Fix issue http://dartbug.com/8350 by dealing with interceptors in invokeOn.

tests/language/invocation_mirror_invoke_on2_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.
+
+class Proxy {
+  final proxied;
+  Proxy(this.proxied);
+  noSuchMethod(mirror) => mirror.invokeOn(proxied);
+}
+
+main() {
+  testList();
+  testString();
+  testInt();
+  testDouble();

[ngeoffray, 2013/02/06 12:40:39]

If you want to be exhaustive, you can also check null, bool and static functions
(that become JS functions).

[kasperl, 2013/02/06 12:46:14]

Yeah, but none of those objects have any methods I can call through the proxy
which makes them a little bit less interesting to test.

[ngeoffray, 2013/02/06 12:50:31]

Good point :)

+}
+
+testList() {
+  var list = [];
+  var proxy = new Proxy(list);
+
+  Expect.isTrue(proxy.isEmpty);
+  Expect.isTrue(list.isEmpty);
+
+  proxy.add(42);
+
+  Expect.isFalse(proxy.isEmpty);
+  Expect.equals(1, proxy.length);
+  Expect.equals(42, proxy[0]);
+
+  Expect.isFalse(list.isEmpty);
+  Expect.equals(1, list.length);
+  Expect.equals(42, list[0]);
+
+  proxy.add(87);
+
+  Expect.equals(2, proxy.length);
+  Expect.equals(87, proxy[1]);
+
+  Expect.equals(2, list.length);
+  Expect.equals(87, list[1]);
+
+  Expect.throws(() => proxy.funky(), (e) => e is NoSuchMethodError);
+  Expect.throws(() => list.funky(), (e) => e is NoSuchMethodError);
+}
+
+testString() {
+  var string = "funky";
+  var proxy = new Proxy(string);
+
+  Expect.equals(string.charCodeAt(0), proxy.charCodeAt(0));
+  Expect.equals(string.length, proxy.length);
+
+  Expect.throws(() => proxy.funky(), (e) => e is NoSuchMethodError);
+  Expect.throws(() => string.funky(), (e) => e is NoSuchMethodError);
+}
+
+testInt() {
+  var number = 42;
+  var proxy = new Proxy(number);
+
+  Expect.equals(number + 87, proxy + 87);
+  Expect.equals(number.toDouble(), proxy.toDouble());
+
+  Expect.throws(() => proxy.funky(), (e) => e is NoSuchMethodError);
+  Expect.throws(() => number.funky(), (e) => e is NoSuchMethodError);
+}
+
+testDouble() {
+  var number = 42.99;
+  var proxy = new Proxy(number);
+
+  Expect.equals(number + 87, proxy + 87);
+  Expect.equals(number.toInt(), proxy.toInt());
+
+  Expect.throws(() => proxy.funky(), (e) => e is NoSuchMethodError);
+  Expect.throws(() => number.funky(), (e) => e is NoSuchMethodError);
+}