'
  				);
  			} );
  
  			it( 'works for the #remove event', () => {
  				setModelData( model,
  					'<paragraph>foo <$text linkHref="url">li{}nk</$text> baz</paragraph>'
  				);
  
  				model.change( writer => {
  					writer.remove( writer.createRange(
  						writer.createPositionAt( model.document.getRoot().getChild( 0 ), 0 ),
  						writer.createPositionAt( model.document.getRoot().getChild( 0 ), 5 )
  					) );
  				} );
  
  				expect( getViewData( view ) ).to.equal(
  					'<p><a class="ck-link_selected" href="url">i{}nk</a> baz</p>'
  				);
  			} );
  
  			it( 'works for the #attribute event', () => {
  				setModelData( model,
  					'<paragraph>foo <$text linkHref="url">li{}nk</$text> baz</paragraph>'
  				);
  
  				model.change( writer => {
  					writer.setAttribute( 'linkHref', 'new-url', writer.createRange(
  						model.document.selection.getFirstPosition().getShiftedBy( -1 ),
  						model.document.selection.getFirstPosition().getShiftedBy( 1 ) )
  					);
  				} );
  
  				expect( getViewData( view ) ).to.equal(
  					'<p>foo <a href="url">l</a><a class="ck-link_selected" href="new-url">i{}n</a><a href="url">k</a> baz</p>'
  				);
  			} );
  
  			it( 'works for the #selection event', () => {
  				setModelData( model,
  					'<paragraph>foo <$text linkHref="url">li{}nk</$text> baz</paragraph>'
  				);
  
  				model.change( writer => {
  					writer.setSelection( writer.createRange(
  						model.document.selection.getFirstPosition().getShiftedBy( -1 ),
  						model.document.selection.getFirstPosition().getShiftedBy( 1 ) )
  					);
  				} );
  
  				expect( getViewData( view ) ).to.equal(
  					'<p>foo <a class="ck-link_selected" href="url">l{in}k</a> baz</p>'
  				);
  			} );
  
  			it( 'works for the addMarker and removeMarker events', () => {
  				editor.conversion.for( 'editingDowncast' ).markerToHighlight( { model: 'fooMarker', view: {} } );
  
  				setModelData( model,
  					'<paragraph>foo <$text linkHref="url">li{}nk</$text> baz</paragraph>'
  				);
  
  				model.change( writer => {
  					const range = writer.createRange(
  						writer.createPositionAt( model.document.getRoot().getChild( 0 ), 0 ),
  						writer.createPositionAt( model.document.getRoot().getChild( 0 ), 5 )
  					);
  
  					writer.addMarker( 'fooMarker', { range, usingOperation: true } );
  				} );
  
  				expect( getViewData( view ) ).to.equal(
  					'<p><span>foo </span><a class="ck-link_selected" href="url"><span>l</span>i{}nk</a> baz</p>'
  				);
  
  				model.change( writer => writer.removeMarker( 'fooMarker' ) );
  
  				expect( getViewData( view ) ).to.equal(
  					'<p>foo <a class="ck-link_selected" href="url">li{}nk</a> baz</p>'
  				);
  			} );
  		} );
  	} );
  
  	describe( 'link attributes decorator', () => {
  		describe( 'default behavior', () => {
  			const testLinks = [
  				{
  					external: true,
  					url: 'http://example.com'
  				}, {
  					external: true,
  					url: 'https://cksource.com'
  				}, {
  					external: false,
  					url: 'ftp://server.io'
  				}, {
  					external: true,
  					url: '//schemaless.org'
  				}, {
  					external: false,
  					url: 'www.ckeditor.com'
  				}, {
  					external: false,
  					url: '/relative/url.html'
  				}, {
  					external: false,
  					url: 'another/relative/url.html'
  				}, {
  					external: false,
  					url: '#anchor'
  				}, {
  					external: false,
  					url: 'mailto:some@user.org'
  				}, {
  					external: false,
  					url: 'tel:123456789'
  				}
  			];
  			it( 'link.addTargetToExternalLinks is predefined as false value', () => {
  				expect( editor.config.get( 'link.addTargetToExternalLinks' ) ).to.be.false;
  			} );
  
