src/smartxml/smartxml.test.js

   1 define([
   2     'libs/chai',
   3     'libs/sinon',
   4     'libs/underscore',
   5     './smartxml.js'
   6 ], function(chai, sinon, _, smartxml) {
   7
   8 'use strict';
   9 /*jshint expr:true */
  10 /* global describe, it, beforeEach, Node, DOMParser */
  11
  12 var expect = chai.expect;
  13
  14
  15 var getDocumentFromXML = function(xml) {
  16     return smartxml.documentFromXML(xml);
  17 };
  18
  19 var elementNodeFromParams = function(params) {
  20     return smartxml.elementNodeFromXML('<' + params.tag + '></' + params.tag + '>');
  21 };
  22
  23 var elementNodeFromXML = function(xml) {
  24     return smartxml.elementNodeFromXML(xml);
  25 };
  26
  27
  28 describe('smartxml', function() {
  29
  30     describe('Basic Document properties', function() {
  31         it('exposes its root element', function() {
  32             var doc = getDocumentFromXML('<div></div>');
  33             expect(doc.root.getTagName()).to.equal('div');
  34         });
  35
  36         it('can resets its content entirely', function() {
  37             var doc = getDocumentFromXML('<div></div>');
  38
  39             expect(doc.root.getTagName()).to.equal('div');
  40
  41             doc.loadXML('<header></header>');
  42             expect(doc.root.getTagName()).to.equal('header');
  43         });
  44
  45         it('knows if it contains an ElementNode in its tree', function() {
  46             var doc = getDocumentFromXML('<root><a></a>text</root>'),
  47                 root = doc.root,
  48                 a = root.contents()[0],
  49                 text = root.contents()[1];
  50
  51             expect(doc.containsNode(root)).to.equal(true, 'contains its root');
  52             expect(doc.containsNode(a)).to.equal(true, 'contains Element Node');
  53             expect(doc.containsNode(text)).to.equal(true, 'contains Text Node');
  54         });
  55
  56         it('creates text nodes', function() {
  57             var doc = getDocumentFromXML('<div></div>'),
  58                 emptyTextNode = doc.createDocumentNode({text:''}),
  59                 nonEmptyTextNode = doc.createDocumentNode({text: 'alice'});
  60             expect(emptyTextNode.getText()).to.equal('', 'empty ok');
  61             expect(nonEmptyTextNode.getText()).to.equal('alice', 'non empty ok');
  62         });
  63
  64         it('creates nodes from xml strings', function() {
  65             var doc = getDocumentFromXML('<div></div>'),
  66                 node = doc.createDocumentNode('<a>Alice<b></b></a>');
  67             expect(node.getTagName()).to.equal('a');
  68             expect(node.contents().length).to.equal(2);
  69             expect(node.contents()[0].getText()).to.equal('Alice');
  70             expect(node.contents()[1].getTagName()).to.equal('b');
  71         });
  72     });
  73
  74     describe('DocumentNode', function() {
  75         it('can be cloned', function() {
  76             var doc = getDocumentFromXML('<div>Alice</div>'),
  77                 text = doc.root.contents()[0],
  78                 clone, suffix;
  79
  80             [doc.root, text].forEach(function(node) {
  81                 suffix = ' (' + (node.nodeType === Node.TEXT_NODE ? 'text' : 'element')  + ')';
  82                 clone = node.clone();
  83                 expect(doc.containsNode(clone)).to.equal(false, 'clone is not contained in a document' + suffix);
  84                 expect(node.sameNode(clone)).to.equal(false, 'clone is not same node as its originator' + suffix);
  85                 expect(node.nativeNode.isEqualNode(clone.nativeNode)).to.equal(true, 'clone is identical as its originator' + suffix);
  86             });
  87         });
  88
  89         it('can be cloned with its contents and its contents data', function() {
  90             var doc = getDocumentFromXML('<root><div></div></root>'),
  91                 root = doc.root,
  92                 div = root.contents()[0];
  93
  94             var ClonableObject = function(arg) {
  95                 this.arg = arg;
  96             };
  97             ClonableObject.prototype.clone = function() {
  98                 return new ClonableObject(this.arg);
  99             };
 100
 101             div.setData('key', 'value');
 102             div.setData('clonableObject', new ClonableObject('test'));
 103
 104             var rootClone = root.clone(),
 105                 divClone = rootClone.contents()[0],
 106                 stringClone = divClone.getData('key'),
 107                 objClone = divClone.getData('clonableObject');
 108
 109             expect(stringClone).to.equal('value');
 110             expect(objClone.arg).to.equal('test', 'clonable object got copied');
 111             expect(objClone !== div.getData('clonableObject')).to.be.equal(true, 'copy of the clonable object is a new object');
 112         });
 113
 114         it('knows its path in the document tree', function() {
 115             var doc = getDocumentFromXML('<root><a><b><c></c>text</b></a></root>'),
 116                 root = doc.root,
 117                 a = root.contents()[0],
 118                 b = a.contents()[0],
 119                 text = b.contents()[1];
 120
 121             expect(root.getPath()).to.eql([], 'path of the root element is empty');
 122             expect(a.getPath()).to.eql([0]);
 123             expect(b.getPath()).to.eql([0, 0]);
 124             expect(text.getPath()).to.eql([0,0,1]);
 125
 126             /* Paths relative to a given ancestor */
 127             expect(text.getPath(root)).to.eql([0,0,1]);
 128             expect(text.getPath(a)).to.eql([0,1]);
 129             expect(text.getPath(b)).to.eql([1]);
 130         });
 131     });
 132
 133     describe('Basic ElementNode properties', function() {
 134         it('exposes node contents', function() {
 135             var node = elementNodeFromXML('<node>Some<node>text</node>is here</node>'),
 136                 contents = node.contents();
 137
 138             expect(contents).to.have.length(3);
 139             expect(contents[0].nodeType).to.equal(Node.TEXT_NODE, 'text node 1');
 140             expect(contents[1].nodeType).to.equal(Node.ELEMENT_NODE, 'element node 1');
 141             expect(contents[2].nodeType).to.equal(Node.TEXT_NODE, 'text node 2');
 142         });
 143
 144         describe('Storing custom data', function() {
 145             var node;
 146
 147             beforeEach(function() {
 148                 node = elementNodeFromXML('<div></div>');
 149             });
 150
 151             it('can append single value', function() {
 152                 node.setData('key', 'value');
 153                 expect(node.getData('key')).to.equal('value');
 154             });
 155
 156             it('can overwrite the whole data', function() {
 157                 node.setData('key1', 'value1');
 158                 node.setData({key2: 'value2'});
 159                 expect(node.getData('key2')).to.equal('value2');
 160             });
 161
 162             it('can fetch the whole data at once', function() {
 163                 node.setData({key1: 'value1', key2: 'value2'});
 164                 expect(node.getData()).to.eql({key1: 'value1', key2: 'value2'});
 165             });
 166
 167             it('can remove specific data', function() {
 168                 node.setData('key', 'value');
 169                 node.setData('key', undefined);
 170                 expect(node.getData('key')).to.be.undefined;
 171             });
 172         });
 173
 174         describe('Changing node tag', function() {
 175
 176             it('can change tag name', function() {
 177                 var node = elementNodeFromXML('<div></div>');
 178                 node = node.setTag('span');
 179                 expect(node.getTagName()).to.equal('span');
 180             });
 181
 182             describe('Implementation specific expectations', function() {
 183                 it('keeps custom data', function() {
 184                     var node = elementNodeFromXML('<div></div>');
 185
 186                     node.setData('key', 'value');
 187                     node = node.setTag('header');
 188
 189                     expect(node.getTagName()).to.equal('header');
 190                     expect(node.getData()).to.eql({key: 'value'});
 191                 });
 192
 193                 it('can change document root tag name', function() {
 194                     var doc = getDocumentFromXML('<div></div>');
 195                     doc.root.setTag('span');
 196                     expect(doc.root.getTagName()).to.equal('span');
 197                 });
 198
 199                 it('keeps node contents', function() {
 200                     var node = elementNodeFromXML('<div><div></div></div>');
 201                     node = node.setTag('header');
 202                     expect(node.contents()).to.have.length(1);
 203                 });
 204             });
 205         });
 206
 207         describe('Setting node attributes', function() {
 208             it('can set node attribute', function() {
 209                 var node = elementNodeFromXML('<div></div>');
 210
 211                 node.setAttr('key', 'value');
 212                 expect(node.getAttr('key')).to.equal('value');
 213             });
 214             it('emits nodeAttrChange event', function() {
 215                 var node = elementNodeFromXML('<div key="value1"></div>'),
 216                     spy = sinon.spy();
 217
 218                 node.document.on('change', spy);
 219                 node.setAttr('key', 'value2');
 220                 var event = spy.args[0][0];
 221
 222                 expect(event.type).to.equal('nodeAttrChange');
 223                 expect(event.meta.node.sameNode(node)).to.be.true;
 224                 expect(event.meta.attr).to.equal('key');
 225                 expect(event.meta.oldVal).to.equal('value1');
 226             });
 227         });
 228
 229         describe('Searching for the last child text node', function() {
 230             [
 231                 '<div>xxx<div></div>last</div>',
 232                 '<div><div>last</div></div>',
 233                 '<div>xxx<div>last</div><div></div></div>'
 234             ].forEach(function(xml, i) {
 235                 var example = 'example ' + i;
 236                 it('returns last child text node ' + example + ')', function() {
 237                     var doc = getDocumentFromXML(xml),
 238                         lastTextNode = doc.root.getLastTextNode();
 239                     expect(lastTextNode.getText()).to.equal('last', example);
 240                 });
 241             });
 242         });
 243
 244         describe('Putting nodes around', function() {
 245             it('will not allow to put node before or after root node', function() {
 246                 var doc = getDocumentFromXML('<root></root>'),
