public void Xz_EncoderCheckSHA256() { // Start with a MemoryStream created from the sample data using (MemoryStream source = new MemoryStream(s_sampledata)) { using (MemoryStream dest = new MemoryStream()) { // Compress the data into the destination memory stream instance XzEncoder encoder = new XzEncoder(); encoder.Checksum = XzChecksum.SHA256; encoder.Encode(source, dest); // The compressed data should be smaller than the source data Assert.IsTrue(dest.Length < source.Length); source.SetLength(0); // Clear the source stream dest.Position = 0; // Reset the destination stream // Decompress the data back into the source memory stream using (XzReader decompressor = new XzReader(dest, true)) decompressor.CopyTo(source); // Ensure that the original data has been restored Assert.AreEqual(source.Length, s_sampledata.Length); Assert.IsTrue(s_sampledata.SequenceEqual(source.ToArray())); } } }
public void Xz_Dispose() { byte[] buffer = new byte[8192]; // 8KiB data buffer // Create a memorystream to hold the compressed sample data using (MemoryStream ms = new MemoryStream()) { XzEncoder encoder = new XzEncoder(); encoder.Encode(s_sampledata, ms); // Create a decompression stream and immediately dispose of it XzReader stream = new XzReader(ms); stream.Dispose(); // Test double dispose stream.Dispose(); // All properties and methods should throw an ObjectDisposedException try { var bs = stream.BaseStream; Assert.Fail("Property access should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ObjectDisposedException)); } try { var b = stream.CanRead; Assert.Fail("Property access should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ObjectDisposedException)); } try { var b = stream.CanSeek; Assert.Fail("Property access should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ObjectDisposedException)); } try { var b = stream.CanWrite; Assert.Fail("Property access should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ObjectDisposedException)); } try { stream.Flush(); Assert.Fail("Method call should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ObjectDisposedException)); } try { var l = stream.Length; Assert.Fail("Property access should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ObjectDisposedException)); } try { var l = stream.Position; Assert.Fail("Property access should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ObjectDisposedException)); } try { stream.Position = 12345L; Assert.Fail("Property access should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ObjectDisposedException)); } try { stream.Read(buffer, 0, 8192); Assert.Fail("Method call should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ObjectDisposedException)); } try { stream.Seek(0, SeekOrigin.Current); Assert.Fail("Method call should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ObjectDisposedException)); } try { stream.SetLength(12345L); Assert.Fail("Method call should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ObjectDisposedException)); } try { stream.Write(buffer, 0, 8192); Assert.Fail("Method call should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ObjectDisposedException)); } } }
public void Xz_CompressExternal() { // This method generates an output file that can be tested externally; "thethreemusketeers.txt" is // set to Copy Always to the output directory, it can be diffed after running the external tool XzEncoder encoder = new XzEncoder(); using (var outfile = File.Create(Path.Combine(Environment.CurrentDirectory, "thethreemusketeers.xz"))) { encoder.Encode(s_sampledata, outfile); outfile.Flush(); } }
public void Xz_Write() { XzEncoder encoder = new XzEncoder(); var compressed = encoder.Encode(s_sampledata); using (XzReader reader = new XzReader(new MemoryStream(compressed))) { byte[] buffer = new byte[2048]; try { reader.Write(buffer, 0, buffer.Length); Assert.Fail("Method call should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(NotSupportedException)); } } }
