// Copyright (c) 2017, 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 String replaceFirstMapped(Pattern from,
/// String replace(Match match), [int startIndex = 0])
/// ...
/// If the value returned by calling replace is not a String, it is converted to
/// a String using its toString method, which must then return a string.
/// @description Checks that if the value returned by calling replace is not a
/// String, it is converted to a String using its toString method, which must
/// then return a string
/// @author sgrekhov@unipro.ru

import "../../../Utils/expect.dart";

class C {
  toString() {
    dynamic o = new Object();
    return o;
  }
}

main() {
  Expect.throws(() {"123".replaceFirstMapped("1", (m) {
    dynamic c = new C();
    return c.toString();
  });});
}