Language/Expressions/Throw/evaluation_t04.dart

// 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 Evaluation of a throw expression of the form throw e; proceeds as
/// follows:
/// The expression e is evaluated yielding a value v.
/// If v evaluates to null, then a NullThrownError is thrown. Otherwise, control
/// is transferred to the nearest dynamically enclosing exception handler, with
/// the current exception set to v and the current return value becomes
/// undefined.
/// @description Checks that attempting to throw null in any manner results in
/// NullThrownError being thrown instead.
/// @author rodionov

import '../../../Utils/expect.dart';

n() => null;
n2() {}

main() {
  Expect.throws(() { throw n() ; }, (e) => e is NullThrownError);
  Expect.throws(() { throw n2(); }, (e) => e is NullThrownError);
}