Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/class/System/Test/System.IO.Compression/ChangeLog

@@ -0,0 +1,34 @@
+2009-10-24 Gonzalo Paniagua Javier <gonzalo@novell.com>
+
+	* DeflateStreamTest.cs: test from bug #549492.
+
+2007-09-22  Gert Driesen  <drieseng@users.sourceforge.net>
+
+	* DeflateStreamTest.cs: Improved CanRead, CanSeek and CanWrite tests.
+	Added test for bug #327480. Code formatting.
+	* GzipStreamTest.cs: Improved CanRead, CanSeek and CanWrite tests.
+	Code formatting.
+
+2007-05-08  Jonathan Chambers  <joncham@gmail.com>
+
+	* DeflateStreamTest.cs, GzipStreamTest.cs : disabled tests that are
+	  hanging on my machine (and maybe buildbot). Will enable if
+	  this does not fix buildbot hang.
+
+2006-05-08  Atsushi Enomoto  <atsushi@ximian.com>
+
+	* DeflateStreamTest.cs, GzipStreamTest.cs : enabled tests that are
+	  marked as NotWorking. Closed bug #72143.
+
+2005-05-18  Sebastien Pouliot  <sebastien@ximian.com>
+
+	* DeflateStreamCas.cs: New. CAS unit tests to test stack propagation 
+	for BeginRead and BeginWrite.
+	* DeflateStreamTest.cs: Added tests for constructor. Fixed tests to 
+	execute without error with 2.0 beta2. Removed "NotWorking" for some 
+	(fixed) tests.
+	* GZipStreamCas.cs: New. CAS unit tests to test stack propagation 
+	for BeginRead and BeginWrite.
+	* GzipStreamTest.cs: Renamed class to GZipStream. : Added tests for 
+	constructor. Fixed tests to execute without error with 2.0 beta2. 
+	Removed "NotWorking" for some (fixed) tests.

mcs/class/System/Test/System.IO.Compression/DeflateStreamCas.cs

@@ -0,0 +1,142 @@
+//
+// DeflateStreamCas.cs -CAS unit tests for System.IO.Compression.DeflateStream
+//
+// Author:
+//	Sebastien Pouliot  <sebastien@ximian.com>
+//
+// Copyright (C) 2005 Novell, Inc (http://www.novell.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+// 
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+#if NET_2_0
+
+using NUnit.Framework;
+
+using System;
+using System.IO;
+using System.IO.Compression;
+using System.Security;
+using System.Security.Permissions;
+using System.Threading;
+
+namespace MonoCasTests.System.IO.Compression {
+
+	[TestFixture]
+	[Category ("CAS")]
+	public class DeflateStreamCas {
+
+		private const int timeout = 30000;
+		private string message;
+
+		static ManualResetEvent reset;
+
+		[TestFixtureSetUp]
+		public void FixtureSetUp ()
+		{
+			// this occurs with a "clean" stack (full trust)
+			reset = new ManualResetEvent (false);
+		}
+
+		[TestFixtureTearDown]
+		public void FixtureTearDown ()
+		{
+			reset.Close ();
+		}
+
+		[SetUp]
+		public void SetUp ()
+		{
+			if (!SecurityManager.SecurityEnabled)
+				Assert.Ignore ("SecurityManager.SecurityEnabled is OFF");
+		}
+
+		// async tests (for stack propagation)
+
+		private void ReadCallback (IAsyncResult ar)
+		{
+			DeflateStream s = (DeflateStream)ar.AsyncState;
+			s.EndRead (ar);
+			try {
+				// can we do something bad here ?
+				Assert.IsNotNull (Environment.GetEnvironmentVariable ("USERNAME"));
+				message = "Expected a SecurityException";
+			}
+			catch (SecurityException) {
+				message = null;
+				reset.Set ();
+			}
+			catch (Exception e) {
+				message = e.ToString ();
+			}
+		}
+
+		[Test]
+		[EnvironmentPermission (SecurityAction.Deny, Read = "USERNAME")]
+		public void AsyncRead ()
+		{
+			DeflateStream cs = new DeflateStream (new MemoryStream (), CompressionMode.Decompress);
+			message = "AsyncRead";
+			reset.Reset ();
+			IAsyncResult r = cs.BeginRead (new byte[0], 0, 0, new AsyncCallback (ReadCallback), cs);
+			Assert.IsNotNull (r, "IAsyncResult");
+			if (!reset.WaitOne (timeout, true))
+				Assert.Ignore ("Timeout");
+			Assert.IsNull (message, message);
+			cs.Close ();
+		}
+
+		private void WriteCallback (IAsyncResult ar)
+		{
+			DeflateStream s = (DeflateStream)ar.AsyncState;
+			s.EndWrite (ar);
+			try {
+				// can we do something bad here ?
