X-Git-Url: https://git.mdrn.pl/fnpeditor.git/blobdiff_plain/6435513192b5be363719dcb1559c93b52944800d..2f7b77263681f9b09078a958b9bca816b7086094:/modules/documentCanvas/canvas/canvas.test3.js?ds=inline

diff --git a/modules/documentCanvas/canvas/canvas.test3.js b/modules/documentCanvas/canvas/canvas.test3.js
index f270328..95698d0 100644
--- a/modules/documentCanvas/canvas/canvas.test3.js
+++ b/modules/documentCanvas/canvas/canvas.test3.js
@@ -1,14 +1,77 @@
 define([
 'libs/chai',
+'libs/sinon',
 'modules/documentCanvas/canvas/canvas',
 'modules/documentCanvas/canvas/documentElement'
-], function(chai, canvas, documentElement) {
+], function(chai, sinon, canvas, documentElement) {
     
 'use strict';
 
 var expect = chai.expect;
 
+
 describe('Canvas', function() {
+
+    describe('Internal HTML representation of a sample document', function() {
+        it('works', function() {
+            var c = canvas.fromXML('\
+                <section>\
+                    This is some text without its own wrapping tag.\
+                    <div class="p.subclass">\
+                        This is a paragraph.\
+                    </div>\
+                    <div>\
+                        This is text in a div <span>with some inline text</span>.\
+                    </div>\
+                    This is some text without its own wrapping tag.\
+                </section>\
+            ');
+            var expected = '<div wlxml-tag="section">'
+                            + '<div wlxml-text>This is some text without its own wrapping tag.</div>'
+                            + '<div wlxml-tag="div" wlxml-class="p-subclass">'
+                            +   '<div wlxml-text>This is a paragraph.</div>'
+                            + '</div>'
+                            + '<div wlxml-tag="div">'
+                            +   '<div wlxml-text>This is text in a div </div>'
+                            +   '<div wlxml-tag="span">'
+                            +       '<div wlxml-text>with some inline text</div>'
+                            +   '</div>'
+                            +   '<div wlxml-text>.</div>'
+                            + '</div>'
+                            + '<div wlxml-text>This is some text without its own wrapping tag.</div>'
+                            + '</div>';
+            expect(c.doc().dom()[0].isEqualNode($(expected)[0])).to.be.true;
+        });
+    });
+
+    describe('Internal HTML representation of a DocumentNodeElement', function() {
+        it('is always a div tag', function() {
+            ['section', 'header', 'span', 'aside', 'figure'].forEach(function(tagName) {
+                var dom = canvas.fromXML('<' + tagName + '></' + tagName + '>').doc().dom();
+                expect(dom.prop('tagName')).to.equal('DIV', tagName + ' is represented as div');
+            });
+        });
+        it('has wlxml tag put into wlxml-tag attribute', function() {
+            var dom = canvas.fromXML('<section></section>').doc().dom();
+            expect(dom.attr('wlxml-tag')).to.equal('section');
+        });
+        it('has wlxml class put into wlxml-class, dots replaced with dashes', function() {
+            var dom = canvas.fromXML('<section class="some.class"></section>').doc().dom();
+            expect(dom.attr('wlxml-class')).to.equal('some-class');
+        });
+    });
+
+    describe('Internal HTML representation of a DocumentTextElement', function() {
+        it('is text node wrapped in a div with wlxml-text attribute set', function() {
+            var dom = canvas.fromXML('<section>Alice</section>').doc().children()[0].dom();
+            expect(dom.prop('tagName')).to.equal('DIV');
+            expect(dom.attr('wlxml-text')).to.equal('');
+            expect(dom.contents().length).to.equal(1);
+            expect(dom.contents()[0].nodeType).to.equal(Node.TEXT_NODE);
+            expect($(dom.contents()[0]).text()).to.equal('Alice');
+        });
+    });
+
     describe('basic properties', function() {
         it('renders empty document when canvas created from empty XML', function() {
             var c = canvas.fromXML('');
@@ -17,11 +80,108 @@ describe('Canvas', function() {
 
         it('gives access to its document root node', function() {
             var c = canvas.fromXML('<section></section>');
-            expect(c.doc().wlxmlTag).to.equal('section');
+            expect(c.doc().getWlxmlTag()).to.equal('section');
+        });
+
+        describe('root element', function() {
+            it('has no parent', function() {
+                var c = canvas.fromXML('<section></section>');
+                expect(c.doc().parent()).to.be.null;
+            });
+        });
+
+        describe('DocumentTextElement', function() {
+            it('can have its content set', function() {
+                var c = canvas.fromXML('<section>Alice</section>'),
+                    root = c.doc(),
+                    text = root.children()[0];
+                
+                text.setText('a cat');
+                expect(root.children()[0].getText()).to.equal('a cat');
+            });
+        });
+
+        describe('DocumentNodeElement', function() {
+            it('knows index of its child', function() {
+                var c = canvas.fromXML('<section><div></div><header></header><span></span></section>'),
+                    root = c.doc(),
+                    child = root.children()[1];
+                expect(root.childIndex(child)).to.equal(1);
+            });
+
+            it('knows WLXML tag it renders', function(){
+                var c = canvas.fromXML('<section></section>'),
+                    section = c.doc();
+                expect(section.getWlxmlTag()).to.equal('section', 'initial tag is section');
+                section.setWlxmlTag('header');
+                expect(section.getWlxmlTag()).to.equal('header', 'tag is changed to header');
+            });
+
+            it('knows WLXML class of a WLXML tag it renders', function(){
+                var c = canvas.fromXML('<section class="some.class.A"></section>'),
+                    section = c.doc();
+                expect(section.getWlxmlClass()).to.equal('some.class.A');
+                section.setWlxmlClass('some.class.B');
+                expect(section.getWlxmlClass()).to.equal('some.class.B');
+                section.setWlxmlClass(null);
+                expect(section.getWlxmlClass()).to.be.undefined;
+            });
+
+
+
+            describe('element has meta attributes', function() {
+                it('can change its meta attributes', function() {
+                    var c = canvas.fromXML('<section><span class="uri" meta-uri="someuri"></span></section>'),
+                    span = c.doc().children()[0];
+                    
+                    expect(span.getWlxmlMetaAttr('uri')).to.equal('someuri');
+                    span.setWlxmlMetaAttr('uri', 'otheruri');
+                    expect(span.getWlxmlMetaAttr('uri')).to.equal('otheruri');
+                });
+
+                it('changes its meta attributes with class change', function() {
+                    var c = canvas.fromXML('<section><span class="uri" meta-uri="someuri"></span></section>'),
+                    span = c.doc().children()[0];
+                    
+                    expect(span.getWlxmlMetaAttr('uri')).to.equal('someuri');
+                    span.setWlxmlClass('author');
+                    expect(span.getWlxmlMetaAttr('uri')).to.be.undefined;
+                });
+
+                it('keeps meta attribute value on class change if a new class has this attribute', function() {
+                    var c = canvas.fromXML('<section><span class="uri" meta-uri="someuri"></span></section>'),
+                    span = c.doc().children()[0];
+                    span.setWlxmlClass('uri.some.subclass');
+                    expect(span.getWlxmlMetaAttr('uri')).to.equal('someuri');
+                });
+            });
+        });
+
+        it('returns DocumentNodeElement instance from HTMLElement', function() {
+            var c = canvas.fromXML('<section></section>'),
+                htmlElement = c.doc().dom().get(0),
+                element = c.getDocumentElement(htmlElement);
+            expect(element).to.be.instanceOf(documentElement.DocumentNodeElement);
+            expect(element.sameNode(c.doc()));
+        });
+        
+        it('returns DocumentTextElement instance from Text Node', function() {
+            var c = canvas.fromXML('<section>Alice</section>'),
+                aliceElement = c.doc().children()[0],
+                textNode = aliceElement.dom().contents()[0],
+                element = c.getDocumentElement(textNode);
+
+            expect(textNode.nodeType).to.equal(Node.TEXT_NODE, 'text node selected');
+            expect($(textNode).text()).to.equal('Alice');
+
+            expect(element).to.be.instanceOf(documentElement.DocumentTextElement);
+            expect(element.sameNode(c.doc().children()[0]));
         });
     });
 
