content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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 org.apache.chemistry.opencmis.server.support.query;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNull;
  
  import org.junit.Test;
  
  public class StringUtilTest {
      
      @Test
      public void testUnescape() {
          String s = "abc";
          String res = StringUtil.unescape(s, null);
          assertEquals("abc", res);
          
          s="ab\\\\c";
          res = StringUtil.unescape(s, null);
          assertEquals("ab\\c", res);
  
          s="ab\\'c";
          res = StringUtil.unescape(s, null);
          assertEquals("ab'c", res);
          
          s="ab\\'";
          res = StringUtil.unescape(s, null);
          assertEquals("ab'", res);
  
          s="\\\\abc";
          res = StringUtil.unescape(s, null);
          assertEquals("\\abc", res);
          
          s="abc\\\\";
          res = StringUtil.unescape(s, null);
          assertEquals("abc\\", res);
          
          s="abc\\";
          res = StringUtil.unescape(s, null);
          assertNull(res);
  
          s="ab\\xc";
          res = StringUtil.unescape(s, null);
          assertNull(res);
      
          s="ab\\xc";
          res = StringUtil.unescape(s, "\\'x");
          assertEquals("abxc", res);
          
          s="abc\\x";
          res = StringUtil.unescape(s, "\\'x");
          assertEquals("abcx", res);
  
          s="ab\\yc";
          res = StringUtil.unescape(s, "\\'x");
          assertNull(res);
  
          // double escaping
          s="ab\\\\\\\\c";
          res = StringUtil.unescape(s, null);
          assertEquals("ab\\\\c", res);
  
          s="ab\\\\'c";
          res = StringUtil.unescape(s, null);
          assertEquals("ab\\'c", res);
          
          s="ab\\'Johnny\\'c";
          res = StringUtil.unescape(s, null);
          assertEquals("ab'Johnny'c", res);
  
          s="ab\\\\'Johnny\\\\'c";
          res = StringUtil.unescape(s, null);
          assertEquals("ab\\'Johnny\\'c", res);
  
          s="\\\\";
          res = StringUtil.unescape(s, null);
          assertEquals("\\", res);
  
          s="\\";
          res = StringUtil.unescape(s, null);
          assertNull(res);
  
          s="a";
          res = StringUtil.unescape(s, null);
          assertEquals("a", res);
          
          s="";
          res = StringUtil.unescape(s, null);
          assertEquals("", res);
  
          res = StringUtil.unescape(null, null);
          assertNull(res);
      }
  
  }
  