public void ReadByPieces()
{
var baseStream = new MemoryStream();
var data = GenerateSomeInputData();
using (var writer = new CustomCompressionStream(baseStream, false))
writer.Write(data, 0, data.Length);
var reader = new CustomCompressionStream(baseStream, true);
baseStream.Position = 0;
var readData = new List <byte>();
var piece = new byte[5];
while (true)
{
int cnt = reader.Read(piece, 0, piece.Length);
if (cnt == 0)
{
break;
}
readData.AddRange(piece.Take(cnt));
}
CollectionAssert.AreEqual(data, readData);
}
public void RandomizedWriteReadTest()
{
var baseStream = new MemoryStream();
var data = GenerateSomeInputData();
using (var writer = new CustomCompressionStream(baseStream, false))
writer.Write(data, 0, data.Length);
var ratio = (double)baseStream.Position / data.Length;
Assert.Less(ratio, 0.95);
baseStream.Position = 0;
var reader = new CustomCompressionStream(baseStream, true);
var readData = new List <byte>();
var buffer = new byte[10];
while (true)
{
int cnt = reader.Read(buffer, 0, buffer.Length);
if (cnt == 0)
{
break;
}
readData.AddRange(buffer.Take(cnt));
}
CollectionAssert.AreEqual(data, readData);
}
void Test()
{
var baseStream = new MemoryStream();
var writer = new CustomCompressionStream(baseStream, false);
var data = new List<byte>();
var random = new Random();
for (int i = 0; i < 50 + random.Next(100); i++)
{
var bt = (byte)random.Next(255);
for (int j = 0; j < 2 + random.Next(2); j++)
data.Add(bt);
}
writer.Write(data.ToArray(), 0, data.Count);
var ratio = (double)baseStream.Position / data.Count;
Assert.Less(ratio, 0.95);
baseStream.Position = 0;
var reader = new CustomCompressionStream(baseStream, true);
var readData = new List<byte>();
var buffer = new byte[10];
while (true)
{
int cnt=reader.Read(buffer, 0, buffer.Length);
readData.AddRange(buffer.Take(cnt));
if (cnt < buffer.Length) break;
}
CollectionAssert.AreEqual(data, readData);
}
public void WriteByPiecesIsEqualToFullWrite()
{
var data = new List <byte>();
var baseStream1 = new MemoryStream();
using (var writer1 = new CustomCompressionStream(baseStream1, false))
{
for (int partIndex = 0; partIndex < 10; ++partIndex)
{
var part = GenerateSomeInputData(10, 1);
part[0] = 0;
writer1.Write(part, 0, part.Length);
data.AddRange(part);
}
}
var baseStream2 = new MemoryStream();
using (var writer2 = new CustomCompressionStream(baseStream2, false))
writer2.Write(data.ToArray(), 0, data.Count);
var arr1 = baseStream1.ToArray();
var arr2 = baseStream2.ToArray();
CollectionAssert.AreEqual(baseStream1.ToArray(), baseStream2.ToArray());
}
public void FailOnOddLengthOfBaseStream()
{
var baseStream = new MemoryStream(WriteAll(new byte[] { 1, 2, 3, 5, 6 }).Take(3).ToArray());
var reader = new CustomCompressionStream(baseStream, true);
var buffer = new byte[1000];
Assert.Throws <InvalidOperationException>(() => reader.Read(buffer, 0, buffer.Length));
}
public void DoNotReadInConstructor()
{
var baseStream = new MemoryStream(new byte[] { 1, 2, 3, 4 });
var writer = new CustomCompressionStream(baseStream, false);
Assert.NotNull(writer);
Assert.AreEqual(0, baseStream.Position);
}
private byte[] WriteAll(byte[] input)
{
var baseStream = new MemoryStream();
using (var compressor = new CustomCompressionStream(baseStream, false))
compressor.Write(input, 0, input.Length);
return(baseStream.ToArray());
}
public void CanReadForReader()
{
var baseStream = new MemoryStream();
var reader = new CustomCompressionStream(baseStream, true);
Assert.AreEqual(true, reader.CanRead);
Assert.AreEqual(false, reader.CanWrite);
}
public void ReadLessBytesThanRequested()
{
var baseStream = new MemoryStream(WriteAll(new byte[] { 1, 1, 1, 1 }));
var reader = new CustomCompressionStream(baseStream, true);
var buffer = new byte[10];