-    describe('document api', function() {
+
+
+    describe('document representation api', function() {
         describe('document root element', function() {
             var c = canvas.fromXML('<section></section>');
             it('exists', function() {
@@ -32,38 +192,1090 @@ describe('Canvas', function() {
             });
         });
 
-        it('a', function() {
-            var c = canvas.fromXML('<section><div></div></section>'),
-                children = c.doc().children();
-            expect(children.length).to.equal(3);
-            expect(children[0]).to.be.instanceOf(documentElement.DocumentTextElement);
-            expect(children[1]).to.be.instanceOf(documentElement.DocumentNodeElement);
-            expect(children[2]).to.be.instanceOf(documentElement.DocumentTextElement);
+        describe('DocumentElements comparison', function() {
+            it('reports dwo DocumentElements to be the same when they represent the same wlxml document element', function() {
+                var c = canvas.fromXML('<section><div></div><div></div></section>'),
+                    first_div1 = c.doc().children()[0],
+                    first_div2 = c.doc().children()[0],
+                    second_div = c.doc().children()[1];
+                expect(first_div1.sameNode(first_div1)).to.be.true;
+                expect(first_div1.sameNode(first_div2)).to.be.true;
+                expect(first_div1.sameNode(second_div)).to.be.false;
+            });
+        });
+
+        describe('traversing', function() {
+            it('reports element nodes', function() {
+                var c = canvas.fromXML('<section><div></div></section>'),
+                    children = c.doc().children();
+                expect(children.length).to.equal(1);
+                expect(children[0]).to.be.instanceOf(documentElement.DocumentNodeElement);
+
+                c = canvas.fromXML('<section><div></div><div></div></section>'),
+                    children = c.doc().children();
+                expect(children.length).to.equal(2);
+                expect(children[0]).to.be.instanceOf(documentElement.DocumentNodeElement);
+                expect(children[1]).to.be.instanceOf(documentElement.DocumentNodeElement);
+            });
+            
+            it('reports text nodes', function() {
+                var c = canvas.fromXML('<section>Alice</section>'),
+                    children = c.doc().children();
+                expect(children.length).to.equal(1);
+                expect(children[0]).to.be.instanceOf(documentElement.DocumentTextElement);
+            });
+
+            describe('accessing parents', function() {
+                it('returns DocumentNodeElement representing parent in wlxml document as DocumentNodeElement parent', function() {
+                    var c = canvas.fromXML('<section><div></div></section>'),
+                        div = c.doc().children()[0];
+                    expect(div.parent().sameNode(c.doc())).to.be.true;
+                });
+                it('returns DocumentNodeElement representing parent in wlxml document as DocumentTextElement parent', function() {
+                    var c = canvas.fromXML('<section>Alice</section>'),
+                        text = c.doc().children()[0];
+                    expect(text.parent().sameNode(c.doc())).to.be.true;
+                });
+            });
+
+            describe('free text handling', function() {
+                    it('sees free text', function() {
+                        var c = canvas.fromXML('<section>Alice <span>has</span> a cat</section>'),
+                            children = c.doc().children();
+                        expect(children.length).to.equal(3);
+                        expect(children[0]).to.be.instanceOf(documentElement.DocumentTextElement);
+                        expect(children[1]).to.be.instanceOf(documentElement.DocumentNodeElement);
+                        expect(children[2]).to.be.instanceOf(documentElement.DocumentTextElement);
+                    });
+            });
+            
+            describe('white characters handling', function() {
+                it('says empty element node has no children', function() {
+                    var c = canvas.fromXML('<section></section>');
+                    expect(c.doc().children().length).to.equal(0);
+                });
+                it('says element node with one space has one DocumentTextElement', function() {
+                    var c = canvas.fromXML('<section> </section>');
+                    expect(c.doc().children().length).to.equal(1);
+                    expect(c.doc().children()[0]).to.be.instanceOf(documentElement.DocumentTextElement);
+                    expect(c.doc().children()[0].getText()).to.equal(' ');
+                });
+                it('ignores white space surrounding block elements', function() {
+                    var c = canvas.fromXML('<section> <div></div> </section>');
+                    var children = c.doc().children();
+                    expect(children.length).to.equal(1);
+                    expect(children[0]).to.be.instanceOf(documentElement.DocumentNodeElement);
+                });
+                it('ignores white space between block elements', function() {
+                    var c = canvas.fromXML('<section><div></div> <div></div></section>');
+                    var children = c.doc().children();
+                    expect(children.length === 2);
+                    [0,1].forEach(function(idx) {
+                        expect(children[idx]).to.be.instanceOf(documentElement.DocumentNodeElement);
+                    });
+                });
+
+                it('trims white space from the beginning and the end of the block elements', function() {
+                    var c = canvas.fromXML('<section> Alice <span>has</span> a cat </section>');
+                    expect(c.doc().children()[0].getText()).to.equal('Alice ');
+                    expect(c.doc().children()[2].getText()).to.equal(' a cat');
+                });
+
+                it('normalizes string of white characters to one space at the inline element boundries', function() {
+                    var c = canvas.fromXML('<span>   Alice has a cat   </span>');
+                    expect(c.doc().children()[0].getText()).to.equal(' Alice has a cat ');
+                });
+
+                it('normalizes string of white characters to one space before inline element', function() {
+                    var c = canvas.fromXML('<div>Alice has  <span>a cat</span></div>');
+                    expect(c.doc().children()[0].getText()).to.equal('Alice has ');
+                });
+                
+                it('normalizes string of white characters to one space after inline element', function() {
+                    var c = canvas.fromXML('<div>Alice has <span>a</span>  cat</div>');
+                    expect(c.doc().children()[2].getText()).to.equal(' cat');
+                });
+            });
+
+            describe('getting vertically first text element', function() {
+                it('returns the first child if it\'s text element, ignores metadata', function() {
+                    var c = canvas.fromXML('<section><metadata><dc:author>author</dc:author></metadata>Alice<div>has</div>a cat</section>'),
+                        first = c.doc().getVerticallyFirstTextElement();
+
+                    expect(first.sameNode(c.doc().children()[1])).to.be.true;
+                });
+
+                it('looks recursively inside node elements if they precede text element', function() {
+                    var c = canvas.fromXML('\
+                            <section>\
+                                <div>\
+                                    <div>\
+                                        Alice\
+                                    </div>\
+                                </div>\
+                                Some text\
+                            </section>'),
+                        textAlice = c.doc().children()[0].children()[0].children()[0],
+                        first = c.doc().getVerticallyFirstTextElement();
+
+                    expect(textAlice).to.be.instanceOf(documentElement.DocumentTextElement);
+                    expect(first.sameNode(textAlice)).to.be.true;
+                });
+            });
+        });
+
+        describe('manipulation api', function() {
+
+            describe('Basic Element inserting', function() {
+                it('can put new NodeElement at the end', function() {
+                    var c = canvas.fromXML('<section></section>'),
+                        appended = c.doc().append({tag: 'header', klass: 'some.class'}),
+                        children = c.doc().children();
+
+                    expect(children.length).to.equal(1);
+                    expect(children[0].sameNode(appended)).to.be.true;
+                });
+
+                it('can put new TextElement at the end', function() {
+                    var c = canvas.fromXML('<section></section>'),
+                        appended = c.doc().append({text: 'Alice'}),
+                        children = c.doc().children();
+
+                    expect(children.length).to.equal(1);
+                    expect(children[0].sameNode(appended)).to.be.true;
+                    expect(children[0].getText()).to.equal('Alice');
+                });
+
+                it('can put new NodeElement after another NodeElement', function() {
+                    var c = canvas.fromXML('<section><div></div></section>'),
+                        div = c.doc().children()[0],
+                        added = div.after({tag: 'header', klass: 'some.class'}),
+                        children = c.doc().children();
+                    expect(children.length).to.equal(2);
+                    expect(children[1].sameNode(added)).to.be.true;
+                });
+
+                it('can put new Nodeelement before another element', function() {
+                    var c = canvas.fromXML('<section><div></div></section>'),
+                        div = c.doc().children()[0],
+                        added = div.before({tag: 'header', klass: 'some.class'}),
+                        children = c.doc().children();
+                    expect(children.length).to.equal(2);
+                    expect(children[0].sameNode(added)).to.be.true;
+                });
+
+                it('can put new DocumentNodeElement after DocumentTextElement', function() {
+                    var c = canvas.fromXML('<section>Alice</section>'),
+                        text = c.doc().children()[0],
+                        added = text.after({tag: 'p'}),
+                        children = c.doc().children();
+
+                    expect(children.length).to.equal(2);
+                    expect(children[0]).to.be.instanceOf(documentElement.DocumentTextElement);
+                    expect(children[0].getText()).to.equal('Alice');
+                    expect(children[1]).to.be.instanceOf(documentElement.DocumentNodeElement);
+                    expect(children[1].sameNode(added)).to.be.true;
+                });
+                it('can put new DocumentNodeElement before DocumentTextElement', function() {
+                    var c = canvas.fromXML('<section>Alice</section>'),
+                        text = c.doc().children()[0],
+                        added = text.before({tag: 'p'}),
+                        children = c.doc().children();
+
+                    expect(children.length).to.equal(2);
+                    expect(children[0]).to.be.instanceOf(documentElement.DocumentNodeElement);
+                    expect(children[0].sameNode(added)).to.be.true;
+                    expect(children[1]).to.be.instanceOf(documentElement.DocumentTextElement);
+                    expect(children[1].getText()).to.equal('Alice');
+                });
+
+                it('can divide DocumentTextElement with a new DocumentNodeElement', function() {
+                    var c = canvas.fromXML('<section>Alice has a cat</section>'),
+                        section = c.doc(),
+                        text = section.children()[0];
+
+                    var returned = text.divide({tag: 'aside', klass: 'footnote', offset: 5}),
+                        sectionChildren = section.children(),
+                        lhsText = sectionChildren[0],
+                        rhsText = sectionChildren[2];
