LanguageFeatures/nnbd/null_aware_operator_A04_t02.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 If e translates to F then e.m(args) translates to:
///  PASSTHRU[F, fn[x] => x.m(ARGS(args))]
///
/// @description Check that if e translates to F then e.m(args) translates to:
///  PASSTHRU[F, fn[x] => x.m(ARGS(args))]. Test type aliases
/// @author sgrekhov@unipro.ru

// Requirements=nnbd-strong
import '../../Utils/expect.dart';

class C {
  String test1() => "Lily was here";
  String test2(String arg) => arg;
}

typedef CAlias1 = C;
typedef CAlias2 = C?;

main() {
  CAlias1 c1 = new C();
  Expect.equals("Lily was here", c1.test1());
  Expect.equals("Show must go on", c1.test2("Show must go on"));

  CAlias1? c2 = new C();
  if (c2 != null) {
    Expect.equals("Lily was here", c2.test1());
    Expect.equals("Show must go on", c2.test2("Show must go on"));
  }

  CAlias2 c3 = new C();
  if (c3 != null) {
    Expect.equals("Lily was here", c3.test1());
    Expect.equals("Show must go on", c3.test2("Show must go on"));
  }

  CAlias2? c4 = new C();
  if (c4 != null) {
    Expect.equals("Lily was here", c4.test1());
    Expect.equals("Show must go on", c4.test2("Show must go on"));
  }
}