  			describe( 'for link.addTargetToExternalLinks = false', () => {
  				let editor, model;
  
  				beforeEach( async () => {
  					editor = await ClassicTestEditor.create( element, {
  						plugins: [ Paragraph, LinkEditing, Enter ],
  						link: {
  							addTargetToExternalLinks: true
  						}
  					} );
  
  					model = editor.model;
  					view = editor.editing.view;
  				} );
  
  				afterEach( async () => {
  					await editor.destroy();
  				} );
  
  				it( 'link.addTargetToExternalLinks is set as true value', () => {
  					expect( editor.config.get( 'link.addTargetToExternalLinks' ) ).to.be.true;
  				} );
  
  				testLinks.forEach( link => {
  					it( `link: ${ link.url } should be treat as ${ link.external ? 'external' : 'non-external' } link`, () => {
  						editor.setData( `<p><a href="${ link.url }">foo</a>bar</p>` );
  
  						expect( getModelData( model, { withoutSelection: true } ) )
  							.to.equal( `<paragraph><$text linkHref="${ link.url }">foo</$text>bar</paragraph>` );
  
  						if ( link.external ) {
  							expect( editor.getData() )
  								.to.equal( `<p><a target="_blank" rel="noopener noreferrer" href="${ link.url }">foo</a>bar</p>` );
  						} else {
  							expect( editor.getData() ).to.equal( `<p><a href="${ link.url }">foo</a>bar</p>` );
  						}
  					} );
  				} );
  			} );
  			testLinks.forEach( link => {
  				it( `link: ${ link.url } should not get 'target' and 'rel' attributes`, () => {
  					editor.setData( `<p><a href="${ link.url }">foo</a>bar</p>` );
  
  					expect( getModelData( model, { withoutSelection: true } ) )
  						.to.equal( `<paragraph><$text linkHref="${ link.url }">foo</$text>bar</paragraph>` );
  
  					expect( editor.getData() ).to.equal( `<p><a href="${ link.url }">foo</a>bar</p>` );
  				} );
  			} );
  		} );
  
  		describe( 'custom config', () => {
  			describe( 'mode: automatic', () => {
  				const testLinks = [
  					{
  						url: 'relative/url.html',
  						attributes: {}
  					}, {
  						url: 'http://exmaple.com',
  						attributes: {
  							target: '_blank'
  						}
  					}, {
  						url: 'https://example.com/download/link.pdf',
  						attributes: {
  							target: '_blank',
  							download: 'download'
  						}
  					}, {
  						url: 'mailto:some@person.io',
  						attributes: {
  							class: 'mail-url'
  						}
  					}
  				];
  
  				beforeEach( async () => {
  					await editor.destroy();
  
  					editor = await ClassicTestEditor.create( element, {
  						plugins: [ Paragraph, LinkEditing, Enter ],
  						link: {
  							addTargetToExternalLinks: false,
  							decorators: {
  								isExternal: {
  									mode: 'automatic',
  									callback: url => url.startsWith( 'http' ),
  									attributes: {
  										target: '_blank'
  									}
  								},
  								isDownloadable: {
  									mode: 'automatic',
  									callback: url => url.includes( 'download' ),
  									attributes: {
  										download: 'download'
  									}
  								},
  								isMail: {
  									mode: 'automatic',
  									callback: url => url.startsWith( 'mailto:' ),
  									attributes: {
  										class: 'mail-url'
  									}
  								}
  							}
  						}
  					} );
  
  					model = editor.model;
  					view = editor.editing.view;
  				} );
  
