mirror of
https://github.com/dart-lang/sdk
synced 2024-09-19 23:31:42 +00:00
192579020c
Bug: Change-Id: I194436597ba39b2e2b872fb58b77314ab925b3aa Reviewed-on: https://dart-review.googlesource.com/7080 Commit-Queue: Ben Konyi <bkonyi@google.com> Reviewed-by: Bob Nystrom <rnystrom@google.com>
44 lines
1,020 B
Dart
44 lines
1,020 B
Dart
// Copyright (c) 2012, 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 "package:expect/expect.dart";
|
|
|
|
class A {}
|
|
|
|
class B extends A {}
|
|
|
|
class C extends B {}
|
|
|
|
class D implements C {}
|
|
|
|
int inscrutable(int x) => (x == 0) ? 0 : (x | inscrutable(x & (x - 1)));
|
|
|
|
main() {
|
|
var things = [new A(), new B(), new C(), new D()];
|
|
|
|
var a = things[inscrutable(0)];
|
|
Expect.isTrue(a is A);
|
|
Expect.isFalse(a is B);
|
|
Expect.isFalse(a is C);
|
|
Expect.isFalse(a is D);
|
|
|
|
var b = things[inscrutable(1)];
|
|
Expect.isTrue(b is A);
|
|
Expect.isTrue(b is B);
|
|
Expect.isFalse(b is C);
|
|
Expect.isFalse(b is D);
|
|
|
|
var c = things[inscrutable(2)];
|
|
Expect.isTrue(c is A);
|
|
Expect.isTrue(c is B);
|
|
Expect.isTrue(c is C);
|
|
Expect.isFalse(c is D);
|
|
|
|
var d = things[inscrutable(3)];
|
|
Expect.isTrue(d is A);
|
|
Expect.isTrue(d is B);
|
|
Expect.isTrue(d is C);
|
|
Expect.isTrue(d is D);
|
|
}
|