+
+                    expect(lhsText.getText()).to.equal('Alice');
+                    expect(returned.sameNode(sectionChildren[1]));
+                    expect(rhsText.getText()).to.equal(' has a cat');
+                });
+            });
+
+            describe('Splitting text', function() {
+                
+                it('splits DocumentTextElement\'s parent into two DocumentNodeElements of the same type', function() {
+                    var c = canvas.fromXML('<section><header>Some header</header></section>'),
+                        section = c.doc(),
+                        text = section.children()[0].children()[0];
+
+                    var returnedValue = text.split({offset: 5});
+                    expect(section.children().length).to.equal(2, 'section has two children');
+                    
+                    var header1 = section.children()[0];
+                    var header2 = section.children()[1];
+
+                    expect(header1.getWlxmlTag()).to.equal('header', 'first section child represents wlxml header');
+                    expect(header1.children().length).to.equal(1, 'first header has one text child');
+                    expect(header1.children()[0].getText()).to.equal('Some ', 'first header has correct content');
+                    expect(header2.getWlxmlTag()).to.equal('header', 'second section child represents wlxml header');
+                    expect(header2.children().length).to.equal(1, 'second header has one text child');
+                    expect(header2.children()[0].getText()).to.equal('header', 'second header has correct content');
+
+                    expect(returnedValue.first.sameNode(header1)).to.equal(true, 'first node returnde');
+                    expect(returnedValue.second.sameNode(header2)).to.equal(true, 'second node returned');
+                });
+
+                it('leaves empty copy of DocumentNodeElement if splitting at the very beginning', function() {
+                        var c = canvas.fromXML('<section><header>Some header</header></section>'),
+                        section = c.doc(),
+                        text = section.children()[0].children()[0];
+
+                        text.split({offset: 0});
+                        
+                        var header1 = section.children()[0];
+                        var header2 = section.children()[1];
+
+                        expect(header1.children().length).to.equal(0);
+                        expect(header2.children()[0].getText()).to.equal('Some header');
+                });
+
+                it('leaves empty copy of DocumentNodeElement if splitting at the very end', function() {
+                        var c = canvas.fromXML('<section><header>Some header</header></section>'),
+                        section = c.doc(),
+                        text = section.children()[0].children()[0];
+
+                        text.split({offset: 11});
+                        
+                        var header1 = section.children()[0];
+                        var header2 = section.children()[1];
+
+                        expect(header1.children()[0].getText()).to.equal('Some header');
+                        expect(header2.children().length).to.equal(0);
+                });
+
+                it('keeps DocumentTextElement\'s parent\'s children elements intact', function() {
+                    var c = canvas.fromXML('\
+                            <section>\
+                                <header>\
+                                    A <span>fancy</span> and <span>nice</span> header\
+                                </header>\
+                            </section>'),
+                        section = c.doc(),
+                        header = section.children()[0],
+                        textAnd = header.children()[2];
+
+                    textAnd.split({offset: 2});
+                    
+                    var sectionChildren = section.children();
+                    expect(sectionChildren.length).to.equal(2, 'Section has two children');
+                    expect(sectionChildren[0].getWlxmlTag()).to.equal('header', 'First section element is a wlxml header');
+                    expect(sectionChildren[1].getWlxmlTag()).to.equal('header', 'Second section element is a wlxml header');
+
+                    var firstHeaderChildren = sectionChildren[0].children();
+                    expect(firstHeaderChildren.length).to.equal(3, 'First header has three children');
+                    expect(firstHeaderChildren[0].getText()).to.equal('A ', 'First header starts with a text');
+                    expect(firstHeaderChildren[1].getWlxmlTag()).to.equal('span', 'First header has span in the middle');
+                    expect(firstHeaderChildren[2].getText()).to.equal(' a', 'First header ends with text');
+
+                    var secondHeaderChildren = sectionChildren[1].children();
+                    expect(secondHeaderChildren.length).to.equal(3, 'Second header has three children');
+                    expect(secondHeaderChildren[0].getText()).to.equal('nd ', 'Second header starts with text');
+                    expect(secondHeaderChildren[1].getWlxmlTag()).to.equal('span', 'Second header has span in the middle');
+                    expect(secondHeaderChildren[2].getText()).to.equal(' header', 'Second header ends with text');
+                });
+            });
+
+            describe('wrapping', function() {
+                it('wraps DocumentNodeElement', function() {
+                    var c = canvas.fromXML('<section><div></div></section>'),
+                        div = c.doc().children()[0];
+                    
+                    var returned = div.wrapWithNodeElement({tag: 'header', klass: 'some.class'}),
+                        parent = div.parent(),
+                        parent2 = c.doc().children()[0];
+
+                    expect(returned.sameNode(parent)).to.be.true;
+                    expect(returned.sameNode(parent2)).to.be.true;
+                    expect(returned.getWlxmlTag()).to.equal('header');
+                    expect(returned.getWlxmlClass()).to.equal('some.class');
+                });
+                it('wraps DocumentTextElement', function() {
+                    var c = canvas.fromXML('<section>Alice</section>'),
+                        text = c.doc().children()[0];
+                    
+                    var returned = text.wrapWithNodeElement({tag: 'header', klass: 'some.class'}),
+                        parent = text.parent(),
+                        parent2 = c.doc().children()[0];
+
+                    expect(returned.sameNode(parent)).to.be.true;
+                    expect(returned.sameNode(parent2)).to.be.true;
+                    expect(returned.getWlxmlTag()).to.equal('header');
+                    expect(returned.getWlxmlClass()).to.equal('some.class');
+                });
+                
+                describe('wrapping part of DocumentTextElement', function() {
+                    [{start: 5, end: 12}, {start: 12, end: 5}].forEach(function(offsets) {
+                        it('wraps in the middle ' + offsets.start + '/' + offsets.end, function() {
+                            var c = canvas.fromXML('<section>Alice has a cat</section>'),
+                                text = c.doc().children()[0];
+                            
+                            var returned = text.wrapWithNodeElement({tag: 'header', klass: 'some.class', start: offsets.start, end: offsets.end}),
+                                children = c.doc().children();
+
+                            expect(children.length).to.equal(3);
+                            
+                            expect(children[0]).to.be.instanceOf(documentElement.DocumentTextElement);
+                            expect(children[0].getText()).to.equal('Alice');
+
+                            expect(children[1].sameNode(returned)).to.be.true;
+                            expect(returned.getWlxmlTag()).to.equal('header');
+                            expect(returned.getWlxmlClass()).to.equal('some.class');
+                            expect(children[1].children().length).to.equal(1);
+                            expect(children[1].children()[0].getText()).to.equal(' has a ');
+
+                            expect(children[2]).to.be.instanceOf(documentElement.DocumentTextElement);
+                            expect(children[2].getText()).to.equal('cat');
+                        });
+                    });
+
+                    it('wraps whole text inside DocumentTextElement if offsets span entire content', function() {
+                         var c = canvas.fromXML('<section>Alice has a cat</section>'),
+                             text = c.doc().children()[0];
+                         
+                         var returned = text.wrapWithNodeElement({tag: 'header', klass: 'some.class', start: 0, end: 15}),
+                             children = c.doc().children();
+
+                         expect(children.length).to.equal(1);
+                         expect(children[0]).to.be.instanceOf(documentElement.DocumentNodeElement);
+                         expect(children[0].children()[0].getText()).to.equal('Alice has a cat');
+                    });
+                });
+
+                it('wraps text spanning multiple sibling DocumentTextNodes', function() {
+                    var c = canvas.fromXML('<section>Alice has a <span>small</span> cat</section>'),
+                        section = c.doc(),
+                        wrapper = c.wrapText({
+                            inside: section, 
+                            _with: {tag: 'span', klass: 'some.class'},
+                            offsetStart: 6,
+                            offsetEnd: 4,
+                            textNodeIdx: [0,2]
+                        });
+
+                    expect(section.children().length).to.equal(2);
+                    expect(section.children()[0]).to.be.instanceOf(documentElement.DocumentTextElement);
+                    expect(section.children()[0].getText()).to.equal('Alice ');
+
+                    var wrapper2 = section.children()[1];
+                    expect(wrapper2.sameNode(wrapper)).to.be.true;
+
+                    var wrapperChildren = wrapper.children();
+                    expect(wrapperChildren.length).to.equal(3);
+                    expect(wrapperChildren[0].getText()).to.equal('has a ');
+
+                    expect(wrapperChildren[1]).to.be.instanceOf(documentElement.DocumentNodeElement);
+                    expect(wrapperChildren[1].children().length).to.equal(1);
+                    expect(wrapperChildren[1].children()[0].getText()).to.equal('small');
+
+                    expect(wrapperChildren[2].getText()).to.equal(' cat');
+                });
+            });
+
+            describe('unwrapping', function() {
+                it('unwraps DocumentTextElement from its parent DocumentNodeElement if it\'s its only child', function() {
+                    var c = canvas.fromXML('<section>Alice <span>has a</span> cat</section>'),
+                    section = c.doc(),
+                    text = section.children()[1].children()[0];
+
+                    var newTextContainer = text.unwrap();
+
+                    expect(section.children().length).to.equal(1, 'section has one child');
+                    expect(section.children()[0].getText()).to.equal('Alice has a cat');
+                    expect(newTextContainer.sameNode(c.doc())).to.equal(true, 'unwrap returns new text parent DocumentNodeElement');
+                })
+            });
+        });
+
+        describe('Lists api', function() {
+            describe('creating lists', function() {
+                it('allows creation of a list from existing sibling DocumentElements', function() {
+                    var c = canvas.fromXML('\
+                        <section>\
+                            Alice\
+                            <div>has</div>\
+                            a\
+                            <div>cat</div>\
+                        </section>'),
+                        section = c.doc(),
+                        textHas = section.children()[1],
+                        divA = section.children()[2]
+                    
+                    c.list.create({element1: textHas, element2: divA});
+