  				testLinks.forEach( link => {
  					it( `Link: ${ link.url } should get attributes: ${ JSON.stringify( link.attributes ) }`, () => {
  						const ORDER = [ 'target', 'download', 'class' ];
  						const attr = Object.entries( link.attributes ).sort( ( a, b ) => {
  							const aIndex = ORDER.indexOf( a[ 0 ] );
  							const bIndex = ORDER.indexOf( b[ 0 ] );
  							return aIndex - bIndex;
  						} );
  						const reducedAttr = attr.reduce( ( acc, cur ) => {
  							return acc + `${ cur[ 0 ] }="${ cur[ 1 ] }" `;
  						}, '' );
  
  						editor.setData( `<p><a href="${ link.url }">foo</a>bar</p>` );
  
  						expect( getModelData( model, { withoutSelection: true } ) )
  							.to.equal( `<paragraph><$text linkHref="${ link.url }">foo</$text>bar</paragraph>` );
  
  						// Order of attributes is important, that's why this is assert is construct in such way.
  						expect( editor.getData() ).to.equal( `<p><a ${ reducedAttr }href="${ link.url }">foo</a>bar</p>` );
  					} );
  				} );
  			} );
  		} );
  
  		describe( 'custom linkHref converter', () => {
  			beforeEach( async () => {
  				class CustomLinks extends Plugin {
  					init() {
  						const editor = this.editor;
  
  						editor.conversion.for( 'downcast' ).add( dispatcher => {
  							dispatcher.on( 'attribute:linkHref', ( evt, data, conversionApi ) => {
  								conversionApi.consumable.consume( data.item, 'attribute:linkHref' );
  
  								// Very simplified downcast just for test assertion.
  								const viewWriter = conversionApi.writer;
  								const linkElement = viewWriter.createAttributeElement(
  									'a',
  									{
  										href: data.attributeNewValue
  									}, {
  										priority: 5
  									}
  								);
  								viewWriter.setCustomProperty( 'link', true, linkElement );
  								viewWriter.wrap( conversionApi.mapper.toViewRange( data.range ), linkElement );
  							}, { priority: 'highest' } );
  						} );
  					}
  				}
  
  				await editor.destroy();
  
  				editor = await ClassicTestEditor.create( element, {
  					plugins: [ Paragraph, LinkEditing, Enter, CustomLinks ],
  					link: {
  						addTargetToExternalLinks: true
  					}
  				} );
  
  				model = editor.model;
  				view = editor.editing.view;
  			} );
  
  			it( 'has possibility to override default one', () => {
  				editor.setData( '<p><a href="http://example.com">foo</a>bar</p>' );
  
  				expect( getModelData( model, { withoutSelection: true } ) )
  					.to.equal( '<paragraph><$text linkHref="http://example.com">foo</$text>bar</paragraph>' );
  
  				expect( editor.getData() ).to.equal( '<p><a href="http://example.com">foo</a>bar</p>' );
  			} );
  		} );
  
  		describe( 'upcast converter', () => {
  			let element, editor;
  
  			beforeEach( () => {
  				element = document.createElement( 'div' );
  				document.body.appendChild( element );
  			} );
  
  			afterEach( () => {
  				element.remove();
  			} );
  
  			it( 'should upcast attributes from initial data', async () => {
  				editor = await ClassicTestEditor.create( element, {
  					initialData: '<p><a href="url" target="_blank" rel="noopener noreferrer" download="file">Foo</a>' +
  						'<a href="example.com" download="file">Bar</a></p>',
  					plugins: [ Paragraph, LinkEditing, Enter ],
  					link: {
  						decorators: {
  							isExternal: {
  								mode: 'manual',
  								label: 'Open in a new window',
  								attributes: {
  									target: '_blank',
  									rel: 'noopener noreferrer'
  								}
  							},
  							isDownloadable: {
  								mode: 'manual',
  								label: 'Downloadable',
  								attributes: {
  									download: 'file'
  								}
  							}
  						}
  					}
  				} );
  
  				model = editor.model;
  
  				expect( getModelData( model, { withoutSelection: true } ) ).to.equal(
  					'<paragraph>' +
  						'<$text linkHref="url" linkIsDownloadable="true" linkIsExternal="true">Foo</$text>' +
  						'<$text linkHref="example.com" linkIsDownloadable="true">Bar</$text>' +
  					'</paragraph>'
  				);
  