 247                     spy = sinon.spy(),
 248                     root = doc.root,
 249                     result;
 250
 251                 doc.on('change', spy);
 252
 253                 result = doc.root.before({tagName: 'test'});
 254
 255                 expect(spy.callCount).to.equal(0);
 256                 expect(result).to.undefined;
 257
 258                 result = doc.root.after({tagName: 'test'});
 259
 260                 expect(spy.callCount).to.equal(0);
 261                 expect(result).to.undefined;
 262
 263                 expect(doc.root.sameNode(root));
 264             });
 265         });
 266     });
 267
 268     describe('Basic TextNode properties', function() {
 269         it('can have its text set', function() {
 270             var node = elementNodeFromXML('<div>Alice</div>'),
 271                 textNode = node.contents()[0];
 272
 273             textNode.setText('Cat');
 274             expect(textNode.getText()).to.equal('Cat');
 275         });
 276
 277         it('emits nodeTextChange', function() {
 278             var node = elementNodeFromXML('<div>Alice</div>'),
 279                 textNode = node.contents()[0],
 280                 spy = sinon.spy();
 281
 282             textNode.document.on('change', spy);
 283             textNode.setText('Cat');
 284
 285             var event = spy.args[0][0];
 286             expect(event.type).to.equal('nodeTextChange');
 287         });
 288
 289         it('puts NodeElement after itself', function() {
 290             var node = elementNodeFromXML('<div>Alice</div>'),
 291                 textNode = node.contents()[0],
 292                 returned = textNode.after({tagName:'div'});
 293             expect(returned.sameNode(node.contents()[1])).to.be.true;
 294         });
 295
 296         it('puts NodeElement before itself', function() {
 297             var node = elementNodeFromXML('<div>Alice</div>'),
 298                 textNode = node.contents()[0],
 299                 returned = textNode.before({tagName:'div'});
 300             expect(returned.sameNode(node.contents()[0])).to.be.true;
 301         });
 302
 303         describe('Wrapping TextNode contents', function() {
 304
 305             it('wraps DocumentTextElement', function() {
 306                 var node = elementNodeFromXML('<section>Alice</section>'),
 307                     textNode = node.contents()[0];
 308
 309                 var returned = textNode.wrapWith({tagName: 'header'}),
 310                     parent = textNode.parent(),
 311                     parent2 = node.contents()[0];
 312
 313                 expect(returned.sameNode(parent)).to.be.equal(true, 'wrapper is a parent');
 314                 expect(returned.sameNode(parent2)).to.be.equal(true, 'wrapper has a correct parent');
 315                 expect(returned.getTagName()).to.equal('header');
 316             });
 317
 318             describe('wrapping part of DocumentTextElement', function() {
 319                 [{start: 5, end: 12}, {start: 12, end: 5}].forEach(function(offsets) {
 320                     it('wraps in the middle ' + offsets.start + '/' + offsets.end, function() {
 321                         var node = elementNodeFromXML('<section>Alice has a cat</section>'),
 322                             textNode = node.contents()[0];
 323
 324                         var returned = textNode.wrapWith({tagName: 'header', attrs: {'attr1': 'value1'}, start: offsets.start, end: offsets.end}),
 325                             contents = node.contents();
 326
 327                         expect(contents.length).to.equal(3);
 328
 329                         expect(contents[0].nodeType).to.be.equal(Node.TEXT_NODE, 'first node is text node');
 330                         expect(contents[0].getText()).to.equal('Alice');
 331
 332                         expect(contents[1].sameNode(returned)).to.be.true;
 333                         expect(returned.getTagName()).to.equal('header');
 334                         expect(returned.getAttr('attr1')).to.equal('value1');
 335                         expect(contents[1].contents().length).to.equal(1, 'wrapper has one node inside');
 336                         expect(contents[1].contents()[0].getText()).to.equal(' has a ');
 337
 338                         expect(contents[2].nodeType).to.be.equal(Node.TEXT_NODE, 'third node is text node');
 339                         expect(contents[2].getText()).to.equal('cat');
 340                     });
 341                 });
 342
 343                 it('wraps whole text inside DocumentTextElement if offsets span entire content', function() {
 344                     var node = elementNodeFromXML('<section>Alice has a cat</section>'),
 345                          textNode = node.contents()[0];
 346
 347                     textNode.wrapWith({tagName: 'header', start: 0, end: 15});
 348
 349                     var contents = node.contents();
 350                     expect(contents.length).to.equal(1);
 351                     expect(contents[0].getTagName()).to.equal('header');
 352                     expect(contents[0].contents()[0].getText()).to.equal('Alice has a cat');
 353                 });
 354             });
 355         });
 356
 357         describe('Dividing text node into two with element node', function() {
 358                 it('can divide text node with element node, splitting text node into two', function() {
 359                     var doc = getDocumentFromXML('<div>Alice has a cat</div>'),
 360                         text = doc.root.contents()[0];
 361
 362                     var returned = text.divideWithElementNode({tagName: 'aside'}, {offset: 5}),
 363                         contents = doc.root.contents(),
 364                         lhsText = contents[0],
 365                         rhsText = contents[2];
 366
 367                     expect(lhsText.getText()).to.equal('Alice');
 368                     expect(returned.sameNode(contents[1]));
 369                     expect(rhsText.getText()).to.equal(' has a cat');
 370                 });
 371
 372                 it('treats dividing at the very end as appending after it', function() {
 373                     var doc = getDocumentFromXML('<div>Alice has a cat</div>'),
 374                         text = doc.root.contents()[0];
 375
 376
 377                     var returned = text.divideWithElementNode({tagName: 'aside'}, {offset: 15}),
 378                         contents = doc.root.contents(),
 379                         textNode = contents[0],
 380                         elementNode = contents[1];
 381
 382                     expect(contents.length).to.equal(2);
 383                     expect(textNode.getText()).to.equal('Alice has a cat');
 384                     expect(returned.sameNode(elementNode)).to.be.true;
 385                     expect(elementNode.getTagName()).to.equal('aside');
 386                 });
 387
 388                 it('treats dividing at the very beginning as prepending before it', function() {
 389                     var doc = getDocumentFromXML('<div>Alice has a cat</div>'),
 390                         text = doc.root.contents()[0];
 391
 392                     var returned = text.divideWithElementNode({tagName: 'aside'}, {offset: 0}),
 393                         contents = doc.root.contents(),
 394                         textNode = contents[1],
 395                         elementNode = contents[0];
 396
 397                     expect(contents.length).to.equal(2);
 398                     expect(textNode.getText()).to.equal('Alice has a cat');
 399                     expect(returned.sameNode(elementNode)).to.be.true;
 400                     expect(elementNode.getTagName()).to.equal('aside');
 401                 });
 402         });
 403     });
 404
 405     describe('Manipulations', function() {
 406
 407         describe('detaching nodes', function() {
 408             it('can detach document root node', function() {
 409                 var doc = getDocumentFromXML('<div></div>');
 410
 411                 doc.root.detach();
 412                 expect(doc.root).to.equal(null);
 413             });
 414         });
 415
 416         describe('replacing node with another one', function() {
 417             it('replaces node with another one', function() {
 418                 var doc = getDocumentFromXML('<div><a></a></div>'),
 419                     a = doc.root.contents()[0];
 420
 421                 var c = a.replaceWith({tagName: 'b', attrs: {b:'1'}});
 422
 423                 expect(doc.root.contents()[0].sameNode(c));
 424                 expect(c.getTagName()).to.equal('b');
 425                 expect(c.getAttr('b')).to.equal('1');
 426             });
 427             it('can replace document root', function() {
 428                 var doc = getDocumentFromXML('<div></div>');
 429
 430                 var header = doc.root.replaceWith({tagName: 'header'});
 431
 432                 expect(doc.root.sameNode(header)).to.be.true;
 433                 expect(doc.containsNode(header)).to.be.true;
 434             });
 435         });
 436
 437         it('merges adjacent text nodes resulting from detaching an element node in between', function() {
 438             var doc = getDocumentFromXML('<div>Alice <span>has</span>a cat</div>'),
 439                 span = doc.root.contents()[1];
 440
 441             span.detach();
 442
 443             var rootContents = doc.root.contents();
 444             expect(rootContents).to.have.length(1, 'one child left');
 445             expect(rootContents[0].getText()).to.equal('Alice a cat');
 446         });
 447
 448         it('merges adjacent text nodes resulting from moving an element node in between', function() {
 449             var doc = getDocumentFromXML('<div><a></a>Alice <span>has</span>a cat</div>'),
 450                 span = doc.root.contents()[2],
 451                 a = doc.root.contents()[0];
 452
 453             a.append(span);
 454
 455             var rootContents = doc.root.contents();
 456             expect(rootContents).to.have.length(2, 'one child left');
 457             expect(rootContents[1].getText()).to.equal('Alice a cat');
 458         });
 459
 460         it('inserts node at index', function() {
 461             var doc = getDocumentFromXML('<div><a></a><b></b><c></c></div>'),
 462                 b = doc.root.contents()[1];
 463
 464             var inserted = doc.root.insertAtIndex({tagName: 'test'}, 1);
 465
 466             expect(doc.root.contents()[1].sameNode(inserted)).to.equal(true, 'inserted node returned');
 467             expect(b.getIndex()).to.equal(2, 'b node shifted right');
 468         });
 469
 470         it('appends node when inserting node at index out of range', function() {
 471             var doc = getDocumentFromXML('<div></div>');
 472
 473             var test1 = doc.root.insertAtIndex({tagName: 'test1'}, 0),