+                    expect(section.children().length).to.equal(3, 'section has three child elements');
+
+                    var child1 = section.children()[0],
+                        list = section.children()[1],
+                        child3 = section.children()[2];
+
+                    expect(child1.getText()).to.equal('Alice');
+                    expect(list.is('list')).to.equal(true, 'second child is a list');
+                    expect(list.children().length).to.equal(2, 'list contains two elements');
+                    list.children().forEach(function(child) {
+                        expect(child.getWlxmlClass()).to.equal('item', 'list childs have wlxml class of item');
+                    });
+                    expect(child3.children()[0].getText()).to.equal('cat');
+                });
+                
+                it('allows creating nested list from existing sibling list items', function() {
+                    var c = canvas.fromXML('\
+                        <section>\
+                            <div class="list-items">\
+                                <div class="item">A</div>\
+                                <div class="item">B</div>\
+                                <div class="item">C</div>\
+                                <div class="item">D</div>\
+                            </div>\
+                        </section>'),
+                        outerList = c.doc().children()[0],
+                        itemB = outerList.children()[1],
+                        itemC = outerList.children()[2];
+
+
+                        c.list.create({element1: itemB, element2: itemC});
+
+                    var outerListItems = outerList.children(),
+                        innerList = outerListItems[1].children()[0],
+                        innerListItems = innerList.children();
+
+                    expect(outerListItems.length).to.equal(3, 'outer list has three items');
+                    expect(outerListItems[0].children()[0].getText()).to.equal('A', 'first outer item ok');
+                    expect(outerListItems[1].getWlxmlClass()).to.equal('item', 'inner list is wrapped by item element');
+
+                    expect(innerList.is('list')).to.equal(true, 'inner list created');
+                    expect(innerListItems.length).to.equal(2, 'inner list has two items');
+                    expect(innerListItems[0].children()[0].getText()).to.equal('B', 'first inner item ok');
+                    expect(innerListItems[1].children()[0].getText()).to.equal('C', 'second inner item ok');
+
+                    expect(outerListItems[2].children()[0].getText()).to.equal('D', 'last outer item ok');
+
+                });
+
+            });
+
+            describe('extracting list items', function() {
+                it('creates two lists with extracted items in the middle if extracting from the middle of the list', function() {
+                    var c = canvas.fromXML('\
+                        <section>\
+                            <div class="list.items">\
+                                <div class="item">0</div>\
+                                <div class="item">1</div>\
+                                <div class="item">2</div>\
+                                <div class="item">3</div>\
+                            </div>\
+                        </section>'),
+                        list = c.doc().children()[0],
+                        item1 = list.children()[1],
+                        item2 = list.children()[2];
+
+                    c.list.extractItems({element1: item1, element2: item2});
+
+                    var section = c.doc(),
+                        list1 = section.children()[0],
+                        oldItem1 = section.children()[1],
+                        oldItem2 = section.children()[2],
+                        list2 = section.children()[3];
+
+                    expect(section.children().length).to.equal(4, 'section contains four children');
+                    
+                    expect(list1.is('list')).to.equal(true, 'first section child is a list');
+                    expect(list1.children().length).to.equal(1, 'first list has one child');
+                    expect(list1.children()[0].children()[0].getText()).to.equal('0', 'first item of the first list is a first item of the original list');
+
+                    expect(oldItem1.children()[0].getText()).to.equal('1', 'first item got extracted');
+                    expect(oldItem1.getWlxmlClass() === undefined).to.equal(true, 'first extracted element has no wlxml class');
+
+                    expect(oldItem2.children()[0].getText()).to.equal('2', 'second item got extracted');
+                    expect(oldItem2.getWlxmlClass() === undefined).to.equal(true, 'second extracted element has no wlxml class');
+
+                    expect(list2.is('list')).to.equal(true, 'last section child is a list');
+                    expect(list2.children().length).to.equal(1, 'second list has one child');
+                    expect(list2.children()[0].children()[0].getText()).to.equal('3', 'first item of the second list is a last item of the original list');
+                });
+
+                it('puts extracted items above the list if starting item is the first one', function() {
+                    var c = canvas.fromXML('\
+                        <section>\
+                            <div class="list.items">\
+                                <div class="item">0</div>\
+                                <div class="item">1</div>\
+                                <div class="item">2</div>\
+                            </div>\
+                        </section>'),
+                        list = c.doc().children()[0],
+                        item1 = list.children()[0],
+                        item2 = list.children()[1],
+                        item3 = list.children()[2];
+
+                    c.list.extractItems({element1: item1, element2: item2});
+
+                    var section = c.doc(),
+                        oldItem1 = section.children()[0],
+                        oldItem2 = section.children()[1],
+                        newList = section.children()[2];
+
+                    expect(section.children().length).to.equal(3, 'section has three children');
+                    expect(oldItem1.children()[0].getText()).to.equal('0', 'first item extracted');
+                    expect(oldItem2.children()[0].getText()).to.equal('1', 'second item extracted');
+                    expect(newList.is('list')).to.equal(true, 'list lies below extracted item');
+                    expect(newList.children().length).to.equal(1, 'list has now one child');
+                });
+
+                it('puts extracted items below the list if ending item is the last one', function() {
+                    var c = canvas.fromXML('\
+                        <section>\
+                            <div class="list.items">\
+                                <div class="item">0</div>\
+                                <div class="item">1</div>\
+                                <div class="item">2</div>\
+                            </div>\
+                        </section>'),
+                        list = c.doc().children()[0],
+                        item1 = list.children()[0],
+                        item2 = list.children()[1],
+                        item3 = list.children()[2];
+
+                    c.list.extractItems({element1: item2, element2: item3});
+
+                    var section = c.doc(),
+                        oldItem1 = section.children()[1],
+                        oldItem2 = section.children()[2],
+                        newList = section.children()[0];
+
+                    expect(section.children().length).to.equal(3, 'section has three children');
+                    expect(oldItem1.children()[0].getText()).to.equal('1', 'first item extracted');
+                    expect(oldItem2.children()[0].getText()).to.equal('2', 'second item extracted');
+                    expect(newList.is('list')).to.equal(true, 'list lies above extracted item');
+                    expect(newList.children().length).to.equal(1, 'list has now one child');
+                });
+
+                it('removes list if all its items are extracted', function() {
+                    var c = canvas.fromXML('\
+                        <section>\
+                            <div class="list.items">\
+                                <div class="item">some item</div>\
+                                <div class="item">some item 2</div>\
+                            </div>\
+                        </section>'),
+                        list = c.doc().children()[0],
+                        item1 = list.children()[0],
+                        item2 = list.children()[1];
+
+                    c.list.extractItems({element1: item1, element2: item2});
+
+                    var section = c.doc(),
+                        list1 = section.children()[0],
+                        oldItem1 = section.children()[0],
+                        oldItem2 = section.children()[1];
+
+                    expect(section.children().length).to.equal(2, 'section contains two children');
+                    expect(oldItem1.children()[0].getText()).to.equal('some item');
+                    expect(oldItem2.children()[0].getText()).to.equal('some item 2');
+                });
+
+                it('creates two lists with extracted items in the middle if extracting from the middle of the list - nested case' , function() {
+                    var c = canvas.fromXML('\
+                        <section>\
+                            <div class="list.items">\
+                                <div class="item">0</div>\
+                                <div class="item">\
+                                    <div class="list.items">\
+                                        <div class="item">1.1</div>\
+                                        <div class="item">1.2</div>\
+                                        <div class="item">1.3</div>\
+                                    </div>\
+                                </div>\
+                                <div class="item">2</div>\
+                            </div>\
+                        </section>'),
+                        list = c.doc().children()[0],
+                        nestedList = list.children()[1].children()[0],
+                        nestedListItem = nestedList.children()[1];
+
+                    c.list.extractItems({element1: nestedListItem, element2: nestedListItem});
+
+                    var section = c.doc(),
+                        list = section.children()[0],
+                        item1 = list.children()[0],
+                        item2 = list.children()[1], //
+                        item3 = list.children()[2],
+                        item4 = list.children()[3], //
+                        item5 = list.children()[4],
+                        nestedList1 = item2.children()[0],
+                        nestedList2 = item4.children()[0];
+
+                    expect(list.children().length).to.equal(5, 'top list has five items');
+                    
+                    expect(item1.children()[0].getText()).to.equal('0', 'first item ok');
+
+                    expect(item2.getWlxmlClass()).to.equal('item', 'first nested list is still wrapped in item element');
+                    expect(nestedList1.children().length).to.equal(1, 'first nested list is left with one child');
+                    expect(nestedList1.children()[0].children()[0].getText()).to.equal('1.1', 'first nested list item left alone');
+                    
+                    expect(item3.children()[0].getText()).to.equal('1.2', 'third item ok');
+
+                    expect(item4.getWlxmlClass()).to.equal('item', 'second nested list is still wrapped in item element');
+                    expect(nestedList2.children().length).to.equal(1, 'second nested list is left with one child');
+                    expect(nestedList2.children()[0].children()[0].getText()).to.equal('1.3', 'second nested list item left alone');
+
+                    expect(item5.children()[0].getText()).to.equal('2', 'last item ok');
+                });
+
+                it('puts extracted items below the list if ending item is the last one - nested case' , function() {
+                    var c = canvas.fromXML('\
+                        <section>\
