context: //
  // System.IO.Path Test Cases
  //
  // Authors:
  // 	Marcin Szczepanski (marcins@zipworld.com.au)
  // 	Gonzalo Paniagua Javier (gonzalo@ximian.com)
  //	Ben Maurer (bmaurer@users.sf.net)
  //	Gilles Freart (gfr@skynet.be)
  //	Atsushi Enomoto (atsushi@ximian.com)
  //	Sebastien Pouliot  <sebastien@ximian.com>
  //
  // (c) Marcin Szczepanski 
  // (c) 2002 Ximian, Inc. (http://www.ximian.com)
  // (c) 2003 Ben Maurer
  // (c) 2003 Gilles Freart
  // Copyright (C) 2005 Novell, Inc (http://www.novell.com)
  //
  
  using NUnit.Framework;
  using System.IO;
  using System;
  using System.Text;
  
  namespace MonoTests.System.IO
  {
  	enum OsType {
  		Windows,
  		Unix,
  		Mac
  	}
  
  	[TestFixture]
  	public class PathTest
  	{
  		static string path1;
  		static string path2;
  		static string path3;
  		static OsType OS;
  		static char DSC = Path.DirectorySeparatorChar;
  
  		[SetUp]
  		public void SetUp ()
  		{
  			if ('/' == DSC) {
  				OS = OsType.Unix;
  				path1 = "/foo/test.txt";
  				path2 = "/etc";
  				path3 = "init.d";
  			} else if ('\\' == DSC) {
  				OS = OsType.Windows;
  				path1 = "c:\\foo\\test.txt";
  				path2 = Environment.GetEnvironmentVariable ("SYSTEMROOT");
  				path3 = "system32";
  			} else {
  				OS = OsType.Mac;
  				//FIXME: For Mac. figure this out when we need it
  				path1 = "foo:test.txt";
  				path2 = "foo";
  				path3 = "bar";
  			}
  		}
  
  		bool Windows
  		{
  			get {
  				return OS == OsType.Windows;
  			}
  		}
  
  		bool Unix
  		{
  			get {
  				return OS == OsType.Unix;
  			}
  		}
  
  		bool Mac
  		{
  			get {
  				return OS == OsType.Mac;
  			}
  		}
  
  		[Test]
  		public void ChangeExtension ()
  		{
  			string [] files = new string [3];
  			files [(int) OsType.Unix] = "/foo/test.doc";
  			files [(int) OsType.Windows] = "c:\\foo\\test.doc";
  			files [(int) OsType.Mac] = "foo:test.doc";
  
  			string testPath = Path.ChangeExtension (path1, "doc");
  			Assert.AreEqual (files [(int) OS], testPath, "ChangeExtension #01");
  
  			testPath = Path.ChangeExtension (String.Empty, ".extension");
  			Assert.AreEqual (String.Empty, testPath, "ChangeExtension #02");
  
  			testPath = Path.ChangeExtension (null, ".extension");
  			Assert.AreEqual (null, testPath, "ChangeExtension #03");
  
  			testPath = Path.ChangeExtension ("path", null);
  			Assert.AreEqual ("path", testPath, "ChangeExtension #04");
  
  			testPath = Path.ChangeExtension ("path.ext", "doc");
  			Assert.AreEqual ("path.doc", testPath, "ChangeExtension #05");
  
  			testPath = Path.ChangeExtension ("path.ext1.ext2", "doc");
  			Assert.AreEqual ("path.ext1.doc", testPath, "ChangeExtension #06");
  
  			testPath = Path.ChangeExtension ("hogehoge.xml", ".xsl");
  			Assert.AreEqual ("hogehoge.xsl", testPath, "ChangeExtension #07");
  			testPath = Path.ChangeExtension ("hogehoge", ".xsl");
  			Assert.AreEqual ("hogehoge.xsl", testPath, "ChangeExtension #08");
  			testPath = Path.ChangeExtension ("hogehoge.xml", "xsl");
  			Assert.AreEqual ("hogehoge.xsl", testPath, "ChangeExtension #09");
  			testPath = Path.ChangeExtension ("hogehoge", "xsl");
  			Assert.AreEqual ("hogehoge.xsl", testPath, "ChangeExtension #10");
  			testPath = Path.ChangeExtension ("hogehoge.xml", String.Empty);
  			Assert.AreEqual ("hogehoge.", testPath, "ChangeExtension #11");
  			testPath = Path.ChangeExtension ("hogehoge", String.Empty);
  			Assert.AreEqual ("hogehoge.", testPath, "ChangeExtension #12");
  			testPath = Path.ChangeExtension ("hogehoge.", null);
  			Assert.AreEqual ("hogehoge", testPath, "ChangeExtension #13");
  			testPath = Path.ChangeExtension ("hogehoge", null);
  			Assert.AreEqual ("hogehoge", testPath, "ChangeExtension #14");
  			testPath = Path.ChangeExtension (String.Empty, null);
  			Assert.AreEqual (String.Empty, testPath, "ChangeExtension #15");
  			testPath = Path.ChangeExtension (String.Empty, "bashrc");
  			Assert.AreEqual (String.Empty, testPath, "ChangeExtension #16");
  			testPath = Path.ChangeExtension (String.Empty, ".bashrc");
  			Assert.AreEqual (String.Empty, testPath, "ChangeExtension #17");
  			testPath = Path.ChangeExtension (null, null);
  			Assert.IsNull (testPath, "ChangeExtension #18");
  		}
  
  		[Test]
  		public void ChangeExtension_Extension_InvalidPathChars () 
  		{
  			string fn = Path.ChangeExtension ("file.ext", "<");
  			Assert.AreEqual ("file.<", fn, "Invalid filename");
  		}
  
  		[Test]
  		public void ChangeExtension_Path_InvalidPathChars ()
  		{
  			try {
  				Path.ChangeExtension ("fi\0le.ext", ".extension");
  				Assert.Fail ("#1");
  			} catch (ArgumentException ex) {
  				// Illegal characters in path
  				Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#2");
  				Assert.IsNull (ex.InnerException, "#3");
  				Assert.IsNotNull (ex.Message, "#4");
  				Assert.IsNull (ex.ParamName, "#5");
  			}
  		}
  
