package org.apache.maven.plugins.assembly.utils;
   
   /*
    * 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.
   */
  
  import java.io.ByteArrayInputStream;
  import java.io.IOException;
  
  import org.codehaus.plexus.util.IOUtil;
  import org.junit.Test;
  
  import static org.junit.Assert.assertEquals;
  
  public class LinuxLineFeedInputStreamTest
  {
  
      @Test
      public void testSimpleString()
          throws Exception
      {
          assertEquals( "abc\n", roundtrip( "abc" ) );
      }
  
      @Test
      public void testInTheMiddleOfTheLine()
          throws Exception
      {
          assertEquals( "a\nbc\n", roundtrip( "a\r\nbc" ) );
      }
  
      @Test
      public void testCrOnly()
          throws Exception
      {
          assertEquals( "a\nb\n", roundtrip( "a\rb" ) );
      }
  
      @Test
      public void testCrAtEnd()
          throws Exception
      {
          assertEquals( "a\n", roundtrip( "a\r" ) );
      }
  
  
      @Test
      public void testMultipleBlankLines()
          throws Exception
      {
          assertEquals( "a\n\nbc\n", roundtrip( "a\r\n\r\nbc" ) );
      }
  
      @Test
      public void testTwoLinesAtEnd()
          throws Exception
      {
          assertEquals( "a\n\n", roundtrip( "a\r\n\r\n" ) );
      }
  
      @Test
      public void testRetainLineFeed()
          throws Exception
      {
          assertEquals( "a\n\n", roundtrip( "a\r\n\r\n", false ) );
          assertEquals( "a", roundtrip( "a", false ) );
      }
  
      private String roundtrip( String msg )
          throws IOException
      {
          return roundtrip( msg, true );
      }
  
      private String roundtrip( String msg, boolean ensure )
          throws IOException
      {
          ByteArrayInputStream baos = new ByteArrayInputStream( msg.getBytes() );
          
          LinuxLineFeedInputStream lf  = null;
          try
          {
              lf = new LinuxLineFeedInputStream( baos, ensure );
              byte[] buf = new byte[ 100 ];
             final int read = lf.read( buf );
             final String string = new String( buf, 0, read );
             lf.close();
             lf = null;
             return string;
         }
         finally
         {
             IOUtil.close( lf );            
         }
     }
 
 }