 474                 test2 = doc.root.insertAtIndex({tagName: 'test1'}, 10);
 475
 476             expect(doc.root.contents()[0].sameNode(test1)).to.equal(true, 'inserting at index 0 of empty nodes appends node');
 477             expect(doc.root.contents().length).to.equal(1, 'inserting at index out of range does nothing');
 478             expect(test2).to.equal(undefined, 'inserting at index out of range returns undefined');
 479         });
 480
 481         it('appends element node to another element node', function() {
 482             var node1 = elementNodeFromParams({tag: 'div'}),
 483                 node2 = elementNodeFromParams({tag: 'a'}),
 484                 node3 = elementNodeFromParams({tag: 'p'});
 485             node1.append(node2);
 486             node1.append(node3);
 487             expect(node1.contents()[0].sameNode(node2)).to.be.true;
 488             expect(node1.contents()[1].sameNode(node3)).to.be.true;
 489         });
 490
 491         it('prepends element node to another element node', function() {
 492             var node1 = elementNodeFromParams({tag: 'div'}),
 493                 node2 = elementNodeFromParams({tag: 'a'}),
 494                 node3 = elementNodeFromParams({tag: 'p'});
 495             node1.prepend(node2);
 496             node1.prepend(node3);
 497             expect(node1.contents()[0].sameNode(node3)).to.be.true;
 498             expect(node1.contents()[1].sameNode(node2)).to.be.true;
 499         });
 500
 501         describe('adding text nodes', function() {
 502             it('merges text nodes on append', function() {
 503                 var doc = getDocumentFromXML('<root>text1</root>'),
 504                     returned;
 505                 returned = doc.root.append({text: 'text2'});
 506                 expect(doc.root.contents().length).to.equal(1);
 507                 expect(returned.sameNode(doc.root.contents()[0])).to.equal(true, 'modified node returned');
 508                 expect(doc.root.contents()[0].getText()).to.equal('text1text2');
 509             });
 510
 511             it('merges text nodes on prepend', function() {
 512                 var doc = getDocumentFromXML('<root>text1</root>'),
 513                     returned;
 514                 returned = doc.root.prepend({text: 'text2'});
 515                 expect(doc.root.contents().length).to.equal(1);
 516                 expect(returned.sameNode(doc.root.contents()[0])).to.equal(true, 'modified node returned');
 517                 expect(doc.root.contents()[0].getText()).to.equal('text2text1');
 518             });
 519
 520             it('merges text nodes on before text node', function() {
 521                 var doc = getDocumentFromXML('<root>text1</root>'),
 522                     textNode = doc.root.contents()[0],
 523                     returned;
 524                 returned = textNode.before({text: 'text2'});
 525                 expect(doc.root.contents().length).to.equal(1);
 526                 expect(returned.sameNode(doc.root.contents()[0])).to.equal(true, 'modified node returned');
 527                 expect(doc.root.contents()[0].getText()).to.equal('text2text1');
 528             });
 529
 530             it('merges text nodes on after text node', function() {
 531                 var doc = getDocumentFromXML('<root>text1</root>'),
 532                     textNode = doc.root.contents()[0],
 533                     returned;
 534                 returned = textNode.after({text: 'text2'});
 535                 expect(doc.root.contents().length).to.equal(1);
 536                 expect(returned.sameNode(doc.root.contents()[0])).to.equal(true, 'modified node returned');
 537                 expect(doc.root.contents()[0].getText()).to.equal('text1text2');
 538             });
 539
 540             it('merges text nodes on before element node', function() {
 541                 var doc = getDocumentFromXML('<root>text1<div></div></root>'),
 542                     textNode = doc.root.contents()[0],
 543                     div = doc.root.contents()[1],
 544                     returned;
 545                 returned = div.before({text: 'text2'});
 546                 expect(doc.root.contents().length).to.equal(2);
 547                 expect(returned.sameNode(doc.root.contents()[0])).to.equal(true, 'modified node returned');
 548                 expect(textNode.getText()).to.equal('text1text2');
 549             });
 550
 551             it('merges text nodes on after element node', function() {
 552                 var doc = getDocumentFromXML('<root><div></div>text1</root>'),
 553                     textNode = doc.root.contents()[1],
 554                     div = doc.root.contents()[0],
 555                     returned;
 556                 returned = div.after({text: 'text2'});
 557                 expect(doc.root.contents().length).to.equal(2);
 558                 expect(returned.sameNode(doc.root.contents()[1])).to.equal(true, 'modified node returned');
 559                 expect(textNode.getText()).to.equal('text2text1');
 560             });
 561         });
 562
 563         it('wraps root element node with another element node', function() {
 564             var node = elementNodeFromXML('<div></div>'),
 565                 wrapper = elementNodeFromXML('<wrapper></wrapper>');
 566
 567             node.wrapWith(wrapper);
 568             expect(node.parent().sameNode(wrapper)).to.be.true;
 569             expect(node.document.root.sameNode(wrapper)).to.be.true;
 570         });
 571
 572         it('wraps element node with another element node', function() {
 573             var doc = getDocumentFromXML('<section><div></div></section>'),
 574                 div = doc.root.contents()[0];
 575
 576             var wrapper = div.wrapWith({tagName: 'wrapper'});
 577             expect(wrapper.sameNode(doc.root.contents()[0])).to.equal(true, '1');
 578             expect(div.parent().sameNode(wrapper)).to.equal(true, '2');
 579             expect(wrapper.contents()[0].sameNode(div)).to.equal(true, '3');
 580         });
 581
 582         it('wraps element outside of document tree', function() {
 583             var doc = getDocumentFromXML('<section><div></div></section>'),
 584                 node = doc.createDocumentNode({tagName: 'node'});
 585
 586             node.wrapWith({tagName: 'wrapper'});
 587             expect(node.parent().getTagName()).to.equal('wrapper');
 588             expect(node.parent().contents()[0].sameNode(node)).to.be.true;
 589             expect(doc.root.getTagName()).to.equal('section');
 590         });
 591
 592         it('unwraps element node contents', function() {
 593             var node = elementNodeFromXML('<div>Alice <div>has <span>propably</span> a cat</div>!</div>'),
 594                 outerDiv = node.contents()[1];
 595
 596             outerDiv.unwrapContent();
 597
 598             expect(node.contents().length).to.equal(3);
 599             expect(node.contents()[0].getText()).to.equal('Alice has ');
 600             expect(node.contents()[1].getTagName()).to.equal('span');
 601             expect(node.contents()[2].getText()).to.equal(' a cat!');
 602         });
 603
 604         it('removes parent-describing sibling nodes of unwrapped node', function() {
 605             var doc = getDocumentFromXML('<root><div><a></a><x></x><a></a></div></root>'),
 606                 div = doc.root.contents()[0],
 607                 x = div.contents()[1];
 608
 609             doc.registerExtension({documentNode: {methods: {
 610                 object: {
 611                     describesParent: function() {
 612                         return this.getTagName() === 'x';
 613                     }
 614                 }
 615             }}});
 616
 617             div.unwrapContent();
 618             expect(doc.root.contents().length).to.equal(2);
 619             expect(x.isInDocument()).to.be.false;
 620         });
 621
 622         it('unwrap single element node from its parent', function() {
 623             var doc = getDocumentFromXML('<div><a><b></b></a></div>'),
 624                 div = doc.root,
 625                 a = div.contents()[0],
 626                 b = a.contents()[0];
 627
 628             var parent = b.unwrap();
 629
 630             expect(parent.sameNode(div)).to.equal(true, 'returns new parent');
 631             expect(div.contents()).to.have.length(1, 'root contains only one node');
 632             expect(div.contents()[0].sameNode(b)).to.equal(true, 'node got unwrapped');
 633         });
 634
 635         it('unwrap single text node from its parent', function() {
 636             var doc = getDocumentFromXML('<div>Some <span>text</span>!</div>'),
 637                 div = doc.root,
 638                 span = div.contents()[1],
 639                 text = span.contents()[0];
 640
 641             var parent = text.unwrap();
 642
 643             expect(parent.sameNode(div)).to.equal(true, 'returns new parent');
 644             expect(div.contents()).to.have.length(1, 'root contains only one node');
 645             expect(div.contents()[0].getText()).to.equal('Some text!');
 646         });
 647
 648         describe('Wrapping text', function() {
 649             it('wraps text spanning multiple sibling TextNodes', function() {
 650                 var section = elementNodeFromXML('<section>Alice has a <span>small</span> cat</section>'),
 651                     wrapper = section.wrapText({
 652                         _with: {tagName: 'span', attrs: {'attr1': 'value1'}},
 653                         offsetStart: 6,
 654                         offsetEnd: 4,
 655                         textNodeIdx: [0,2]
 656                     });
 657
 658                 expect(section.contents().length).to.equal(2);
 659                 expect(section.contents()[0].nodeType).to.equal(Node.TEXT_NODE);
 660                 expect(section.contents()[0].getText()).to.equal('Alice ');
 661
 662                 var wrapper2 = section.contents()[1];
 663                 expect(wrapper2.sameNode(wrapper)).to.be.true;
 664                 expect(wrapper.getTagName()).to.equal('span');
 665
 666                 var wrapperContents = wrapper.contents();
 667                 expect(wrapperContents.length).to.equal(3);
 668                 expect(wrapperContents[0].getText()).to.equal('has a ');
 669
 670                 expect(wrapperContents[1].nodeType).to.equal(Node.ELEMENT_NODE);
 671                 expect(wrapperContents[1].contents().length).to.equal(1);
 672                 expect(wrapperContents[1].contents()[0].getText()).to.equal('small');
 673             });
 674
 675             it('keeps parent-describing nodes in place', function() {
 676                 var doc = getDocumentFromXML('<root>Alice <x></x> probably <y></y> has a cat</root>'),
 677                     root = doc.root,
 678                     x = root.contents()[1],
 679                     y = root.contents()[3];
 680
