text: /**
   * @license Copyright (c) 2003-2021, CKSource - Frederico Knabben. All rights reserved.
   * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
   */
  
  import ModelTestEditor from '@ckeditor/ckeditor5-core/tests/_utils/modeltesteditor';
  import { setData, getData } from '@ckeditor/ckeditor5-engine/src/dev-utils/model';
  
  import IndentBlockCommand from '../src/indentblockcommand';
  import IndentUsingClasses from '../src/indentcommandbehavior/indentusingclasses';
  import IndentUsingOffset from '../src/indentcommandbehavior/indentusingoffset';
  
  describe( 'IndentBlockCommand', () => {
  	let editor, command, model;
  
  	beforeEach( () => {
  		return ModelTestEditor
  			.create()
  			.then( newEditor => {
  				editor = newEditor;
  				model = editor.model;
  
  				model.schema.register( 'parentBlock', {
  					allowWhere: '$block',
  					isLimit: true,
  					isObject: true,
  					isBlock: true
  				} );
  
  				model.schema.register( 'paragraph', {
  					inheritAllFrom: '$block',
  					allowAttributes: [ 'blockIndent' ],
  					allowIn: 'parentBlock'
  				} );
  
  				model.schema.register( 'block', {
  					inheritAllFrom: '$block'
  				} );
  			} );
  	} );
  
  	afterEach( () => {
  		command.destroy();
  
  		return editor.destroy();
  	} );
  
  	describe( 'common behavior', () => {
  		let indentBehavior;
  
  		beforeEach( () => {
  			indentBehavior = {
  				checkEnabled: sinon.stub().returns( true ),
  				getNextIndent: sinon.stub()
  			};
  
  			command = new IndentBlockCommand( editor, indentBehavior );
  		} );
  
  		describe( 'refresh()', () => {
  			it( 'should be disabled if a top-most block disallows indentBlock attribute', () => {
  				setData( model, '[<parentBlock><paragraph>foo</paragraph></parentBlock>]' );
  				command.refresh();
  				expect( command.isEnabled ).to.be.false;
  			} );
  		} );
  
  		describe( 'execute()', () => {
  			it( 'should be executed for all selected blocks', () => {
  				setData( model,
  					'<paragraph>f[oo</paragraph>' +
  					'<paragraph>foo</paragraph>' +
  					'<paragraph>f]oo</paragraph>'
  				);
  				command.execute();
  				sinon.assert.calledThrice( indentBehavior.getNextIndent );
  			} );
  
  			it( 'should be executed only for blocks that can have indentBlock attribute', () => {
  				setData( model,
  					'<paragraph>f[oo</paragraph>' +
  					'<block>foo</block>' +
  					'<paragraph>f]oo</paragraph>'
  				);
  				command.execute();
  				sinon.assert.calledTwice( indentBehavior.getNextIndent );
  			} );
  
  			it( 'should be executed only for top-most blocks that can have indentBlock attribute', () => {
  				setData( model,
  					'<paragraph>f[oo</paragraph>' +
  					'<parentBlock><paragraph>foo</paragraph><paragraph>foo</paragraph></parentBlock>' +
  					'<paragraph>f]oo</paragraph>'
  				);
  				command.execute();
  				sinon.assert.calledTwice( indentBehavior.getNextIndent );
  			} );
  		} );
  	} );
  
  	describe( 'indent', () => {
  		describe( 'using classes', () => {
  			beforeEach( () => {
  				command = new IndentBlockCommand( editor, new IndentUsingClasses( {
  					classes: [
  						'indent-1',
  						'indent-2',
  						'indent-3',
  						'indent-4'
  					],
  					direction: 'forward'
  				} ) );
  			} );
  
  			describe( 'isEnabled', () => {
  				it( 'should be false in block that does not support indent', () => {
  					setData( model, '<block>f[]oo</block>' );
  					expect( command.isEnabled ).to.be.false;
  				} );
  
  				it( 'should be true in non-indented block', () => {
  					setData( model, '<paragraph>f[]oo</paragraph>' );
  					expect( command.isEnabled ).to.be.true;
  				} );
  