  		[Test]
  		public void Combine ()
  		{
  			string [] files = new string [3];
  			files [(int) OsType.Unix] = "/etc/init.d";
  			files [(int) OsType.Windows] = Environment.GetEnvironmentVariable ("SYSTEMROOT") + @"\system32";
  			files [(int) OsType.Mac] = "foo:bar";
  
  			string testPath = Path.Combine (path2, path3);
  			Assert.AreEqual (files [(int) OS], testPath, "Combine #01");
  
  			testPath = Path.Combine ("one", String.Empty);
  			Assert.AreEqual ("one", testPath, "Combine #02");
  
  			testPath = Path.Combine (String.Empty, "one");
  			Assert.AreEqual ("one", testPath, "Combine #03");
  
  			string current = Directory.GetCurrentDirectory ();
  			testPath = Path.Combine (current, "one");
  
  			string expected = current + DSC + "one";
  			Assert.AreEqual (expected, testPath, "Combine #04");
  
  			testPath = Path.Combine ("one", current);
  			// LAMESPEC noted in Path.cs
  			Assert.AreEqual (current, testPath, "Combine #05");
  
  			testPath = Path.Combine (current, expected);
  			Assert.AreEqual (expected, testPath, "Combine #06");
  
  			testPath = DSC + "one";
  			testPath = Path.Combine (testPath, "two" + DSC);
  			expected = DSC + "one" + DSC + "two" + DSC;
  			Assert.AreEqual (expected, testPath, "Combine #06");
  
  			testPath = "one" + DSC;
  			testPath = Path.Combine (testPath, DSC + "two");
  			expected = DSC + "two";
  			Assert.AreEqual (expected, testPath, "Combine #06");
  
  			testPath = "one" + DSC;
  			testPath = Path.Combine (testPath, "two" + DSC);
  			expected = "one" + DSC + "two" + DSC;
  			Assert.AreEqual (expected, testPath, "Combine #07");
  
  #if NET_4_0
  			Assert.AreEqual ("a", Path.Combine (new [] { "a", "" }), "Combine #08");
  #endif
  		}
  
  		[Test]
  		public void Combine_Path1_InvalidPathChars ()
  		{
  			try {
  				Path.Combine ("a\0", "one");
  				Assert.Fail ("#1");
  			} catch (ArgumentException ex) {
  				// Illegal characters in path
  				Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#2");
  				Assert.IsNull (ex.InnerException, "#3");
  				Assert.IsNotNull (ex.Message, "#4");
  				Assert.IsNull (ex.ParamName, "#5");
  			}
  		}
  
  		[Test]
  		public void Combine_Path1_Null ()
  		{
  			try {
  				Path.Combine (null, "one");
  				Assert.Fail ("#1");
  			} catch (ArgumentNullException ex) {
  				Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");
  				Assert.IsNull (ex.InnerException, "#3");
  				Assert.IsNotNull (ex.Message, "#4");
  				Assert.AreEqual ("path1", ex.ParamName, "#5");
  			}
  		}
  
  		[Test]
  		public void Combine_Path2_InvalidPathChars ()
  		{
  			try {
  				Path.Combine ("one", "a\0");
  				Assert.Fail ("#1");
  			} catch (ArgumentException ex) {
  				// Illegal characters in path
  				Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#2");
  				Assert.IsNull (ex.InnerException, "#3");
  				Assert.IsNotNull (ex.Message, "#4");
  				Assert.IsNull (ex.ParamName, "#5");
  			}
  		}
  
  		[Test]
  		public void Combine_Path2_Null ()
  		{
  			try {
  				Path.Combine ("one", null);
  				Assert.Fail ("#1");
  			} catch (ArgumentNullException ex) {
  				Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");
  				Assert.IsNull (ex.InnerException, "#3");
  				Assert.IsNotNull (ex.Message, "#4");
  				Assert.AreEqual ("path2", ex.ParamName, "#5");
  			}
  		}
  
  		[Test]
  		public void GetDirectoryName ()
  		{
  			string [] files = new string [3];
  			files [(int) OsType.Unix] = "/foo";
  			files [(int) OsType.Windows] = "c:\\foo";
  			files [(int) OsType.Mac] = "foo";
  
  			string testDirName = Path.GetDirectoryName (path1);
  			Assert.AreEqual (files [(int) OS], testDirName, "#A1");
  			testDirName = Path.GetDirectoryName (files [(int) OS] + DSC);
  			Assert.AreEqual (files [(int) OS], testDirName, "#A2");
  
  			if (Windows) {
  				Assert.AreEqual ("C:\\foo", Path.GetDirectoryName ("C:\\foo\\foo.txt"), "#B1");
  				Assert.AreEqual (null, Path.GetDirectoryName ("C:"), "#B2");
  				Assert.AreEqual (null, Path.GetDirectoryName (@"C:\"), "#B3");
  				Assert.AreEqual (@"C:\", Path.GetDirectoryName (@"C:\dir"), "#B4");
  				Assert.AreEqual (@"C:\dir", Path.GetDirectoryName (@"C:\dir\"), "#B5");
  				Assert.AreEqual (@"C:\dir", Path.GetDirectoryName (@"C:\dir\dir"), "#B6");
  				Assert.AreEqual (@"C:\dir\dir", Path.GetDirectoryName (@"C:\dir\dir\"), "#B7");
  				Assert.AreEqual (@"C:", Path.GetDirectoryName (@"C:foo.txt"), "#B8");
  				Assert.AreEqual (@"C:dir", Path.GetDirectoryName (@"C:dir\"), "#B9");
  
  				Assert.AreEqual ("\\foo\\bar", Path.GetDirectoryName ("/foo//bar/dingus"), "#C1");
  				Assert.AreEqual ("foo\\bar", Path.GetDirectoryName ("foo/bar/"), "#C2");
  				Assert.AreEqual ("foo\\bar", Path.GetDirectoryName ("foo/bar\\xxx"), "#C3");
  				Assert.AreEqual ("\\\\host\\dir\\dir2", Path.GetDirectoryName ("\\\\host\\dir\\\\dir2\\path"), "#C4");
  