int cnt = reader.Read(buffer, 0, 10);
Assert.Less(cnt, 10);
}
public void ReadIsLazy()
{
var baseStream = new InfinityStream();
var reader = new CustomCompressionStream(baseStream, true);
var buffer = new byte[1000];
int cnt = reader.Read(buffer, 0, buffer.Length);
Assert.AreEqual(cnt, buffer.Length);
CollectionAssert.AreEqual(Enumerable.Repeat(1, 1000), buffer);
}
public void BaseStreamReturnsLessThanRequestedOnRead()
{
var baseStream = new PartialStream(1, WriteAll(new byte[] { 1, 1, 1, 1, 1 }));
var reader = new CustomCompressionStream(baseStream, true);
var buffer = new byte[5];
var count = reader.Read(buffer, 0, buffer.Length);
Assert.AreEqual(buffer.Length, count);
CollectionAssert.AreEqual(Enumerable.Repeat(1, 5), buffer);
}
public void ReadTheSameDataWasWritten()
{
var baseStream = new MemoryStream();
var data = GenerateSomeInputData();
using (var writer = new CustomCompressionStream(baseStream, false))
writer.Write(data, 0, data.Length);
baseStream.Position = 0;
var reader = new CustomCompressionStream(baseStream, true);
CollectionAssert.AreEqual(data, ReadAll(reader));
}
public void WriteCompressData()
{
var baseStream = new MemoryStream();
var data = GenerateSomeInputData();
using (var writer = new CustomCompressionStream(baseStream, false))
writer.Write(data.ToArray(), 0, data.Length);
var ratio = (double)baseStream.Position / data.Length;
Assert.Less(ratio, 0.95);
Assert.Pass($"Compress ratio is {ratio:0.#%}");
}
public void CheckNotSupportedException()
{
var baseStream = new MemoryStream();
var writer = new CustomCompressionStream(baseStream, false);
Assert.Throws <NotSupportedException>(() => writer.SetLength(0));
long x;
Assert.Throws <NotSupportedException>(() => x = writer.Length);
Assert.Throws <NotSupportedException>(() => writer.Position++);
Assert.AreEqual(false, writer.CanSeek);
Assert.Throws <NotSupportedException>(() => writer.Seek(0, SeekOrigin.Current));
}
public void ReadNothingFromEmptyStream()
{
var baseStream = new MemoryStream();
var data = new byte[0];
using (var writer = new CustomCompressionStream(baseStream, false))
writer.Write(data, 0, data.Length);
baseStream.Position = 0;
var reader = new CustomCompressionStream(baseStream, true);
CollectionAssert.AreEqual(data, ReadAll(reader));
}
public void WriteWithOffset()
{
var baseStream = new MemoryStream();
var data = new List <byte> {
1, 2, 2, 3, 3, 3
};
using (var writer = new CustomCompressionStream(baseStream, false))
writer.Write(data.ToArray(), 1, data.Count - 2);
baseStream.Position = 0;
var reader = new CustomCompressionStream(baseStream, true);
CollectionAssert.AreEqual(new[] { 2, 2, 3, 3 }, ReadAll(reader));
}
public void WriteLongSequenceOfOneSymbol()
{
var baseStream = new MemoryStream();
var data = new List <byte>();
for (int i = 0; i < 256; i++)
{
var bt = (byte)i;
for (int j = 0; j < 254 + 3 * i; j++)
{
data.Add(bt);
}
}
using (var writer = new CustomCompressionStream(baseStream, false))
writer.Write(data.ToArray(), 0, data.Count);
baseStream.Position = 0;
var reader = new CustomCompressionStream(baseStream, true);
CollectionAssert.AreEqual(data, ReadAll(reader));
}
public void ReadWithOffset()
{
var baseStream = new MemoryStream();
var data = new List <byte> {
1, 2, 2, 3, 3, 3
};
using (var writer = new CustomCompressionStream(baseStream, false))
writer.Write(data.ToArray(), 0, data.Count);
baseStream.Position = 0;
var reader = new CustomCompressionStream(baseStream, true);
var buffer = new byte[data.Count];
var readCount = buffer.Length - 2;
int cnt = reader.Read(buffer, 1, readCount);
Assert.AreEqual(cnt, readCount);
Assert.AreEqual(0, buffer[0]);
Assert.AreEqual(0, buffer[buffer.Length - 1]);
CollectionAssert.AreEqual(
data.Take(readCount),
buffer.Skip(1).Take(readCount));
}
