added preliminary ShadowDOM tests

tests/html/shadow_dom_test.dart

+#library('ShadowDOMTest');

[Siggi Cherem (dart-lang), 2012/06/25 22:16:00]

+ copyright notice at the top

[samhop, 2012/06/26 00:19:15]

Done.

+#import('../../lib/unittest/unittest.dart');
+#import('../../lib/unittest/html_config.dart');
+#import('dart:html');
+
+main() {
+  useHtmlConfiguration();
+  
+  test('Should be able to make a new ShadowRoot.',
+        () {

[Siggi Cherem (dart-lang), 2012/06/25 22:16:00]

style nit: move the '() {' to the previous line. Then only indent the body below
+2

[samhop, 2012/06/26 00:19:15]

Done.

+          var div1 = new DivElement();
+          var sr = new ShadowRoot(div1);
+          document.body.nodes.add(div1);
+          expect(sr, isNotNull);

[Jacob, 2012/06/25 21:53:11]

why would this be null?

[samhop, 2012/06/26 00:19:15]

At one point I thought that was the failure behavior of the ShadowRoot
constructor if --enable-shadow-dom is not set, but I was wrong. Fixed.

+  });
+
+  group('ShadowDOM tests', () {
+
+    var div1, div2, sr; 
+
+    setUp(() {
+      div1 = new DivElement();
+      div2 = new DivElement();
+      div1.classes.add('foo');
+      sr = new ShadowRoot(div2);
+      sr.nodes.add(new Element.html('<p class="foo"></p>'));

[Jacob, 2012/06/25 21:53:11]

be consistent about creating elements using
Element.html 
or new SomeElement()

[samhop, 2012/06/26 00:19:15]

Done.

+      sr.nodes.add(new Element.tag('content'));
+      div2.nodes.add(new Element.html('<p class="foo"></p>'));
+      document.body.nodes.add(div1);
+      document.body.nodes.add(div2);
+    });
+
+    test('''
+         nodes in a shadow DOM subtree are not accessible using selectors from 

[Jacob, 2012/06/25 21:53:11]

use a shorter test case name.

[samhop, 2012/06/26 00:19:15]

Done.

+         outside that shadow DOM subtree
+         ''',
+         () {
+           expect(queryAll('.foo').length, 2);

[Siggi Cherem (dart-lang), 2012/06/25 22:16:00]

it might be good to validate which elements are there.

[samhop, 2012/06/26 00:19:15]

Done.

+    });
+
+    test('Parent node of a shadow root must be null.',
+         () {

[Siggi Cherem (dart-lang), 2012/06/25 22:16:00]

nit: join with prev line

[samhop, 2012/06/26 00:19:15]

Done.

+           sr = new ShadowRoot(div2);
+           expect(sr, isNotNull);

[Jacob, 2012/06/25 21:53:11]

how is this testing that the parent node of a shadow root must be null?

[samhop, 2012/06/26 00:19:15]

How embarrassing :p. Fixed.

On 2012/06/25 21:53:11, Jacob wrote:

+    });
+
+    
+    // TODO(samhop): test that <content> and <content select="foo"> and
+    // <shadow>
+    // work properly. This is blocked on having a good way to do browser
+    // rendering tests.
+
+    test('''
+         Querying on a selector from within a shadowed fragment does not return
+         elements outside the shadowed fragment (lower boundary is
+         encapsulated) and shadowed nodes are accessible by querying from
+         within the shadowed fragment.

[Siggi Cherem (dart-lang), 2012/06/25 22:16:00]

same comment from jacob here. Ideally a 1-line. If it needs more explanation,
it's ok to put it in a comment below. 

[samhop, 2012/06/26 00:19:15]

Done.

+         ''',
+         () {
+           expect(sr.queryAll('.foo').length, 1);

[Siggi Cherem (dart-lang), 2012/06/25 22:16:00]

similarly to the other test: it would be good to check that this is the actual
element you expect (holding a ref to the <p> in div1 or something similar)

[samhop, 2012/06/26 00:19:15]

Done.

+    }); 
+  });
+}