blob: 44b689235d4c7223afc2afcde540422ead195cc4 [file] [log] [blame]
// Copyright (c) 2011, 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.
// Test for downcasts on native classes.
import "native_testing.dart";
abstract class J {}
abstract class I extends J {
I read();
write(I x);
// Native implementation.
class A implements I {
// The native class accepts only other native instances.
A read() native;
write(A x) native;
class B extends A {}
makeA() native;
makeB() native;
void setup() native """
// This code is all inside 'setup' and so not accessible from the global scope.
function inherits(child, parent) {
if (child.prototype.__proto__) {
child.prototype.__proto__ = parent.prototype;
} else {
function tmp() {};
tmp.prototype = parent.prototype;
child.prototype = new tmp();
child.prototype.constructor = child;
function A(){}
function B(){}
inherits(B, A); = function() { return this._x; };
A.prototype.write = function(x) { this._x = x; };
makeA = function(){return new A};
makeB = function(){return new B};
class C {}
bool _check(a, b) => identical(a, b);
main() {
var a1 = makeA();
var b1 = makeB();
var ob = new Object();
Expect.throws(() => ob as J);
Expect.throws(() => ob as I);
Expect.throws(() => ob as A);
Expect.throws(() => ob as B);
Expect.throws(() => ob as C);
// Use b1 first to prevent a1 is checks patching the A prototype.
Expect.equals(b1, b1 as J);
Expect.equals(b1, b1 as I);
Expect.equals(b1, b1 as A);
Expect.equals(b1, b1 as B);
Expect.equals(a1, a1 as J);
Expect.equals(a1, a1 as I);
Expect.equals(a1, a1 as A);
Expect.throws(() => a1 as B);
Expect.throws(() => a1 as C);