 681                 doc.registerExtension({documentNode: {methods: {
 682                     object: {
 683                         describesParent: function() {
 684                             /* globals Node */
 685                             return this.nodeType === Node.ELEMENT_NODE && this.getTagName() === 'x';
 686                         }
 687                     }
 688                 }}});
 689
 690                 root.wrapText({
 691                     _with: {tagName: 'span', attrs: {'attr1': 'value1'}},
 692                     offsetStart: 1,
 693                     offsetEnd: 4,
 694                     textNodeIdx: [0,4]
 695                 });
 696
 697                 expect(x.parent().sameNode(root)).to.be.true;
 698                 expect(y.parent().getTagName()).to.equal('span');
 699             });
 700         });
 701
 702         describe('Wrapping Nodes', function() {
 703             it('wraps multiple sibling nodes', function() {
 704                 var section = elementNodeFromXML('<section>Alice<div>has</div><div>a cat</div></section>'),
 705                     aliceText = section.contents()[0],
 706                     firstDiv = section.contents()[1],
 707                     lastDiv = section.contents()[section.contents().length -1];
 708
 709                 var returned = section.document.wrapNodes({
 710                         node1: aliceText,
 711                         node2: lastDiv,
 712                         _with: {tagName: 'header'}
 713                     });
 714
 715                 var sectionContentss = section.contents(),
 716                     header = sectionContentss[0],
 717                     headerContents = header.contents();
 718
 719                 expect(sectionContentss).to.have.length(1);
 720                 expect(header.sameNode(returned)).to.equal(true, 'wrapper returned');
 721                 expect(header.parent().sameNode(section)).to.be.true;
 722                 expect(headerContents).to.have.length(3);
 723                 expect(headerContents[0].sameNode(aliceText)).to.equal(true, 'first node wrapped');
 724                 expect(headerContents[1].sameNode(firstDiv)).to.equal(true, 'second node wrapped');
 725                 expect(headerContents[2].sameNode(lastDiv)).to.equal(true, 'third node wrapped');
 726             });
 727
 728             it('wraps multiple sibling Elements - middle case', function() {
 729                 var section = elementNodeFromXML('<section><div></div><div></div><div></div><div></div></section>'),
 730                     div2 = section.contents()[1],
 731                     div3 = section.contents()[2];
 732
 733                 section.document.wrapNodes({
 734                         node1: div2,
 735                         node2: div3,
 736                         _with: {tagName: 'header'}
 737                     });
 738
 739                 var sectionContentss = section.contents(),
 740                     header = sectionContentss[1],
 741                     headerChildren = header.contents();
 742
 743                 expect(sectionContentss).to.have.length(3);
 744                 expect(headerChildren).to.have.length(2);
 745                 expect(headerChildren[0].sameNode(div2)).to.equal(true, 'first node wrapped');
 746                 expect(headerChildren[1].sameNode(div3)).to.equal(true, 'second node wrapped');
 747             });
 748
 749             it('keeps parent-describing nodes in place', function() {
 750                 var section = elementNodeFromXML('<section>Alice<x></x><div>a cat</div></section>'),
 751                     aliceText = section.contents()[0],
 752                     x = section.contents()[1],
 753                     lastDiv = section.contents()[2];
 754
 755                 section.document.registerExtension({documentNode: {methods: {
 756                     object: {
 757                         describesParent: function() {
 758                             return this.nodeType === Node.ELEMENT_NODE && this.getTagName() === 'x';
 759                         }
 760                     }
 761                 }}});
 762
 763                 section.document.wrapNodes({
 764                         node1: aliceText,
 765                         node2: lastDiv,
 766                         _with: {tagName: 'header'}
 767                     });
 768
 769                 expect(x.parent().sameNode(section)).to.be.true;
 770                 expect(aliceText.parent().getTagName()).to.equal('header');
 771                 expect(lastDiv.parent().getTagName()).to.equal('header');
 772             });
 773         });
 774
 775     });
 776
 777     var getTextNodes = function(text, doc) {
 778         /* globals Node */
 779         var toret = [];
 780         var search = function(node) {
 781             node.contents().forEach(function(node) {
 782                 if(node.nodeType === Node.TEXT_NODE) {
 783                     if(node.getText() === text) {
 784                         toret.push(node);
 785                     }
 786                 } else {
 787                     search(node);
 788                 }
 789             });
 790         };
 791         search(doc.root);
 792         return toret;
 793     };
 794
 795     var getTextNode = function(text, doc) {
 796         var nodes = getTextNodes(text, doc),
 797             error;
 798         if(nodes.length === 0) {
 799             error = 'Text not found';
 800         } else if(nodes.length > 1) {
 801             error = 'Text not unique';
 802         } else if(nodes[0].getText() !== text) {
 803             error = 'I was trying to cheat your test :(';
 804         }
 805         if(error) {
 806             throw new Error(error);
 807         }
 808         return nodes[0];
 809     };
 810
 811     describe('Removing arbitrary text', function() {
 812         it('removes within single text element', function() {
 813             var doc = getDocumentFromXML('<div>Alice</div>'),
 814                 text = getTextNode('Alice', doc);
 815             doc.deleteText({
 816                 from: {
 817                     node: text,
 818                     offset: 1
 819                 },
 820                 to: {
 821                     node: text,
 822                     offset: 4
 823                 }
 824             });
 825             expect(doc.root.contents().length).to.equal(1);
 826             expect(doc.root.contents()[0].getText()).to.equal('Ae');
 827         });
 828         it('removes across elements - 1', function() {
 829             var doc = getDocumentFromXML('<div><a>aaa</a><b>bbb</b></div>');
 830
 831             doc.deleteText({
 832                 from: {
 833                     node: getTextNode('aaa', doc),
 834                     offset: 2
 835                 },
 836                 to: {
 837                     node: getTextNode('bbb', doc),
 838                     offset: 2
 839                 }
 840             });
 841
 842             var contents = doc.root.contents();
 843             expect(contents.length).to.equal(2);
 844             expect(contents[0].contents()[0].getText()).to.equal('aa');
 845             expect(contents[1].contents()[0].getText()).to.equal('b');
 846         });
 847         it('removes across elements - 2', function() {
 848             var doc = getDocumentFromXML('<a><b><c>ccc</c></b>xxx</a>');
 849             doc.deleteText({
 850                 from: {
 851                     node: getTextNode('ccc', doc),
 852                     offset: 2
 853                 },
 854                 to: {
 855                     node: getTextNode('xxx', doc),
 856                     offset: 2
 857                 }
 858             });
 859
 860             var contents = doc.root.contents();
 861             expect(contents.length).to.equal(2);
 862             expect(contents[0].getTagName()).to.equal('b');
 863             expect(contents[1].getText()).to.equal('x');
 864
 865             var bContents = contents[0].contents();
 866             expect(bContents.length).to.equal(1);
 867             expect(bContents[0].getTagName()).to.equal('c');
 868             expect(bContents[0].contents().length).to.equal(1);
 869             expect(bContents[0].contents()[0].getText()).to.equal('cc');
 870         });
 871         it('remove across elements - 3 (merged text nodes)', function() {
 872             var doc = getDocumentFromXML('<div>Alice <span>has</span> a cat</div>');
 873             doc.deleteText({
 874                 from: {
 875                     node: getTextNode('Alice ', doc),
 876                     offset: 1
 877                 },
 878                 to: {
 879                     node: getTextNode(' a cat', doc),
 880                     offset: 3
 881                 }
 882             });
 883             var contents = doc.root.contents();
 884             expect(contents.length).to.equal(1);
 885             expect(contents[0].getText()).to.equal('Acat');
 886         });
 887         it('remove across elements - 4', function() {
 888             var doc = getDocumentFromXML('<div>Alice <div>has <span>a</span> cat</div></div>');
 889             doc.deleteText({
 890                 from: {
 891                     node: getTextNode('Alice ', doc),
 892                     offset: 1
 893                 },
 894                 to: {
 895                     node: getTextNode(' cat', doc),
 896                     offset: 1
 897                 }
 898             });
 899             var contents = doc.root.contents();
 900             expect(contents.length).to.equal(2);
 901             expect(contents[0].getText()).to.equal('A');
 902             expect(contents[1].getTagName()).to.equal('div');
 903             expect(contents[1].contents().length).to.equal(1);
 904             expect(contents[1].contents()[0].getText()).to.equal('cat');
 905         });
 906         it('removes across elements - 5 (whole document)', function() {
 907             var doc = getDocumentFromXML('<div>Alice <div>has <span>a</span> cat</div>!!!</div>');
 908             doc.deleteText({
 909                 from: {
 910                     node: getTextNode('Alice ', doc),
 911                     offset: 0
 912                 },
 913                 to: {
 914                     node: getTextNode('!!!', doc),
 915                     offset: 3
 916                 }
 917             });
 918
 919             expect(doc.root.getTagName()).to.equal('div');
 920             expect(doc.root.contents().length).to.equal(1);
 921             expect(doc.root.contents()[0].getText()).to.equal('');
 922         });
 923         it('removes nodes in between', function() {
 924             var doc = getDocumentFromXML('<div><a>aaa<x>!</x></a>xxx<x></x><b><x>!</x>bbb</b></div>');
 925             doc.deleteText({
 926                 from: {
 927                     node: getTextNode('aaa', doc),
