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// Copyright (c) 2018, 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.
/// @assertion In a mixin declaration like
/// mixin A<X extends S, Y extends T> on B, C implements D, E { body }
/// the on clause declares the interfaces B and C as super-class constraints of
/// the mixin. Having a super-class constaint allows the mixin declaration
/// instance members to perform super-invocations (like if they are
/// allowed by a class implementing both B and C. The mixin introduced by A can
/// then only be applied to classes that implement both B and C.
/// @description Checks that it is no compile error if mixin is applied to the
/// class which does implement required interface
/// @author
import "../../Utils/expect.dart";
String console = "";
class A {
bar(num n) {
console = "A";
class B extends A {
bar(covariant int i) {
console = "B";
mixin M on A {
test() {;
class MA extends B with M {}
main() {
new MA().test();
Expect.equals("B", console);