  				await editor.destroy();
  			} );
  
  			it( 'should not upcast partial and incorrect attributes', async () => {
  				editor = await ClassicTestEditor.create( element, {
  					initialData: '<p><a href="url" target="_blank" download="something">Foo</a>' +
  						'<a href="example.com" download="test">Bar</a></p>',
  					plugins: [ Paragraph, LinkEditing, Enter ],
  					link: {
  						decorators: {
  							isExternal: {
  								mode: 'manual',
  								label: 'Open in a new window',
  								attributes: {
  									target: '_blank',
  									rel: 'noopener noreferrer'
  								}
  							},
  							isDownloadable: {
  								mode: 'manual',
  								label: 'Downloadable',
  								attributes: {
  									download: 'file'
  								}
  							}
  						}
  					}
  				} );
  
  				model = editor.model;
  
  				expect( getModelData( model, { withoutSelection: true } ) ).to.equal(
  					'<paragraph>' +
  						'<$text linkHref="url">Foo</$text>' +
  						'<$text linkHref="example.com">Bar</$text>' +
  					'</paragraph>'
  				);
  
  				await editor.destroy();
  			} );
  		} );
  	} );
  
  	// https://github.com/ckeditor/ckeditor5/issues/1016
  	describe( 'typing around the link after a click', () => {
  		let editor;
  
  		beforeEach( async () => {
  			editor = await ClassicTestEditor.create( element, {
  				plugins: [ Paragraph, LinkEditing, Enter, Input, BoldEditing ],
  				link: {
  					decorators: {
  						isFoo: {
  							mode: 'manual',
  							label: 'Foo',
  							attributes: {
  								class: 'foo'
  							}
  						},
  						isBar: {
  							mode: 'manual',
  							label: 'Bar',
  							attributes: {
  								target: '_blank'
  							}
  						}
  					}
  				}
  			} );
  
  			model = editor.model;
  			view = editor.editing.view;
  
  			model.schema.extend( '$text', {
  				allowIn: '$root',
  				allowAttributes: [ 'linkIsFoo', 'linkIsBar' ]
  			} );
  		} );
  
  		afterEach( async () => {
  			await editor.destroy();
  		} );
  
  		it( 'should insert content after the link', () => {
  			setModelData( model, '<paragraph><$text linkHref="url">Bar[]</$text></paragraph>' );
  
  			editor.editing.view.document.fire( 'mousedown' );
  			editor.editing.view.document.fire( 'selectionChange', {
  				newSelection: view.document.selection
  			} );
  
  			expect( getModelData( model ) ).to.equal( '<paragraph><$text linkHref="url">Bar</$text>[]</paragraph>' );
  
  			editor.execute( 'input', { text: 'Foo' } );
  
  			expect( getModelData( model ) ).to.equal( '<paragraph><$text linkHref="url">Bar</$text>Foo[]</paragraph>' );
  		} );
  
  		it( 'should insert content before the link', () => {
  			setModelData( model, '<paragraph><$text linkHref="url">[]Bar</$text></paragraph>' );
  
  			editor.editing.view.document.fire( 'mousedown' );
  			editor.editing.view.document.fire( 'selectionChange', {
  				newSelection: view.document.selection
  			} );
  
  			expect( getModelData( model ) ).to.equal( '<paragraph>[]<$text linkHref="url">Bar</$text></paragraph>' );
  
  			editor.execute( 'input', { text: 'Foo' } );
  
  			expect( getModelData( model ) ).to.equal( '<paragraph>Foo[]<$text linkHref="url">Bar</$text></paragraph>' );
  		} );
  
  		it( 'should insert content to the link if clicked inside it', () => {
  			setModelData( model, '<paragraph><$text linkHref="url">B[]ar</$text></paragraph>' );
  
  			editor.editing.view.document.fire( 'mousedown' );
  			editor.editing.view.document.fire( 'selectionChange', {
  				newSelection: view.document.selection
  			} );
  
