| // Copyright (c) 2011, 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 The expression !e is equivalent to the expression |
| /// e ? false : true. |
| /// @description Checks that, just like with conditional expressions, it is |
| /// a dynamic type error when e is not a boolean and it is subjected to a boolean |
| /// conversion |
| /// @author rodionov |
| |
| // Requirements=nnbd-strong |
| import '../../../Utils/expect.dart'; |
| import '../../../Utils/dynamic_check.dart'; |
| |
| main() { |
| var v = null; |
| checkTypeError(() { Expect.isTrue(!v); }); |
| v = "true, honestly"; |
| checkTypeError(() { Expect.isTrue(!v); }); |
| v = () {}; |
| checkTypeError(() { Expect.isTrue(!v); }); |
| } |