+				Assert.IsNotNull (Environment.GetEnvironmentVariable ("USERNAME"));
+				message = "Expected a SecurityException";
+			}
+			catch (SecurityException) {
+				message = null;
+				reset.Set ();
+			}
+			catch (Exception e) {
+				message = e.ToString ();
+			}
+		}
+
+		[Test]
+		[EnvironmentPermission (SecurityAction.Deny, Read = "USERNAME")]
+		public void AsyncWrite ()
+		{
+			DeflateStream cs = new DeflateStream (new MemoryStream (), CompressionMode.Compress);
+			message = "AsyncWrite";
+			reset.Reset ();
+			IAsyncResult r = cs.BeginWrite (new byte[1], 0, 1, new AsyncCallback (WriteCallback), cs);
+			Assert.IsNotNull (r, "IAsyncResult");
+			if (!reset.WaitOne (timeout, true))
+				Assert.Ignore ("Timeout");
+			Assert.IsNull (message, message);
+// the Close is currently buggy in Mono
+//			cs.Close ();
+		}
+	}
+}
+
+#endif

mcs/class/System/Test/System.IO.Compression/DeflateStreamTest.cs

@@ -0,0 +1,304 @@
+/* -*- Mode: csharp; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+//
+// DeflateStreamTest.cs - NUnit Test Cases for the System.IO.Compression.DeflateStream class
+//
+// Authors:
+// 	Christopher James Lahey  <clahey@ximian.com>
+//
+// (C) 2004 Novell, Inc. <http://www.novell.com>
+// 
+
+#if NET_2_0
+
+using NUnit.Framework;
+using System;
+using System.IO;
+using System.IO.Compression;
+
+namespace MonoTests.System.IO.Compression
+{
+	[TestFixture]
+	public class DeflateStreamTest
+	{
+		private static void CopyStream (Stream src, Stream dest)
+		{
+			byte[] array = new byte[1024];
+			int bytes_read;
+			bytes_read = src.Read (array, 0, 1024);
+			while (bytes_read != 0) {
+				dest.Write (array, 0, bytes_read);
+				bytes_read = src.Read (array, 0, 1024);
+			}
+		}
+
+		private static bool compare_buffers (byte[] first, byte[] second, int length)
+		{
+			if (first.Length < length || second.Length < length) {
+				return false;
+			}
+			for (int i = 0; i < length; i++) {
+				if (first[i] != second[i]) {
+					return false;
+				}
+			}
+			return true;
+		}
+
+		[Test]
+		[ExpectedException (typeof (ArgumentNullException))]
+		public void Constructor_Null ()
+		{
+			DeflateStream ds = new DeflateStream (null, CompressionMode.Compress);
+		}
+
+		[Test]
+		[ExpectedException (typeof (ArgumentException))]
+		public void Constructor_InvalidCompressionMode ()
+		{
+			DeflateStream ds = new DeflateStream (new MemoryStream (), (CompressionMode)Int32.MinValue);
+		}
+
+		[Test]
+		public void CheckCompressDecompress ()
+		{
+			byte [] data = new byte[100000];
+			for (int i = 0; i < 100000; i++) {
+				data[i] = (byte) i;
+			}
+			MemoryStream dataStream = new MemoryStream (data);
+			MemoryStream backing = new MemoryStream ();
+			DeflateStream compressing = new DeflateStream (backing, CompressionMode.Compress, true);
+			CopyStream (dataStream, compressing);
+			dataStream.Close();
+			compressing.Close();
+			backing.Seek (0, SeekOrigin.Begin);
+			DeflateStream decompressing = new DeflateStream (backing, CompressionMode.Decompress);
+			MemoryStream output = new MemoryStream ();
+			CopyStream (decompressing, output);
+			Assert.IsTrue (compare_buffers (data, output.GetBuffer(), (int) output.Length));
+			decompressing.Close();
+			output.Close();
+		}
+
+		[Test]
+		public void CheckDecompress ()
+		{