+                            <div class="list.items">\
+                                <div class="item">0</div>\
+                                <div class="item">\
+                                    <div class="list.items">\
+                                        <div class="item">1.1</div>\
+                                        <div class="item">1.2</div>\
+                                        <div class="item">1.3</div>\
+                                    </div>\
+                                </div>\
+                                <div class="item">2</div>\
+                            </div>\
+                        </section>'),
+                        list = c.doc().children()[0],
+                        nestedList = list.children()[1].children()[0],
+                        nestedListItem1 = nestedList.children()[1],
+                        nestedListItem2 = nestedList.children()[2];
+
+                    c.list.extractItems({element1: nestedListItem1, element2: nestedListItem2});
+
+                    var section = c.doc(),
+                        list = section.children()[0],
+                        item1 = list.children()[0],
+                        item2 = list.children()[1],
+                        item3 = list.children()[2],
+                        item4 = list.children()[3],
+                        item5 = list.children()[4];
+                    nestedList = item2.children()[0];
+
+                    expect(list.children().length).to.equal(5, 'top list has five items');
+                    expect(item1.children()[0].getText()).to.equal('0', 'first item ok');
+                    expect(item2.getWlxmlClass()).to.equal('item', 'nested list is still wrapped in item element');
+                    expect(nestedList.children().length).to.equal(1, 'nested list is left with one child');
+                    expect(nestedList.children()[0].children()[0].getText()).to.equal('1.1', 'nested list item left alone');
+                    expect(item3.children()[0].getText()).to.equal('1.2', 'third item ok');
+                    expect(item4.children()[0].getText()).to.equal('1.3', 'fourth item ok');
+                    expect(item5.children()[0].getText()).to.equal('2', 'fifth item ok');
+                });
+
+                it('puts extracted items above the list if starting item is the first one - nested case' , function() {
+                    var c = canvas.fromXML('\
+                        <section>\
+                            <div class="list.items">\
+                                <div class="item">0</div>\
+                                <div class="item">\
+                                    <div class="list.items">\
+                                        <div class="item">1.1</div>\
+                                        <div class="item">1.2</div>\
+                                        <div class="item">1.3</div>\
+                                    </div>\
+                                </div>\
+                                <div class="item">2</div>\
+                            </div>\
+                        </section>'),
+                        list = c.doc().children()[0],
+                        nestedList = list.children()[1].children()[0],
+                        nestedListItem1 = nestedList.children()[0],
+                        nestedListItem2 = nestedList.children()[1];
+
+                    c.list.extractItems({element1: nestedListItem1, element2: nestedListItem2});
+
+                    var section = c.doc(),
+                        list = section.children()[0],
+                        item1 = list.children()[0],
+                        item2 = list.children()[1],
+                        item3 = list.children()[2],
+                        item4 = list.children()[3],
+                        item5 = list.children()[4];
+                    nestedList = item4.children()[0];
+
+                    expect(list.children().length).to.equal(5, 'top list has five items');
+                    expect(item1.children()[0].getText()).to.equal('0', 'first item ok');
+                    expect(item2.children()[0].getText()).to.equal('1.1', 'second item ok');
+                    expect(item3.children()[0].getText()).to.equal('1.2', 'third item ok');
+                    
+                    expect(item4.getWlxmlClass()).to.equal('item', 'nested list is still wrapped in item element');
+                    expect(nestedList.children().length).to.equal(1, 'nested list is left with one child');
+                    expect(nestedList.children()[0].children()[0].getText()).to.equal('1.3', 'nested list item left alone');
+                    expect(item5.children()[0].getText()).to.equal('2', 'fifth item ok');
+                });
+
+                it('removes list if all its items are extracted - nested case', function() {
+                    var c = canvas.fromXML('\
+                        <section>\
+                            <div class="list.items">\
+                                <div class="item">0</div>\
+                                <div class="item">\
+                                    <div class="list.items">\
+                                        <div class="item">1.1</div>\
+                                        <div class="item">1.2</div>\
+                                    </div>\
+                                </div>\
+                                <div class="item">2</div>\
+                            </div>\
+                        </section>'),
+                        list = c.doc().children()[0],
+                        nestedList = list.children()[1].children()[0],
+                        nestedListItem1 = nestedList.children()[0],
+                        nestedListItem2 = nestedList.children()[1];
+
+                    c.list.extractItems({element1: nestedListItem1, element2: nestedListItem2});
+
+                    var section = c.doc(),
+                        list = section.children()[0],
+                        item1 = list.children()[0],
+                        item2 = list.children()[1],
+                        item3 = list.children()[2],
+                        item4 = list.children()[3];
+
+                    expect(list.children().length).to.equal(4, 'top list has four items');
+                    expect(item1.children()[0].getText()).to.equal('0', 'first item ok');
+                    expect(item2.children()[0].getText()).to.equal('1.1', 'second item ok');
+                    expect(item3.children()[0].getText()).to.equal('1.2', 'third item ok');
+                    expect(item4.children()[0].getText()).to.equal('2', 'fourth item ok');
+                });
+
+                it('extracts items out of outer most list when merge flag is set to false', function() {
+                    var c = canvas.fromXML('\
+                        <section>\
+                            <div class="list.items">\
+                                <div class="item">0</div>\
+                                <div class="item">\
+                                    <div class="list.items">\
+                                        <div class="item">1.1</div>\
+                                        <div class="item">1.2</div>\
+                                    </div>\
+                                </div>\
+                                <div class="item">2</div>\
+                            </div>\
+                        </section>'),
+                        section = c.doc(),
+                        list = section.children()[0],
+                        nestedList = list.children()[1].children()[0],
+                        nestedListItem = nestedList.children()[0];
+
+                    var test = c.list.extractItems({element1: nestedListItem, element2: nestedListItem, merge: false});
+
+                    expect(test).to.equal(true, 'extraction status ok');
+
+                    var sectionChildren = section.children(),
+                        extractedItem = sectionChildren[1];
+
+                    expect(sectionChildren.length).to.equal(3, 'section has three children');
+                    expect(sectionChildren[0].is('list')).to.equal(true, 'first child is a list');
+
+                    expect(extractedItem.getWlxmlTag()).to.equal('div', 'extracted item is a wlxml div');
+                    expect(extractedItem.getWlxmlClass()).to.equal(undefined, 'extracted item has no wlxml class');
+                    expect(extractedItem.children()[0].getText()).to.equal('1.1', 'extracted item ok');
+                    expect(sectionChildren[2].is('list')).to.equal(true, 'second child is a list');
+                });
+            });
+        });
+
+    });
+
+    describe('Cursor', function() {
+
+        var getSelection;
+
+        beforeEach(function() {
+            getSelection = sinon.stub(window, 'getSelection');
+        });
+
+        afterEach(function() {
+            getSelection.restore();
+        });
+
+        it('returns position when browser selection collapsed', function() {
+            var c = canvas.fromXML('<section>Alice has a cat</section>'),
+                dom = c.doc().dom(),
+                text = $(dom.contents()[0]).contents()[0];
+
+            expect(text.nodeType).to.equal(Node.TEXT_NODE, 'correct node selected');
+            expect($(text).text()).to.equal('Alice has a cat');
+
+            getSelection.returns({
+                anchorNode: text,
+                focusNode: text,
+                anchorOffset: 5,
+                focusOffset: 5,
+                isCollapsed: true
+            });
+            var cursor = c.getCursor(),
+                position = cursor.getPosition();
+
+            expect(cursor.isSelecting()).to.equal(false, 'cursor is not selecting anything');
+            expect(position.element.getText()).to.equal('Alice has a cat');
+            expect(position.offset).to.equal(5);
+            expect(position.offsetAtEnd).to.equal(false, 'offset is not at end');
+
+            getSelection.returns({
+                anchorNode: text,
+                focusNode: text,
+                anchorOffset: 15,
+                focusOffset: 15,
+                isCollapsed: true
+            });
+
+            expect(cursor.getPosition().offsetAtEnd).to.equal(true, 'offset at end');
+        });
+
+        it('returns boundries of selection when browser selection not collapsed', function() {
+            var c = canvas.fromXML('<section>Alice <span>has</span> a <span>big</span> cat</section>'),
+                dom = c.doc().dom(),
+                text = {
+                    alice: dom.contents()[0],
+                    has: $(dom.contents()[1]).contents()[0],
+                    cat: dom.contents()[4]
+                },
+                cursor = c.getCursor(),
+                aliceElement = c.getDocumentElement(text.alice),
+                catElement = c.getDocumentElement(text.cat);
+
+
+                [
+                    {focus: text.alice, focusOffset: 1, anchor: text.cat,   anchorOffset: 2, selectionAnchor: catElement},
+                    {focus: text.cat,   focusOffset: 2, anchor: text.alice, anchorOffset: 1, selectionAnchor: aliceElement}
+                ].forEach(function(s, idx) {
+                    getSelection.returns({isColapsed: false, anchorNode: s.anchor, anchorOffset: s.anchorOffset, focusNode: s.focus, focusOffset: s.focusOffset});
+
+                    var selectionStart = cursor.getSelectionStart(),
+                        selectionEnd = cursor.getSelectionEnd(),
+                        selectionAnchor = cursor.getSelectionAnchor();
+
+                    expect(cursor.isSelecting()).to.equal(true, 'cursor is selecting');
+                    expect(selectionStart.element.sameNode(aliceElement)).to.equal(true, '"Alice" is the start of the selection ' + idx);
+                    expect(selectionStart.offset).to.equal(1, '"Alice" offset ok' + idx);
+                    expect(selectionEnd.element.sameNode(catElement)).to.equal(true, '"Cat" is the start of the selection ' + idx);
+                    expect(selectionEnd.offset).to.equal(2, '"Cat" offset ok' + idx);
+                    expect(selectionAnchor.element.sameNode(s.selectionAnchor)).to.equal(true, 'anchor ok');
+                    expect(selectionAnchor.offset).to.equal(s.anchorOffset, 'anchor offset ok');
+                });
         });
 
