/*
    * Copyright (C) 2008, Google Inc.
    * 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
    *
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   * Redistribution and use in source and binary forms, with or
   * without modification, are permitted provided that the following
   * conditions are met:
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   * - 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
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  package org.eclipse.jgit.util;
  
  import static org.eclipse.jgit.util.QuotedString.GIT_PATH;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertNotSame;
  import static org.junit.Assert.assertSame;
  
  import java.io.UnsupportedEncodingException;
  
  import org.eclipse.jgit.lib.Constants;
  import org.junit.Test;
  
  public class QuotedStringGitPathStyleTest {
  	private static void assertQuote(final String exp, final String in) {
  		final String r = GIT_PATH.quote(in);
  		assertNotSame(in, r);
  		assertFalse(in.equals(r));
  		assertEquals('"' + exp + '"', r);
  	}
  
  	private static void assertDequote(final String exp, final String in) {
  		final byte[] b;
  		try {
  			b = ('"' + in + '"').getBytes("ISO-8859-1");
  		} catch (UnsupportedEncodingException e) {
  			throw new RuntimeException(e);
  		}
  		final String r = GIT_PATH.dequote(b, 0, b.length);
  		assertEquals(exp, r);
  	}
  
  	@Test
  	public void testQuote_Empty() {
  		assertEquals("\"\"", GIT_PATH.quote(""));
  	}
  
  	@Test
  	public void testDequote_Empty1() {
  		assertEquals("", GIT_PATH.dequote(new byte[0], 0, 0));
  	}
  
  	@Test
  	public void testDequote_Empty2() {
  		assertEquals("", GIT_PATH.dequote(new byte[] { '"', '"' }, 0, 2));
  	}
  
  	@Test
  	public void testDequote_SoleDq() {
  		assertEquals("\"", GIT_PATH.dequote(new byte[] { '"' }, 0, 1));
  	}
  
  	@Test
  	public void testQuote_BareA() {
  		final String in = "a";
  		assertSame(in, GIT_PATH.quote(in));
 	}
 
 	@Test
 	public void testDequote_BareA() {
 		final String in = "a";
 		final byte[] b = Constants.encode(in);
 		assertEquals(in, GIT_PATH.dequote(b, 0, b.length));
 	}
 
 	@Test
 	public void testDequote_BareABCZ_OnlyBC() {
 		final String in = "abcz";
 		final byte[] b = Constants.encode(in);
 		final int p = in.indexOf('b');
 		assertEquals("bc", GIT_PATH.dequote(b, p, p + 2));
 	}
 
 	@Test
 	public void testDequote_LoneBackslash() {
 		assertDequote("\\", "\\");
 	}
 
 	@Test
 	public void testQuote_NamedEscapes() {
 		assertQuote("\\a", "\u0007");
 		assertQuote("\\b", "\b");
 		assertQuote("\\f", "\f");
 		assertQuote("\\n", "\n");
 		assertQuote("\\r", "\r");
 		assertQuote("\\t", "\t");
 		assertQuote("\\v", "\u000B");
 		assertQuote("\\\\", "\\");
 		assertQuote("\\\"", "\"");
 	}
 
 	@Test
 	public void testDequote_NamedEscapes() {
 		assertDequote("\u0007", "\\a");
 		assertDequote("\b", "\\b");
 		assertDequote("\f", "\\f");
 		assertDequote("\n", "\\n");
 		assertDequote("\r", "\\r");
 		assertDequote("\t", "\\t");
 		assertDequote("\u000B", "\\v");
 		assertDequote("\\", "\\\\");
 		assertDequote("\"", "\\\"");
 	}
 
 	@Test
 	public void testDequote_OctalAll() {
 		for (int i = 0; i < 127; i++) {
 			assertDequote("" + (char) i, octalEscape(i));
 		}
 		for (int i = 128; i < 256; i++) {
 			int f = 0xC0 | (i >> 6);
 			int s = 0x80 | (i & 0x3f);
 			assertDequote("" + (char) i, octalEscape(f)+octalEscape(s));
 		}
 	}
 
 	private static String octalEscape(int i) {
 		String s = Integer.toOctalString(i);
 		while (s.length() < 3) {
 			s = "0" + s;
 		}
 		return "\\"+s;
 	}
 
 	@Test
 	public void testQuote_OctalAll() {
 		assertQuote("\\001", "\1");
 		assertQuote("\\177", "\u007f");
 		assertQuote("\\303\\277", "\u00ff"); // \u00ff in UTF-8
 	}
 
 	@Test
 	public void testDequote_UnknownEscapeQ() {
 		assertDequote("\\q", "\\q");
 	}
 
 	@Test
 	public void testDequote_FooTabBar() {
 		assertDequote("foo\tbar", "foo\\tbar");
 	}
 
 	@Test
 	public void testDequote_Latin1() {
 		assertDequote("\u00c5ngstr\u00f6m", "\\305ngstr\\366m"); // Latin1
 	}
 
 	@Test
 	public void testDequote_UTF8() {
 		assertDequote("\u00c5ngstr\u00f6m", "\\303\\205ngstr\\303\\266m");
 	}
 
 	@Test
 	public void testDequote_RawUTF8() {
 		assertDequote("\u00c5ngstr\u00f6m", "\303\205ngstr\303\266m");
 	}
 
 	@Test
 	public void testDequote_RawLatin1() {
 		assertDequote("\u00c5ngstr\u00f6m", "\305ngstr\366m");
 	}
 
 	@Test
 	public void testQuote_Ang() {
 		assertQuote("\\303\\205ngstr\\303\\266m", "\u00c5ngstr\u00f6m");
 	}
 
 	@Test
 	public void testQuoteAtAndNumber() {
 		assertSame("abc@2x.png", GIT_PATH.quote("abc@2x.png"));
 		assertDequote("abc@2x.png", "abc\\1002x.png");
 	}
 }