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+/**
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+ * @license Copyright (c) 2003-2015, 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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+/* globals describe, it, before, expect, bender */
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+
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+/* jshint expr: true */
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+
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+/* bender-tags: document */
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+
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+'use strict';
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+
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+var modules = bender.amd.require(
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+ 'document/element',
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+ 'document/character' );
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+
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+describe( 'tree', function() {
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+ var Element, Character;
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+
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+ var root;
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+ var one, two, three;
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+ var charB, charA, charR, img;
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+
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+ before( function() {
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+ Element = modules[ 'document/element' ];
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+ Character = modules[ 'document/character' ];
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+
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+ root = new Element();
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+
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+ one = new Element( root );
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+ two = new Element( root );
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+ three = new Element( root );
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+
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+ charB = new Character( two, 'b' );
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+ charA = new Character( two, 'a' );
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+ img = new Element( two, 'img' );
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+ charR = new Character( two, 'r' );
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+
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+ two.children.push( charB );
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+ two.children.push( charA );
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+ two.children.push( img );
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+ two.children.push( charR );
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+
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+ root.children.push( one );
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+ root.children.push( two );
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+ root.children.push( three );
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+ } );
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+
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+ it( 'should have proper depth', function() {
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+ expect( root ).to.have.property( 'depth' ).that.equals( 0 );
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+
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+ expect( one ).to.have.property( 'depth' ).that.equals( 1 );
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+ expect( two ).to.have.property( 'depth' ).that.equals( 1 );
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+ expect( three ).to.have.property( 'depth' ).that.equals( 1 );
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+
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+ expect( charB ).to.have.property( 'depth' ).that.equals( 2 );
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+ expect( charA ).to.have.property( 'depth' ).that.equals( 2 );
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+ expect( img ).to.have.property( 'depth' ).that.equals( 2 );
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+ expect( charR ).to.have.property( 'depth' ).that.equals( 2 );
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+ } );
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+
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+ it( 'should have proper nextSibling', function() {
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+ expect( root ).to.have.property( 'nextSibling' ).that.is.null;
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+
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+ expect( one ).to.have.property( 'nextSibling' ).that.equals( two );
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+ expect( two ).to.have.property( 'nextSibling' ).that.equals( three );
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+ expect( three ).to.have.property( 'nextSibling' ).that.is.null;
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+
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+ expect( charB ).to.have.property( 'nextSibling' ).that.equals( charA );
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+ expect( charA ).to.have.property( 'nextSibling' ).that.equals( img );
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+ expect( img ).to.have.property( 'nextSibling' ).that.equals( charR );
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+ expect( charR ).to.have.property( 'nextSibling' ).that.is.null;
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+ } );
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+
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+ it( 'should have proper previousSibling', function() {
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+ expect( root ).to.have.property( 'previousSibling' ).that.is.expect;
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+
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+ expect( one ).to.have.property( 'previousSibling' ).that.is.null;
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+ expect( two ).to.have.property( 'previousSibling' ).that.equals( one );
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+ expect( three ).to.have.property( 'previousSibling' ).that.equals( two );
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+
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+ expect( charB ).to.have.property( 'previousSibling' ).that.is.null;
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+ expect( charA ).to.have.property( 'previousSibling' ).that.equals( charB );
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+ expect( img ).to.have.property( 'previousSibling' ).that.equals( charA );
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+ expect( charR ).to.have.property( 'previousSibling' ).that.equals( img );
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+ } );
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+} );
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