blob: ade15d6625995802c502c2714a210b8ab0eae0f5 [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.
/// ...
/// Returns null if the pattern doesn't match.
/// @description Checks that null is returned when appropriate.
/// @author
import "../../../Utils/expect.dart";
main() {
check(r"\d+", "asfjkasfjkhasfj");
check(r"^m", "pairs\nmakes\tdouble");
check(r"s$", "pairs\nmakes\tdouble");
check(r"^p[b-z]", "pairs\nmakes\tdouble\npesos");
check(r"^..^e", "ab\ncde");
check(r"\bot", "pilot\nsoviet robot\topenoffice");
void check(String pattern, String str) {
RegExp re = new RegExp(pattern);