public void Xz_BaseStream() { using (MemoryStream dest = new MemoryStream()) { XzEncoder encoder = new XzEncoder(); encoder.Encode(s_sampledata, dest); using (XzReader stream = new XzReader(dest)) { Assert.IsNotNull(stream.BaseStream); Assert.AreSame(dest, stream.BaseStream); } } }
public void Xz_Read() { byte[] buffer = new byte[8192]; // 8KiB data buffer using (MemoryStream compressed = new MemoryStream()) { XzEncoder encoder = new XzEncoder(); encoder.Encode(s_sampledata, compressed); compressed.Flush(); // Check the constructor for ArgumentNullException while we're here try { using (XzReader decompressor = new XzReader(null, false)) { }; Assert.Fail("Constructor should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ArgumentNullException)); } // Create a decompressor to test some of the error cases using (XzReader decompressor = new XzReader(compressed, true)) { // Send in some bum arguments to Read() to check they are caught try { decompressor.Read(null, 0, 0); Assert.Fail("Method call should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ArgumentNullException)); } try { decompressor.Read(buffer, -1, 0); Assert.Fail("Method call should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ArgumentOutOfRangeException)); } try { decompressor.Read(buffer, 0, -1); Assert.Fail("Method call should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ArgumentOutOfRangeException)); } try { decompressor.Read(buffer, 0, buffer.Length + 1024); Assert.Fail("Method call should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ArgumentException)); } // Attempting to read from the end of the compressed stream should throw an InvalidDataException try { decompressor.Read(buffer, 0, 8192); Assert.Fail("Method call should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(InvalidDataException)); } } // Create a new decompressor against the same stream and make sure it doesn't throw compressed.Position = 0; using (XzReader decompressor = new XzReader(compressed, true)) { // Reading zero bytes should not throw an exception decompressor.Read(buffer, 0, 0); while (decompressor.Read(buffer, 0, 8192) != 0) { } } } }
public void Xz_LzmaException() { using (MemoryStream compressed = new MemoryStream()) { XzEncoder encoder = new XzEncoder(); encoder.CompressionLevel = LzmaCompressionLevel.Optimal; encoder.Encode(s_sampledata, compressed); compressed.Flush(); byte[] buffer = new byte[8192]; LzmaException thrown = null; LzmaException deserialized = null; // Create a decompressor to test exception cases using (XzReader decompressor = new XzReader(compressed, true)) { // Attempting to read from the middle of the compressed stream should throw a LzmaException compressed.Position = compressed.Length / 2; try { decompressor.Read(buffer, 0, 8192); Assert.Fail("Method call should have thrown an exception"); } catch (LzmaException ex) { thrown = ex; } Assert.IsNotNull(thrown); Assert.IsInstanceOfType(thrown, typeof(LzmaException)); // Check the error code property Assert.AreEqual(17, thrown.ErrorCode); // SZ_ERROR_NO_ARCHIVE (17) // Serialize and de-serialize the exception with a BinaryFormatter BinaryFormatter formatter = new BinaryFormatter(); using (MemoryStream memstream = new MemoryStream()) { formatter.Serialize(memstream, thrown); memstream.Seek(0, 0); deserialized = (LzmaException)formatter.Deserialize(memstream); } // Check that the exceptions are equivalent Assert.AreEqual(thrown.ErrorCode, deserialized.ErrorCode); Assert.AreEqual(thrown.StackTrace, deserialized.StackTrace); Assert.AreEqual(thrown.ToString(), deserialized.ToString()); } } }
public void Xz_Position() { // Start with a MemoryStream created from the sample data using (MemoryStream compressed = new MemoryStream(s_sampledata)) { XzEncoder encoder = new XzEncoder(); encoder.Encode(s_sampledata, compressed); compressed.Position = 0; using (XzReader reader = new XzReader(compressed)) { // Attempting to set the position on the stream should throw try { reader.Position = 12345L; Assert.Fail("Property should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(NotSupportedException)); } // Read some data from the stream, position should still throw for XzReader byte[] buffer = new byte[8192]; try { var p = reader.Position; Assert.Fail("Property should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(NotSupportedException)); } } } }