 928                     offset: 2
 929                 },
 930                 to: {
 931                     node: getTextNode('bbb', doc),
 932                     offset: 2
 933                 }
 934             });
 935
 936             var contents = doc.root.contents();
 937             expect(contents.length).to.equal(2, 'two nodes survived');
 938             expect(contents[0].getTagName()).to.equal('a');
 939             expect(contents[1].getTagName()).to.equal('b');
 940             expect(contents[0].contents().length).to.equal(1);
 941             expect(contents[0].contents()[0].getText()).to.equal('aa');
 942             expect(contents[1].contents().length).to.equal(1);
 943             expect(contents[1].contents()[0].getText()).to.equal('b');
 944         });
 945         it('removes across elements - 6', function() {
 946             var doc = getDocumentFromXML('<root><div>aaa<span>bbb</span>ccc</div><div>ddd</div></root>');
 947             doc.deleteText({
 948                 from: {
 949                     node: getTextNode('aaa', doc),
 950                     offset: 1
 951                 },
 952                 to: {
 953                     node: getTextNode('ddd', doc),
 954                     offset: 1
 955                 }
 956             }, {
 957                 error: function(e) {throw e;}
 958             });
 959
 960             var contents = doc.root.contents();
 961             expect(contents.length).to.equal(2);
 962             expect(contents[0].contents().length).to.equal(1);
 963             expect(contents[0].contents()[0].getText()).to.equal('a');
 964             expect(contents[1].contents().length).to.equal(1);
 965             expect(contents[1].contents()[0].getText()).to.equal('dd');
 966         });
 967     });
 968
 969     describe('Splitting text', function() {
 970
 971         it('splits TextNode\'s parent into two ElementNodes', function() {
 972             var doc = getDocumentFromXML('<section><header>Some header</header></section>'),
 973                 section = doc.root,
 974                 text = section.contents()[0].contents()[0];
 975
 976             var returnedValue = text.split({offset: 5});
 977             expect(section.contents().length).to.equal(2, 'section has two children');
 978
 979             var header1 = section.contents()[0];
 980             var header2 = section.contents()[1];
 981
 982             expect(header1.getTagName()).to.equal('header', 'first section child ok');
 983             expect(header1.contents().length).to.equal(1, 'first header has one child');
 984             expect(header1.contents()[0].getText()).to.equal('Some ', 'first header has correct content');
 985             expect(header2.getTagName()).to.equal('header', 'second section child ok');
 986             expect(header2.contents().length).to.equal(1, 'second header has one child');
 987             expect(header2.contents()[0].getText()).to.equal('header', 'second header has correct content');
 988
 989             expect(returnedValue.first.sameNode(header1)).to.equal(true, 'first node returned');
 990             expect(returnedValue.second.sameNode(header2)).to.equal(true, 'second node returned');
 991         });
 992
 993         it('leaves empty copy of ElementNode if splitting at the very beginning', function() {
 994                 var doc = getDocumentFromXML('<section><header>Some header</header></section>'),
 995                 section = doc.root,
 996                 text = section.contents()[0].contents()[0];
 997
 998                 text.split({offset: 0});
 999
1000                 var header1 = section.contents()[0];
1001                 var header2 = section.contents()[1];
1002
1003                 expect(header1.contents().length).to.equal(0);
1004                 expect(header2.contents()[0].getText()).to.equal('Some header');
1005         });
1006
1007         it('leaves empty copy of ElementNode if splitting at the very end', function() {
1008                 var doc = getDocumentFromXML('<section><header>Some header</header></section>'),
1009                 section = doc.root,
1010                 text = section.contents()[0].contents()[0];
1011
1012                 text.split({offset: 11});
1013
1014                 var header1 = section.contents()[0];
1015                 var header2 = section.contents()[1];
1016
1017                 expect(header1.contents()[0].getText()).to.equal('Some header');
1018                 expect(header2.contents().length).to.equal(0);
1019         });
1020
1021         it('keeps TextNodes\'s parent\'s children elements intact', function() {
1022             var doc = getDocumentFromXML('<section><header>A <span>fancy</span> and <span>nice</span> header</header></section>'),
1023                 section = doc.root,
1024                 header = section.contents()[0],
1025                 textAnd = header.contents()[2];
1026
1027             textAnd.split({offset: 2});
1028
1029             var sectionContents = section.contents();
1030             expect(sectionContents.length).to.equal(2, 'Section has two children');
1031             expect(sectionContents[0].getTagName()).to.equal('header', 'First section node is a header');
1032             expect(sectionContents[1].getTagName()).to.equal('header', 'Second section node is a header');
1033
1034             var firstHeaderContents = sectionContents[0].contents();
1035             expect(firstHeaderContents.length).to.equal(3, 'First header has three children');
1036             expect(firstHeaderContents[0].getText()).to.equal('A ', 'First header starts with a text');
1037             expect(firstHeaderContents[1].getTagName()).to.equal('span', 'First header has span in the middle');
1038             expect(firstHeaderContents[2].getText()).to.equal(' a', 'First header ends with text');
1039
1040             var secondHeaderContents = sectionContents[1].contents();
1041             expect(secondHeaderContents.length).to.equal(3, 'Second header has three children');
1042             expect(secondHeaderContents[0].getText()).to.equal('nd ', 'Second header starts with text');
1043             expect(secondHeaderContents[1].getTagName()).to.equal('span', 'Second header has span in the middle');
1044             expect(secondHeaderContents[2].getText()).to.equal(' header', 'Second header ends with text');
1045         });
1046     });
1047
1048     describe('Events', function() {
1049         it('emits nodeDetached event on node detach', function() {
1050             var node = elementNodeFromXML('<div><div></div></div>'),
1051                 innerNode = node.contents()[0],
1052                 spy = sinon.spy();
1053             node.document.on('change', spy);
1054
1055             var detached = innerNode.detach(),
1056                 event = spy.args[0][0];
1057
1058             expect(event.type).to.equal('nodeDetached');
1059             expect(event.meta.node.sameNode(detached, 'detached node in event meta'));
1060             expect(event.meta.parent.sameNode(node), 'original parent node in event meta');
1061         }),
1062
1063         it('emits nodeAdded event when appending new node', function() {
1064             var node = elementNodeFromXML('<div></div>'),
1065                 spy = sinon.spy();
1066             node.document.on('change', spy);
1067
1068             var appended = node.append({tagName:'div'}),
1069                 event = spy.args[0][0];
1070             expect(event.type).to.equal('nodeAdded');
1071             expect(event.meta.node.sameNode(appended)).to.be.true;
1072         });
1073
1074         it('emits nodeDetached/nodeAdded events with `move` flag when appending aready existing node', function() {
1075             var node = elementNodeFromXML('<div><a></a><b></b></div>'),
1076                 a = node.contents()[0],
1077                 b = node.contents()[1],
1078                 spy = sinon.spy();
1079             node.document.on('change', spy);
1080
1081             var appended = a.append(b),
1082                 detachedEvent = spy.args[0][0],
1083                 addedEvent = spy.args[1][0];
1084
1085             expect(spy.callCount).to.equal(2);
1086             expect(detachedEvent.type).to.equal('nodeDetached');
1087             expect(detachedEvent.meta.node.sameNode(appended)).to.be.true;
1088             expect(detachedEvent.meta.move).to.equal(true, 'move flag set to true for nodeDetachedEvent');
1089             expect(addedEvent.type).to.equal('nodeAdded');
1090             expect(addedEvent.meta.node.sameNode(appended)).to.be.true;
1091             expect(addedEvent.meta.move).to.equal(true, 'move flag set to true for nodeAddedEvent');
1092
1093         });
1094
1095         it('emits nodeAdded event when prepending new node', function() {
1096             var node = elementNodeFromXML('<div></div>'),
1097                 spy = sinon.spy();
1098             node.document.on('change', spy);
1099
1100             var prepended = node.prepend({tagName:'div'}),
1101                 event = spy.args[0][0];
1102             expect(event.type).to.equal('nodeAdded');
1103             expect(event.meta.node.sameNode(prepended)).to.be.true;
1104         });
1105
1106         it('emits nodeDetached/nodeAdded events with `move` flag when prepending aready existing node', function() {
1107             var node = elementNodeFromXML('<div><a></a><b></b></div>'),
1108                 a = node.contents()[0],
1109                 b = node.contents()[1],
1110                 spy = sinon.spy();
1111             node.document.on('change', spy);
1112
1113             var prepended = a.prepend(b),
1114                 detachedEvent = spy.args[0][0],
1115                 addedEvent = spy.args[1][0];
1116
1117             expect(spy.callCount).to.equal(2);
1118             expect(detachedEvent.type).to.equal('nodeDetached');
1119             expect(detachedEvent.meta.node.sameNode(prepended)).to.be.true;
1120             expect(detachedEvent.meta.move).to.equal(true, 'move flag set to true for nodeDetachedEvent');
1121             expect(addedEvent.type).to.equal('nodeAdded');
1122             expect(addedEvent.meta.node.sameNode(prepended)).to.be.true;
1123             expect(addedEvent.meta.move).to.equal(true, 'move flag set to true for nodeAddedEvent');
1124         });
1125
1126         it('emits nodeAdded event when inserting node after another', function() {
1127             var node = elementNodeFromXML('<div><a></a></div>').contents()[0],
1128                 spy = sinon.spy();
1129             node.document.on('change', spy);
1130
1131             var inserted = node.after({tagName:'div'}),
1132                 event = spy.args[0][0];
1133             expect(event.type).to.equal('nodeAdded');
1134             expect(event.meta.node.sameNode(inserted)).to.be.true;
1135         });
1136
1137         it('emits nodeDetached/nodeAdded events with `move` flag when inserting aready existing node after another', function() {
