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