+        it('recognizes when browser selection boundries lies in sibling DocumentTextElements', function() {
+            var c = canvas.fromXML('<section>Alice <span>has</span> a <span>big</span> cat</section>'),
+                dom = c.doc().dom(),
+                text = {
+                    alice: dom.contents()[0],
+                    has: $(dom.contents()[1]).contents()[0],
+                    a: dom.contents()[2],
+                    big: $(dom.contents()[3]).contents()[0],
+                    cat: dom.contents()[4]
+                },
+                cursor = c.getCursor();
+
+            expect($(text.alice).text()).to.equal('Alice ');
+            expect($(text.has).text()).to.equal('has');
+            expect($(text.a).text()).to.equal(' a ');
+            expect($(text.big).text()).to.equal('big');
+            expect($(text.cat).text()).to.equal(' cat');
+
+            getSelection.returns({anchorNode: text.alice, focusNode: text.a});
+            expect(cursor.isSelectingSiblings()).to.equal(true, '"Alice" and "a" are children');
+
+            getSelection.returns({anchorNode: text.alice, focusNode: text.cat});
+            expect(cursor.isSelectingSiblings()).to.equal(true, '"Alice" and "cat" are children');
+
+            getSelection.returns({anchorNode: text.alice, focusNode: text.has});
+            expect(cursor.isSelectingSiblings()).to.equal(false, '"Alice" and "has" are not children');
+
+            getSelection.returns({anchorNode: text.has, focusNode: text.big});
+            expect(cursor.isSelectingSiblings()).to.equal(false, '"has" and "big" are not children');
+            
+        })
     });
-});
 