1138             var node = elementNodeFromXML('<div><a></a><b></b></div>'),
1139                 a = node.contents()[0],
1140                 b = node.contents()[1],
1141                 spy = sinon.spy();
1142             node.document.on('change', spy);
1143             var inserted = b.after(a),
1144                 detachedEvent = spy.args[0][0],
1145                 addedEvent = spy.args[1][0];
1146
1147             expect(spy.callCount).to.equal(2);
1148             expect(detachedEvent.type).to.equal('nodeDetached');
1149             expect(detachedEvent.meta.node.sameNode(inserted)).to.be.true;
1150             expect(detachedEvent.meta.move).to.equal(true, 'move flag set to true for nodeDetachedEvent');
1151             expect(addedEvent.type).to.equal('nodeAdded');
1152             expect(addedEvent.meta.node.sameNode(inserted)).to.be.true;
1153             expect(addedEvent.meta.move).to.equal(true, 'move flag set to true for nodeAddedEvent');
1154         });
1155
1156         it('emits nodeAdded event when inserting node before another', function() {
1157             var node = elementNodeFromXML('<div><a></a></div>').contents()[0],
1158                 spy = sinon.spy();
1159             node.document.on('change', spy);
1160
1161             var inserted = node.before({tagName:'div'}),
1162                 event = spy.args[0][0];
1163             expect(event.type).to.equal('nodeAdded');
1164             expect(event.meta.node.sameNode(inserted)).to.be.true;
1165         });
1166
1167         it('emits nodeDetached/nodeAdded events with `move` flag when inserting aready existing node before another', function() {
1168             var node = elementNodeFromXML('<div><a></a><b></b></div>'),
1169                 a = node.contents()[0],
1170                 b = node.contents()[1],
1171                 spy = sinon.spy();
1172             node.document.on('change', spy);
1173             var inserted = a.before(b),
1174                 detachedEvent = spy.args[0][0],
1175                 addedEvent = spy.args[1][0];
1176
1177             expect(spy.callCount).to.equal(2);
1178             expect(detachedEvent.type).to.equal('nodeDetached');
1179             expect(detachedEvent.meta.node.sameNode(inserted)).to.be.true;
1180             expect(detachedEvent.meta.move).to.equal(true, 'move flag set to true for nodeDetachedEvent');
1181             expect(addedEvent.type).to.equal('nodeAdded');
1182             expect(addedEvent.meta.node.sameNode(inserted)).to.be.true;
1183             expect(addedEvent.meta.move).to.equal(true, 'move flag set to true for nodeAddedEvent');
1184         });
1185
1186         it('emits nodeDetached and nodeAdded when replacing root node with another', function() {
1187             var doc = getDocumentFromXML('<a></a>'),
1188                 oldRoot = doc.root,
1189                 spy = sinon.spy();
1190
1191             doc.on('change', spy);
1192
1193             doc.root.replaceWith({tagName: 'b'});
1194
1195             expect(spy.callCount).to.equal(2);
1196
1197             var event1 = spy.args[0][0],
1198                 event2 = spy.args[1][0];
1199
1200             expect(event1.type).to.equal('nodeDetached');
1201             expect(event1.meta.node.sameNode(oldRoot)).to.equal(true, 'root node in nodeDetached event metadata');
1202             expect(event2.type).to.equal('nodeAdded');
1203             expect(event2.meta.node.sameNode(doc.root)).to.equal(true, 'new root node in nodelAdded event meta');
1204         });
1205
1206
1207         ['append', 'prepend', 'before', 'after'].forEach(function(insertionMethod) {
1208             it('emits nodeDetached for node moved from a document tree to out of document node ' + insertionMethod, function() {
1209                 var doc = getDocumentFromXML('<div><a></a></div>'),
1210                     a = doc.root.contents()[0],
1211                     spy = sinon.spy();
1212
1213                 doc.on('change', spy);
1214
1215                 var newNode = doc.createDocumentNode({tagName: 'b'}),
1216                     newNodeInner = newNode.append({tagName:'c'});
1217
1218                 newNodeInner[insertionMethod](a);
1219
1220                 var event = spy.args[0][0];
1221                 expect(event.type).to.equal('nodeDetached');
1222                 expect(event.meta.node.sameNode(a));
1223             });
1224
1225             it('doesn\'t emit nodeDetached event for already out of document node moved to out of document node' + insertionMethod, function() {
1226                 var doc = getDocumentFromXML('<div><a></a></div>'),
1227                     spy = sinon.spy();
1228
1229                 doc.on('change', spy);
1230
1231                 var newNode = doc.createDocumentNode({tagName: 'b'});
1232                 newNode.append({tagName:'c'});
1233
1234                 expect(spy.callCount).to.equal(0);
1235             });
1236         });
1237
1238
1239     });
1240
1241     describe('Traversing', function() {
1242         describe('Basic', function() {
1243             it('can access node parent', function() {
1244                 var doc = getDocumentFromXML('<a><b></b></a>'),
1245                     a = doc.root,
1246                     b = a.contents()[0];
1247
1248                 expect(a.parent()).to.equal(null, 'parent of a root is null');
1249                 expect(b.parent().sameNode(a)).to.be.true;
1250             });
1251             it('can access node parents', function() {
1252                 var doc = getDocumentFromXML('<a><b><c></c></b></a>'),
1253                     a = doc.root,
1254                     b = a.contents()[0],
1255                     c = b.contents()[0];
1256
1257                 var parents = c.parents();
1258                 // @@
1259                 expect(parents[0].sameNode(b)).to.be.true;
1260                 expect(parents[1].sameNode(a)).to.be.true;
1261             });
1262         });
1263
1264         describe('finding sibling parents of two elements', function() {
1265             it('returns elements themself if they have direct common parent', function() {
1266                 var doc = getDocumentFromXML('<section><div><div>A</div><div>B</div></div></section>'),
1267                     wrappingDiv = doc.root.contents()[0],
1268                     divA = wrappingDiv.contents()[0],
1269                     divB = wrappingDiv.contents()[1];
1270
1271                 var siblingParents = doc.getSiblingParents({node1: divA, node2: divB});
1272
1273                 expect(siblingParents.node1.sameNode(divA)).to.equal(true, 'divA');
1274                 expect(siblingParents.node2.sameNode(divB)).to.equal(true, 'divB');
1275             });
1276
1277             it('returns sibling parents - example 1', function() {
1278                 var doc = getDocumentFromXML('<section>Alice <span>has a cat</span></section>'),
1279                     aliceText = doc.root.contents()[0],
1280                     span = doc.root.contents()[1],
1281                     spanText = span.contents()[0];
1282
1283                 var siblingParents = doc.getSiblingParents({node1: aliceText, node2: spanText});
1284
1285                 expect(siblingParents.node1.sameNode(aliceText)).to.equal(true, 'aliceText');
1286                 expect(siblingParents.node2.sameNode(span)).to.equal(true, 'span');
1287             });
1288
1289             it('returns node itself for two same nodes', function() {
1290                 var doc = getDocumentFromXML('<section><div></div></section>'),
1291                     div = doc.root.contents()[0];
1292
1293                 var siblingParents = doc.getSiblingParents({node1: div, node2: div});
1294                 expect(!!siblingParents.node1 && !!siblingParents.node2).to.equal(true, 'nodes defined');
1295                 expect(siblingParents.node1.sameNode(div)).to.be.equal(true, 'node1');
1296                 expect(siblingParents.node2.sameNode(div)).to.be.equal(true, 'node2');
1297             });
1298         });
1299     });
1300
1301     describe('Serializing document to WLXML', function() {
1302         it('keeps document intact when no changes have been made', function() {
1303             var xmlIn = '<section>Alice<div>has</div>a <span class="uri" meta-uri="http://cat.com">cat</span>!</section>',
1304                 doc = getDocumentFromXML(xmlIn),
1305                 xmlOut = doc.toXML();
1306
1307             var parser = new DOMParser(),
1308                 input = parser.parseFromString(xmlIn, 'application/xml').childNodes[0],
1309                 output = parser.parseFromString(xmlOut, 'application/xml').childNodes[0];
1310
1311             expect(input.isEqualNode(output)).to.be.true;
1312         });
1313
1314         it('keeps entities intact', function() {
1315             var xmlIn = '<section>&lt; &gt;</section>',
1316                 doc = getDocumentFromXML(xmlIn),
1317                 xmlOut = doc.toXML();
1318             expect(xmlOut).to.equal(xmlIn);
1319         });
1320         it('keeps entities intact when they form html/xml', function() {
1321             var xmlIn = '<section>&lt;abc&gt;</section>',
1322                 doc = getDocumentFromXML(xmlIn),
1323                 xmlOut = doc.toXML();
1324             expect(xmlOut).to.equal(xmlIn);
1325         });
1326     });
1327
1328     describe('Extension API', function() {
1329         var doc, extension, elementNode, textNode;
1330
1331         beforeEach(function() {
1332             doc = getDocumentFromXML('<section>Alice<div class="test_class"></div></section>');
1333             elementNode = doc.root;
1334             textNode = doc.root.contents()[0];
1335             extension = {};
1336
1337             expect(elementNode.testTransformation).to.be.undefined;
1338             expect(textNode.testTransformation).to.be.undefined;
1339             expect(doc.testTransformation).to.be.undefined;
1340
1341             expect(doc.testMethod).to.be.undefined;
1342             expect(elementNode.testMethod).to.be.undefined;
1343             expect(textNode.testMethod).to.be.undefined;
1344             expect(elementNode.elementTestMethod).to.be.undefined;
1345             expect(textNode.textTestMethod).to.be.undefined;
1346         });
1347
1348         it('allows adding method to a document', function() {
1349             extension = {document: {methods: {
1350                 testMethod: function() { return this; }
1351             }}};
1352
1353             doc.registerExtension(extension);
1354             expect(doc.testMethod()).to.equal(doc, 'context is set to a document instance');
1355         });
1356
1357         it('allows adding transformation to a document', function() {
1358             extension = {document: {transformations: {
1359                 testTransformation: function() { return this; },
1360                 testTransformation2: {impl: function() { return this;}}
