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GZipTests.cs
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GZipTests.cs
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using System;
using System.IO;
using System.Threading;
using ICSharpCode.SharpZipLib.Zip.Compression;
using ICSharpCode.SharpZipLib.Zip.Compression.Streams;
using ICSharpCode.SharpZipLib.GZip;
using NUnit.Framework;
using ICSharpCode.SharpZipLib.Tests.TestSupport;
namespace ICSharpCode.SharpZipLib.Tests.GZip
{
/// <summary>
/// This class contains test cases for GZip compression
/// </summary>
[TestFixture]
public class GZipTestSuite
{
/// <summary>
/// Basic compress/decompress test
/// </summary>
[Test]
[Category("GZip")]
public void TestGZip()
{
MemoryStream ms = new MemoryStream();
GZipOutputStream outStream = new GZipOutputStream(ms);
byte[] buf = new byte[100000];
System.Random rnd = new Random();
rnd.NextBytes(buf);
outStream.Write(buf, 0, buf.Length);
outStream.Flush();
outStream.Finish();
ms.Seek(0, SeekOrigin.Begin);
GZipInputStream inStream = new GZipInputStream(ms);
byte[] buf2 = new byte[buf.Length];
int currentIndex = 0;
int count = buf2.Length;
while (true) {
int numRead = inStream.Read(buf2, currentIndex, count);
if (numRead <= 0) {
break;
}
currentIndex += numRead;
count -= numRead;
}
Assert.AreEqual(0, count);
for (int i = 0; i < buf.Length; ++i) {
Assert.AreEqual(buf2[i], buf[i]);
}
}
/// <summary>
/// Writing GZip headers is delayed so that this stream can be used with HTTP/IIS.
/// </summary>
[Test]
[Category("GZip")]
public void DelayedHeaderWriteNoData()
{
MemoryStream ms = new MemoryStream();
Assert.AreEqual(0, ms.Length);
using (GZipOutputStream outStream = new GZipOutputStream(ms)) {
Assert.AreEqual(0, ms.Length);
}
byte[] data = ms.ToArray();
Assert.IsTrue(data.Length > 0);
}
/// <summary>
/// Writing GZip headers is delayed so that this stream can be used with HTTP/IIS.
/// </summary>
[Test]
[Category("GZip")]
public void DelayedHeaderWriteWithData()
{
MemoryStream ms = new MemoryStream();
Assert.AreEqual(0, ms.Length);
using (GZipOutputStream outStream = new GZipOutputStream(ms)) {
Assert.AreEqual(0, ms.Length);
outStream.WriteByte(45);
// Should in fact contain header right now with
// 1 byte in the compression pipeline
Assert.AreEqual(10, ms.Length);
}
byte[] data = ms.ToArray();
Assert.IsTrue(data.Length > 0);
}
[Test]
[Category("GZip")]
public void ZeroLengthInputStream()
{
GZipInputStream gzi = new GZipInputStream(new MemoryStream());
bool exception = false;
try {
gzi.ReadByte();
}
catch {
exception = true;
}
Assert.IsTrue(exception, "reading from an empty stream should cause an exception");
}
[Test]
[Category("GZip")]
public void OutputStreamOwnership()
{
TrackedMemoryStream memStream = new TrackedMemoryStream();
GZipOutputStream s = new GZipOutputStream(memStream);
Assert.IsFalse(memStream.IsClosed, "Shouldnt be closed initially");
Assert.IsFalse(memStream.IsDisposed, "Shouldnt be disposed initially");
s.Close();
Assert.IsTrue(memStream.IsClosed, "Should be closed after parent owner close");
Assert.IsTrue(memStream.IsDisposed, "Should be disposed after parent owner close");
memStream = new TrackedMemoryStream();
s = new GZipOutputStream(memStream);
Assert.IsFalse(memStream.IsClosed, "Shouldnt be closed initially");
Assert.IsFalse(memStream.IsDisposed, "Shouldnt be disposed initially");
s.IsStreamOwner = false;
s.Close();
Assert.IsFalse(memStream.IsClosed, "Should not be closed after parent owner close");
Assert.IsFalse(memStream.IsDisposed, "Should not be disposed after parent owner close");
}
[Test]
[Category("GZip")]
public void InputStreamOwnership()
{
