// 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.

// @dart = 2.9

/// @assertion Constructs a regular expression.
/// @description Checks that using an invalid pattern results in
///              FormatException.
/// @3rdparty sputnik-v1:S15.10.1_A1_T1.js-S15.10.1_A1_T16.js
/// @author rodionov

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

void check(String pattern) {
  Expect.throws(() {new RegExp(pattern);}, (e) => e is FormatException);
}

main() {
    check("[a---z]");
    check("??");
    check("a**");
    check("**a");
    check("a***");
    check("a???");
    check("a+++");
    check("a++");
    check("++a");
    check("x{0,1}{1,}");
    check("x{1,}{1}");
    check("x{1,2}{1}");
    check("x{1}{1,}");
    check("??a");
    check("?a");
}