Adding Element.created constructor

tests/html/custom/created_callback_test.dart

 // 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 created_callback_test;
 import 'package:unittest/unittest.dart';
 import 'package:unittest/html_config.dart';
 import 'dart:html';
 import '../utils.dart';
 
 class A extends HtmlElement {
   static final tag = 'x-a';
   factory A() => new Element.tag(tag);
+  A.created(): super.created();
 
   static int createdInvocations = 0;
 
-  void created() {
+  void createdCallback() {
     createdInvocations++;
   }
 }
 
 class B extends HtmlElement {
   static final tag = 'x-b';
   factory B() => new Element.tag(tag);
+  B.created(): super.created();
 }
 
 class C extends HtmlElement {
   static final tag = 'x-c';
   factory C() => new Element.tag(tag);
+  C.created(): super.created();
 
   static int createdInvocations = 0;
   static var div;
 
-  void created() {
+  void createdCallback() {
     createdInvocations++;
 
     if (this.id != 'u') {
       return;
     }
 
     var t = div.query('#t');
     var v = div.query('#v');
     var w = div.query('#w');
 
     expect(query('x-b:not(:unresolved)'), this);
     expect(queryAll(':unresolved'), [v, w]);
 
     // As per:
     // http://www.w3.org/TR/2013/WD-custom-elements-20130514/#serializing-and-parsing
     // creation order is t, u, v, w (postorder).
     expect(t is C, isTrue);
     // Note, this is different from JavaScript where this would be false.
     expect(v is C, isTrue);
   }
 }
 
 main() {
   useHtmlConfiguration();
 
   // Adapted from Blink's
   // fast/dom/custom/created-callback test.
 
-  setUp(loadPolyfills);
+  var registered = false;
+  setUp(() {
+    return loadPolyfills().then((_) {
+      if (!registered) {
+        registered = true;
+        document.register(B.tag, B);
+        document.register(C.tag, C);
+        ErrorConstructorElement.register();
+      }
+    });
+  });
 
   test('transfer created callback', () {
     document.register(A.tag, A);
     var x = new A();
     expect(A.createdInvocations, 1);
   });
 
-  test(':unresolved and created callback timing', () {
-    document.register(B.tag, B);
-    document.register(C.tag, C);
-
+  test('unresolved and created callback timing', () {
     var div = new DivElement();
     C.div = div;
     div.setInnerHtml("""
 <x-c id="t"></x-c>
 <x-b id="u"></x-b>
 <x-c id="v"></x-c>
 <x-b id="w"></x-b>
 """, treeSanitizer: new NullTreeSanitizer());
 
     Platform.upgradeCustomElements(div);
 
     expect(C.createdInvocations, 2);
     expect(div.query('#w') is B, isTrue);
   });
 
+  test('nesting of constructors', NestedElement.test);
+
+  test('access while upgrading gets unupgraded element',
+      AccessWhileUpgradingElement.test);
+
+  test('cannot call created constructor', () {
+    expect(() {
+      new B.created();
+    }, throws);
+  });
+
+  test('cannot register without created', () {
+    expect(() {
+      document.register(MissingCreatedElement.tag, MissingCreatedElement);
+    }, throws);
+  });
+
+  test('throw on createElement does not upgrade', () {
+    ErrorConstructorElement.callCount = 0;
+
+    var e = new Element.tag(ErrorConstructorElement.tag);
+    expect(ErrorConstructorElement.callCount, 1);
+    expect(e is HtmlElement, isTrue);
+    expect(e is ErrorConstructorElement, isFalse);
+
+    var dummy = new DivElement();
+    dummy.append(e);
+    e = dummy.firstChild;
+    expect(ErrorConstructorElement.callCount, 1);
+  });
+
+  test('throw on innerHtml does not upgrade', () {
+    ErrorConstructorElement.callCount = 0;
+
+    var dummy = new DivElement();
+    var tag = ErrorConstructorElement.tag;
+    dummy.setInnerHtml('<$tag></$tag>',
+        treeSanitizer: new NullTreeSanitizer());
+
+    expect(ErrorConstructorElement.callCount, 1);
+
+    var e = dummy.firstChild;
+    // Accessing should not re-run the constructor.
+    expect(ErrorConstructorElement.callCount, 1);
+    expect(e is HtmlElement, isTrue);
+    expect(e is ErrorConstructorElement, isFalse);
+  });
+
+
   // TODO(vsm): Port additional test from upstream here:
   // http://src.chromium.org/viewvc/blink/trunk/LayoutTests/fast/dom/custom/created-callback.html?r1=156141&r2=156185
 }
+
+
+class NestedElement extends HtmlElement {
+  static final tag = 'x-nested';
+
+  final Element b = new B();
+
+  factory NestedElement() => new Element.tag(tag);
+  NestedElement.created(): super.created();
+
+  static void register() {
+    document.register(tag, NestedElement);
+  }
+
+  static void test() {
+    register();
+
+    var e = new NestedElement();
+    expect(e.b, isNotNull);
+    expect(e.b is B, isTrue);
+    expect(e is NestedElement, isTrue);
+  }
+}
+
+
+class AccessWhileUpgradingElement extends HtmlElement {
+  static final tag = 'x-access-while-upgrading';
+
+  static Element upgradingContext;
+  static Element upgradingContextChild;
+
+  final foo = runInitializerCode();
+
+  factory AccessWhileUpgradingElement() => new Element.tag(tag);
+  AccessWhileUpgradingElement.created(): super.created();
+
+  static runInitializerCode() {
+    upgradingContextChild = upgradingContext.firstChild;
+
+    return 666;
+  }
+
+  static void register() {
+    document.register(tag, AccessWhileUpgradingElement);
+  }
+
+  static void test() {
+    register();
+
+    upgradingContext = new DivElement();
+    upgradingContext.setInnerHtml('<$tag></$tag>',
+        treeSanitizer: new NullTreeSanitizer());
+    var child = upgradingContext.firstChild;
+
+    expect(child.foo, 666);
+    expect(upgradingContextChild is HTMLElement, isTrue);
+    expect(upgradingContextChild is AccessWhileUpgradingElement, isFalse,
+        reason: 'Elements accessed while upgrading should not be upgraded.');
+  }
+}
+
+class MissingCreatedElement extends HtmlElement {
+  static final tag = 'x-missing-created';
+
+  factory MissingCreatedElement() => new Element.tag(tag);
+}
+
+class ErrorConstructorElement extends HtmlElement {
+  static final tag = 'x-throws-in-constructor';
+  static int callCount = 0;
+
+  factory ErrorConstructorElement() => new Element.tag(tag);
+
+  ErrorConstructorElement.created(): super.created() {
+    print('here!!');
+    ++callCount;
+    throw new Exception('Just messin with ya');
+  }
+
+  static void register() {
+    document.register(tag, ErrorConstructorElement);
+  }
+}