dart-sdk/tests/language/class_cycle_test.dart
Bob Nystrom 14011f47e3 Resurrect deleted language tests.
They're back from the grave, and ready to party!

Change-Id: I088134a9be7ecabf1fbf751c015a656a15cabff9
Reviewed-on: https://dart-review.googlesource.com/12821
Commit-Queue: Bob Nystrom <rnystrom@google.com>
Reviewed-by: William Hesse <whesse@google.com>
2017-10-11 17:47:11 +00:00

32 lines
846 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.
// Check fail because of cycles in super class relationship.
import "package:expect/expect.dart";
class Foo implements Bar {}
class C {}
class Bar
extends Foo // //# 00: compile-time error
implements Foo // //# 01: compile-time error
{}
class ImplementsC implements C
, C // //# 02: compile-time error
{}
// Spec says: It is a compile-time error if the superclass
// of a class C appears in the implements clause of C.
class ExtendsC extends C
implements C // //# 03: compile-time error
{}
main() {
Expect.isTrue(new Foo() is Foo);
Expect.isTrue(new ImplementsC() is C);
Expect.isTrue(new ExtendsC() is C);
}