  				// UNC tests
  				Assert.AreEqual (null, Path.GetDirectoryName (@"\\"), "#D1");
  				Assert.AreEqual (null, Path.GetDirectoryName (@"\\server"), "#D2");
  				Assert.AreEqual (null, Path.GetDirectoryName (@"\\server\share"), "#D3");
  				Assert.AreEqual (@"\\server\share", Path.GetDirectoryName (@"\\server\share\"), "#D4");
  				Assert.AreEqual (@"\\server\share", Path.GetDirectoryName (@"\\server\share\dir"), "#D5");
  				Assert.AreEqual (@"\\server\share\dir", Path.GetDirectoryName (@"\\server\share\dir\subdir"), "#D6");
  			} else {
  				Assert.AreEqual ("/etc", Path.GetDirectoryName ("/etc/hostname"), "#B1");
  				Assert.AreEqual ("/foo/bar", Path.GetDirectoryName ("/foo//bar/dingus"), "#B2");
  				Assert.AreEqual ("foo/bar", Path.GetDirectoryName ("foo/bar/"), "#B3");
  				Assert.AreEqual ("/", Path.GetDirectoryName ("/tmp"), "#B4");
  				Assert.IsNull (Path.GetDirectoryName ("/"), "#B5");
  				Assert.AreEqual ("a", Path.GetDirectoryName ("a//b"), "#B6");
  			}
  		}
  
  		[Test]
  		public void GetDirectoryName_Path_Empty ()
  		{
  			try {
  				Path.GetDirectoryName (String.Empty);
  				Assert.Fail ("#1");
  			} catch (ArgumentException ex) {
  				// The path is not of a legal form
  				Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#2");
  				Assert.IsNull (ex.InnerException, "#3");
  				Assert.IsNotNull (ex.Message, "#4");
  				Assert.IsNull (ex.ParamName, "#5");
  			}
  		}
  
  		[Test]
  		public void GetDirectoryName_Path_InvalidPathChars ()
  		{
  			try {
  				Path.GetDirectoryName ("hi\0world");
  				Assert.Fail ("#1");
  			} catch (ArgumentException ex) {
  				// Illegal characters in path
  				Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#2");
  				Assert.IsNull (ex.InnerException, "#3");
  				Assert.IsNotNull (ex.Message, "#4");
  				Assert.IsNull (ex.ParamName, "#5");
  			}
  		}
  
  		[Test]
  		public void GetDirectoryName_Path_Null ()
  		{
  			Assert.IsNull (Path.GetDirectoryName (null));
  		}
  
  		[Test]
  		public void GetDirectoryName_Path_Whitespace ()
  		{
  			try {
  				Path.GetDirectoryName ("   ");
  				Assert.Fail ("#1");
  			} catch (ArgumentException ex) {
  				// The path is not of a legal form
  				Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#2");
  				Assert.IsNull (ex.InnerException, "#3");
  				Assert.IsNotNull (ex.Message, "#4");
  				Assert.IsNull (ex.ParamName, "#5");
  			}
  		}
  
  		[Test]
  		public void GetExtension ()
  		{
  			string testExtn = Path.GetExtension (path1);
  
  			Assert.AreEqual (".txt", testExtn, "GetExtension #01");
  
  			testExtn = Path.GetExtension (path2);
  			Assert.AreEqual (String.Empty, testExtn, "GetExtension #02");
  
  			testExtn = Path.GetExtension (String.Empty);
  			Assert.AreEqual (String.Empty, testExtn, "GetExtension #03");
  
  			testExtn = Path.GetExtension (null);
  			Assert.AreEqual (null, testExtn, "GetExtension #04");
  
  			testExtn = Path.GetExtension (" ");
  			Assert.AreEqual (String.Empty, testExtn, "GetExtension #05");
  
  			testExtn = Path.GetExtension (path1 + ".doc");
  			Assert.AreEqual (".doc", testExtn, "GetExtension #06");
  
  			testExtn = Path.GetExtension (path1 + ".doc" + DSC + "a.txt");
  			Assert.AreEqual (".txt", testExtn, "GetExtension #07");
  
  			testExtn = Path.GetExtension (".");
  			Assert.AreEqual (String.Empty, testExtn, "GetExtension #08");
  
  			testExtn = Path.GetExtension ("end.");
  			Assert.AreEqual (String.Empty, testExtn, "GetExtension #09");
  
  			testExtn = Path.GetExtension (".start");
  			Assert.AreEqual (".start", testExtn, "GetExtension #10");
  
  			testExtn = Path.GetExtension (".a");
  			Assert.AreEqual (".a", testExtn, "GetExtension #11");
  
  			testExtn = Path.GetExtension ("a.");
  			Assert.AreEqual (String.Empty, testExtn, "GetExtension #12");
  
  			testExtn = Path.GetExtension ("a");
  			Assert.AreEqual (String.Empty, testExtn, "GetExtension #13");
  
  			testExtn = Path.GetExtension ("makefile");
  			Assert.AreEqual (String.Empty, testExtn, "GetExtension #14");
  		}
  
  		[Test]
  		public void GetExtension_Path_InvalidPathChars ()
  		{
  			try {
  				Path.GetExtension ("hi\0world.txt");
  				Assert.Fail ("#1");
  			} catch (ArgumentException ex) {
  				// Illegal characters in path.
  				Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#2");
  				Assert.IsNull (ex.InnerException, "#3");
  				Assert.IsNotNull (ex.Message, "#4");
  				Assert.IsNull (ex.ParamName, "#5");
  			}
  		}
  
  		[Test]
  		public void GetFileName ()
  		{
  			string testFileName = Path.GetFileName (path1);
  
  			Assert.AreEqual ("test.txt", testFileName, "#1");
  			testFileName = Path.GetFileName (null);
  			Assert.AreEqual (null, testFileName, "#2");
  			testFileName = Path.GetFileName (String.Empty);
  			Assert.AreEqual (String.Empty, testFileName, "#3");
  			testFileName = Path.GetFileName (" ");
  			Assert.AreEqual (" ", testFileName, "#4");
  		}
  
