LanguageFeatures/Extension-methods/explicit_extension_member_invocation_A14_t01.dart

/*
 * Copyright (c) 2019, 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 A simple member invocation on a target expression X is an
 * expression of one of the forms:
 * Member invocation on target X	     Corresponding member name
 *        X<types>(args)	                      call
 * @description Check explicit extension member invocation in form of
 * X<types>(args)
 * @author sgrekhov@unipro.ru
 */

import "../../Utils/expect.dart";

class C {
  String call<X, Y>(X x, Y y) => "C:$x:$y";
}

extension Extension1 on C {
  String call<X, Y>(X x, Y y) => "Extension1:$x:$y";
}

extension Extension2 on C {
  String call<X, Y>(X x, Y y) => "Extension2:$x:$y";
}

main() {
  C c = C();
  Expect.equals("Extension1:Lily was here:42", Extension1(c)<String, int>("Lily was here", 42));
  Expect.equals("Extension2:Lily was here:42", Extension2(c)<String, int>("Lily was here", 42));
  Expect.equals("C:Lily was here:42", c<String, int>("Lily was here", 42));
}