tests/language_2/implicit_downcast_during_super_method_invocation_test.dart

// Copyright (c) 2017, 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 Base {
  void g(B b) {}
}

class C extends Base {
  void f(A a) {
    g(a);
  }
}

main() {
  C c = new C();
  A a1 = new B();
  A a2 = new A();
  c.f(a1); // No error
  Expect.throwsTypeError(() {
    c.f(a2);
  });
}