  		[Test]
  		public void GetFileName_Path_InvalidPathChars ()
  		{
  			try {
  				Path.GetFileName ("hi\0world");
  				Assert.Fail ("#1");
  			} catch (ArgumentException ex) {
  				// Illegal characters in path
  				Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#2");
  				Assert.IsNull (ex.InnerException, "#3");
  				Assert.IsNotNull (ex.Message, "#4");
  				Assert.IsNull (ex.ParamName, "#5");
  			}
  		}
  
  		[Test]
  		public void GetFileNameWithoutExtension ()
  		{
  			string testFileName = Path.GetFileNameWithoutExtension (path1);
  
  			Assert.AreEqual ("test", testFileName, "GetFileNameWithoutExtension #01");
  
  			testFileName = Path.GetFileNameWithoutExtension (null);
  			Assert.AreEqual (null, testFileName, "GetFileNameWithoutExtension #02");
  
  			testFileName = Path.GetFileNameWithoutExtension (String.Empty);
  			Assert.AreEqual (String.Empty, testFileName, "GetFileNameWithoutExtension #03");
  		}
  
  		[Test]
  		public void GetFileNameWithoutExtension_Path_InvalidPathChars ()
  		{
  			try {
  				Path.GetFileNameWithoutExtension ("hi\0world");
  				Assert.Fail ("#1");
  			} catch (ArgumentException ex) {
  				// Illegal characters in path
  				Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#2");
  				Assert.IsNull (ex.InnerException, "#3");
  				Assert.IsNotNull (ex.Message, "#4");
  				Assert.IsNull (ex.ParamName, "#5");
  			}
  		}
  
  		[Test]
  		public void GetFullPath ()
  		{
  			string current = Directory.GetCurrentDirectory ();
  
  			string testFullPath = Path.GetFullPath ("foo.txt");
  			string expected = current + DSC + "foo.txt";
  			Assert.AreEqual (expected, testFullPath, "GetFullPath #01");
  
  			testFullPath = Path.GetFullPath ("a//./.././foo.txt");
  			Assert.AreEqual (expected, testFullPath, "GetFullPath #02");
  
  			if (!Windows){
  				Assert.AreEqual ("/bin/bash", Path.GetFullPath ("/../bin/bash"));
  			}
  				
  		}
  
  		[Test]
  		public void GetFullPath_Unix ()
  		{
  			if (Windows)
  				Assert.Ignore ("Running on Windows.");
  
  			string root =  "/";
  			string [,] test = new string [,] {
  				{"root////././././././../root/././../root", "root"},
  				{"root/", "root/"},
  				{"root/./", "root/"},
  				{"root/./", "root/"},
  				{"root/../", String.Empty},
  				{"root/../", String.Empty},
  				{"root/../..", String.Empty},
  				{"root/.hiddenfile", "root/.hiddenfile"},
  				{"root/. /", "root/. /"},
  				{"root/.. /", "root/.. /"},
  				{"root/..weirdname", "root/..weirdname"},
  				{"root/..", String.Empty},
  				{"root/../a/b/../../..", String.Empty},
  				{"root/./..", String.Empty},
  				{"..", String.Empty},
  				{".", String.Empty},
  				{"root//dir", "root/dir"},
  				{"root/.              /", "root/.              /"},
  				{"root/..             /", "root/..             /"},
  				{"root/      .              /", "root/      .              /"},
  				{"root/      ..             /", "root/      ..             /"},
  				{"root/./", "root/"},
  				//ERROR! Paths are trimmed
  				// I don't understand this comment^^.
  				// No trimming occurs but the paths are not equal. That's why the test fails. Commented out.
  				//{"root/..                      /", "root/..                   /"},
  				{".//", String.Empty}
  			};
  
  			for (int i = 0; i < test.GetUpperBound (0); i++) {
  				Assert.AreEqual (root + test [i, 1], Path.GetFullPath (root + test [i, 0]),
  						 String.Format ("GetFullPathUnix #{0}", i));
  			}
  
  			Assert.AreEqual ("/", Path.GetFullPath ("/"), "#01");
  			Assert.AreEqual ("/hey", Path.GetFullPath ("/hey"), "#02");
  			Assert.AreEqual (Environment.CurrentDirectory, Path.GetFullPath ("."), "#03");
  			Assert.AreEqual (Path.Combine (Environment.CurrentDirectory, "hey"),
  					     Path.GetFullPath ("hey"), "#04");
  			Assert.AreEqual ("/", Path.GetFullPath ("/"), "#01");
  
  			string curdir = Directory.GetCurrentDirectory ();
  			try {
  				Directory.SetCurrentDirectory ("/");
  				Assert.AreEqual ("/test.txt", Path.GetFullPath ("test.txt"), "xambug #833");
  			}
  			finally {
  				Directory.SetCurrentDirectory (curdir);
  			}
  		}
  
  		[Test]
  		public void GetFullPath_Windows ()
  		{
  			if (!Windows)
  				Assert.Ignore ("Not running on Windows.");
  
  			string root =  "C:\\";
  			string [,] test = new string [,] {
  				{"root////././././././../root/././../root", "root"},
  				{"root/", "root\\"},
  				{"root/./", "root\\"},
  				{"root/./", "root\\"},
  				{"root/../", ""},
  				{"root/../", ""},
  				{"root/../..", ""},
  				{"root/.hiddenfile", "root\\.hiddenfile"},
  				{"root/. /", "root\\"},
  				{"root/.. /", ""},
  				{"root/..weirdname", "root\\..weirdname"},
  				{"root/..", ""},
  				{"root/../a/b/../../..", ""},
  				{"root/./..", ""},
  				{"..", ""},
  				{".", ""},
  				{"root//dir", "root\\dir"},
  				{"root/.              /", "root\\"},
  				{"root/..             /", ""},
  				{"root/./", "root\\"},
  				{"root/..                      /", ""},
  				{".//", ""}
  			};
  
  			for (int i = 0; i < test.GetUpperBound (0); i++) {
  				try {
  					Assert.AreEqual (root + test [i, 1], Path.GetFullPath (root + test [i, 0]),
  							 String.Format ("GetFullPathWindows #{0}", i));
  				} catch (Exception ex) { 
  					Assert.Fail (String.Format ("GetFullPathWindows #{0} (\"{1}\") failed: {2}", 
  						i, root + test [i, 0], ex.GetType ()));
  				}
  			}
  