  			expect( getModelData( model ) ).to.equal( '<paragraph><$text linkHref="url">B[]ar</$text></paragraph>' );
  
  			editor.execute( 'input', { text: 'ar. B' } );
  
  			expect( getModelData( model ) ).to.equal( '<paragraph><$text linkHref="url">Bar. B[]ar</$text></paragraph>' );
  		} );
  
  		it( 'should insert content between two links (selection at the end of the first link)', () => {
  			setModelData( model, '<paragraph><$text linkHref="foo">Foo[]</$text><$text linkHref="bar">Bar</$text></paragraph>' );
  
  			editor.editing.view.document.fire( 'mousedown' );
  			editor.editing.view.document.fire( 'selectionChange', {
  				newSelection: view.document.selection
  			} );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph><$text linkHref="foo">Foo</$text>[]<$text linkHref="bar">Bar</$text></paragraph>'
  			);
  
  			editor.execute( 'input', { text: 'Foo' } );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph><$text linkHref="foo">Foo</$text>Foo[]<$text linkHref="bar">Bar</$text></paragraph>'
  			);
  		} );
  
  		it( 'should insert content between two links (selection at the beginning of the second link)', () => {
  			setModelData( model, '<paragraph><$text linkHref="foo">Foo</$text><$text linkHref="bar">[]Bar</$text></paragraph>' );
  
  			editor.editing.view.document.fire( 'mousedown' );
  			editor.editing.view.document.fire( 'selectionChange', {
  				newSelection: view.document.selection
  			} );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph><$text linkHref="foo">Foo</$text>[]<$text linkHref="bar">Bar</$text></paragraph>'
  			);
  
  			editor.execute( 'input', { text: 'Foo' } );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph><$text linkHref="foo">Foo</$text>Foo[]<$text linkHref="bar">Bar</$text></paragraph>'
  			);
  		} );
  
  		it( 'should not touch other attributes than `linkHref`', () => {
  			setModelData( model, '<paragraph><$text bold="true" linkHref="url">Bar[]</$text></paragraph>' );
  
  			editor.editing.view.document.fire( 'mousedown' );
  			editor.editing.view.document.fire( 'selectionChange', {
  				newSelection: view.document.selection
  			} );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph><$text bold="true" linkHref="url">Bar</$text><$text bold="true">[]</$text></paragraph>'
  			);
  
  			editor.execute( 'input', { text: 'Foo' } );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph><$text bold="true" linkHref="url">Bar</$text><$text bold="true">Foo[]</$text></paragraph>'
  			);
  		} );
  
  		it( 'should do nothing if the text was not clicked', () => {
  			setModelData( model, '<paragraph><$text linkHref="url">Bar[]</$text></paragraph>' );
  
  			editor.editing.view.document.fire( 'selectionChange', {
  				newSelection: view.document.selection
  			} );
  
  			expect( getModelData( model ) ).to.equal( '<paragraph><$text linkHref="url">Bar[]</$text></paragraph>' );
  		} );
  
  		it( 'should do nothing if the selection is not collapsed after the click', () => {
  			setModelData( model, '<paragraph>[<$text linkHref="url">Bar</$text>]</paragraph>' );
  
  			editor.editing.view.document.fire( 'mousedown' );
  			editor.editing.view.document.fire( 'selectionChange', {
  				newSelection: view.document.selection
  			} );
  
  			expect( getModelData( model ) ).to.equal( '<paragraph>[<$text linkHref="url">Bar</$text>]</paragraph>' );
  		} );
  
  		it( 'should do nothing if the text is not a link', () => {
  			setModelData( model, '<paragraph><$text bold="true">Bar[]</$text></paragraph>' );
  
  			editor.editing.view.document.fire( 'mousedown' );
  			editor.editing.view.document.fire( 'selectionChange', {
  				newSelection: view.document.selection
  			} );
  
  			expect( getModelData( model ) ).to.equal( '<paragraph><$text bold="true">Bar[]</$text></paragraph>' );
  		} );
  