TrackedMemoryStream memStream = new TrackedMemoryStream();
GZipInputStream s = new GZipInputStream(memStream);
Assert.IsFalse(memStream.IsClosed, "Shouldnt be closed initially");
Assert.IsFalse(memStream.IsDisposed, "Shouldnt be disposed initially");
s.Close();
Assert.IsTrue(memStream.IsClosed, "Should be closed after parent owner close");
Assert.IsTrue(memStream.IsDisposed, "Should be disposed after parent owner close");
memStream = new TrackedMemoryStream();
s = new GZipInputStream(memStream);
Assert.IsFalse(memStream.IsClosed, "Shouldnt be closed initially");
Assert.IsFalse(memStream.IsDisposed, "Shouldnt be disposed initially");
s.IsStreamOwner = false;
s.Close();
Assert.IsFalse(memStream.IsClosed, "Should not be closed after parent owner close");
Assert.IsFalse(memStream.IsDisposed, "Should not be disposed after parent owner close");
}
[Test]
public void DoubleFooter()
{
TrackedMemoryStream memStream=new TrackedMemoryStream();
GZipOutputStream s=new GZipOutputStream(memStream);
s.Finish();
Int64 length=memStream.Length;
s.Close();
Assert.AreEqual(length, memStream.ToArray().Length);
}
[Test]
public void DoubleClose()
{
TrackedMemoryStream memStream=new TrackedMemoryStream();
GZipOutputStream s=new GZipOutputStream(memStream);
s.Finish();
s.Close();
s.Close();
memStream=new TrackedMemoryStream();
using( GZipOutputStream no2=new GZipOutputStream(memStream) )
{
s.Close();
}
}
[Test]
public void WriteAfterFinish()
{
TrackedMemoryStream memStream=new TrackedMemoryStream();
GZipOutputStream s=new GZipOutputStream(memStream);
s.Finish();
try
{
s.WriteByte(7);
Assert.Fail("Write should fail");
}
catch
{
}
}
[Test]
public void WriteAfterClose()
{
TrackedMemoryStream memStream=new TrackedMemoryStream();
GZipOutputStream s=new GZipOutputStream(memStream);
s.Close();
try
{
s.WriteByte(7);
Assert.Fail("Write should fail");
}
catch
{
}
}
[Test]
[Category("GZip")]
[Category("Long Running")]
public void BigStream()
{
window_ = new WindowedStream(0x3ffff);
outStream_ = new GZipOutputStream(window_);
inStream_ = new GZipInputStream(window_);
long target = 0x10000000;
readTarget_ = writeTarget_ = target;
Thread reader = new Thread(Reader);
reader.Name = "Reader";
reader.Start();
Thread writer = new Thread(Writer);
writer.Name = "Writer";
DateTime startTime = DateTime.Now;
writer.Start();
writer.Join();
reader.Join();
DateTime endTime = DateTime.Now;
TimeSpan span = endTime - startTime;
Console.WriteLine("Time {0} processes {1} KB/Sec", span, (target / 1024) / span.TotalSeconds);
}
void Reader()
{
const int Size = 8192;
int readBytes = 1;
byte[] buffer = new byte[Size];
long passifierLevel = readTarget_ - 0x10000000;
while ( (readTarget_ > 0) && (readBytes > 0) ) {
int count = Size;
if (count > readTarget_) {
count = (int)readTarget_;
}
readBytes = inStream_.Read(buffer, 0, count);
readTarget_ -= readBytes;
if (readTarget_ <= passifierLevel) {
Console.WriteLine("Reader {0} bytes remaining", readTarget_);
passifierLevel = readTarget_ - 0x10000000;
}
}
Assert.IsTrue(window_.IsClosed, "Window should be closed");
// This shouldnt read any data but should read the footer
readBytes = inStream_.Read(buffer, 0, 1);
Assert.AreEqual(0, readBytes, "Stream should be empty");
Assert.AreEqual(0, window_.Length, "Window should be closed");
inStream_.Close();
}
void Writer()
{
const int Size = 8192;
byte[] buffer = new byte[Size];
while (writeTarget_ > 0) {
int thisTime = Size;
if (thisTime > writeTarget_) {
thisTime = (int)writeTarget_;
}
outStream_.Write(buffer, 0, thisTime);
writeTarget_-= thisTime;
}
outStream_.Close();
}
WindowedStream window_;
GZipOutputStream outStream_;
GZipInputStream inStream_;
long readTarget_;
long writeTarget_;
}
}