  			// UNC tests
  			string root2 = @"\\server\share";
  			root = @"\\server\share\";
  			test = new string [,] {		
  				{"root////././././././../root/././../root", "root"},
  				{"root/", "root\\"},
  				{"root/./", "root\\"},
  				{"root/./", "root\\"},
  				{"root/../", ""},
  				{"root/../", ""},
  				{"root/../..", null},
  				{"root/.hiddenfile", "root\\.hiddenfile"},
  				{"root/. /", "root\\"},
  				{"root/.. /", ""},
  				{"root/..weirdname", "root\\..weirdname"},
  				{"root/..", null},
  				{"root/../a/b/../../..", null},
  				{"root/./..", null},
  				{"..", null},
  				{".", null},
  				{"root//dir", "root\\dir"},
  				{"root/.              /", "root\\"},
  				{"root/..             /", ""},
  				{"root/./", "root\\"},
  				{"root/..                      /", ""},
  				{".//", ""}
  			};
  
  			for (int i = 0; i < test.GetUpperBound (0); i++) {
  				// "null" means we have to compare against "root2"
  				string res = test [i, 1] != null
  					? root + test [i, 1]
  					: root2;
  				try {
  					Assert.AreEqual (res, Path.GetFullPath (root + test [i, 0]),
  							 String.Format ("GetFullPathWindows UNC #{0}", i));
  				} catch (AssertionException) {
  					throw;
  				} catch (Exception ex) {
  					Assert.Fail (String.Format ("GetFullPathWindows UNC #{0} (\"{1}\") failed: {2}",
  						i, root + test [i, 0], ex.GetType ()));
  				}
  			}
  
  			test = new string [,] {		
  				{"root////././././././../root/././../root", "root"},
  				{"root/", "root\\"},
  				{"root/./", "root\\"},
  				{"root/./", "root\\"},
  				{"root/../", ""},
  				{"root/../", ""},
  				{"root/../..", null},
  				{"root/.hiddenfile", "root\\.hiddenfile"},
  				{"root/. /", "root\\"},
  				{"root/.. /", ""},
  				{"root/..weirdname", "root\\..weirdname"},
  				{"root/..", null},
  				{"root/../a/b/../../..", null},
  				{"root/./..", null},
  				{"..", null},
  				{".", null},
  				{"root//dir", "root\\dir"},
  				{"root/.              /", "root\\"},
  				{"root/..             /", ""},
  				{"root/./", "root\\"},
  				{"root/..                      /", ""},
  				{".//", ""}
  			};
  
  			string root3 = @"//server/share";
  			root = @"//server/share/";
  			bool needSlashConvert = Path.DirectorySeparatorChar != '/';
  
  			for (int i = 0; i < test.GetUpperBound (0); i++) {
  				// "null" means we have to compare against "root2"
  				string res = test [i, 1] != null
  					? root + test [i, 1]
  					: root3;
  				if (needSlashConvert)
  					res = res.Replace ('/', Path.DirectorySeparatorChar);
  				try {
  					Assert.AreEqual (res, Path.GetFullPath (root + test [i, 0]),
  							 String.Format ("GetFullPathWindows UNC[2] #{0}", i));
  				} catch (AssertionException) {
  					throw;
  				} catch (Exception ex) {
  					Assert.Fail (String.Format ("GetFullPathWindows UNC[2] #{0} (\"{1}\") failed: {2}",
  						i, root + test [i, 0], ex.GetType ()));
  				}
  			}
  		}
  
  		[Test]
  		public void GetFullPath_Path_Empty ()
  		{
  			try {
  				Path.GetFullPath (String.Empty);
  				Assert.Fail ("#1");
  			} catch (ArgumentException ex) {
  				// The path is not of a legal form
  				Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#2");
  				Assert.IsNull (ex.InnerException, "#3");
  				Assert.IsNotNull (ex.Message, "#4");
  				Assert.IsNull (ex.ParamName, "#5");
  			}
  		}
  
  		[Test]
  		public void GetFullPath_Path_EndingSeparator ()
  		{
  			string fp = Path.GetFullPath ("something/");
  			char end = fp [fp.Length - 1];
  			Assert.IsTrue (end == Path.DirectorySeparatorChar);
  		}
  
  		[Test]
  		public void GetFullPath_Path_InvalidPathChars ()
  		{
  			try {
  				Path.GetFullPath ("hi\0world");
  				Assert.Fail ("#1");
  			} catch (ArgumentException ex) {
  				// Illegal characters in path
  				Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#2");
  				Assert.IsNull (ex.InnerException, "#3");
  				Assert.IsNotNull (ex.Message, "#4");
  				Assert.IsNull (ex.ParamName, "#5");
  			}
  		}
  
  		[Test]
  		public void GetFullPath_Path_Null ()
  		{
  			try {
  				Path.GetFullPath (null);
  				Assert.Fail ("#1");
  			} catch (ArgumentNullException ex) {
  				Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");
  				Assert.IsNull (ex.InnerException, "#3");
  				Assert.IsNotNull (ex.Message, "#4");
  				Assert.AreEqual ("path", ex.ParamName, "#5");
  			}
  		}
  
  		[Test]
  		public void GetFullPath_Path_Whitespace ()
  		{
  			try {
  				Path.GetFullPath ("  ");
  				Assert.Fail ("#1");
  			} catch (ArgumentException ex) {
  				// The path is not of a legal form
  				Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#2");
  				Assert.IsNull (ex.InnerException, "#3");
  				Assert.IsNotNull (ex.Message, "#4");
  				Assert.IsNull (ex.ParamName, "#5");
  			}
  		}
  