+			MemoryStream backing = new MemoryStream (compressed_data);
+			DeflateStream decompressing = new DeflateStream (backing, CompressionMode.Decompress);
+			StreamReader reader = new StreamReader (decompressing);
+			Assert.AreEqual ("Hello", reader.ReadLine ());
+			decompressing.Close();
+		}
+
+		[Test]
+		[ExpectedException (typeof (ArgumentNullException))]
+		public void CheckNullRead ()
+		{
+			MemoryStream backing = new MemoryStream (compressed_data);
+			DeflateStream decompressing = new DeflateStream (backing, CompressionMode.Decompress);
+			decompressing.Read (null, 0, 20);
+		}
+
+		[Test]
+		[ExpectedException (typeof (InvalidOperationException))]
+		public void CheckCompressingRead ()
+		{
+			byte [] dummy = new byte[20];
+			MemoryStream backing = new MemoryStream ();
+			DeflateStream compressing = new DeflateStream (backing, CompressionMode.Compress);
+			compressing.Read (dummy, 0, 20);
+		}
+
+		[Test]
+		[ExpectedException (typeof (ArgumentException))]
+		public void CheckRangeRead ()
+		{
+			byte [] dummy = new byte[20];
+			MemoryStream backing = new MemoryStream (compressed_data);
+			DeflateStream decompressing = new DeflateStream (backing, CompressionMode.Decompress);
+			decompressing.Read (dummy, 10, 20);
+		}
+
+#if !MOBILE
+		[Test]
+		[Category("NotWorking")]
+		[ExpectedException (typeof (InvalidDataException))]
+		public void CheckInvalidDataRead ()
+		{
+			byte [] data = {0x11, 0x78, 0x89, 0x91, 0xbe, 0xf3, 0x48, 0xcd, 0xc9, 0xc9, 0xe7, 0x02, 0x00 };
+			byte [] dummy = new byte[20];
+			MemoryStream backing = new MemoryStream (data);
+			DeflateStream decompressing = new DeflateStream (backing, CompressionMode.Decompress);
+			decompressing.Read (dummy, 0, 20);
+		}
+#endif
+
+		[Test]
+		[ExpectedException (typeof (ObjectDisposedException))]
+		public void CheckClosedRead ()
+		{
+			byte [] dummy = new byte[20];
+			MemoryStream backing = new MemoryStream (compressed_data);
+			DeflateStream decompressing = new DeflateStream (backing, CompressionMode.Decompress);
+			decompressing.Close ();
+			decompressing.Read (dummy, 0, 20);
+		}
+
+		[Test]
+		[ExpectedException (typeof (ObjectDisposedException))]
+		public void CheckClosedFlush ()
+		{
+			MemoryStream backing = new MemoryStream ();
+			DeflateStream compressing = new DeflateStream (backing, CompressionMode.Compress);
+			compressing.Close ();
+			compressing.Flush ();
+		}
+
+		[Test]
+		[ExpectedException (typeof (NotSupportedException))]
+		public void CheckSeek ()
+		{
+			MemoryStream backing = new MemoryStream (compressed_data);
+			DeflateStream decompressing = new DeflateStream (backing, CompressionMode.Decompress);
+			decompressing.Seek (20, SeekOrigin.Current);
+		}
+
+		[Test]
+		[ExpectedException (typeof (NotSupportedException))]
+		public void CheckSetLength ()
+		{
+			MemoryStream backing = new MemoryStream (compressed_data);
+			DeflateStream decompressing = new DeflateStream (backing, CompressionMode.Decompress);
+			decompressing.SetLength (20);
+		}
+
+		[Test]
+		public void CheckGetCanSeekProp ()
+		{
+			MemoryStream backing = new MemoryStream (compressed_data);
+			DeflateStream decompress = new DeflateStream (backing, CompressionMode.Decompress);
+			Assert.IsFalse (decompress.CanSeek, "#A1");
+			Assert.IsTrue (backing.CanSeek, "#A2");
+			decompress.Dispose ();
