X-Git-Url: https://git.mdrn.pl/fnpeditor.git/blobdiff_plain/7dc3d4d5e031615e4dd5393fe126daa7248ce184..ecf3b34e969acfeeb5d09b7287b233ce4bffed83:/modules/documentCanvas/canvas/canvas.test3.js?ds=sidebyside

diff --git a/modules/documentCanvas/canvas/canvas.test3.js b/modules/documentCanvas/canvas/canvas.test3.js
index 0d8e87a..3c53f09 100644
--- a/modules/documentCanvas/canvas/canvas.test3.js
+++ b/modules/documentCanvas/canvas/canvas.test3.js
@@ -1,8 +1,10 @@
 define([
 'libs/chai',
+'libs/sinon',
 'modules/documentCanvas/canvas/canvas',
-'modules/documentCanvas/canvas/documentElement'
-], function(chai, canvas, documentElement) {
+'modules/documentCanvas/canvas/documentElement',
+'modules/documentCanvas/canvas/utils'
+], function(chai, sinon, canvas, documentElement, utils) {
     
 'use strict';
 
@@ -11,30 +13,6 @@ 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">'
-                            + 'This is some text without its own wrapping tag.'
-                            + '<div wlxml-tag="div" wlxml-class="p-subclass">This is a paragraph.</div>'
-                            + '<div wlxml-tag="div">This is text in a div <div wlxml-tag="span">with some inline text</div>.</div>'
-                            + 'This is some text without its own wrapping tag.'
-                            + '</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) {
@@ -42,20 +20,24 @@ describe('Canvas', function() {
                 expect(dom.prop('tagName')).to.equal('DIV', tagName + ' is represented as div');
             });
         });
-        it('has wlxml tag put into wlxml-tag attribute', function() {
+        it('has wlxml tag put into wlxml-tag attribute of its internal container', function() {
             var dom = canvas.fromXML('<section></section>').doc().dom();
-            expect(dom.attr('wlxml-tag')).to.equal('section');
+            expect(dom.children('[document-element-content]').attr('wlxml-tag')).to.equal('section');
         });
-        it('has wlxml class put into wlxml-class, dots replaced with dashes', function() {
+        it('has wlxml class put into wlxml-class attribute of its internal containr, 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');
+            expect(dom.children('[document-element-content]').attr('wlxml-class')).to.equal('some-class');
         });
     });
 
     describe('Internal HTML representation of a DocumentTextElement', function() {
-        it('is just a TextNode', function() {
+        it('is text node wrapped in a div with document-text-element attribute set', function() {
             var dom = canvas.fromXML('<section>Alice</section>').doc().children()[0].dom();
-            expect(dom[0].nodeType === Node.TEXT_NODE);
+            expect(dom.prop('tagName')).to.equal('DIV');
+            expect(dom.attr('document-text-element')).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');
         });
     });
 
@@ -67,7 +49,14 @@ 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() {
@@ -98,14 +87,64 @@ describe('Canvas', function() {
             });
 
             it('knows WLXML class of a WLXML tag it renders', function(){
-                var c = canvas.fromXML('<section class="some.class"></section>'),
+                var c = canvas.fromXML('<section class="some.class.A"></section>'),
                     section = c.doc();
-                expect(section.getWlxmlClass()).to.equal('some.class');
-                section.setWlxmlClass('some.other.class');
-                expect(section.getWlxmlClass()).to.equal('some.other.class');
+                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]));
         });
     });
 
@@ -226,6 +265,32 @@ describe('Canvas', function() {
                     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() {
@@ -237,7 +302,7 @@ describe('Canvas', function() {
                         children = c.doc().children();
 
                     expect(children.length).to.equal(1);
-                    expect(children[0].sameNode(appended));
+                    expect(children[0].sameNode(appended)).to.be.true;
                 });
 
                 it('can put new TextElement at the end', function() {
@@ -246,7 +311,7 @@ describe('Canvas', function() {
                         children = c.doc().children();
 
                     expect(children.length).to.equal(1);
-                    expect(children[0].sameNode(appended));
+                    expect(children[0].sameNode(appended)).to.be.true;
                     expect(children[0].getText()).to.equal('Alice');
                 });
 
@@ -256,7 +321,7 @@ describe('Canvas', function() {
                         added = div.after({tag: 'header', klass: 'some.class'}),
                         children = c.doc().children();
                     expect(children.length).to.equal(2);
-                    expect(children[1].sameNode(added));
+                    expect(children[1].sameNode(added)).to.be.true;
                 });
 
                 it('can put new Nodeelement before another element', function() {
@@ -265,7 +330,7 @@ describe('Canvas', function() {
                         added = div.before({tag: 'header', klass: 'some.class'}),
                         children = c.doc().children();
                     expect(children.length).to.equal(2);
-                    expect(children[0].sameNode(added));
+                    expect(children[0].sameNode(added)).to.be.true;
                 });
 
