/*
    * Copyright (C) 2010, Marc Strapetz <marc.strapetz@syntevo.com>
    * and other copyright owners as documented in the project's IP log.
    *
    * This program and the accompanying materials are made available
    * under the terms of the Eclipse Distribution License v1.0 which
    * accompanies this distribution, is reproduced below, and is
    * available at http://www.eclipse.org/org/documents/edl-v10.php
    *
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or
   * without modification, are permitted provided that the following
   * conditions are met:
   *
   * - Redistributions of source code must retain the above copyright
   *   notice, this list of conditions and the following disclaimer.
   *
   * - Redistributions in binary form must reproduce the above
   *   copyright notice, this list of conditions and the following
   *   disclaimer in the documentation and/or other materials provided
   *   with the distribution.
   *
   * - Neither the name of the Eclipse Foundation, Inc. nor the
   *   names of its contributors may be used to endorse or promote
   *   products derived from this software without specific prior
   *   written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
   * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
   * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  package org.eclipse.jgit.util.io;
  
  import static org.junit.Assert.assertEquals;
  
  import java.io.ByteArrayInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.UnsupportedEncodingException;
  
  import org.junit.Test;
  
  public class EolCanonicalizingInputStreamTest {
  
  	@Test
  	public void testLF() throws IOException {
  		final byte[] bytes = asBytes("1\n2\n3");
  		test(bytes, bytes, false);
  	}
  
  	@Test
  	public void testCR() throws IOException {
  		final byte[] bytes = asBytes("1\r2\r3");
  		test(bytes, bytes, false);
  	}
  
  	@Test
  	public void testCRLF() throws IOException {
  		test(asBytes("1\r\n2\r\n3"), asBytes("1\n2\n3"), false);
  	}
  
  	@Test
  	public void testLFCR() throws IOException {
  		final byte[] bytes = asBytes("1\n\r2\n\r3");
  		test(bytes, bytes, false);
  	}
  
  	@Test
  	public void testEmpty() throws IOException {
  		final byte[] bytes = asBytes("");
  		test(bytes, bytes, false);
  	}
  
  	@Test
  	public void testBinaryDetect() throws IOException {
  		final byte[] bytes = asBytes("1\r\n2\r\n3\0");
  		test(bytes, bytes, true);
  	}
  
  	@Test
  	public void testBinaryDontDetect() throws IOException {
  		test(asBytes("1\r\n2\r\n3\0"), asBytes("1\n2\n3\0"), false);
  	}
  
  	private static void test(byte[] input, byte[] expected,
  			boolean detectBinary) throws IOException {
  		final InputStream bis1 = new ByteArrayInputStream(input);
 		final InputStream cis1 = new EolCanonicalizingInputStream(bis1, detectBinary);
 		int index1 = 0;
 		for (int b = cis1.read(); b != -1; b = cis1.read()) {
 			assertEquals(expected[index1], (byte) b);
 			index1++;
 		}
 
 		assertEquals(expected.length, index1);
 
 		for (int bufferSize = 1; bufferSize < 10; bufferSize++) {
 			final byte[] buffer = new byte[bufferSize];
 			final InputStream bis2 = new ByteArrayInputStream(input);
 			final InputStream cis2 = new EolCanonicalizingInputStream(bis2, detectBinary);
 
 			int read = 0;
 			for (int readNow = cis2.read(buffer, 0, buffer.length); readNow != -1
 					&& read < expected.length; readNow = cis2.read(buffer, 0,
 					buffer.length)) {
 				for (int index2 = 0; index2 < readNow; index2++) {
 					assertEquals(expected[read + index2], buffer[index2]);
 				}
 				read += readNow;
 			}
 
 			assertEquals(expected.length, read);
 			cis2.close();
 		}
 		cis1.close();
 	}
 
 	private static byte[] asBytes(String in) {
 		try {
 			return in.getBytes("UTF-8");
 		} catch (UnsupportedEncodingException ex) {
 			throw new AssertionError();
 		}
 	}
 }