1361             }}};
1362
1363             doc.registerExtension(extension);
1364             expect(doc.testTransformation()).to.equal(doc, 'context is set to a document instance');
1365             expect(doc.testTransformation2()).to.equal(doc, 'context is set to a document instance');
1366         });
1367
1368         it('allows adding method to a DocumentNode instance', function() {
1369             extension = {
1370                 documentNode: {
1371                     methods: {
1372                         testMethod: function() { return this; }
1373                     }
1374                 },
1375                 textNode: {
1376                     methods: {
1377                         textTestMethod: function() { return this; }
1378                     }
1379                 },
1380                 elementNode: {
1381                     methods: {
1382                         elementTestMethod: function() { return this; }
1383                     }
1384                 }
1385             };
1386
1387             doc.registerExtension(extension);
1388
1389             /* refresh */
1390             elementNode = doc.root;
1391             textNode = doc.root.contents()[0];
1392
1393             expect(elementNode.testMethod().sameNode(elementNode)).to.equal(true, 'context is set to a node instance');
1394             expect(textNode.testMethod().sameNode(textNode)).to.equal(true, 'context is set to a node instance');
1395
1396             expect(elementNode.elementTestMethod().sameNode(elementNode)).to.be.true;
1397             expect(elementNode.textTestMethod).to.be.undefined;
1398
1399             expect(textNode.textTestMethod().sameNode(textNode)).to.be.true;
1400             expect(textNode.elementTestMethod).to.be.undefined;
1401         });
1402
1403         it('allows adding transformation to a DocumentNode', function() {
1404             extension = {
1405                 documentNode: {
1406                     transformations: {
1407                         testTransformation: function() { return this; },
1408                         testTransformation2: {impl: function() { return this;}}
1409                     }
1410                 },
1411                 textNode: {
1412                     transformations: {
1413                         textTestTransformation: function() { return this; }
1414                     }
1415                 },
1416                 elementNode: {
1417                     transformations: {
1418                         elementTestTransformation: function() { return this; }
1419                     }
1420                 }
1421             };
1422
1423             doc.registerExtension(extension);
1424
1425             /* refresh */
1426             elementNode = doc.root;
1427             textNode = doc.root.contents()[0];
1428
1429             expect(elementNode.testTransformation().sameNode(elementNode)).to.equal(true, '1');
1430             expect(elementNode.testTransformation2().sameNode(elementNode)).to.equal(true, '2');
1431             expect(textNode.testTransformation().sameNode(textNode)).to.equal(true, '3');
1432             expect(textNode.testTransformation2().sameNode(textNode)).to.equal(true, '4');
1433
1434             expect(elementNode.elementTestTransformation().sameNode(elementNode)).to.be.true;
1435             expect(elementNode.textTestTransformation).to.be.undefined;
1436
1437             expect(textNode.textTestTransformation().sameNode(textNode)).to.be.true;
1438             expect(textNode.elementTestTransfomation).to.be.undefined;
1439         });
1440
1441         it('allows text/element node methods and transformations to access node and transormations on document node', function() {
1442
1443             var doc = getDocumentFromXML('<div>text</div>');
1444
1445             doc.registerExtension({
1446                 documentNode: {
1447                     methods: {
1448                         test: function() {
1449                             return 'super';
1450                         }
1451                     },
1452                     transformations: {
1453                         testT: function() {
1454                             return 'super_trans';
1455                         }
1456                     }
1457                 },
1458                 elementNode: {
1459                     methods: {
1460                         test: function() {
1461                             return 'element_sub_' + this.__super__.test();
1462                         }
1463                     },
1464                     transformations: {
1465                         testT: function() {
1466                             return 'element_trans_sub_' + this.__super__.testT();
1467                         }
1468                     }
1469                 },
1470                 textNode: {
1471                     methods: {
1472                         test: function() {
1473                             return 'text_sub_' + this.__super__.test();
1474                         }
1475                     },
1476                     transformations: {
1477                         testT: function() {
1478                             return 'text_trans_sub_' + this.__super__.testT();
1479                         }
1480                     }
1481                 }
1482             });
1483
1484             var textNode = doc.root.contents()[0];
1485
1486             expect(doc.root.test()).to.equal('element_sub_super');
1487             expect(textNode.test()).to.equal('text_sub_super');
1488             expect(doc.root.testT()).to.equal('element_trans_sub_super_trans');
1489             expect(textNode.testT()).to.equal('text_trans_sub_super_trans');
1490         });
1491     });
1492
1493     describe('Undo/redo', function() {
1494
1495         it('smoke tests', function() {
1496             var doc = getDocumentFromXML('<div>Alice</div>'),
1497                 textNode = doc.root.contents()[0];
1498
1499             expect(doc.undoStack).to.have.length(0);
1500
1501             textNode.wrapWith({tagName: 'span', start:1, end:2});
1502             expect(doc.undoStack).to.have.length(1, '1');
1503             expect(doc.toXML()).to.equal('<div>A<span>l</span>ice</div>');
1504
1505             doc.undo();
1506             expect(doc.undoStack).to.have.length(0, '2');
1507             expect(doc.toXML()).to.equal('<div>Alice</div>');
1508
1509             doc.redo();
1510             expect(doc.undoStack).to.have.length(1, '3');
1511             expect(doc.toXML()).to.equal('<div>A<span>l</span>ice</div>');
1512
1513             doc.undo();
1514             expect(doc.undoStack).to.have.length(0, '4');
1515             expect(doc.toXML()).to.equal('<div>Alice</div>');
1516
1517             doc.undo();
1518             expect(doc.undoStack).to.have.length(0, '5');
1519             expect(doc.toXML()).to.equal('<div>Alice</div>');
1520         });
1521
1522         it('smoke tests 2', function() {
1523             var doc = getDocumentFromXML('<div>Alice</div>'),
1524                 textNode = doc.root.contents()[0],
1525                 path = textNode.getPath();
1526
1527             textNode.setText('Alice ');
1528             textNode.setText('Alice h');
1529             textNode.setText('Alice ha');
1530             textNode.setText('Alice has');
1531
1532             expect(textNode.getText()).to.equal('Alice has');
1533
1534             doc.undo();
1535             expect(doc.root.contents()[0].getText()).to.equal('Alice ha', '1');
1536
1537             doc.undo();
1538             expect(doc.root.contents()[0].getText()).to.equal('Alice h', '2');
1539
1540             doc.redo();
1541             expect(doc.root.contents()[0].getText()).to.equal('Alice ha', '3');
1542
1543             doc.redo();
1544             expect(doc.root.contents()[0].getText()).to.equal('Alice has', '4');
1545
1546             doc.undo();
1547             doc.undo();
1548             textNode = doc.getNodeByPath(path);
1549             textNode.setText('Cat');
1550             doc.undo();
1551             textNode = doc.getNodeByPath(path);
1552             expect(textNode.getText()).to.equal('Alice h');
1553         });
1554
1555
1556         var sampleMethod = function(val) {
1557             this._$.attr('x', val);
1558             this.triggerChangeEvent();
1559         };
1560
1561         var transformations = {
1562             'unaware': sampleMethod,
1563             'returning change root': {
1564                 impl: sampleMethod,
1565                 getChangeRoot: function() {
1566                     return this.context;
1567                 }
1568             },
1569             'implementing undo operation': {
1570                 impl: function(t, val) {
1571                     t.oldVal = this.getAttr('x');
1572                     sampleMethod.call(this, val);
1573                 },
1574                 undo: function(t) {
1575                     this.setAttr('x', t.oldVal);
1576                 }
1577             }
1578         };
1579
1580         _.pairs(transformations).forEach(function(pair) {
1581             var name = pair[0],
1582                 transformaton = pair[1];
1583
1584             describe(name + ' transformation: ', function() {
1585                 var doc, node, nodePath;
1586
1587                 beforeEach(function() {
1588                     doc = getDocumentFromXML('<div><test x="old"></test></div>');
1589
1590                     doc.registerExtension({elementNode: {transformations: {
1591                         test: transformaton
1592                     }}});
1593
1594                     node = doc.root.contents()[0];
1595                     nodePath = node.getPath();
1596                 });
1597
1598                 it('transforms as expected', function() {
1599                     node.test('new');
1600                     expect(node.getAttr('x')).to.equal('new');
1601                 });
1602
1603                 it('can be undone', function() {
1604                     node.test('new');
1605                     doc.undo();
1606                     node = doc.getNodeByPath(nodePath);
1607                     expect(node.getAttr('x')).to.equal('old');
1608                 });
1609
1610                 it('can be undone and then redone', function() {
1611                     node.test('new');
1612                     doc.undo();
1613                     doc.redo();
1614                     node = doc.getNodeByPath(nodePath);
1615                     expect(node.getAttr('x')).to.equal('new');
1616                 });
1617
1618                 it('handles a sample scenario', function() {
1619                     doc.root.contents()[0].test('1');
1620                     doc.root.contents()[0].test('2');
1621                     doc.root.contents()[0].test('3');
1622                     doc.root.contents()[0].test('4');
