blob: e4e1ab8ec2e1f889b34847f3efd1e81944ead38a [file] [log] [blame]
// 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.
import "native_testing.dart";
// Test for dartExperimentalFixupGetTag.
class Foo {
// There is one native class with dispatch tag 'A'.
token() native;
void setup() {
JS('', r"""
dartExperimentalFixupGetTag = function (originalGetTag) {
function fixedGetTag(obj) {
// Local JS 'class' B is made to be another implementation of the native
// class with tag 'A'.
if (obj instanceof B) return 'A';
// Other classes behave as before.
return originalGetTag(obj);
return fixedGetTag;
function A(){ }
A.prototype.token = function () { return 'isA'; };
function B(){ }
B.prototype.token = function () { return 'isB'; };
makeA = function() { return new A(); };
makeB = function() { return new B(); };
makeA() native;
makeB() native;
main() {
var a = makeA();
var b = makeB();
Expect.equals('isA', a.token());
// This call succeeds because the fixed-up 'getTag' method returns Foo's
// dispatch tag, and B is a faithful polyfil for Foo/A.
Expect.equals('isB', b.token());
Expect.isTrue(a is Foo);
Expect.isTrue(b is Foo);