blob: a99c3c94f593b70d322b6b846b979d847c7c03b6 [file] [log] [blame]
// Copyright (c) 2016, 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 Match matchAsPrefix(String string, [int start = 0])
/// Match this pattern against the start of string.
/// ...
/// @description Checks that if str is null then exception is thrown
/// @author
import "../../../Utils/expect.dart";
dynamic getNull() => null;
main() {
check("AE", 0, false, true);
check("(a|cd)+|ef", 1, false, true);
check(".+: gr(a|e)y", 1, false, false);
check("((a)|(ab))((c)|(bc))", 0, false, false);
check(r"^(a+)\1*,\1+$", 1, false, false);
check(r"^(a+?)\1*,\1+$", 0, true, false);
check("(z)((a+)?(b+)?(c))*", 0, true, true);
void check(String pattern, int start, bool multiLine,
bool ignoreCase) {
RegExp re = new RegExp(pattern, multiLine: multiLine,
caseSensitive: !ignoreCase);
Expect.throws(() { re.matchAsPrefix(getNull(), start); });