  		[Test]
  		public void GetFullPath2 ()
  		{
  			if (Windows) {
  				Assert.AreEqual (@"Z:\", Path.GetFullPath ("Z:"), "GetFullPath w#01");
  				Assert.AreEqual (@"c:\abc\def", Path.GetFullPath (@"c:\abc\def"), "GetFullPath w#02");
  				Assert.IsTrue (Path.GetFullPath (@"\").EndsWith (@"\"), "GetFullPath w#03");
  				// "\\\\" is not allowed
  				Assert.IsTrue (Path.GetFullPath ("/").EndsWith (@"\"), "GetFullPath w#05");
  				// "//" is not allowed
  				Assert.IsTrue (Path.GetFullPath ("readme.txt").EndsWith (@"\readme.txt"), "GetFullPath w#07");
  				Assert.IsTrue (Path.GetFullPath ("c").EndsWith (@"\c"), "GetFullPath w#08");
  				Assert.IsTrue (Path.GetFullPath (@"abc\def").EndsWith (@"abc\def"), "GetFullPath w#09");
  				Assert.IsTrue (Path.GetFullPath (@"\abc\def").EndsWith (@"\abc\def"), "GetFullPath w#10");
  				Assert.AreEqual (@"\\abc\def", Path.GetFullPath (@"\\abc\def"), "GetFullPath w#11");
  				Assert.AreEqual (Directory.GetCurrentDirectory () + @"\abc\def", Path.GetFullPath (@"abc//def"), "GetFullPath w#12");
  				Assert.AreEqual (Directory.GetCurrentDirectory ().Substring (0, 2) + @"\abc\def", Path.GetFullPath ("/abc/def"), "GetFullPath w#13");
  				Assert.AreEqual (@"\\abc\def", Path.GetFullPath ("//abc/def"), "GetFullPath w#14");
  			} else {
  				Assert.AreEqual ("/", Path.GetFullPath ("/"), "#01");
  				Assert.AreEqual ("/hey", Path.GetFullPath ("/hey"), "#02");
  				Assert.AreEqual (Environment.CurrentDirectory, Path.GetFullPath ("."), "#03");
  				Assert.AreEqual (Path.Combine (Environment.CurrentDirectory, "hey"),
  						     Path.GetFullPath ("hey"), "#04");
  			}
  		}
  
  		[Test]
  		public void GetPathRoot ()
  		{
  			string current;
  			string expected;
  			if (!Windows){
  				current = Directory.GetCurrentDirectory ();
  				expected = current [0].ToString ();
  			} else {
  				current = @"J:\Some\Strange Directory\Name";
  				expected = "J:\\";
  			}
  
  			string pathRoot = Path.GetPathRoot (current);
  			Assert.AreEqual (expected, pathRoot, "GetPathRoot #01");
  		}
  
  		[Test]
  		public void GetPathRoot2 ()
  		{
  			// note: this method doesn't call Directory.GetCurrentDirectory so it can be
  			// reused for partial trust unit tests in PathCas.cs
  
  			string pathRoot;
  			
  			pathRoot = Path.GetPathRoot ("hola");
  			Assert.AreEqual (String.Empty, pathRoot, "#A1");
  			pathRoot = Path.GetPathRoot (null);
  			Assert.AreEqual (null, pathRoot, "#A2");
  
  			if (Windows) {
  				Assert.AreEqual ("z:", Path.GetPathRoot ("z:"), "GetPathRoot w#01");
  				Assert.AreEqual ("c:\\", Path.GetPathRoot ("c:\\abc\\def"), "GetPathRoot w#02");
  				Assert.AreEqual ("\\", Path.GetPathRoot ("\\"), "GetPathRoot w#03");
  				Assert.AreEqual ("\\\\", Path.GetPathRoot ("\\\\"), "GetPathRoot w#04");
  				Assert.AreEqual ("\\", Path.GetPathRoot ("/"), "GetPathRoot w#05");
  				Assert.AreEqual ("\\\\", Path.GetPathRoot ("//"), "GetPathRoot w#06");
  				Assert.AreEqual (String.Empty, Path.GetPathRoot ("readme.txt"), "GetPathRoot w#07");
  				Assert.AreEqual (String.Empty, Path.GetPathRoot ("c"), "GetPathRoot w#08");
  				Assert.AreEqual (String.Empty, Path.GetPathRoot ("abc\\def"), "GetPathRoot w#09");
  				Assert.AreEqual ("\\", Path.GetPathRoot ("\\abc\\def"), "GetPathRoot w#10");
  				Assert.AreEqual ("\\\\abc\\def", Path.GetPathRoot ("\\\\abc\\def"), "GetPathRoot w#11");
  				Assert.AreEqual (String.Empty, Path.GetPathRoot ("abc//def"), "GetPathRoot w#12");
  				Assert.AreEqual ("\\", Path.GetPathRoot ("/abc/def"), "GetPathRoot w#13");
  				Assert.AreEqual ("\\\\abc\\def", Path.GetPathRoot ("//abc/def"), "GetPathRoot w#14");
  				Assert.AreEqual (@"C:\", Path.GetPathRoot (@"C:\"), "GetPathRoot w#15");
  				Assert.AreEqual (@"C:\", Path.GetPathRoot (@"C:\\"), "GetPathRoot w#16");
  				Assert.AreEqual ("\\\\abc\\def", Path.GetPathRoot ("\\\\abc\\def\\ghi"), "GetPathRoot w#17");
  			} else {
  				// TODO: Same tests for Unix.
  			}
  		}
  
  		[Test]
  		public void GetPathRoot_Path_Empty ()
  		{
  			try {
  				Path.GetPathRoot (String.Empty);
  				Assert.Fail ("#1");
  			} catch (ArgumentException ex) {
  				// The path is not of a legal form
  				Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#2");
  				Assert.IsNull (ex.InnerException, "#3");
  				Assert.IsNotNull (ex.Message, "#4");
  				Assert.IsNull (ex.ParamName, "#5");
  			}
  		}
  
  		[Test]
  		public void GetPathRoot_Path_InvalidPathChars ()
  		{
  			try {
  				Path.GetPathRoot ("hi\0world");
  				Assert.Fail ("#1");
  			} catch (ArgumentException ex) {
  				// Illegal characters in path
  				Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#2");
  				Assert.IsNull (ex.InnerException, "#3");
  				Assert.IsNotNull (ex.Message, "#4");
  				Assert.IsNull (ex.ParamName, "#5");
  			}
  		}
  
  		[Test]
  		public void GetPathRoot_Path_Whitespace ()
  		{
  			try {
  				Path.GetPathRoot ("  ");
  				Assert.Fail ("#1");
  			} catch (ArgumentException ex) {
  				// The path is not of a legal form
  				Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#2");
  				Assert.IsNull (ex.InnerException, "#3");
  				Assert.IsNotNull (ex.Message, "#4");
  				Assert.IsNull (ex.ParamName, "#5");
  			}
  		}
  
