text: /**
   * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.
   * For licensing, see LICENSE.md.
   */
  
  import AttributeCommand from '../src/attributecommand';
  
  import ModelTestEditor from '@ckeditor/ckeditor5-core/tests/_utils/modeltesteditor';
  
  import Document from '@ckeditor/ckeditor5-engine/src/model/document';
  import Batch from '@ckeditor/ckeditor5-engine/src/model/batch';
  import Range from '@ckeditor/ckeditor5-engine/src/model/range';
  import Position from '@ckeditor/ckeditor5-engine/src/model/position';
  import { setData, getData } from '@ckeditor/ckeditor5-engine/src/dev-utils/model';
  
  describe( 'AttributeCommand', () => {
  	const attrKey = 'bold';
  	let editor, command, doc, root;
  
  	beforeEach( () => {
  		return ModelTestEditor
  			.create()
  			.then( newEditor => {
  				editor = newEditor;
  				doc = editor.document;
  				root = doc.getRoot();
  
  				command = new AttributeCommand( editor, attrKey );
  
  				doc.schema.registerItem( 'p', '$block' );
  				doc.schema.registerItem( 'h1', '$block' );
  				doc.schema.registerItem( 'img', '$inline' );
  				doc.schema.objects.add( 'img' );
  
  				// Allow block in "root" (DIV)
  				doc.schema.allow( { name: '$block', inside: '$root' } );
  
  				// Bold text is allowed only in P.
  				doc.schema.allow( { name: '$text', attributes: 'bold', inside: 'p' } );
  				doc.schema.allow( { name: 'p', attributes: 'bold', inside: '$root' } );
  
  				// Disallow bold on image.
  				doc.schema.disallow( { name: 'img', attributes: 'bold', inside: '$root' } );
  			} );
  	} );
  
  	afterEach( () => {
  		command.destroy();
  
  		return editor.destroy();
  	} );
  
  	describe( 'value', () => {
  		it( 'is true when selection has the attribute', () => {
  			doc.enqueueChanges( () => {
  				doc.selection.setAttribute( attrKey, true );
  			} );
  
  			expect( command.value ).to.be.true;
  		} );
  
  		it( 'is false when selection does not have the attribute', () => {
  			doc.enqueueChanges( () => {
  				doc.selection.removeAttribute( attrKey );
  			} );
  
  			expect( command.value ).to.be.false;
  		} );
  
  		// See https://github.com/ckeditor/ckeditor5-core/issues/73#issuecomment-311572827.
  		it( 'is false when selection contains object with nested editable', () => {
  			doc.schema.registerItem( 'caption', '$block' );
  			doc.schema.allow( { name: '$inline', inside: 'caption' } );
  			doc.schema.allow( { name: 'caption', inside: 'img' } );
  			doc.schema.allow( { name: '$text', attributes: 'bold', inside: 'caption' } );
  
  			setData( doc, '<p>[<img><caption>Some caption inside the image.</caption></img>]</p>' );
  
  			expect( command.value ).to.be.false;
  			command.execute();
  			expect( command.value ).to.be.false;
  
  			expect( getData( doc ) ).to.equal(
  				'<p>[<img><caption><$text bold="true">Some caption inside the image.</$text></caption></img>]</p>'
  			);
  		} );
  	} );
  
  	describe( 'isEnabled', () => {
  		// This test doesn't tests every possible case.
  		// Method `refresh()` uses `checkAttributeInSelection()` which is fully tested in its own test.
  
  		beforeEach( () => {
  			doc.schema.registerItem( 'x', '$block' );
  			doc.schema.disallow( { name: '$text', inside: 'x', attributes: 'link' } );
  		} );
  
  		describe( 'when selection is collapsed', () => {
  			it( 'should return true if characters with the attribute can be placed at caret position', () => {
  				setData( doc, '<p>f[]oo</p>' );
  				expect( command.isEnabled ).to.be.true;
  			} );
  
  			it( 'should return false if characters with the attribute cannot be placed at caret position', () => {
  				setData( doc, '<x>fo[]o</x>' );
  				expect( command.isEnabled ).to.be.false;
  			} );
  		} );
  
  		describe( 'when selection is not collapsed', () => {
  			it( 'should return true if there is at least one node in selection that can have the attribute', () => {
  				setData( doc, '<p>[foo]</p>' );
  				expect( command.isEnabled ).to.be.true;
  			} );
  
  			it( 'should return false if there are no nodes in selection that can have the attribute', () => {
  				setData( doc, '<x>[foo]</x>' );
  				expect( command.isEnabled ).to.be.false;
  			} );
  		} );
  	} );
  
  	describe( 'execute()', () => {
  		it( 'should do nothing if the command is disabled', () => {
  			setData( doc, '<p>fo[ob]ar</p>' );
  
  			command.isEnabled = false;
  
  			command.execute();
  
  			expect( getData( doc ) ).to.equal( '<p>fo[ob]ar</p>' );
  		} );
  
  		it( 'should add attribute on selected nodes if the command value was false', () => {
  			setData( doc, '<p>a[bc<$text bold="true">fo]obar</$text>xyz</p>' );
  
  			expect( command.value ).to.be.false;
  
  			command.execute();
  
  			expect( command.value ).to.be.true;
  			expect( getData( doc ) ).to.equal( '<p>a[<$text bold="true">bcfo]obar</$text>xyz</p>' );
  		} );
  
  		it( 'should remove attribute from selected nodes if the command value was true', () => {
  			setData( doc, '<p>abc[<$text bold="true">foo]bar</$text>xyz</p>' );
  
  			expect( command.value ).to.be.true;
  
  			command.execute();
  
