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+/**
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+ * @license Copyright (c) 2003-2016, CKSource - Frederico Knabben. All rights reserved.
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+ * For licensing, see LICENSE.md.
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+ */
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+
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+/* bender-tags: treemodel */
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+
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+'use strict';
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+
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+import NodeList from '/ckeditor5/engine/treemodel/nodelist.js';
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+import Element from '/ckeditor5/engine/treemodel/element.js';
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+import DocumentFragment from '/ckeditor5/engine/treemodel/documentfragment.js';
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+
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+describe( 'DocumentFragment', () => {
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+ describe( 'constructor', () => {
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+ it( 'should create empty document fragment', () => {
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+ let frag = new DocumentFragment();
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+
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+ expect( frag.getChildCount() ).to.equal( 0 );
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+ } );
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+
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+ it( 'should create document fragment with children', () => {
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+ let frag = new DocumentFragment( [ 'x', new Element( 'p' ), 'y' ] );
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+
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+ expect( frag.getChildCount() ).to.equal( 3 );
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+ expect( frag.getChild( 0 ) ).to.have.property( 'character' ).that.equals( 'x' );
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+ expect( frag.getChild( 1 ) ).to.have.property( 'name' ).that.equals( 'p' );
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+ expect( frag.getChild( 2 ) ).to.have.property( 'character' ).that.equals( 'y' );
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+ } );
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+ } );
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+
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+ describe( 'insertChildren', () => {
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+ it( 'should add children to the document fragment', () => {
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+ let frag = new DocumentFragment( 'xy' );
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+ frag.insertChildren( 1, 'foo' );
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+
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+ expect( frag.getChildCount() ).to.equal( 5 );
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+ expect( frag.getChild( 0 ) ).to.have.property( 'character' ).that.equals( 'x' );
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+ expect( frag.getChild( 1 ) ).to.have.property( 'character' ).that.equals( 'f' );
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+ expect( frag.getChild( 2 ) ).to.have.property( 'character' ).that.equals( 'o' );
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+ expect( frag.getChild( 3 ) ).to.have.property( 'character' ).that.equals( 'o' );
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+ expect( frag.getChild( 4 ) ).to.have.property( 'character' ).that.equals( 'y' );
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+ } );
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+
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+ it( 'should accept DocumentFragment as a parameter and clean it after it is added', () => {
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+ let p1 = new Element( 'p' );
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+ let p2 = new Element( 'p' );
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+ let otherFrag = new DocumentFragment( [ p1, p2 ] );
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+
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+ let frag = new DocumentFragment();
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+
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+ frag.insertChildren( 0, otherFrag );
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+
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+ expect( frag.getChildCount() ).to.equal( 2 );
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+ expect( frag.getChild( 0 ) ).to.equal( p1 );
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+ expect( frag.getChild( 1 ) ).to.equal( p2 );
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+ expect( otherFrag.getChildCount() ).to.equal( 0 );
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+ } );
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+ } );
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+
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+ describe( 'appendChildren', () => {
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+ it( 'should add children to the end of the element', () => {
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+ let frag = new DocumentFragment( 'xy' );
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+ frag.appendChildren( 'foo' );
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+
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+ expect( frag.getChildCount() ).to.equal( 5 );
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+ expect( frag.getChild( 0 ) ).to.have.property( 'character' ).that.equals( 'x' );
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+ expect( frag.getChild( 1 ) ).to.have.property( 'character' ).that.equals( 'y' );
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+ expect( frag.getChild( 2 ) ).to.have.property( 'character' ).that.equals( 'f' );
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+ expect( frag.getChild( 3 ) ).to.have.property( 'character' ).that.equals( 'o' );
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+ expect( frag.getChild( 4 ) ).to.have.property( 'character' ).that.equals( 'o' );
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+ } );
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+ } );
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+
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+ describe( 'removeChildren', () => {
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+ it( 'should remove children from the element and return them as a NodeList', () => {
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+ let frag = new DocumentFragment( 'foobar' );
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+ let removed = frag.removeChildren( 2, 3 );
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+
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+ expect( frag.getChildCount() ).to.equal( 3 );
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+ expect( frag.getChild( 0 ) ).to.have.property( 'character' ).that.equals( 'f' );
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+ expect( frag.getChild( 1 ) ).to.have.property( 'character' ).that.equals( 'o' );
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+ expect( frag.getChild( 2 ) ).to.have.property( 'character' ).that.equals( 'r' );
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+
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+ expect( removed ).to.be.instanceof( NodeList );
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+ expect( removed.length ).to.equal( 3 );
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+
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+ expect( removed.get( 0 ).character ).to.equal( 'o' );
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+ expect( removed.get( 1 ).character ).to.equal( 'b' );
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+ expect( removed.get( 2 ).character ).to.equal( 'a' );
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+ } );
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+
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+ it( 'should remove one child when second parameter is not specified', () => {
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+ let frag = new DocumentFragment( 'foo' );
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+ let removed = frag.removeChildren( 2 );
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+
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+ expect( frag.getChildCount() ).to.equal( 2 );
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+ expect( frag.getChild( 0 ) ).to.have.property( 'character' ).that.equals( 'f' );
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+ expect( frag.getChild( 1 ) ).to.have.property( 'character' ).that.equals( 'o' );
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+
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+ expect( removed ).to.be.instanceof( NodeList );
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+ expect( removed.length ).to.equal( 1 );
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+
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+ expect( removed.get( 0 ).character ).to.equal( 'o' );
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+ } );
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+ } );
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+
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+ describe( 'getChildIndex', () => {
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+ it( 'should return child index', () => {
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+ let frag = new DocumentFragment( [ new Element( 'p' ), 'bar', new Element( 'h' ) ] );
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+ let p = frag.getChild( 0 );
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+ let b = frag.getChild( 1 );
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+ let a = frag.getChild( 2 );
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+ let r = frag.getChild( 3 );
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+ let h = frag.getChild( 4 );
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+
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+ expect( frag.getChildIndex( p ) ).to.equal( 0 );
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+ expect( frag.getChildIndex( b ) ).to.equal( 1 );
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+ expect( frag.getChildIndex( a ) ).to.equal( 2 );
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+ expect( frag.getChildIndex( r ) ).to.equal( 3 );
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+ expect( frag.getChildIndex( h ) ).to.equal( 4 );
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+ } );
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+ } );
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+
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+ describe( 'getChildCount', () => {
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+ it( 'should return number of children', () => {
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+ let frag = new DocumentFragment( 'bar' );
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+
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+ expect( frag.getChildCount() ).to.equal( 3 );
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+ } );
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+ } );
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+} );
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