  		it( 'should remove manual decorators', () => {
  			setModelData( model, '<paragraph><$text linkIsFoo="true" linkIsBar="true" linkHref="url">Bar[]</$text></paragraph>' );
  
  			editor.editing.view.document.fire( 'mousedown' );
  			editor.editing.view.document.fire( 'selectionChange', {
  				newSelection: view.document.selection
  			} );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph><$text linkHref="url" linkIsBar="true" linkIsFoo="true">Bar</$text>[]</paragraph>'
  			);
  
  			editor.execute( 'input', { text: 'Foo' } );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph><$text linkHref="url" linkIsBar="true" linkIsFoo="true">Bar</$text>Foo[]</paragraph>'
  			);
  		} );
  	} );
  
  	// https://github.com/ckeditor/ckeditor5/issues/4762
  	describe( 'typing over the link', () => {
  		let editor;
  
  		beforeEach( async () => {
  			editor = await ClassicTestEditor.create( element, {
  				plugins: [ Paragraph, LinkEditing, Enter, BoldEditing, ItalicEditing, ImageEditing ],
  				link: {
  					decorators: {
  						isFoo: {
  							mode: 'manual',
  							label: 'Foo',
  							attributes: {
  								class: 'foo'
  							}
  						},
  						isBar: {
  							mode: 'manual',
  							label: 'Bar',
  							attributes: {
  								target: '_blank'
  							}
  						}
  					}
  				}
  			} );
  
  			model = editor.model;
  			view = editor.editing.view;
  
  			model.schema.extend( '$text', {
  				allowIn: '$root',
  				allowAttributes: [ 'linkIsFoo', 'linkIsBar' ]
  			} );
  		} );
  
  		afterEach( async () => {
  			await editor.destroy();
  		} );
  
  		it( 'should require Clipboard plugin', () => {
  			expect( LinkEditing.requires.includes( Clipboard ) ).to.equal( true );
  		} );
  
  		it( 'should require Input plugin', () => {
  			expect( LinkEditing.requires.includes( Input ) ).to.equal( true );
  		} );
  
  		it( 'should preserve selection attributes when the entire link is selected', () => {
  			setModelData( model,
  				'<paragraph>This is [<$text linkHref="foo">Foo</$text>] from <$text linkHref="bar">Bar</$text>.</paragraph>'
  			);
  
  			editor.execute( 'input', {
  				text: 'Abcde'
  			} );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph>This is <$text linkHref="foo">Abcde</$text>[] from <$text linkHref="bar">Bar</$text>.</paragraph>'
  			);
  		} );
  
  		it( 'should preserve selection attributes when the entire link is selected (mixed attributes in the link)', () => {
  			setModelData( model,
  				'<paragraph>' +
  					'This is [' +
  					'<$text linkHref="foo" italic="true">F</$text>' +
  					'<$text linkHref="foo" bold="true">o</$text>' +
  					'<$text linkHref="foo" bold="true" italic="true">o</$text>' +
  					'<$text linkHref="foo" bold="true">B</$text>' +
  					'<$text linkHref="foo" bold="true" italic="true">a</$text>' +
  					'<$text linkHref="foo">r</$text>]' +
  					' from ' +
  					'<$text linkHref="bar">Bar</$text>' +
  					'.' +
  				'</paragraph>'
  			);
  
  			editor.execute( 'input', {
  				text: 'Abcde'
  			} );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph>' +
  					'This is ' +
  					'<$text italic="true" linkHref="foo">Abcde</$text>' +
  					'<$text italic="true">[]</$text>' +
  					' from ' +
  					'<$text linkHref="bar">Bar</$text>' +
  					'.' +
  				'</paragraph>'
  			);
  		} );
  
  		it( 'should preserve selection attributes when the selection starts at the beginning of the link', () => {
  			setModelData( model,
  				'<paragraph>This is [<$text linkHref="foo">Fo]o</$text> from <$text linkHref="bar">Bar</$text>.</paragraph>'
  			);
  
