/*
    * Copyright (C) 2011, Leonard Broman <leonard.broman@gmail.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;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotNull;
  import static org.junit.Assert.fail;
  
  import java.nio.charset.Charset;
  import java.nio.charset.UnsupportedCharsetException;
  
  import org.eclipse.jgit.lib.Constants;
  import org.junit.Test;
  
  import static java.nio.charset.StandardCharsets.UTF_8;
  
  public class RawParseUtilsTest {
  	String commit = "tree e3a1035abd2b319bb01e57d69b0ba6cab289297e\n" +
  		"parent 54e895b87c0768d2317a2b17062e3ad9f76a8105\n" +
  		"committer A U Thor <author@xample.com 1528968566 +0200\n" +
  		"gpgsig -----BEGIN PGP SIGNATURE-----\n" +
  		" \n" +
  		" wsBcBAABCAAQBQJbGB4pCRBK7hj4Ov3rIwAAdHIIAENrvz23867ZgqrmyPemBEZP\n" +
  		" U24B1Tlq/DWvce2buaxmbNQngKZ0pv2s8VMc11916WfTIC9EKvioatmpjduWvhqj\n" +
  		" znQTFyiMor30pyYsfrqFuQZvqBW01o8GEWqLg8zjf9Rf0R3LlOEw86aT8CdHRlm6\n" +
  		" wlb22xb8qoX4RB+LYfz7MhK5F+yLOPXZdJnAVbuyoMGRnDpwdzjL5Hj671+XJxN5\n" +
  		" SasRdhxkkfw/ZnHxaKEc4juMz8Nziz27elRwhOQqlTYoXNJnsV//wy5Losd7aKi1\n" +
  		" xXXyUpndEOmT0CIcKHrN/kbYoVL28OJaxoBuva3WYQaRrzEe3X02NMxZe9gkSqA=\n" +
  		" =TClh\n" +
  		" -----END PGP SIGNATURE-----\n" +
  		"some other header\n\n" +
  		"commit message";
  
  	@Test
  	public void testParseEncoding_ISO8859_1_encoding() {
  		Charset result = RawParseUtils.parseEncoding(Constants
  				.encodeASCII("encoding ISO-8859-1\n"));
  		assertNotNull(result);
  	}
  
  	@Test
  	public void testParseEncoding_Accept_Latin_One_AsISO8859_1() {
  		Charset result = RawParseUtils.parseEncoding(Constants
  				.encodeASCII("encoding latin-1\n"));
  		assertNotNull(result);
  		assertEquals("ISO-8859-1", result.name());
  	}
  
  	@Test
  	public void testParseEncoding_badEncoding() {
  		try {
  			RawParseUtils.parseEncoding(Constants.encodeASCII("encoding xyz\n"));
  			fail("should throw an UnsupportedCharsetException: xyz");
  		} catch (UnsupportedCharsetException e) {
  			assertEquals("xyz", e.getMessage());
  		}
  	}
  
  	@Test
 	public void testHeaderStart() {
 		byte[] headerName = "some".getBytes(UTF_8);
 		byte[] commitBytes = commit.getBytes(UTF_8);
 		assertEquals(625, RawParseUtils.headerStart(headerName, commitBytes, 0));
 		assertEquals(625, RawParseUtils.headerStart(headerName, commitBytes, 4));
 
 		byte[] missingHeaderName = "missing".getBytes(UTF_8);
 		assertEquals(-1, RawParseUtils.headerStart(missingHeaderName,
 							   commitBytes, 0));
 
 		byte[] fauxHeaderName = "other".getBytes(UTF_8);
 		assertEquals(-1, RawParseUtils.headerStart(fauxHeaderName, commitBytes, 625 + 4));
 	}
 
 	@Test
 	public void testHeaderEnd() {
 		byte[] commitBytes = commit.getBytes(UTF_8);
 		int[] expected = new int[] {45, 93, 148, 619, 637};
 		int start = 0;
 		for (int i = 0; i < expected.length; i++) {
 			start = RawParseUtils.headerEnd(commitBytes, start);
 			assertEquals(expected[i], start);
 			start += 1;
 		}
 	}
 }