+			Assert.IsFalse (decompress.CanSeek, "#A3");
+			Assert.IsFalse (backing.CanSeek, "#A4");
+
+			backing = new MemoryStream ();
+			DeflateStream compress = new DeflateStream (backing, CompressionMode.Compress);
+			Assert.IsFalse (compress.CanSeek, "#B1");
+			Assert.IsTrue (backing.CanSeek, "#B2");
+			compress.Dispose ();
+			Assert.IsFalse (decompress.CanSeek, "#B3");
+			Assert.IsFalse (backing.CanSeek, "#B4");
+		}
+
+		[Test]
+		public void CheckGetCanReadProp ()
+		{
+			MemoryStream backing = new MemoryStream (compressed_data);
+			DeflateStream decompress = new DeflateStream (backing, CompressionMode.Decompress);
+			Assert.IsTrue (decompress.CanRead, "#A1");
+			Assert.IsTrue (backing.CanRead, "#A2");
+			decompress.Dispose ();
+			Assert.IsFalse (decompress.CanRead, "#A3");
+			Assert.IsFalse (backing.CanRead, "#A4");
+
+			backing = new MemoryStream ();
+			DeflateStream compress = new DeflateStream (backing, CompressionMode.Compress);
+			Assert.IsFalse (compress.CanRead, "#B1");
+			Assert.IsTrue (backing.CanRead, "#B2");
+			compress.Dispose ();
+			Assert.IsFalse (decompress.CanRead, "#B3");
+			Assert.IsFalse (backing.CanRead, "#B4");
+		}
+
+		[Test]
+		public void CheckGetCanWriteProp ()
+		{
+			MemoryStream backing = new MemoryStream ();
+			DeflateStream decompress = new DeflateStream (backing, CompressionMode.Decompress);
+			Assert.IsFalse (decompress.CanWrite, "#A1");
+			Assert.IsTrue (backing.CanWrite, "#A2");
+			decompress.Dispose ();
+			Assert.IsFalse (decompress.CanWrite, "#A3");
+			Assert.IsFalse (backing.CanWrite, "#A4");
+
+			backing = new MemoryStream ();
+			DeflateStream compress = new DeflateStream (backing, CompressionMode.Compress);
+			Assert.IsTrue (compress.CanWrite, "#B1");
+			Assert.IsTrue (backing.CanWrite, "#B2");
+			compress.Dispose ();
+			Assert.IsFalse (decompress.CanWrite, "#B3");
+			Assert.IsFalse (backing.CanWrite, "#B4");
+		}
+
+		[Test]
+		[ExpectedException (typeof (NotSupportedException))]
+		public void CheckSetLengthProp ()
+		{
+			MemoryStream backing = new MemoryStream (compressed_data);
+			DeflateStream decompressing = new DeflateStream (backing, CompressionMode.Decompress);
+			decompressing.SetLength (20);
+		}
+
+		[Test]
+		[ExpectedException (typeof (NotSupportedException))]
+		public void CheckGetLengthProp ()
+		{
+			MemoryStream backing = new MemoryStream (compressed_data);
+			DeflateStream decompressing = new DeflateStream (backing, CompressionMode.Decompress);
+			long length = decompressing.Length;
+		}
+
+		[Test]
+		[ExpectedException (typeof (NotSupportedException))]
+		public void CheckGetPositionProp ()
+		{
+			MemoryStream backing = new MemoryStream (compressed_data);
+			DeflateStream decompressing = new DeflateStream (backing, CompressionMode.Decompress);
+			long position = decompressing.Position;
+		}
+
+		[Test]
+		public void DisposeTest ()
+		{
+			MemoryStream backing = new MemoryStream (compressed_data);
+			DeflateStream decompress = new DeflateStream (backing, CompressionMode.Decompress);
+			decompress.Dispose ();
+			decompress.Dispose ();
+		}
+
+		static byte [] compressed_data = { 0xf3, 0x48, 0xcd, 0xc9, 0xc9,
+			0xe7, 0x02, 0x00 };
+
+
+		[Test]
+		public void JunkAtTheEnd ()
+		{
+			// Write a deflated stream, then some additional data...
