Nicholas Shahan
c2a879e41d
The existing usage will no longer work as expected once the security measures to prevent native Object prototype pollution are enabled. The recommended replacements are `Object.getPrototypeOf()` and `Object.setPrototypeOf()`. Change-Id: I0617233bd31ccd2afc9f94c527eecb31c5f1b340 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/330047 Reviewed-by: Srujan Gaddam <srujzs@google.com> Commit-Queue: Nicholas Shahan <nshahan@google.com>
88 lines
1.9 KiB
Dart
88 lines
1.9 KiB
Dart
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// Test for downcasts on native classes.
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import "native_testing.dart";
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abstract class J {}
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abstract class I extends J {
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I read();
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write(covariant I x);
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}
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// Native implementation.
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@Native("A")
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class A implements I {
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// The native class accepts only other native instances.
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A read() native;
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write(A x) native;
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}
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@Native("B")
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class B extends A {}
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makeA() native;
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makeB() native;
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void setup() {
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JS('', r"""
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(function(){
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function inherits(child, parent) {
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if (Object.getPrototypeOf(child.prototype)) {
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Object.setPrototypeOf(child.prototype, parent.prototype);
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} else {
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function tmp() {};
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tmp.prototype = parent.prototype;
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child.prototype = new tmp();
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child.prototype.constructor = child;
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}
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}
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function A(){}
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function B(){}
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inherits(B, A);
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A.prototype.read = function() { return this._x; };
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A.prototype.write = function(x) { this._x = x; };
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self.makeA = function(){return new A()};
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self.makeB = function(){return new B()};
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self.nativeConstructor(A);
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self.nativeConstructor(B);
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})()""");
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applyTestExtensions(['A', 'B']);
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}
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class C {}
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bool _check(a, b) => identical(a, b);
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main() {
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nativeTesting();
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setup();
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var a1 = makeA();
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var b1 = makeB();
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var ob = new Object();
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Expect.throws(() => ob as J);
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Expect.throws(() => ob as I);
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Expect.throws(() => ob as A);
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Expect.throws(() => ob as B);
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Expect.throws(() => ob as C);
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// Use b1 first to prevent a1 is checks patching the A prototype.
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Expect.equals(b1, b1 as J);
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Expect.equals(b1, b1 as I);
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Expect.equals(b1, b1 as A);
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Expect.equals(b1, b1 as B);
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Expect.equals(a1, a1 as J);
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Expect.equals(a1, a1 as I);
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Expect.equals(a1, a1 as A);
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Expect.throws(() => a1 as B);
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Expect.throws(() => a1 as C);
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}
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