  		[Test]
  		public void GetTempPath ()
  		{
  			string getTempPath = Path.GetTempPath ();
  			Assert.IsTrue (getTempPath != String.Empty, "GetTempPath #01");
  			Assert.IsTrue (Path.IsPathRooted (getTempPath), "GetTempPath #02");
  			Assert.AreEqual (Path.DirectorySeparatorChar, getTempPath [getTempPath.Length - 1], "GetTempPath #03");
  		}
  
  		[Test]
  		public void GetTempFileName ()
  		{
  			string getTempFileName = null;
  			try {
  				getTempFileName = Path.GetTempFileName ();
  				Assert.IsTrue (getTempFileName != String.Empty, "GetTempFileName #01");
  				Assert.IsTrue (File.Exists (getTempFileName), "GetTempFileName #02");
  			} finally {
  				if (getTempFileName != null && getTempFileName != String.Empty){
  					File.Delete (getTempFileName);
  				}
  			}
  		}
  
  		[Test]
  		public void HasExtension ()
  		{
  			Assert.AreEqual (true, Path.HasExtension ("foo.txt"), "HasExtension #01");
  			Assert.AreEqual (false, Path.HasExtension ("foo"), "HasExtension #02");
  			Assert.AreEqual (true, Path.HasExtension (path1), "HasExtension #03");
  			Assert.AreEqual (false, Path.HasExtension (path2), "HasExtension #04");
  			Assert.AreEqual (false, Path.HasExtension (null), "HasExtension #05");
  			Assert.AreEqual (false, Path.HasExtension (String.Empty), "HasExtension #06");
  			Assert.AreEqual (false, Path.HasExtension (" "), "HasExtension #07");
  			Assert.AreEqual (false, Path.HasExtension ("."), "HasExtension #08");
  			Assert.AreEqual (false, Path.HasExtension ("end."), "HasExtension #09");
  			Assert.AreEqual (true, Path.HasExtension (".start"), "HasExtension #10");
  			Assert.AreEqual (true, Path.HasExtension (".a"), "HasExtension #11");
  			Assert.AreEqual (false, Path.HasExtension ("a."), "HasExtension #12");
  			Assert.AreEqual (false, Path.HasExtension ("Makefile"), "HasExtension #13");
  		}
  
  		[Test]
  		public void HasExtension_Path_InvalidPathChars ()
  		{
  			try {
  				Path.HasExtension ("hi\0world.txt");
  				Assert.Fail ("#1");
  			} catch (ArgumentException ex) {
  				// Illegal characters in path
  				Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#2");
  				Assert.IsNull (ex.InnerException, "#3");
  				Assert.IsNotNull (ex.Message, "#4");
  				Assert.IsNull (ex.ParamName, "#5");
  			}
  		}
  
  		[Test]
  		public void IsPathRooted ()
  		{
  			Assert.IsTrue (Path.IsPathRooted (path2), "IsPathRooted #01");
  			Assert.IsTrue (!Path.IsPathRooted (path3), "IsPathRooted #02");
  			Assert.IsTrue (!Path.IsPathRooted (null), "IsPathRooted #03");
  			Assert.IsTrue (!Path.IsPathRooted (String.Empty), "IsPathRooted #04");
  			Assert.IsTrue (!Path.IsPathRooted (" "), "IsPathRooted #05");
  			Assert.IsTrue (Path.IsPathRooted ("/"), "IsPathRooted #06");
  			Assert.IsTrue (Path.IsPathRooted ("//"), "IsPathRooted #07");
  			Assert.IsTrue (!Path.IsPathRooted (":"), "IsPathRooted #08");
  
  			if (Windows) {
  				Assert.IsTrue (Path.IsPathRooted ("\\"), "IsPathRooted #09");
  				Assert.IsTrue (Path.IsPathRooted ("\\\\"), "IsPathRooted #10");
  				Assert.IsTrue (Path.IsPathRooted ("z:"), "IsPathRooted #11");
  				Assert.IsTrue (Path.IsPathRooted ("z:\\"), "IsPathRooted #12");
  				Assert.IsTrue (Path.IsPathRooted ("z:\\topdir"), "IsPathRooted #13");
  				// This looks MS BUG. It is treated as absolute path
  				Assert.IsTrue (Path.IsPathRooted ("z:curdir"), "IsPathRooted #14");
  				Assert.IsTrue (Path.IsPathRooted ("\\abc\\def"), "IsPathRooted #15");
  			} else {
  				if (Environment.GetEnvironmentVariable ("MONO_IOMAP") == "all"){
  					Assert.IsTrue (Path.IsPathRooted ("\\"), "IsPathRooted #16");
  					Assert.IsTrue (Path.IsPathRooted ("\\\\"), "IsPathRooted #17");
  				} else {
  					Assert.IsTrue (!Path.IsPathRooted ("\\"), "IsPathRooted #09");
  					Assert.IsTrue (!Path.IsPathRooted ("\\\\"), "IsPathRooted #10");
  					Assert.IsTrue (!Path.IsPathRooted ("z:"), "IsPathRooted #11");
  				}
  			}
  		}
  
  		[Test]
  		public void IsPathRooted_Path_Empty ()
  		{
  			Assert.IsTrue (!Path.IsPathRooted (String.Empty));
  		}
  
  		[Test]
  		public void IsPathRooted_Path_InvalidPathChars ()
  		{
  			try {
  				Path.IsPathRooted ("hi\0world");
  				Assert.Fail ("#1");
  			} catch (ArgumentException ex) {
  				// Illegal characters in path.
  				Assert.AreEqual (typeof (ArgumentException), ex.GetType (), "#2");
  				Assert.IsNull (ex.InnerException, "#3");
  				Assert.IsNotNull (ex.Message, "#4");
  				Assert.IsNull (ex.ParamName, "#5");
  			}
  		}
  
  		[Test]
  		public void IsPathRooted_Path_Null ()
  		{
  			Assert.IsTrue (!Path.IsPathRooted (null));
  		}
  