+			using (MemoryStream ms = new MemoryStream())
+			{
+				// The compressed stream
+				using (DeflateStream stream = new DeflateStream(ms, CompressionMode.Compress, true))
+				{
+					stream.WriteByte(1);
+					stream.Flush();
+				}
+				// Junk
+				ms.WriteByte(2);
+
+				ms.Position = 0;
+				// Reading: this should not hang
+				using (DeflateStream stream = new DeflateStream(ms, CompressionMode.Decompress))
+				{
+					byte[] buffer  = new byte[512];
+					int len = stream.Read(buffer, 0, buffer.Length);
+					Console.WriteLine(len == 1);
+				}
+			}
+		}
+	}
+}
+
+#endif
+

mcs/class/System/Test/System.IO.Compression/GZipStreamCas.cs

@@ -0,0 +1,142 @@
+//
+// GZipStreamCas.cs -CAS unit tests for System.IO.Compression.GZipStream
+//
+// Author:
+//	Sebastien Pouliot  <sebastien@ximian.com>
+//
+// Copyright (C) 2005 Novell, Inc (http://www.novell.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+// 
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+#if NET_2_0
+
+using NUnit.Framework;
+
+using System;
+using System.IO;
+using System.IO.Compression;
+using System.Security;
+using System.Security.Permissions;
+using System.Threading;
+
+namespace MonoCasTests.System.IO.Compression {
+
+	[TestFixture]
+	[Category ("CAS")]
+	public class GZipStreamCas {
+
+		private const int timeout = 30000;
+		private string message;
+
+		static ManualResetEvent reset;
+
+		[TestFixtureSetUp]
+		public void FixtureSetUp ()
+		{
+			// this occurs with a "clean" stack (full trust)
+			reset = new ManualResetEvent (false);
+		}
+
+		[TestFixtureTearDown]
+		public void FixtureTearDown ()
+		{
+			reset.Close ();
+		}
+
+		[SetUp]
+		public void SetUp ()
+		{
+			if (!SecurityManager.SecurityEnabled)
+				Assert.Ignore ("SecurityManager.SecurityEnabled is OFF");
+		}
+
+		// async tests (for stack propagation)
+
+		private void ReadCallback (IAsyncResult ar)
+		{
+			GZipStream s = (GZipStream)ar.AsyncState;
+			s.EndRead (ar);
+			try {
+				// can we do something bad here ?
+				Assert.IsNotNull (Environment.GetEnvironmentVariable ("USERNAME"));
+				message = "Expected a SecurityException";
+			}
+			catch (SecurityException) {
+				message = null;
+				reset.Set ();
+			}
+			catch (Exception e) {
+				message = e.ToString ();
+			}
+		}
+
+		[Test]
+		[EnvironmentPermission (SecurityAction.Deny, Read = "USERNAME")]
+		public void AsyncRead ()
+		{
+			GZipStream cs = new GZipStream (new MemoryStream (), CompressionMode.Decompress);
+			message = "AsyncRead";
+			reset.Reset ();
+			IAsyncResult r = cs.BeginRead (new byte[0], 0, 0, new AsyncCallback (ReadCallback), cs);
+			Assert.IsNotNull (r, "IAsyncResult");
+			if (!reset.WaitOne (timeout, true))
+				Assert.Ignore ("Timeout");
+			Assert.IsNull (message, message);
+			cs.Close ();
+		}
+
+		private void WriteCallback (IAsyncResult ar)
+		{
+			GZipStream s = (GZipStream)ar.AsyncState;
+			s.EndWrite (ar);
+			try {
+				// can we do something bad here ?
