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1   package org.apache.maven.plugins.assembly.utils;
2   
3   /*
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *   http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  import junit.framework.TestCase;
23  
24  import java.io.ByteArrayInputStream;
25  import java.io.IOException;
26  
27  import org.codehaus.plexus.util.IOUtil;
28  
29  public class LinuxLineFeedInputStreamTest
30      extends TestCase
31  {
32  
33      public void testSimpleString()
34          throws Exception
35      {
36          assertEquals( "abc\n", roundtrip( "abc" ) );
37      }
38  
39      public void testInTheMiddleOfTheLine()
40          throws Exception
41      {
42          assertEquals( "a\nbc\n", roundtrip( "a\r\nbc" ) );
43      }
44  
45      public void testCrOnly()
46          throws Exception
47      {
48          assertEquals( "a\nb\n", roundtrip( "a\rb" ) );
49      }
50  
51      public void testCrAtEnd()
52          throws Exception
53      {
54          assertEquals( "a\n", roundtrip( "a\r" ) );
55      }
56  
57  
58      public void testMultipleBlankLines()
59          throws Exception
60      {
61          assertEquals( "a\n\nbc\n", roundtrip( "a\r\n\r\nbc" ) );
62      }
63  
64      public void testTwoLinesAtEnd()
65          throws Exception
66      {
67          assertEquals( "a\n\n", roundtrip( "a\r\n\r\n" ) );
68      }
69  
70      public void testRetainLineFeed()
71          throws Exception
72      {
73          assertEquals( "a\n\n", roundtrip( "a\r\n\r\n", false ) );
74          assertEquals( "a", roundtrip( "a", false ) );
75      }
76  
77      private String roundtrip( String msg )
78          throws IOException
79      {
80          return roundtrip( msg, true );
81      }
82  
83      private String roundtrip( String msg, boolean ensure )
84          throws IOException
85      {
86          ByteArrayInputStream baos = new ByteArrayInputStream( msg.getBytes() );
87          
88          LinuxLineFeedInputStream lf  = null;
89          try
90          {
91              lf = new LinuxLineFeedInputStream( baos, ensure );
92              byte[] buf = new byte[ 100 ];
93              final int read = lf.read( buf );
94              final String string = new String( buf, 0, read );
95              lf.close();
96              lf = null;
97              return string;
98          }
99          finally
100         {
101             IOUtil.close( lf );            
102         }
103     }
104 
105 }