  			editor.execute( 'input', {
  				text: 'Abcde'
  			} );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph>This is <$text linkHref="foo">Abcde[]o</$text> from <$text linkHref="bar">Bar</$text>.</paragraph>'
  			);
  		} );
  
  		it( 'should preserve selection attributes when it starts at the beginning of the link (mixed attributes in the link)', () => {
  			setModelData( model,
  				'<paragraph>' +
  					'This is [' +
  					'<$text linkHref="foo" italic="true">F</$text>' +
  					'<$text linkHref="foo" bold="true">o</$text>' +
  					'<$text linkHref="foo" bold="true" italic="true">o</$text>' +
  					'<$text linkHref="foo" bold="true">B</$text>' +
  					'<$text linkHref="foo" bold="true" italic="true">a]</$text>' +
  					'<$text linkHref="foo">r</$text>' +
  					' from ' +
  					'<$text linkHref="bar">Bar</$text>' +
  					'.' +
  				'</paragraph>'
  			);
  
  			editor.execute( 'input', {
  				text: 'Abcde'
  			} );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph>' +
  					'This is ' +
  					'<$text italic="true" linkHref="foo">Abcde[]</$text>' +
  					'<$text linkHref="foo">r</$text>' +
  					' from ' +
  					'<$text linkHref="bar">Bar</$text>' +
  					'.' +
  				'</paragraph>'
  			);
  		} );
  
  		it( 'should preserve all attributes of the link node (decorators check)', () => {
  			setModelData( model,
  				'<paragraph>' +
  					'This is ' +
  					'<$text linkIsFoo="true" linkIsBar="true" linkHref="foo">[Foo]</$text>' +
  					' from ' +
  					'<$text linkHref="bar">Bar</$text>' +
  					'.' +
  				'</paragraph>'
  			);
  
  			editor.execute( 'input', {
  				text: 'Abcde'
  			} );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph>' +
  					'This is ' +
  					'<$text linkHref="foo" linkIsBar="true" linkIsFoo="true">Abcde</$text>[]' +
  					' from ' +
  					'<$text linkHref="bar">Bar</$text>' +
  					'.' +
  				'</paragraph>'
  			);
  		} );
  
  		it( 'should not preserve selection attributes when the changes are not caused by typing', () => {
  			setModelData( model,
  				'<paragraph>This is [<$text linkHref="foo">Foo</$text>] from <$text linkHref="bar">Bar</$text>.</paragraph>'
  			);
  
  			model.change( writer => {
  				model.deleteContent( model.document.selection );
  				model.insertContent( writer.createText( 'Abcde' ) );
  			} );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph>This is Abcde[] from <$text linkHref="bar">Bar</$text>.</paragraph>'
  			);
  		} );
  
  		it( 'should not preserve selection attributes when the changes are not caused by typing (pasting check)', () => {
  			setModelData( model,
  				'<paragraph>This is [<$text linkHref="foo">Foo</$text>] from <$text linkHref="bar">Bar</$text>.</paragraph>'
  			);
  
  			view.document.fire( 'paste', {
  				dataTransfer: createDataTransfer( {
  					'text/html': '<p>Abcde</p>',
  					'text/plain': 'Abcde'
  				} ),
  				preventDefault: sinon.spy(),
  				stopPropagation: sinon.spy()
  			} );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph>This is Abcde[] from <$text linkHref="bar">Bar</$text>.</paragraph>'
  			);
  		} );
  
  		it( 'should not preserve selection attributes when typed after cutting the content', () => {
  			setModelData( model,
  				'<paragraph>This is [<$text linkHref="foo">Foo</$text>] from <$text linkHref="bar">Bar</$text>.</paragraph>'
  			);
  
  			view.document.fire( 'cut', {
  				dataTransfer: createDataTransfer(),
  				preventDefault: sinon.spy(),
  				stopPropagation: sinon.spy()
  			} );
  