-/*describe('Canvas', function() {
-    it('can wrap selected document nodes in a list', function() {
-        var c = canvas.fromXML('\
-            <section>\
-                <div>Alice</div>\
-                <div>has</div>\
-                <div>a cat</div>\
-            </section>
-        ');
-        var div_alice   = c.doc().children({tag: 'div'})[0];
-        var div_cat     = c.doc().children({tag: 'div'})[2];
-        c.doc.wrapInList({start: div_alice, end: div_cat});
+    describe('Serializing document to WLXML', function() {
+        it('keeps document intact when no changes have been made', function() {
+            var xmlIn = '<section>Alice<div>has</div>a <span class="uri" meta-uri="http://cat.com">cat</span>!</section>',
+                c = canvas.fromXML(xmlIn),
+                xmlOut = c.toXML();
 
-        expect(c.doc().children().length === 3)
+            var parser = new DOMParser(),
+                input = parser.parseFromString(xmlIn, "application/xml").childNodes[0],
+                output = parser.parseFromString(xmlOut, "application/xml").childNodes[0];
+            
+            expect(input.isEqualNode(output)).to.be.true;
+        });
 
+        it('keeps arbitrary node attributes intact', function() {
+            var xmlIn = '<section a="1" xmlns:dcterms="http://purl.org/dc/terms/"></section>',
+                $xmlOut = $(canvas.fromXML(xmlIn).toXML());
 
