Sigmund Cherem
912005267d
Change-Id: I46be49b2effec3e38a3dc44cd45cfe736f77fa78 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/182680 Commit-Queue: Sigmund Cherem <sigmund@google.com> Reviewed-by: Joshua Litt <joshualitt@google.com> Reviewed-by: Nicholas Shahan <nshahan@google.com> Reviewed-by: Stephen Adams <sra@google.com>
60 lines
1.3 KiB
Dart
60 lines
1.3 KiB
Dart
// Copyright (c) 2013, 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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import "native_testing.dart";
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// Native classes can have subclasses that are not declared to the program. The
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// subclasses are indistinguishable from the base class. This means that
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// abstract native classes can appear to have instances.
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@Native("A")
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abstract class A {}
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@Native("B")
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abstract class B {
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foo() native;
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}
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class C {}
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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 A(){}
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function B(){}
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B.prototype.foo = function() { return 'B.foo'; };
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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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main() {
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nativeTesting();
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setup();
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var a = makeA();
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var b = makeB();
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var c = confuse(new C());
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Expect.isTrue(a is A);
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Expect.isFalse(b is A);
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Expect.isFalse(c is A);
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Expect.isFalse(a is B);
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Expect.isTrue(b is B);
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Expect.isFalse(c is B);
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Expect.isFalse(a is C);
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Expect.isFalse(b is C);
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Expect.isTrue(c is C);
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Expect.equals('B.foo', b.foo());
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}
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