  		[Test]
  		public void IsPathRooted_Path_Whitespace ()
  		{
  			Assert.IsTrue (!Path.IsPathRooted ("  "));
  		}
  
  		[Test]
  		public void CanonicalizeDots ()
  		{
  			string current = Path.GetFullPath (".");
  			Assert.IsTrue (!current.EndsWith ("."), "TestCanonicalizeDotst #01");
  			string parent = Path.GetFullPath ("..");
  			Assert.IsTrue (!current.EndsWith (".."), "TestCanonicalizeDotst #02");
  		}
  #if !MOBILE
  		[Test]
  		public void WindowsSystem32_76191 ()
  		{
  			// check for Unix platforms - see FAQ for more details
  			// http://www.mono-project.com/FAQ:_Technical#How_to_detect_the_execution_platform_.3F
  			int platform = (int) Environment.OSVersion.Platform;
  			if ((platform == 4) || (platform == 128) || (platform == 6))
  				Assert.Ignore ("Running on Unix.");
  
  			string curdir = Directory.GetCurrentDirectory ();
  			try {
  				string system = Environment.SystemDirectory;
  				Directory.SetCurrentDirectory (system);
  				string drive = system.Substring (0, 2);
  				Assert.AreEqual (system, Path.GetFullPath (drive), "current dir");
  			}
  			finally {
  				Directory.SetCurrentDirectory (curdir);
  			}
  		}
  
  		[Test]
  		public void WindowsSystem32_77007 ()
  		{
  			// check for Unix platforms - see FAQ for more details
  			// http://www.mono-project.com/FAQ:_Technical#How_to_detect_the_execution_platform_.3F
  			int platform = (int) Environment.OSVersion.Platform;
  			if ((platform == 4) || (platform == 128) || (platform == 6))
  				Assert.Ignore ("Running on Unix.");
  
  			string curdir = Directory.GetCurrentDirectory ();
  			try {
  				string system = Environment.SystemDirectory;
  				Directory.SetCurrentDirectory (system);
  				// e.g. C:dir (no backslash) will return CurrentDirectory + dir
  				string dir = system.Substring (0, 2) + "dir";
  				Assert.AreEqual (Path.Combine (system, "dir"), Path.GetFullPath (dir), "current dir");
  			}
  			finally {
  				Directory.SetCurrentDirectory (curdir);
  			}
  		}
  #endif
  		[Test]
  		public void WindowsDriveC14N_77058 ()
  		{
  			// check for Unix platforms - see FAQ for more details
  			// http://www.mono-project.com/FAQ:_Technical#How_to_detect_the_execution_platform_.3F
  			int platform = (int) Environment.OSVersion.Platform;
  			if ((platform == 4) || (platform == 128) || (platform == 6))
  				Assert.Ignore ("Running on Unix.");
  
  			Assert.AreEqual (@"C:\Windows\dir", Path.GetFullPath (@"C:\Windows\System32\..\dir"), "1");
  			Assert.AreEqual (@"C:\dir", Path.GetFullPath (@"C:\Windows\System32\..\..\dir"), "2");
  			Assert.AreEqual (@"C:\dir", Path.GetFullPath (@"C:\Windows\System32\..\..\..\dir"), "3");
  			Assert.AreEqual (@"C:\dir", Path.GetFullPath (@"C:\Windows\System32\..\..\..\..\dir"), "4");
  			Assert.AreEqual (@"C:\dir\", Path.GetFullPath (@"C:\Windows\System32\..\.\..\.\..\dir\"), "5");
  		}
  
  		[Test]
  		public void InvalidPathChars_Values ()
  		{
  			char[] invalid = Path.InvalidPathChars;
  			if (Windows) {
  				Assert.AreEqual (36, invalid.Length, "Length");
  
  				foreach (char c in invalid) {
  					int i = (int) c;
  
  					if (i < 32)
  						continue;
  
  					// in both 1.1 SP1 and 2.0
  					if ((i == 34) || (i == 60) || (i == 62) || (i == 124))
  						continue;
  					Assert.Fail (String.Format ("'{0}' (#{1}) is invalid", c, i));
  				}
  			} else {
  				foreach (char c in invalid) {
  					int i = (int) c;
  					if (i == 0)
  						continue;
  					Assert.Fail (String.Format ("'{0}' (#{1}) is invalid", c, i));
  				}
  			}
  		}
  
  		[Test]
  		public void InvalidPathChars_Modify ()
  		{
  			char[] expected = Path.InvalidPathChars;
  			char[] invalid = Path.InvalidPathChars;
  			char original = invalid[0];
  			try {
  				invalid[0] = 'a';
  				// kind of scary
  				Assert.IsTrue (expected[0] == 'a', "expected");
  				Assert.AreEqual (expected[0], Path.InvalidPathChars[0], "readonly");
  			} finally {
  				invalid[0] = original;
  			}
  		}
  
  		[Test]
  		public void GetInvalidFileNameChars_Values ()
  		{
  			char[] invalid = Path.GetInvalidFileNameChars ();
  			if (Windows) {
  				Assert.AreEqual (41, invalid.Length);
  				foreach (char c in invalid) {
  					int i = (int) c;
  					if (i < 32)
  						continue;
  					if ((i == 34) || (i == 60) || (i == 62) || (i == 124))
  						continue;
  					// ':', '*', '?', '\', '/'
  					if ((i == 58) || (i == 42) || (i == 63) || (i == 92) || (i == 47))
  						continue;
  					Assert.Fail (String.Format ("'{0}' (#{1}) is invalid", c, i));
  				}
  			} else {
  				foreach (char c in invalid) {
  					int i = (int) c;
  					// null or '/'
  					if ((i == 0) || (i == 47))
  						continue;
  					Assert.Fail (String.Format ("'{0}' (#{1}) is invalid", c, i));
  				}
  			}
  		}
  
  		[Test]
  		public void GetInvalidFileNameChars_Modify ()
  		{
  			char[] expected = Path.GetInvalidFileNameChars ();
  			char[] invalid = Path.GetInvalidFileNameChars ();
  			invalid[0] = 'a';
  
gt: 			Assert.IsTrue (expected[0] != 'a', "expected");