-    })
-});*/
+            expect($xmlOut.attr('a')).to.equal('1');
+            expect($xmlOut.attr('xmlns:dcterms')).to.equal('http://purl.org/dc/terms/');
+        });
+
+        it('doesn\' serialize meta attribute if its empty', function() {
+            var c;
+
+            c = canvas.fromXML('<section class="uri" meta-uri="some.uri"></section>');
+            c.doc().setWlxmlMetaAttr('uri', '');
+            expect($(c.toXML()).attr('meta-uri')).to.equal(undefined, 'overriding attribute with zero length string');
+
+            c = canvas.fromXML('<section class="uri"></section>');
+            c.doc().setWlxmlMetaAttr('uri', '');
+            expect($(c.toXML()).attr('meta-uri')).to.equal(undefined, 'setting attribute to zero length string');
+        });
+
+        describe('output xml', function() {
+            it('keeps entities intact', function() {
+                var xmlIn = '<section>&lt; &gt;</section>',
+                    c = canvas.fromXML(xmlIn),
+                    xmlOut = c.toXML();
+                expect(xmlOut).to.equal(xmlIn);
+            });
+            it('keeps entities intact when they form html/xml', function() {
+                var xmlIn = '<section>&lt;abc&gt;</section>',
+                    c = canvas.fromXML(xmlIn),
+                    xmlOut = c.toXML();
+                expect(xmlOut).to.equal(xmlIn);
+            });
+        });
+
+        describe('formatting output xml', function() {
+            /*it('keeps white spaces at the edges of input xml', function() {
+                var xmlIn = '  <section></section>  ',
+                c = canvas.fromXML(xmlIn),
+                xmlOut = c.toXML();
+
+                expect(xmlOut.substr(4)).to.equal('   <', 'start');
+                expect(xmlOut.substr(-2)).to.equal('>  ', 'end');
+            });*/
+            it('keeps white space between XML nodes', function() {
+                var xmlIn = '<section>\n\n\n<div></div>\n\n\n<div></div>\n\n\n</section>',
+                c = canvas.fromXML(xmlIn),
+                xmlOut = c.toXML();
+
+                var partsIn = xmlIn.split('\n\n\n'),
+                    partsOut = xmlOut.split('\n\n\n');
+                
+                expect(partsIn).to.deep.equal(partsOut);
+            });
+
+            it('keeps white space between XML nodes - inline case', function() {
+                var xmlIn = '<section>\n\n\n<span></span>\n\n\n<span></span>\n\n\n</section>',
+                c = canvas.fromXML(xmlIn),
+                xmlOut = c.toXML();
+
+                var partsIn = xmlIn.split('\n\n\n'),
+                    partsOut = xmlOut.split('\n\n\n');
+                
+                expect(partsIn).to.deep.equal(partsOut);
+            });
+
+            it('keeps white space at the beginning of text', function() {
+                var xmlIn = '<section>    abc<div>some div</div>    abc</section>',
+                    c = canvas.fromXML(xmlIn),
+                    xmlOut = c.toXML();
+
+                expect(xmlOut).to.equal(xmlIn);
+            });
+
+            it('nests new children block elements', function() {
+                var c = canvas.fromXML('<section></section>');
+    
+                c.doc().append({tag: 'header'});
+
+                var xmlOut = c.toXML();
+                expect(xmlOut.split('\n  ')[0]).to.equal('<section>', 'nesting start ok');
+                expect(xmlOut.split('\n').slice(-1)[0]).to.equal('</section>', 'nesting end ok');
+
+            });
+
+            it('doesn\'t nest new children inline elements', function() {
+                var c = canvas.fromXML('<section></section>');
+    
+                c.doc().append({tag: 'span'});
+
+                var xmlOut = c.toXML();
+                expect(xmlOut).to.equal('<section><span></span></section>');
+            });
+
+            it('keeps original white space at the end of text', function() {
+                
+                var xmlIn = '<header>    Some text ended with white space \
+                \
+                <span class="uri">Some text</span> some text\
+            \
+            </header>',
+                    c = canvas.fromXML(xmlIn);
+
+            var xmlOut = c.toXML();
+            console.log(xmlOut);
+            expect(xmlOut).to.equal(xmlIn);
+            });
 
+            it('keeps white space around text node', function() {
+                var xmlIn = '<section>\
+                <header>header1</header>\
+                Some text surrounded by white space\
+                <header>header2</header>\
+            </section>',
+                    c = canvas.fromXML(xmlIn);
 
+                var xmlOut = c.toXML();
+                expect(xmlOut).to.equal(xmlIn);
+            });
+
+            it('keeps white space around text node - last node case', function() {
+                var xmlIn = '<section>\
+                <header>header</header>\
+                    \
+                Some text surrounded by white space\
+                    \
+            </section>',
+                    c = canvas.fromXML(xmlIn);
+
+                var xmlOut = c.toXML();
+                expect(xmlOut).to.equal(xmlIn);
+            });
+
+            it('keeps white space after detaching text element', function() {
+                var xmlIn = '<section><header>header</header>\n\
+                    \n\
+                text1\n\
+                    \n\
+            </section>',
+                    expectedXmlOut = '<section><header>header</header>\n\
+                    \n\
+                \n\
+                    \n\
+            </section>',
+                    c = canvas.fromXML(xmlIn),
+                    children = c.doc().children(),
+                    text = children[children.length-1];
+                
+                expect(text.getText()).to.equal('text1');
+
+                text.detach();
+
+                var xmlOut = c.toXML();
+                expect(xmlOut).to.equal(expectedXmlOut);
+            });
+
+        })
+    })
+});
 
 
 });
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