tests/language_2/interface/duplicate_interface_implements_test.dart

// Copyright (c) 2013, 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.

// @dart = 2.9

import "duplicate_interface_lib.dart" as alib;
import "duplicate_interface_lib.dart" show InterfA;

// Expect error since InterfA and alib.InterfA refer to the same interface.
class Foo implements InterfA
    , alib.InterfA
    //^^^^^^^^^^^^
    // [analyzer] COMPILE_TIME_ERROR.IMPLEMENTS_REPEATED
    // [cfe] 'InterfA' can only be implemented once.
{}

main() {
  new Foo();
}