+				Assert.IsNotNull (Environment.GetEnvironmentVariable ("USERNAME"));
+				message = "Expected a SecurityException";
+			}
+			catch (SecurityException) {
+				message = null;
+				reset.Set ();
+			}
+			catch (Exception e) {
+				message = e.ToString ();
+			}
+		}
+
+		[Test]
+		[EnvironmentPermission (SecurityAction.Deny, Read = "USERNAME")]
+		public void AsyncWrite ()
+		{
+			GZipStream cs = new GZipStream (new MemoryStream (), CompressionMode.Compress);
+			message = "AsyncWrite";
+			reset.Reset ();
+			IAsyncResult r = cs.BeginWrite (new byte[0], 0, 0, new AsyncCallback (WriteCallback), cs);
+			Assert.IsNotNull (r, "IAsyncResult");
+			if (!reset.WaitOne (timeout, true))
+				Assert.Ignore ("Timeout");
+			Assert.IsNull (message, message);
+// the Close is currently buggy in Mono
+//			cs.Close ();
+		}
+	}
+}
+
+#endif

mcs/class/System/Test/System.IO.Compression/GzipStreamTest.cs

@@ -0,0 +1,301 @@
+/* -*- Mode: csharp; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+//
+// GZipStreamTest.cs - NUnit Test Cases for the System.IO.Compression.GZipStream class
+//
+// Authors:
+// 	Christopher James Lahey  <clahey@ximian.com>
+//
+// (C) 2004 Novell, Inc. <http://www.novell.com>
+// 
+
+using NUnit.Framework;
+using System;
+using System.IO;
+using System.IO.Compression;
+
+namespace MonoTests.System.IO.Compression
+{
+	[TestFixture]
+	public class GZipStreamTest
+	{
+		private static void CopyStream (Stream src, Stream dest)
+		{
+			byte[] array = new byte[1024];
+			int bytes_read;
+			bytes_read = src.Read (array, 0, 1024);
+			while (bytes_read != 0) {
+				dest.Write (array, 0, bytes_read);
+				bytes_read = src.Read (array, 0, 1024);
+			}
+		}
+
+		private static bool compare_buffers (byte[] first, byte[] second, int length)
+		{
+			if (first.Length < length || second.Length < length) {
+				return false;
+			}
+			for (int i = 0; i < length; i++) {
+				if (first[i] != second[i]) {
+					return false;
+				}
+			}
+			return true;
+		}
+
+		[Test]
+		[ExpectedException (typeof (ArgumentNullException))]
+		public void Constructor_Null ()
+		{
+			GZipStream ds = new GZipStream (null, CompressionMode.Compress);
+		}
+
+		[Test]
+		[ExpectedException (typeof (ArgumentException))]
+		public void Constructor_InvalidCompressionMode ()
+		{
+			GZipStream ds = new GZipStream (new MemoryStream (), (CompressionMode)Int32.MinValue);
+		}
+
+		[Test]
+		public void CheckCompressDecompress ()
+		{
+			byte [] data = new byte[100000];
+			for (int i = 0; i < 100000; i++) {
+				data[i] = (byte) i;
+			}
+			MemoryStream dataStream = new MemoryStream (data);
+			MemoryStream backing = new MemoryStream ();
+			GZipStream compressing = new GZipStream (backing, CompressionMode.Compress, true);
+			CopyStream (dataStream, compressing);
+			dataStream.Close();
+			compressing.Close();
+			backing.Seek (0, SeekOrigin.Begin);
+			GZipStream decompressing = new GZipStream (backing, CompressionMode.Decompress);
+			MemoryStream output = new MemoryStream ();
+			CopyStream (decompressing, output);
+			Assert.IsTrue (compare_buffers (data, output.GetBuffer(), (int) output.Length));
+			decompressing.Close();
+			output.Close();
+		}
+
+		[Test]
+		public void CheckDecompress ()
+		{
+			byte [] data = {0x1f, 0x8b, 0x08, 0x08, 0x70, 0xbb, 0x5d, 0x41, 0x00, 0x03, 0x74, 0x65, 0x73, 0x74, 0x00, 0xf3, 0x48, 0xcd, 0xc9, 0xc9, 0xe7, 0x02, 0x00, 0x16, 0x35, 0x96, 0x31, 0x06, 0x00, 0x00, 0x00 };
+			MemoryStream backing = new MemoryStream (data);
+			GZipStream decompressing = new GZipStream (backing, CompressionMode.Decompress);
+			StreamReader reader = new StreamReader (decompressing);
