code: /*
  * Copyright 2014 Basis Technology Corp.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
  package com.basistech.tclre;
  
  import com.google.common.base.Charsets;
  import com.google.common.io.Resources;
  import org.junit.Test;
  
  
  public class RexFailTest extends Utils {
  
      private String readFile(String resourceName) throws Exception {
          return Resources.toString(Resources.getResource(resourceName), Charsets.UTF_16LE);
      }
  
      /** This test runs a certain regexp from the REX Japanese toolset against a certain buffer of REX test data
       * from the "Japanese 10MB" which caused a certain failure, namely a "get" of element 1 in a 0 index match array
       * in regexp runtime.java. The solution was that the "cfind" loop should clear the array by nulling its elements,
       * not by resizing it (the C code does the former).  This test forfends regression to that bug; if the bug is present,
       * it blows up.
       */
  
      @Test
      public void testRexFail() throws Exception {
          String data = readFile("bufferFrom2956.UTF-16LE.txt");
          String pattern = readFile("pattern.raw.utf-16LE.txt");
          RePattern pat = HsrePattern.compile(pattern, PatternFlags.ADVANCED, PatternFlags.EXPANDED);
          ReMatcher match = pat.matcher(data);
          match.lookingAt();
      }
  }
  