  			editor.execute( 'input', {
  				text: 'Abcde'
  			} );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph>This is Abcde[] from <$text linkHref="bar">Bar</$text>.</paragraph>'
  			);
  		} );
  
  		it( 'should not preserve anything if selected an element instead of text', () => {
  			setModelData( model,
  				'[<image src="/assets/sample.png"></image>]'
  			);
  
  			editor.execute( 'input', {
  				text: 'Abcde'
  			} );
  
  			expect( getModelData( model ) ).to.equal(
  				'Abcde[]'
  			);
  		} );
  
  		it( 'should not preserve anything if selected text does not have the `linkHref` attribute`', () => {
  			setModelData( model,
  				'<paragraph>This is [<$text bold="foo">Foo</$text>] from <$text linkHref="bar">Bar</$text>.</paragraph>'
  			);
  
  			editor.execute( 'input', {
  				text: 'Abcde'
  			} );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph>This is Abcde[] from <$text linkHref="bar">Bar</$text>.</paragraph>'
  			);
  		} );
  
  		it( 'should not preserve selection attributes when the entire link is selected and pressed "Backspace"', () => {
  			setModelData( model,
  				'<paragraph>This is [<$text linkHref="foo">Foo</$text>] from <$text linkHref="bar">Bar</$text>.</paragraph>'
  			);
  
  			view.document.fire( 'delete', new DomEventData( view.document, {
  				keyCode: keyCodes.backspace,
  				preventDefault: () => {}
  			} ) );
  
  			editor.execute( 'input', {
  				text: 'Abcde'
  			} );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph>This is Abcde[] from <$text linkHref="bar">Bar</$text>.</paragraph>'
  			);
  		} );
  
  		it( 'should not preserve selection attributes when the entire link is selected and pressed "Delete"', () => {
  			setModelData( model,
  				'<paragraph>This is [<$text linkHref="foo">Foo</$text>] from <$text linkHref="bar">Bar</$text>.</paragraph>'
  			);
  
  			view.document.fire( 'delete', new DomEventData( view.document, {
  				keyCode: keyCodes.delete,
  				preventDefault: () => {}
  			} ) );
  
  			editor.execute( 'input', {
  				text: 'Abcde'
  			} );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph>This is Abcde[] from <$text linkHref="bar">Bar</$text>.</paragraph>'
  			);
  		} );
  
  		it( 'should not preserve selection attributes when selected different links', () => {
  			setModelData( model,
  				'<paragraph>This is <$text linkHref="foo">[Foo</$text> from <$text linkHref="bar">Bar]</$text>.</paragraph>'
  			);
  
  			editor.execute( 'input', {
  				text: 'Abcde'
  			} );
  
  			expect( getModelData( model ) ).to.equal( '<paragraph>This is Abcde[].</paragraph>' );
  		} );
  
  		it( 'should not preserve selection attributes when selected more than single link (start of the selection)', () => {
  			setModelData( model,
  				'<paragraph>This is[ <$text linkHref="foo">Foo]</$text> from <$text linkHref="bar">Bar</$text>.</paragraph>'
  			);
  
  			editor.execute( 'input', {
  				text: 'Abcde'
  			} );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph>This isAbcde[] from <$text linkHref="bar">Bar</$text>.</paragraph>'
  			);
  		} );
  
  		it( 'should not preserve selection attributes when selected more than single link (end of the selection)', () => {
  			setModelData( model,
  				'<paragraph>This is <$text linkHref="foo">[Foo</$text> ]from <$text linkHref="bar">Bar</$text>.</paragraph>'
  			);
  
  			editor.execute( 'input', {
  				text: 'Abcde'
  			} );
  
  			expect( getModelData( model ) ).to.equal(
  				'<paragraph>This is Abcde[]from <$text linkHref="bar">Bar</$text>.</paragraph>'
  			);
  		} );
  
  		function createDataTransfer( data ) {
  			return {
  				getData( type ) {
  					return data[ type ];
  				},
  				setData() {}
  			};
  		}
  	} );
  } );
  