+			Assert.AreEqual ("Hello", reader.ReadLine ());
+			decompressing.Close();
+		}
+
+		[Test]
+		[ExpectedException (typeof (ArgumentNullException))]
+		public void CheckNullRead ()
+		{
+			byte [] data = {0x1f, 0x8b, 0x08, 0x08, 0x70, 0xbb, 0x5d, 0x41, 0x00, 0x03, 0x74, 0x65, 0x73, 0x74, 0x00, 0xf3, 0x48, 0xcd, 0xc9, 0xc9, 0xe7, 0x02, 0x00, 0x16, 0x35, 0x96, 0x31, 0x06, 0x00, 0x00, 0x00 };
+			MemoryStream backing = new MemoryStream (data);
+			GZipStream decompressing = new GZipStream (backing, CompressionMode.Decompress);
+			decompressing.Read (null, 0, 20);
+		}
+
+		[Test]
+		[ExpectedException (typeof (InvalidOperationException))]
+		public void CheckCompressingRead ()
+		{
+			byte [] dummy = new byte[20];
+			MemoryStream backing = new MemoryStream ();
+			GZipStream compressing = new GZipStream (backing, CompressionMode.Compress);
+			compressing.Read (dummy, 0, 20);
+		}
+
+		[Test]
+		[ExpectedException (typeof (ArgumentException))]
+		public void CheckRangeRead ()
+		{
+			byte [] data = {0x1f, 0x8b, 0x08, 0x08, 0x70, 0xbb, 0x5d, 0x41, 0x00, 0x03, 0x74, 0x65, 0x73, 0x74, 0x00, 0xf3, 0x48, 0xcd, 0xc9, 0xc9, 0xe7, 0x02, 0x00, 0x16, 0x35, 0x96, 0x31, 0x06, 0x00, 0x00, 0x00 };
+			byte [] dummy = new byte[20];
+			MemoryStream backing = new MemoryStream (data);
+			GZipStream decompressing = new GZipStream (backing, CompressionMode.Decompress);
+			decompressing.Read (dummy, 10, 20);
+		}
+
+#if !MOBILE
+		[Test]
+		[Category("NotWorking")]
+		public void CheckInvalidDataRead ()
+		{
+			byte [] data = {0x1f, 0x8b, 0x08, 0x08, 0x70, 0xbb, 0x5d, 0x41, 0x00, 0x03, 0x74, 0x65, 0x73, 0x74, 0x00, 0x11, 0x78, 0x89, 0x91, 0xbe, 0xf3, 0x48, 0xcd, 0xc9, 0xc9, 0xe7, 0x02, 0x00, 0x16, 0x35, 0x96, 0x31, 0x06, 0x00, 0x00, 0x00 };
+			byte [] dummy = new byte[20];
+			MemoryStream backing = new MemoryStream (data);
+			GZipStream decompressing = new GZipStream (backing, CompressionMode.Decompress);
+			try {
+				decompressing.Read (dummy, 0, 20);
+				Assert.Fail ();
+			} catch (InvalidDataException) {
+			}
+		}
+#endif
+
+		[Test]
+		public void CheckClosedRead ()
+		{
+			byte [] dummy = new byte[20];
+			MemoryStream backing = new MemoryStream (compressed_data);
+			GZipStream decompressing = new GZipStream (backing, CompressionMode.Decompress);
+			decompressing.Close ();
+			try {
+				decompressing.Read (dummy, 0, 20);
+				Assert.Fail ();
+			} catch (ObjectDisposedException) {
+			}
+		}
+
+		[Test]
+		[ExpectedException (typeof (ObjectDisposedException))]
+		public void CheckClosedFlush ()
+		{
+			MemoryStream backing = new MemoryStream ();
+			GZipStream compressing = new GZipStream (backing, CompressionMode.Compress);
+			compressing.Close ();
+			compressing.Flush ();
+		}
+
+		[Test]
+		[ExpectedException (typeof (NotSupportedException))]
+		public void CheckSeek ()
+		{
+			MemoryStream backing = new MemoryStream (compressed_data);
+			GZipStream decompressing = new GZipStream (backing, CompressionMode.Decompress);
+			decompressing.Seek (20, SeekOrigin.Current);
+		}
+
+		[Test]
+		[ExpectedException (typeof (NotSupportedException))]
+		public void CheckSetLength ()
+		{
+			MemoryStream backing = new MemoryStream (compressed_data);
+			GZipStream decompressing = new GZipStream (backing, CompressionMode.Decompress);
+			decompressing.SetLength (20);
+		}
+
+		[Test]
+		public void CheckGetCanSeekProp ()
+		{
+			MemoryStream backing = new MemoryStream (compressed_data);
+			GZipStream decompress = new GZipStream (backing, CompressionMode.Decompress);
+			Assert.IsFalse (decompress.CanSeek, "#A1");
+			Assert.IsTrue (backing.CanSeek, "#A2");
+			decompress.Dispose ();
+			Assert.IsFalse (decompress.CanSeek, "#A3");
