| // 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 An external function is a function whose body is provided |
| /// separately from its declaration. An external function may be a top-level |
| /// function, a method, a getter, a setter or a non-redirecting constructor. |
| /// External functions are introduced via the built-in identifier external |
| /// followed by the function signature. |
| /// An external function is connected to its body by an implementation specific |
| /// mechanism. Attempting to invoke an external function that has not been |
| /// connected to its body will raise a NoSuchMethodError or some subclass |
| /// thereof. |
| /// @description Checks that invoking an external function that is not connected |
| /// to its body indeed results in a NoSuchMethodError or its subclass being |
| /// thrown. |
| /// @Issue 42182 |
| /// @author rodionov |
| |
| import '../../../Utils/expect.dart'; |
| |
| external f(); |
| external g([var x]); |
| external h({var x}); |
| |
| main() { |
| Expect.throws(() { f(); }, (e) => e is NoSuchMethodError); |
| Expect.throws(() { g(); }, (e) => e is NoSuchMethodError); |
| Expect.throws(() { h(); }, (e) => e is NoSuchMethodError); |
| } |