LanguageFeatures/nnbd/late_A06_t05.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 write to a field or variable which is marked final and late is a
/// runtime error unless the field or variable was declared with no initializer
/// expression, and there have been no previous writes to the field or variable
/// (including via an initializing formal or an initializer list entry).
///
/// @description Check that if a final late variable is declared with no
/// initializer expression, and there have been no previous writes to it, then
/// write attempt to this field or variable is not an error, but the second
/// attempt of write to it is a runtime error
/// @author sgrekhov@unipro.ru
/// @issue 39802

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

class C {
  static late final String? s;
  late final String? v;
}

late final String? g;

main() {
  C.s = "No";
  Expect.throws(() {C.s = "Lily was here";});
  Expect.equals("No", C.s);

  C c = new C();
  c.v = "woman";
  Expect.throws(() {c.v = "Lily was here";});
  Expect.equals("woman", c.v);

  g = "no";
  Expect.throws(() {g = "Lily was here";});
  Expect.equals("no", g);
}