Port custom element layout tests to Dart

tests/html/custom/document_register_basic_test.dart

Index: tests/html/custom/document_register_basic_test.dart
diff --git a/tests/html/custom/document_register_basic_test.dart b/tests/html/custom/document_register_basic_test.dart
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+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+library document_register_basic_test;
+import 'package:unittest/unittest.dart';
+import 'package:unittest/html_config.dart';
+import 'dart:html';
+
+class Foo extends HtmlElement {
+  static final tag = 'x-foo';
+  factory Foo() => new Element.tag(tag);
+
+  get thisIsACustomClass => true;
+}
+
+class Bar extends HtmlElement {
+  static final tag = 'x-bar';
+  factory Bar() => new Element.tag(tag);
+
+  get thisIsACustomClass => true;
+}
+
+class Baz extends Foo {
+  static final tag = 'x-baz';
+  factory Baz() => new Element.tag(tag);
+
+  get thisIsAlsoACustomClass => true;
+}
+
+class BadB {
+}
+
+class BadE implements HtmlElement {
+  static final tag = 'x-tag-e';
+  factory BadE() => new Element.tag(tag);
+}
+
+main() {
+  useHtmlConfiguration();
+
+  // Adapted from Blink's fast/dom/custom/document-register-basic test.
+
+  test('Testing document.register() basic behaviors', () {
+    document.register(Foo.tag, Foo);
+
+    // Cannot register an existing dart:html type.
+    expect(() => document.register('x-bad-a', HtmlElement), throws);
+
+    // Invalid user type.  Doesn't inherit from HtmlElement.
+    expect(() => document.register('x-bad-b', BadB), throws);
+
+    // Not a type.
+    expect(() => document.register('x-bad-c', null), throws);
+
+    // Cannot register system type.
+    expect(() => document.register('x-bad-d', Object), throws);
+
+    // Must extend HtmlElement, not just implement it.
+    expect(() => document.register(BadE.tag, BadE), throws);
+
+    // Constructor initiated instantiation
+    var createdFoo = new Foo();
+    expect(createdFoo.thisIsACustomClass, isTrue);
+
+    // Dart type correctness
+    expect(createdFoo is HtmlElement, isTrue);
+    expect(createdFoo is Foo, isTrue);
+    expect(createdFoo.runtimeType, Foo);
+
+    // Native getter
+    expect(createdFoo.tagName, "X-FOO");
+
+    // Native setter
+    createdFoo.innerHtml = "Hello";
+    expect(createdFoo.text, "Hello");
+
+    // Native method
+    var childDiv = new DivElement();
+    createdFoo.append(childDiv);
+    expect(createdFoo.lastChild, childDiv);
+
+    // Parser initiated instantiation
+    var container = new DivElement()..id = "container";
+    document.body.append(container);
+    container.innerHtml = "<x-foo></x-foo>";
+    var parsedFoo = container.firstChild;
+
+    expect(parsedFoo is Foo, isTrue);
+    expect(parsedFoo.tagName, "X-FOO");
+
+    // Ensuring the wrapper is retained
+    var someProperty = new Expando();
+    someProperty[parsedFoo] = "hello";
+    // TODO(vsm): Fix this in Dartium.
+    // expect(someProperty[container.firstChild], someProperty[parsedFoo]);
+    // expect(container.firstChild, parsedFoo);
+
+    // Having another constructor
+    document.register(Bar.tag, Bar);
+    var createdBar = new Bar();
+    expect(createdBar is Bar, isTrue);
+    expect(createdBar is Foo, isFalse);
+    expect(createdBar.tagName, "X-BAR");
+
+    // Having a subclass
+    document.register(Baz.tag, Baz);
+    var createdBaz = new Baz();
+    expect(createdBaz.tagName, "X-BAZ");
+    expect(createdBaz.thisIsACustomClass, isTrue);
+    expect(createdBaz.thisIsAlsoACustomClass, isTrue);
+
+    // With irregular cases
+    var createdUpperBar = new Element.tag("X-BAR");
+    var createdMixedBar = new Element.tag("X-Bar");
+    expect(createdUpperBar is Bar, isTrue);
+    expect(createdUpperBar.tagName, "X-BAR");
+    expect(createdMixedBar is Bar, isTrue);
+    expect(createdMixedBar.tagName, "X-BAR");
+
+    container.innerHtml = "<X-BAR></X-BAR><X-Bar></X-Bar>";
+    expect(container.firstChild is Bar, isTrue);
+    expect(container.firstChild.tagName, "X-BAR");
+    expect(container.lastChild is Bar, isTrue);
+    expect(container.lastChild.tagName, "X-BAR");
+
+    // Constructors shouldn't interfere with each other
+    expect((new Foo()).tagName, "X-FOO");
+    expect((new Bar()).tagName, "X-BAR");
+    expect((new Baz()).tagName, "X-BAZ");
+  });
+}