1623                     doc.root.contents()[0].test('5');
1624
1625                     expect(doc.root.contents()[0].getAttr('x')).to.equal('5', 'after initial transformations');
1626                     doc.undo();
1627                     expect(doc.root.contents()[0].getAttr('x')).to.equal('4', 'undo 1.1');
1628                     doc.undo();
1629                     expect(doc.root.contents()[0].getAttr('x')).to.equal('3', 'undo 1.2');
1630                     doc.redo();
1631                     expect(doc.root.contents()[0].getAttr('x')).to.equal('4', 'redo 1.1');
1632                     doc.redo();
1633                     expect(doc.root.contents()[0].getAttr('x')).to.equal('5', 'redo 1.2');
1634                     doc.undo();
1635                     expect(doc.root.contents()[0].getAttr('x')).to.equal('4', 'undo 2.1');
1636                     doc.root.contents()[0].test('10');
1637                     expect(doc.root.contents()[0].getAttr('x')).to.equal('10', 'additional transformation');
1638                     expect(doc.redoStack.length).to.equal(0, 'transformation cleared redo stack');
1639                     doc.redo();
1640                     expect(doc.root.contents()[0].getAttr('x')).to.equal('10', 'empty redoStack so redo was noop');
1641                     doc.undo();
1642                     expect(doc.root.contents()[0].getAttr('x')).to.equal('4', 'undoing additional transformation');
1643                     doc.redo();
1644                     expect(doc.root.contents()[0].getAttr('x')).to.equal('10', 'redoing additional transformation');
1645                 });
1646             });
1647         });
1648
1649         it('smoke tests nested transformations', function() {
1650             var doc = getDocumentFromXML('<div></div>');
1651
1652             doc.registerExtension({elementNode: {transformations: {
1653                 nested: function(v) {
1654                     this._$.attr('innerAttr', v);
1655                     this.triggerChangeEvent();
1656                 },
1657                 outer: function(v) {
1658                     this.nested(v);
1659                     this._$.attr('outerAttr', v);
1660                     this.triggerChangeEvent();
1661                 }
1662             }}});
1663
1664             doc.root.outer('test1');
1665             doc.root.outer('test2');
1666
1667             expect(doc.root.getAttr('innerAttr')).to.equal('test2');
1668             expect(doc.root.getAttr('outerAttr')).to.equal('test2');
1669
1670             doc.undo();
1671
1672             expect(doc.root.getAttr('innerAttr')).to.equal('test1');
1673             expect(doc.root.getAttr('outerAttr')).to.equal('test1');
1674
1675             doc.undo();
1676
1677             expect(doc.root.getAttr('innerAttr')).to.equal(undefined);
1678             expect(doc.root.getAttr('outerAttr')).to.equal(undefined);
1679
1680             doc.redo();
1681
1682             expect(doc.root.getAttr('innerAttr')).to.equal('test1');
1683             expect(doc.root.getAttr('outerAttr')).to.equal('test1');
1684
1685             doc.redo();
1686
1687             expect(doc.root.getAttr('innerAttr')).to.equal('test2');
1688             expect(doc.root.getAttr('outerAttr')).to.equal('test2');
1689
1690         });
1691
1692         it('ignores transformation if document didn\'t emit change event', function() {
1693             var doc = getDocumentFromXML('<div></div>');
1694
1695             doc.registerExtension({elementNode: {transformations: {
1696                 test: function() {
1697                     // empty
1698                 }
1699             }}});
1700
1701             doc.root.test();
1702             expect(doc.undoStack.length).to.equal(0);
1703
1704         });
1705
1706         describe('Transactions', function() {
1707             it('allows to undo/redo series of transformations at once', function() {
1708                 var doc = getDocumentFromXML('<div></div>');
1709
1710                 doc.registerExtension({
1711                     elementNode: {transformations: {
1712                         test: function(v) {
1713                             this.setAttr('test', v);
1714                         }
1715                     }}
1716                 });
1717
1718                 doc.startTransaction();
1719                 doc.root.test('1');
1720                 doc.root.test('2');
1721                 doc.root.test('3');
1722                 doc.endTransaction();
1723
1724                 doc.undo();
1725                 expect(doc.root.getAttr('test'), '1');
1726                 doc.redo();
1727                 expect(doc.root.getAttr('test'), '3');
1728                 doc.undo();
1729                 expect(doc.root.getAttr('test'), '1');
1730                 doc.redo();
1731                 expect(doc.root.getAttr('test'), '3');
1732             });
1733
1734             it('ignores empty transactions', function() {
1735                 var doc = getDocumentFromXML('<div></div>');
1736                 doc.startTransaction();
1737                 doc.endTransaction();
1738                 expect(doc.undoStack).to.have.length(0, 'empty transaction doesn\'t get pushed into undo stack');
1739             });
1740
1741             it('doesn\'t break on optimizations', function() {
1742                 // This is a smoke test checking if optimizations made to transaction undoing
1743                 // doesnt't break anything.
1744                 var doc = getDocumentFromXML('<div smart="1" unaware="1"></div>');
1745
1746                 doc.registerExtension({
1747                     elementNode: {transformations: {
1748                         unaware: function(v) {
1749                             this.setAttr('unware', v);
1750                             this.triggerChangeEvent();
1751                         },
1752                         smart: {
1753                             impl: function(t, v) {
1754                                 t.oldVal = this.getAttr('smart');
1755                                 this.setAttr('smart', v);
1756                                 this.triggerChangeEvent();
1757                             },
1758                             undo: function(t) {
1759                                 this.setAttr('smart', t.oldVal);
1760                                 this.triggerChangeEvent();
1761                             }
1762                         }
1763                     }}
1764                 });
1765
1766                 doc.startTransaction();
1767                 doc.root.smart('2');
1768                 doc.root.unaware('2');
1769                 doc.root.smart('3');
1770                 doc.root.unaware('3');
1771                 doc.endTransaction();
1772
1773                 doc.undo();
1774
1775                 expect(doc.root.getAttr('smart')).to.equal('1');
1776                 expect(doc.root.getAttr('unaware')).to.equal('1');
1777             });
1778
1779             it('can have associated metadata', function() {
1780                 var doc = getDocumentFromXML('<div></div>'),
1781                     metadata = Object.create({});
1782
1783                 doc.registerExtension({document: {transformations: {
1784                     test: function() {
1785                         this.trigger('change');
1786                     }
1787                 }}});
1788
1789                 doc.startTransaction(metadata);
1790                 doc.test();
1791                 doc.endTransaction();
1792
1793                 var transaction = doc.undoStack[0];
1794                 expect(transaction.metadata).to.equal(metadata);
1795             });
1796
1797             it('can be rolled back', function() {
1798                 var doc = getDocumentFromXML('<root></root>');
1799
1800                 doc.startTransaction();
1801                 doc.root.append({tagName: 'div'});
1802                 doc.rollbackTransaction();
1803
1804                 expect(doc.undoStack.length).to.equal(0, 'nothing to undo');
1805                 expect(doc.root.contents().length).to.equal(0);
1806             });
1807
1808             it('rollbacks and calls error handleor if error gets thrown', function() {
1809                 var doc = getDocumentFromXML('<root></root>'),
1810                     err = new Error(),
1811                     spy = sinon.spy();
1812
1813                 doc.transaction(function() {
1814                     doc.root.append({tagName: 'div'});
1815                     throw err;
1816                 }, {error: spy});
1817
1818                 expect(spy.args[0][0]).to.equal(err);
1819                 expect(doc.root.contents().length).to.equal(0);
1820                 expect(doc.undoStack.length).to.equal(0);
1821             });
1822         });
1823
1824         describe('Regression tests', function() {
1825             it('redos correctly after running its own undo followed by unaware transformation undo', function() {
1826                 var doc = getDocumentFromXML('<section t="0"></section>');
1827
1828                 doc.registerExtension({elementNode: {transformations: {
1829                     unaware: function() {
1830                         this.triggerChangeEvent();
1831                     },
1832                     test: {
1833                         impl: function() {
1834                             this._$.attr('t', 1);
1835                             this.triggerChangeEvent();
1836                         },
1837                         undo: function() {
1838                             this._$.attr('t', 0);
1839                         }
1840                     }
1841                 }}});
1842                 doc.root.unaware();
1843                 doc.root.test();
1844                 doc.undo();
1845                 doc.undo();
1846                 doc.redo();
1847                 doc.redo();
1848                 expect(doc.root.getAttr('t')).to.equal('1');
1849             });
1850             it('can perform undo of an operation performed after automatic transaction rollback', function() {
1851                 var doc = getDocumentFromXML('<section></section>'),
1852                     extension = {document: {transformations: {
1853                         throwingTransformation: function() { throw new Error(); }
1854                     }}};
1855
1856                 doc.registerExtension(extension);
1857
1858                 doc.throwingTransformation();
1859
1860                 doc.transaction(function() {
1861                     doc.root.setAttr('x', '2');
1862                 });
1863
1864                 expect(doc.undoStack.length).to.equal(1);
1865                 expect(doc.root.getAttr('x')).to.equal('2');
1866
1867                 doc.undo();
1868
1869                 expect(doc.undoStack.length).to.equal(0);
1870                 expect(doc.root.getAttr('x')).to.be.undefined;
1871
1872             });
1873         });
1874     });
1875
1876 });
1877
1878 });