  				it( 'should be true in indented block and there are still indentation classes', () => {
  					setData( model, '<paragraph blockIndent="indent-2">f[]oo</paragraph>' );
  					expect( command.isEnabled ).to.be.true;
  				} );
  
  				it( 'should be false in indented block in last indentation class', () => {
  					setData( model, '<paragraph blockIndent="indent-4">f[]oo</paragraph>' );
  					expect( command.isEnabled ).to.be.false;
  				} );
  			} );
  
  			describe( 'execute()', () => {
  				it( 'should set first indent class for non-indented block', () => {
  					setData( model, '<paragraph>f[]oo</paragraph>' );
  					command.execute();
  					expect( getData( model ) ).to.equal( '<paragraph blockIndent="indent-1">f[]oo</paragraph>' );
  				} );
  
  				it( 'should set next indent class for indented block', () => {
  					setData( model, '<paragraph blockIndent="indent-2">f[]oo</paragraph>' );
  					command.execute();
  					expect( getData( model ) ).to.equal( '<paragraph blockIndent="indent-3">f[]oo</paragraph>' );
  				} );
  
  				it( 'should be executed only for top-most blocks that can have indentBlock attribute', () => {
  					setData( model,
  						'<paragraph>f[oo</paragraph>' +
  						'<parentBlock><paragraph>foo</paragraph><paragraph>foo</paragraph></parentBlock>' +
  						'<paragraph>f]oo</paragraph>'
  					);
  					command.execute();
  					expect( getData( model ) ).to.equal(
  						'<paragraph blockIndent="indent-1">f[oo</paragraph>' +
  						'<parentBlock><paragraph>foo</paragraph><paragraph>foo</paragraph></parentBlock>' +
  						'<paragraph blockIndent="indent-1">f]oo</paragraph>'
  					);
  				} );
  			} );
  		} );
  
  		describe( 'using offset', () => {
  			beforeEach( () => {
  				command = new IndentBlockCommand( editor, new IndentUsingOffset( {
  					offset: 50,
  					unit: 'px',
  					direction: 'forward'
  				} ) );
  			} );
  
  			describe( 'isEnabled', () => {
  				it( 'should be false in block that does not support indent', () => {
  					setData( model, '<block>f[]oo</block>' );
  					expect( command.isEnabled ).to.be.false;
  				} );
  
  				it( 'should be true in non-indented block', () => {
  					setData( model, '<paragraph>f[]oo</paragraph>' );
  					expect( command.isEnabled ).to.be.true;
  				} );
  
  				it( 'should be true in indented block', () => {
  					setData( model, '<paragraph blockIndent="50px">f[]oo</paragraph>' );
  					expect( command.isEnabled ).to.be.true;
  				} );
  
  				it( 'should be true in indented block with different unit', () => {
  					setData( model, '<paragraph blockIndent="2em">f[]oo</paragraph>' );
  					expect( command.isEnabled ).to.be.true;
  				} );
  			} );
  
  			describe( 'execute()', () => {
  				it( 'should set first offset for non-indented block', () => {
  					setData( model, '<paragraph>f[]oo</paragraph>' );
  					command.execute();
  					expect( getData( model ) ).to.equal( '<paragraph blockIndent="50px">f[]oo</paragraph>' );
  				} );
  
  				it( 'should calculate next offset for indented block', () => {
  					setData( model, '<paragraph blockIndent="100px">f[]oo</paragraph>' );
  					command.execute();
  					expect( getData( model ) ).to.equal( '<paragraph blockIndent="150px">f[]oo</paragraph>' );
  				} );
  
  				it( 'should calculate next offset for indented block even if current indent is not tied to offset', () => {
  					setData( model, '<paragraph blockIndent="27px">f[]oo</paragraph>' );
  					command.execute();
  					expect( getData( model ) ).to.equal( '<paragraph blockIndent="77px">f[]oo</paragraph>' );
  				} );
  
  				it( 'should set first offset if current indent has different unit', () => {
  					setData( model, '<paragraph blockIndent="3mm">f[]oo</paragraph>' );
  					command.execute();
  					expect( getData( model ) ).to.equal( '<paragraph blockIndent="50px">f[]oo</paragraph>' );
  				} );
  			} );
  		} );
  	} );
  