  			expect( getData( doc ) ).to.equal( '<p>abc[foo]<$text bold="true">bar</$text>xyz</p>' );
  			expect( command.value ).to.be.false;
  		} );
  
  		it( 'should add attribute on selected nodes if execute parameter was set to true', () => {
  			setData( doc, '<p>abc<$text bold="true">foob[ar</$text>x]yz</p>' );
  
  			expect( command.value ).to.be.true;
  
  			command.execute( { forceValue: true } );
  
  			expect( command.value ).to.be.true;
  			expect( getData( doc ) ).to.equal( '<p>abc<$text bold="true">foob[arx</$text>]yz</p>' );
  		} );
  
  		it( 'should remove attribute on selected nodes if execute parameter was set to false', () => {
  			setData( doc, '<p>a[bc<$text bold="true">fo]obar</$text>xyz</p>' );
  
  			command.execute( { forceValue: false } );
  
  			expect( command.value ).to.be.false;
  			expect( getData( doc ) ).to.equal( '<p>a[bcfo]<$text bold="true">obar</$text>xyz</p>' );
  		} );
  
  		it( 'should change selection attribute if selection is collapsed in non-empty parent', () => {
  			setData( doc, '<p>a[]bc<$text bold="true">foobar</$text>xyz</p><p></p>' );
  
  			expect( command.value ).to.be.false;
  
  			command.execute();
  
  			expect( command.value ).to.be.true;
  			expect( doc.selection.hasAttribute( 'bold' ) ).to.be.true;
  
  			command.execute();
  
  			expect( command.value ).to.be.false;
  			expect( doc.selection.hasAttribute( 'bold' ) ).to.be.false;
  		} );
  
  		it( 'should not store attribute change on selection if selection is collapsed in non-empty parent', () => {
  			setData( doc, '<p>a[]bc<$text bold="true">foobar</$text>xyz</p>' );
  
  			command.execute();
  
  			// It should not save that bold was executed at position ( root, [ 0, 1 ] ).
  
  			doc.enqueueChanges( () => {
  				// Simulate clicking right arrow key by changing selection ranges.
  				doc.selection.setRanges( [ new Range( new Position( root, [ 0, 2 ] ), new Position( root, [ 0, 2 ] ) ) ] );
  
  				// Get back to previous selection.
  				doc.selection.setRanges( [ new Range( new Position( root, [ 0, 1 ] ), new Position( root, [ 0, 1 ] ) ) ] );
  			} );
  
  			expect( command.value ).to.be.false;
  		} );
  
  		it( 'should change selection attribute and store it if selection is collapsed in empty parent', () => {
  			setData( doc, '<p>abc<$text bold="true">foobar</$text>xyz</p><p>[]</p>' );
  
  			expect( command.value ).to.be.false;
  
  			command.execute();
  
  			expect( command.value ).to.be.true;
  			expect( doc.selection.hasAttribute( 'bold' ) ).to.be.true;
  
  			// Attribute should be stored.
  			// Simulate clicking somewhere else in the editor.
  			doc.enqueueChanges( () => {
  				doc.selection.setRanges( [ new Range( new Position( root, [ 0, 2 ] ), new Position( root, [ 0, 2 ] ) ) ] );
  			} );
  
  			expect( command.value ).to.be.false;
  
  			// Go back to where attribute was stored.
  			doc.enqueueChanges( () => {
  				doc.selection.setRanges( [ new Range( new Position( root, [ 1, 0 ] ), new Position( root, [ 1, 0 ] ) ) ] );
  			} );
  
  			// Attribute should be restored.
  			expect( command.value ).to.be.true;
  
  			command.execute();
  
  			expect( command.value ).to.be.false;
  			expect( doc.selection.hasAttribute( 'bold' ) ).to.be.false;
  		} );
  
  		it( 'should not apply attribute change where it would invalid schema', () => {
  			doc.schema.registerItem( 'image', '$block' );
  			setData( doc, '<p>ab[c<img></img><$text bold="true">foobar</$text>xy<img></img>]z</p>' );
  
  			expect( command.isEnabled ).to.be.true;
  
  			command.execute();
  
  			expect( getData( doc ) )
  				.to.equal( '<p>ab[<$text bold="true">c</$text><img></img><$text bold="true">foobarxy</$text><img></img>]z</p>' );
  		} );
  
  		it( 'should use provided batch for storing undo steps', () => {
  			const batch = new Batch( new Document() );
  			setData( doc, '<p>a[bc<$text bold="true">fo]obar</$text>xyz</p>' );
  
  			expect( batch.deltas.length ).to.equal( 0 );
  
  			command.execute( { batch } );
  
  			expect( batch.deltas.length ).to.equal( 1 );
  			expect( getData( doc ) ).to.equal( '<p>a[<$text bold="true">bcfo]obar</$text>xyz</p>' );
  		} );
  
  		describe( 'should cause firing model document changesDone event', () => {
  			let spy;
  
  			beforeEach( () => {
  				spy = sinon.spy();
  			} );
  
  			it( 'collapsed selection in non-empty parent', () => {
  				setData( doc, '<p>x[]y</p>' );
  
  				doc.on( 'changesDone', spy );
  
  				command.execute();
  
  				expect( spy.calledOnce ).to.be.true;
  			} );
  
  			it( 'non-collapsed selection', () => {
  				setData( doc, '<p>[xy]</p>' );
  
  				doc.on( 'changesDone', spy );
  
  				command.execute();
  
  				expect( spy.calledOnce ).to.be.true;
  			} );
  
  			it( 'in empty parent', () => {
  				setData( doc, '<p>[]</p>' );
  
  				doc.on( 'changesDone', spy );
  
  				command.execute();
  
  				expect( spy.calledOnce ).to.be.true;
  			} );
  		} );
  	} );
  } );
  