Revert "Enhance dart:js interop in a backwards compatible manner."

tests/html/js_typed_interop_test.dart

-// Copyright (c) 2015, 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 jsArrayTest;
-
-import 'dart:html';
-import 'dart:js';
-
-import 'package:unittest/unittest.dart';
-import 'package:unittest/html_config.dart';
-
-_injectJs() {
-  document.body.append(new ScriptElement()
-    ..type = 'text/javascript'
-    ..innerHtml = r"""
-  var foo = {
-    x: 3,
-    z: 40, // Not specified in typed Dart API so should fail in checked mode.
-    multiplyByX: function(arg) { return arg * this.x; },
-    // This function can be torn off without having to bind this.
-    multiplyBy2: function(arg) { return arg * 2; }
-  };
-
-  var foob = {
-    x: 8,
-    y: "why",
-    multiplyByX: function(arg) { return arg * this.x; }
-  };
-
-  var bar = {
-    x: "foo",
-    multiplyByX: true
-  };
-
-  var selection = ["a", "b", "c", foo, bar];  
-  selection.doubleLength = function() { return this.length * 2; };
-""");
-}
-
-abstract class Foo {
-  int get x;
-  set x(int v);
-  num multiplyByX(num y);
-  num multiplyBy2(num y);
-}
-
-abstract class Foob extends Foo {
-  final String y;
-}
-
-abstract class Bar {
-  String get x;
-  bool get multiplyByX;
-}
-
-class Baz {}
-
-// This class shows the pattern used by APIs such as jQuery that add methods
-// to Arrays.
-abstract class Selection implements List {
-  num doubleLength();
-}
-
-Foo get foo => context['foo'];
-Foob get foob => context['foob'];
-Bar get bar => context['bar'];
-Selection get selection => context['selection'];
-
-main() {
-  // Call experimental API to register Dart interfaces implemented by
-  // JavaScript classes.
-  registerJsInterfaces([Foo, Foob, Bar, Selection]);
-
-  _injectJs();
-
-  useHtmlConfiguration();
-
-  group('property', () {
-    test('get', () {
-      expect(foo.x, equals(3));
-      expect(foob.x, equals(8));
-      expect(foob.y, equals("why"));
-
-      // Exists in JS but not in API.
-      expect(() => foo.z, throws);
-      expect(bar.multiplyByX, isTrue);
-    });
-    test('set', () {
-      foo.x = 42;
-      expect(foo.x, equals(42));
-      // Property tagged as read only in typed API.
-      expect(() => foob.y = "bla", throws);
-      expect(() => foo.unknownName = 42, throws);
-    });
-  });
-
-  group('method', () {
-    test('call', () {
-      foo.x = 100;
-      expect(foo.multiplyByX(4), equals(400));
-      foob.x = 10;
-      expect(foob.multiplyByX(4), equals(40));
-    });
-
-    test('tearoff', () {
-      foo.x = 10;
-      // TODO(jacobr): should we automatically bind "this" for tearoffs of JS
-      // objects?
-      JsFunction multiplyBy2 = foo.multiplyBy2;
-      expect(multiplyBy2(5), equals(10));
-    });
-  });
-
-  group('type check', () {
-    test('js interfaces', () {
-      expect(foo is JsObject, isTrue);
-      // Cross-casts are allowed.
-      expect(foo is Bar, isTrue);
-      expect(selection is JsArray, isTrue);
-
-      // We do know at runtime whether something is a JsArray or not.
-      expect(foo is JsArray, isFalse);
-    });
-
-    test('dart interfaces', () {
-      expect(foo is Function, isFalse);
-      expect(selection is List, isTrue);
-    });
-  });
-
-  group("registration", () {
-    test('repeated fails', () {
-      // The experimental registerJsInterfaces API has already been called so
-      // it cannot be called a second time.
-      expect(() => registerJsInterfaces([Baz]), throws);
-    });
-  });
-}