dart-sdk/tests/language_strong/is_interfaces_test.dart
Bob Nystrom 6c757957db Move the dev_compiler strong mode tests into sdk/tests/.
DDC's codegen test copies those files to a local "gen" directory so
that it can do stuff like splitting out the multitests before it
compiles them to JS.

I left all of that alone, so the rest of DDC's test infrastructure is
unchanged. The very first step that builds the "gen" directory just
copies from sdk/tests/..._strong/... instead and the rest is good to go.

I did not move not_yet_strong_tests.dart somewhere more accessible yet
because I'm not sure if kernel needs it or where it should go.

I did not create any status files because DDC doesn't need them and
there are no test suites for the new directories for the other
platforms.
2016-12-09 11:09:55 -08:00

35 lines
775 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 implements B {
}
int inscrutable(int x) => x == 0 ? 0 : x | inscrutable(x & (x - 1));
main() {
var things = [new A(), new B(), new C()];
var a = things[inscrutable(0)];
Expect.isTrue(a is A);
Expect.isFalse(a is B);
Expect.isFalse(a is C);
var b = things[inscrutable(1)];
Expect.isTrue(b is A);
Expect.isTrue(b is B);
Expect.isFalse(b is C);
var c = things[inscrutable(2)];
Expect.isTrue(c is A);
Expect.isTrue(c is B);
Expect.isTrue(c is C);
}