+			Assert.IsFalse (backing.CanSeek, "#A4");
+
+			backing = new MemoryStream ();
+			GZipStream compress = new GZipStream (backing, CompressionMode.Compress);
+			Assert.IsFalse (compress.CanSeek, "#B1");
+			Assert.IsTrue (backing.CanSeek, "#B2");
+			compress.Dispose ();
+			Assert.IsFalse (decompress.CanSeek, "#B3");
+			Assert.IsFalse (backing.CanSeek, "#B4");
+		}
+
+		[Test]
+		public void CheckGetCanReadProp ()
+		{
+			MemoryStream backing = new MemoryStream (compressed_data);
+			GZipStream decompress = new GZipStream (backing, CompressionMode.Decompress);
+			Assert.IsTrue (decompress.CanRead, "#A1");
+			Assert.IsTrue (backing.CanRead, "#A2");
+			decompress.Dispose ();
+			Assert.IsFalse (decompress.CanRead, "#A3");
+			Assert.IsFalse (backing.CanRead, "#A4");
+
+			backing = new MemoryStream ();
+			GZipStream compress = new GZipStream (backing, CompressionMode.Compress);
+			Assert.IsFalse (compress.CanRead, "#B1");
+			Assert.IsTrue (backing.CanRead, "#B2");
+			compress.Dispose ();
+			Assert.IsFalse (decompress.CanRead, "#B3");
+			Assert.IsFalse (backing.CanRead, "#B4");
+		}
+
+		[Test]
+		public void CheckGetCanWriteProp ()
+		{
+			MemoryStream backing = new MemoryStream (compressed_data);
+			GZipStream decompress = new GZipStream (backing, CompressionMode.Decompress);
+			Assert.IsFalse (decompress.CanWrite, "#A1");
+			Assert.IsTrue (backing.CanWrite, "#A2");
+			decompress.Dispose ();
+			Assert.IsFalse (decompress.CanWrite, "#A3");
+			Assert.IsFalse (backing.CanWrite, "#A4");
+
+			backing = new MemoryStream ();
+			GZipStream compress = new GZipStream (backing, CompressionMode.Compress);
+			Assert.IsTrue (compress.CanWrite, "#B1");
+			Assert.IsTrue (backing.CanWrite, "#B2");
+			compress.Dispose ();
+			Assert.IsFalse (decompress.CanWrite, "#B3");
+			Assert.IsFalse (backing.CanWrite, "#B4");
+		}
+
+		[Test]
+		[ExpectedException (typeof (NotSupportedException))]
+		public void CheckSetLengthProp ()
+		{
+			MemoryStream backing = new MemoryStream (compressed_data);
+			GZipStream decompressing = new GZipStream (backing, CompressionMode.Decompress);
+			decompressing.SetLength (20);
+		}
+
+		[Test]
+		[ExpectedException (typeof (NotSupportedException))]
+		public void CheckGetLengthProp ()
+		{
+			MemoryStream backing = new MemoryStream (compressed_data);
+			GZipStream decompressing = new GZipStream (backing, CompressionMode.Decompress);
+			long length = decompressing.Length;
+		}
+
+		[Test]
+		[ExpectedException (typeof (NotSupportedException))]
+		public void CheckGetPositionProp ()
+		{
+			MemoryStream backing = new MemoryStream (compressed_data);
+			GZipStream decompressing = new GZipStream (backing, CompressionMode.Decompress);
+			long position = decompressing.Position;
+		}
+
+		[Test]
+		public void DisposeTest ()
+		{
+			MemoryStream backing = new MemoryStream (compressed_data);
+			GZipStream decompress = new GZipStream (backing, CompressionMode.Decompress);
+			decompress.Dispose ();
+			decompress.Dispose ();
+		}
+
+		[Test]
+		public void DisposeOrderTest ()
+		{
+			var fs = new MemoryStream();
+			GZipStream compressed = new GZipStream(fs, CompressionMode.Compress);
+			byte[] buffer = new byte[1024];
+			compressed.Write(buffer, 0, buffer.Length);
+			compressed.Close();
+
+			try {
+				fs.WriteByte(2);
+				Assert.Fail ();
+			} catch (ObjectDisposedException) {
+			}			
+		}
+
+		static byte [] compressed_data = {
+			0x1f, 0x8b, 0x08, 0x08, 0x70, 0xbb, 0x5d, 0x41, 0x00,
+			0x03, 0x74, 0x65, 0x73, 0x74, 0x00, 0xf3, 0x48, 0xcd,
+			0xc9, 0xc9, 0xe7, 0x02, 0x00, 0x16, 0x35, 0x96, 0x31,
+			0x06, 0x00, 0x00, 0x00};
+	}
+}
+