                 it('can put new DocumentNodeElement after DocumentTextElement', function() {
@@ -292,6 +357,53 @@ describe('Canvas', function() {
                     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');
+                });
+
+                it('treats dividing DocumentTextElement at the very end as appending after it', 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: 15}),
+                        sectionChildren = section.children(),
+                        textElement = sectionChildren[0],
+                        nodeElement = sectionChildren[1];
+
+                    expect(sectionChildren.length).to.equal(2);
+                    expect(textElement.getText()).to.equal('Alice has a cat');
+                    expect(returned.sameNode(nodeElement)).to.be.true;
+                    expect(nodeElement.getWlxmlTag()).to.equal('aside');
+                });
+
+                it('treats dividing DocumentTextElement at the very beginning as appending before it', 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: 0}),
+                        sectionChildren = section.children(),
+                        nodeElement = sectionChildren[0],
+                        textElement = sectionChildren[1];
+                        
+                    expect(sectionChildren.length).to.equal(2);
+                    expect(textElement.getText()).to.equal('Alice has a cat');
+                    expect(returned.sameNode(nodeElement)).to.be.true;
+                    expect(nodeElement.getWlxmlTag()).to.equal('aside');
+                });
             });
 
             describe('Splitting text', function() {
@@ -301,18 +413,49 @@ describe('Canvas', function() {
                         section = c.doc(),
                         text = section.children()[0].children()[0];
 
-                    text.split({offset: 5});
+                    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.wlxmlTag).to.equal('header', 'first section child represents wlxml header');
+                    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.wlxmlTag).to.equal('header', 'second section child represents wlxml header');
+                    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() {
@@ -330,19 +473,19 @@ describe('Canvas', function() {
                     
                     var sectionChildren = section.children();
                     expect(sectionChildren.length).to.equal(2, 'Section has two children');
-                    expect(sectionChildren[0].wlxmlTag).to.equal('header', 'First section element is a wlxml header');
-                    expect(sectionChildren[1].wlxmlTag).to.equal('header', 'Second section element is a wlxml header');
+                    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].wlxmlTag).to.equal('span', 'First header has span in the middle');
+                    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].wlxmlTag).to.equal('span', 'Second header has span in the middle');
+                    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');
                 });
             });
@@ -445,14 +588,15 @@ describe('Canvas', function() {
 
             describe('unwrapping', function() {
                 it('unwraps DocumentTextElement from its parent DocumentNodeElement if it\'s its only child', function() {
-                    var c = canvas.fromXML('<section><div>Alice has a cat</div></section>'),
+                    var c = canvas.fromXML('<section>Alice <span>has a</span> cat</section>'),
                     section = c.doc(),
-                    text = section.children()[0].children()[0];
+                    text = section.children()[1].children()[0];
 
-                    text.unwrap();
+                    var newTextContainer = text.unwrap();
 
-                    expect(section.children().length).to.equal(1);
+                    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');
                 })
             });
         });
@@ -848,6 +992,318 @@ describe('Canvas', function() {
         });
 
     });
+
+    describe('Cursor', function() {
+
+        var getSelection;
+
+        var findTextNode = function(inside, text) {
+            var nodes = inside.find(':not(iframe)').addBack().contents().filter(function() {
+                return this.nodeType === Node.TEXT_NODE && this.data === text;
+            });
+            if(nodes.length)
+                return nodes[0];
+            return null;
+        }
+
+        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 = findTextNode(dom, 'Alice has a cat');
+
+            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: findTextNode(dom, 'Alice '),
+                    has: findTextNode(dom, 'has'),
+                    cat: findTextNode(dom, ' cat')
+                },
+                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: findTextNode(dom, 'Alice '),
+                    has: findTextNode(dom, 'has'),
+                    a: findTextNode(dom, ' a '),
+                    big: findTextNode(dom, 'big'),
+                    cat: findTextNode(dom, ' cat'),
+                },
+                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('zero width space handling', function() {
+            it('position range includes ZWS at the boundries of text in case when native selection api doesn\'t', function() {
+                var c = canvas.fromXML("<section>Alice</section>"),
+                    dom = c.doc().dom(),
+                    textNode = findTextNode(dom, 'Alice'),
+                    cursor = c.getCursor();
+
+                textNode.data = utils.unicode.ZWS + 'Alice';
+                getSelection.returns({anchorNode: textNode, anchorOffset: 1, focusNode: textNode, focusOffset: 1});
+                expect(cursor.getPosition().offset).to.equal(0);
+                expect(cursor.getPosition().offsetAtBeginning).to.equal(true, 'offset at beginning');
+                
+                textNode.data = 'Alice' + utils.unicode.ZWS;
+                getSelection.returns({anchorNode: textNode, anchorOffset: 5, focusNode: textNode, focusOffset: 5});
+                expect(cursor.getPosition().offset).to.equal(6);
+                expect(cursor.getPosition().offsetAtEnd).to.equal(true, 'offset at end');
+            });
+        });
+    });
+
+    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();
+
+            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);
+            });
+
+        })
+    })
 });