  	describe( 'outdent', () => {
  		describe( 'using classes', () => {
  			beforeEach( () => {
  				command = new IndentBlockCommand( editor, new IndentUsingClasses( {
  					classes: [
  						'indent-1',
  						'indent-2',
  						'indent-3',
  						'indent-4'
  					],
  					direction: 'backward'
  				} ) );
  			} );
  
  			describe( 'isEnabled', () => {
  				it( 'should be false in block that does not support indent', () => {
  					setData( model, '<block>f[]oo</block>' );
  					expect( command.isEnabled ).to.be.false;
  				} );
  
  				it( 'should be false in non-indented block', () => {
  					setData( model, '<paragraph>f[]oo</paragraph>' );
  					expect( command.isEnabled ).to.be.false;
  				} );
  
  				it( 'should be true in indented block onf first indentation class', () => {
  					setData( model, '<paragraph blockIndent="indent-1">f[]oo</paragraph>' );
  					expect( command.isEnabled ).to.be.true;
  				} );
  
  				it( 'should be true in indented block and there are still indentation classes', () => {
  					setData( model, '<paragraph blockIndent="indent-2">f[]oo</paragraph>' );
  					expect( command.isEnabled ).to.be.true;
  				} );
  
  				it( 'should be true in indented block in last indentation class', () => {
  					setData( model, '<paragraph blockIndent="indent-4">f[]oo</paragraph>' );
  					expect( command.isEnabled ).to.be.true;
  				} );
  			} );
  
  			describe( 'execute()', () => {
  				it( 'should set previous indent class for indented block', () => {
  					setData( model, '<paragraph blockIndent="indent-2">f[]oo</paragraph>' );
  					command.execute();
  					expect( getData( model ) ).to.equal( '<paragraph blockIndent="indent-1">f[]oo</paragraph>' );
  				} );
  			} );
  		} );
  
  		describe( 'using offset', () => {
  			beforeEach( () => {
  				command = new IndentBlockCommand( editor, new IndentUsingOffset( {
  					offset: 50,
  					unit: 'px',
  					direction: 'backward'
  				} ) );
  			} );
  
  			describe( 'isEnabled', () => {
  				it( 'should be false in block that does not support indent', () => {
  					setData( model, '<block>f[]oo</block>' );
  					expect( command.isEnabled ).to.be.false;
  				} );
  
  				it( 'should be false in non-indented block', () => {
  					setData( model, '<paragraph>f[]oo</paragraph>' );
  					expect( command.isEnabled ).to.be.false;
  				} );
  
  				it( 'should be true in indented block', () => {
  					setData( model, '<paragraph blockIndent="50px">f[]oo</paragraph>' );
  					expect( command.isEnabled ).to.be.true;
  				} );
  
  				it( 'should be true in indented block with different unit', () => {
  					setData( model, '<paragraph blockIndent="2em">f[]oo</paragraph>' );
  					expect( command.isEnabled ).to.be.true;
  				} );
  			} );
  
  			describe( 'execute()', () => {
  				it( 'should set remove offset if indent is on first offset', () => {
  					setData( model, '<paragraph blockIndent="50px">f[]oo</paragraph>' );
  					command.execute();
  					expect( getData( model ) ).to.equal( '<paragraph>f[]oo</paragraph>' );
  				} );
  
  				it( 'should calculate next offset for indented block', () => {
  					setData( model, '<paragraph blockIndent="100px">f[]oo</paragraph>' );
  					command.execute();
  					expect( getData( model ) ).to.equal( '<paragraph blockIndent="50px">f[]oo</paragraph>' );
  				} );
  
  				it( 'should calculate next offset for indented block even if current indent is not tied to offset', () => {
  					setData( model, '<paragraph blockIndent="92px">f[]oo</paragraph>' );
  					command.execute();
  					expect( getData( model ) ).to.equal( '<paragraph blockIndent="42px">f[]oo</paragraph>' );
  				} );
  
  				it( 'should remove offset if current indent has different unit', () => {
  					setData( model, '<paragraph blockIndent="3mm">f[]oo</paragraph>' );
  					command.execute();
  					expect( getData( model ) ).to.equal( '<paragraph>f[]oo</paragraph>' );
  				} );
  			} );
  		} );
  	} );
  } );
  