public void Xz_Encoder() { XzEncoder encoder = new XzEncoder(); // Check the default values Assert.AreEqual(Lzma2BlockSize.Disabled, encoder.BlockSize); Assert.AreEqual(XzChecksum.Default, encoder.Checksum); Assert.AreEqual(LzmaCompressionLevel.Default, encoder.CompressionLevel); Assert.AreEqual(LzmaCompressionMode.Default, encoder.CompressionMode); Assert.AreEqual(LzmaDictionarySize.Default, encoder.DictionarySize); Assert.AreEqual(LzmaFastBytes.Default, encoder.FastBytes); Assert.AreEqual(LzmaHashBytes.Default, encoder.HashBytes); Assert.AreEqual(LzmaLiteralContextBits.Default, encoder.LiteralContextBits); Assert.AreEqual(LzmaLiteralPositionBits.Default, encoder.LiteralPositionBits); Assert.AreEqual(LzmaMatchFindMode.Default, encoder.MatchFindMode); Assert.AreEqual(LzmaMatchFindPasses.Default, encoder.MatchFindPasses); Assert.AreEqual(Lzma2MaximumThreads.Default, encoder.MaximumThreads); Assert.AreEqual(LzmaPositionBits.Default, encoder.PositionBits); Assert.AreEqual(Lzma2ThreadsPerBlock.Default, encoder.ThreadsPerBlock); Assert.AreEqual(true, encoder.UseMultipleThreads); Assert.AreEqual(true, encoder.WriteEndMark); // Set and reset encoder parameters to exercise the property setters encoder.BlockSize = Int32.MaxValue; Assert.AreEqual(Int32.MaxValue, encoder.BlockSize); encoder.BlockSize = Lzma2BlockSize.Disabled; Assert.AreEqual(Lzma2BlockSize.Disabled, encoder.BlockSize); encoder.Checksum = XzChecksum.SHA256; Assert.AreEqual(XzChecksum.SHA256, encoder.Checksum); encoder.Checksum = XzChecksum.Default; Assert.AreEqual(XzChecksum.Default, encoder.Checksum); encoder.CompressionLevel = LzmaCompressionLevel.Fastest; Assert.AreEqual(LzmaCompressionLevel.Fastest, encoder.CompressionLevel); encoder.CompressionLevel = LzmaCompressionLevel.Default; Assert.AreEqual(LzmaCompressionLevel.Default, encoder.CompressionLevel); encoder.CompressionMode = LzmaCompressionMode.Fast; Assert.AreEqual(LzmaCompressionMode.Fast, encoder.CompressionMode); encoder.CompressionMode = LzmaCompressionMode.Default; Assert.AreEqual(LzmaCompressionMode.Default, encoder.CompressionMode); encoder.DictionarySize = LzmaDictionarySize.Maximum; Assert.AreEqual(LzmaDictionarySize.Maximum, encoder.DictionarySize); encoder.DictionarySize = LzmaDictionarySize.Default; Assert.AreEqual(LzmaDictionarySize.Default, encoder.DictionarySize); encoder.FastBytes = LzmaFastBytes.Maximum; Assert.AreEqual(LzmaFastBytes.Maximum, encoder.FastBytes); encoder.FastBytes = LzmaFastBytes.Default; Assert.AreEqual(LzmaFastBytes.Default, encoder.FastBytes); encoder.HashBytes = LzmaHashBytes.Maximum; Assert.AreEqual(LzmaHashBytes.Maximum, encoder.HashBytes); encoder.HashBytes = LzmaHashBytes.Default; Assert.AreEqual(LzmaHashBytes.Default, encoder.HashBytes); encoder.LiteralContextBits = LzmaLiteralContextBits.Maximum; Assert.AreEqual(LzmaLiteralContextBits.Maximum, encoder.LiteralContextBits); encoder.LiteralContextBits = LzmaLiteralContextBits.Default; Assert.AreEqual(LzmaLiteralContextBits.Default, encoder.LiteralContextBits); encoder.LiteralPositionBits = LzmaLiteralPositionBits.Maximum; Assert.AreEqual(LzmaLiteralPositionBits.Maximum, encoder.LiteralPositionBits); encoder.LiteralPositionBits = LzmaLiteralPositionBits.Default; Assert.AreEqual(LzmaLiteralPositionBits.Default, encoder.LiteralPositionBits); encoder.MatchFindMode = LzmaMatchFindMode.HashChain; Assert.AreEqual(LzmaMatchFindMode.HashChain, encoder.MatchFindMode); encoder.MatchFindMode = LzmaMatchFindMode.Default; Assert.AreEqual(LzmaMatchFindMode.Default, encoder.MatchFindMode); encoder.MatchFindPasses = LzmaMatchFindPasses.Maximum; Assert.AreEqual(LzmaMatchFindPasses.Maximum, encoder.MatchFindPasses); encoder.MatchFindPasses = LzmaMatchFindPasses.Default; Assert.AreEqual(LzmaMatchFindPasses.Default, encoder.MatchFindPasses); encoder.MaximumThreads = 256; Assert.AreEqual(256, encoder.MaximumThreads); encoder.MaximumThreads = Lzma2MaximumThreads.Default; Assert.AreEqual(Lzma2MaximumThreads.Default, encoder.MaximumThreads); encoder.PositionBits = LzmaPositionBits.Maximum; Assert.AreEqual(LzmaPositionBits.Maximum, encoder.PositionBits); encoder.PositionBits = LzmaPositionBits.Default; Assert.AreEqual(LzmaPositionBits.Default, encoder.PositionBits); encoder.ThreadsPerBlock = 10; Assert.AreEqual(10, encoder.ThreadsPerBlock); encoder.ThreadsPerBlock = Lzma2ThreadsPerBlock.Default; Assert.AreEqual(Lzma2ThreadsPerBlock.Default, encoder.ThreadsPerBlock); encoder.UseMultipleThreads = false; Assert.AreEqual(false, encoder.UseMultipleThreads); encoder.UseMultipleThreads = true; Assert.AreEqual(true, encoder.UseMultipleThreads); encoder.WriteEndMark = false; Assert.AreEqual(false, encoder.WriteEndMark); encoder.WriteEndMark = true; Assert.AreEqual(true, encoder.WriteEndMark); // Check all of the Encoder methods work and encode as expected byte[] expected, expectedstreamed, actual; // There are 2 expected results since when the length of the input // is known it's encoded into the compressed stream using (MemoryStream ms = new MemoryStream()) { encoder.Encode(s_sampledata, ms); ms.Flush(); expected = ms.ToArray(); } using (MemoryStream ms = new MemoryStream()) { encoder.Encode(new MemoryStream(s_sampledata), ms); ms.Flush(); expectedstreamed = ms.ToArray(); } // Check parameter validations try { actual = encoder.Encode((byte[])null); Assert.Fail("Method call should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ArgumentNullException)); } try { actual = encoder.Encode((Stream)null); Assert.Fail("Method call should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ArgumentNullException)); } try { actual = encoder.Encode(null, 0, 0); Assert.Fail("Method call should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ArgumentNullException)); } try { encoder.Encode(s_sampledata, null); Assert.Fail("Method call should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ArgumentNullException)); } try { encoder.Encode((byte[])null, new MemoryStream()); Assert.Fail("Method call should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ArgumentNullException)); } try { encoder.Encode((byte[])null, 0, 0, new MemoryStream()); Assert.Fail("Method call should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ArgumentNullException)); } try { encoder.Encode(s_sampledata, 0, s_sampledata.Length, (Stream)null); Assert.Fail("Method call should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ArgumentNullException)); } try { encoder.Encode((Stream)null, new MemoryStream()); Assert.Fail("Method call should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ArgumentNullException)); } try { encoder.Encode(new MemoryStream(), (Stream)null); Assert.Fail("Method call should have thrown an exception"); } catch (Exception ex) { Assert.IsInstanceOfType(ex, typeof(ArgumentNullException)); } // Check actual encoding operations actual = encoder.Encode(s_sampledata); Assert.IsTrue(Enumerable.SequenceEqual(expected, actual)); // length is known actual = encoder.Encode(new MemoryStream(s_sampledata)); Assert.IsTrue(Enumerable.SequenceEqual(expectedstreamed, actual)); // length is not known actual = encoder.Encode(s_sampledata, 0, s_sampledata.Length); // length is known Assert.IsTrue(Enumerable.SequenceEqual(expected, actual)); using (MemoryStream dest = new MemoryStream()) { encoder.Encode(s_sampledata, dest); Assert.IsTrue(Enumerable.SequenceEqual(expected, dest.ToArray())); // length is known } using (MemoryStream dest = new MemoryStream()) { encoder.Encode(new MemoryStream(s_sampledata), dest); Assert.IsTrue(Enumerable.SequenceEqual(expectedstreamed, dest.ToArray())); // length is not known } using (MemoryStream dest = new MemoryStream()) { encoder.Encode(s_sampledata, 0, s_sampledata.Length, dest); Assert.IsTrue(Enumerable.SequenceEqual(expected, dest.ToArray())); // length is known } }