public void TestReadFromUnseekableStream()
{
MemoryStream firstStream = new MemoryStream();
// Now the second stream _does_ support seeking. If the stream chainer ignores
// that, it would overwrite data in the second stream.
MemoryStream secondStream = new MemoryStream();
secondStream.Write(new byte[] { 0, 9, 8, 7, 6 }, 0, 5);
secondStream.Position = 3;
TestStream testStream = new TestStream(firstStream, true, true, false);
ChainStream chainer = new ChainStream(new Stream[] { testStream, secondStream });
Assert.IsFalse(chainer.CanSeek);
byte[] buffer = new byte[5];
int readByteCount = chainer.Read(buffer, 0, 3);
Assert.AreEqual(3, readByteCount);
Assert.AreEqual(new byte[] { 0, 9, 8, 0, 0 }, buffer);
readByteCount = chainer.Read(buffer, 0, 3);
Assert.AreEqual(2, readByteCount);
Assert.AreEqual(new byte[] { 7, 6, 8, 0, 0 }, buffer);
}
public void TestThrowOnLengthChange()
{
ChainStream chainer = chainTwoStreamsOfTenBytes();
Assert.Throws <NotSupportedException>(
delegate() { chainer.SetLength(123); }
);
}
public void TestSeeking()
{
ChainStream chainer = chainTwoStreamsOfTenBytes();
Assert.AreEqual(7, chainer.Seek(-13, SeekOrigin.End));
Assert.AreEqual(14, chainer.Seek(7, SeekOrigin.Current));
Assert.AreEqual(11, chainer.Seek(11, SeekOrigin.Begin));
}
public void TestThrowOnInvalidSeekReferencePoint()
{
ChainStream chainer = chainTwoStreamsOfTenBytes();
Assert.Throws <ArgumentException>(
delegate() { chainer.Seek(1, (SeekOrigin)12345); }
);
}
public void TestPositionChange()
{
ChainStream chainer = chainTwoStreamsOfTenBytes();
chainer.Position = 7;
Assert.AreEqual(chainer.Position, 7);
chainer.Position = 14;
Assert.AreEqual(chainer.Position, 14);
}
public void TestThrowOnWriteToUnwriteableStream()
{
MemoryStream memoryStream = new MemoryStream();
TestStream testStream = new TestStream(memoryStream, true, false, true);
ChainStream chainer = new ChainStream(new Stream[] { testStream });
Assert.Throws <NotSupportedException>(
delegate() { chainer.Write(new byte[] { 1, 2, 3, 4, 5 }, 0, 5); }
);
}
public void TestThrowOnReadFromUnreadableStream()
{
MemoryStream memoryStream = new MemoryStream();
TestStream testStream = new TestStream(memoryStream, false, true, true);
ChainStream chainer = new ChainStream(new Stream[] { testStream });
Assert.Throws <NotSupportedException>(
delegate() { chainer.Read(new byte[5], 0, 5); }
);
}
public void TestThrowOnSetPositionWithUnseekableStream()
{
MemoryStream memoryStream = new MemoryStream();
TestStream testStream = new TestStream(memoryStream, true, true, false);
ChainStream chainer = new ChainStream(new Stream[] { testStream });
Assert.Throws <NotSupportedException>(
delegate() { chainer.Position = 123; }
);
}
public void TestThrowOnGetLengthWithUnseekableStream()
{
MemoryStream memoryStream = new MemoryStream();
TestStream testStream = new TestStream(memoryStream, true, true, false);
ChainStream chainer = new ChainStream(new Stream[] { testStream });
Assert.Throws <NotSupportedException>(
delegate() { Assert.IsTrue(chainer.Length != chainer.Length); }
);
}
public void TestReadBeyondEndOfStream()
{
ChainStream chainer = chainTwoStreamsOfTenBytes();
chainer.Seek(10, SeekOrigin.End);
// This is how the MemoryStream behaves: it returns 0 bytes.
int readByteCount = chainer.Read(new byte[1], 0, 1);
Assert.AreEqual(0, readByteCount);
}
public void TestPartitionedRead()
{
ChainStream chainer = chainTwoStreamsOfTenBytes();
((MemoryStream)chainer.ChainedStreams[0]).Write(
new byte[] { 1, 2, 3, 4, 5 }, 0, 5
);
((MemoryStream)chainer.ChainedStreams[1]).Write(
new byte[] { 6, 7, 8, 9, 10 }, 0, 5
);
chainer.Position = 3;
byte[] buffer = new byte[15];
int bytesRead = chainer.Read(buffer, 0, 14);
Assert.AreEqual(14, bytesRead);
Assert.AreEqual(new byte[] { 4, 5, 0, 0, 0, 0, 0, 6, 7, 8, 9, 10, 0, 0, 0 }, buffer);
}
public void TestWriteToUnseekableStream()
{
MemoryStream firstStream = new MemoryStream();
// Now the second stream _does_ support seeking. If the stream chainer ignores
// that, it would overwrite data in the second stream.
MemoryStream secondStream = new MemoryStream();
secondStream.Write(new byte[] { 0, 9, 8, 7, 6 }, 0, 5);
secondStream.Position = 0;
TestStream testStream = new TestStream(firstStream, true, true, false);
ChainStream chainer = new ChainStream(new Stream[] { testStream, secondStream });
chainer.Write(new byte[] { 1, 2, 3, 4, 5 }, 0, 5);
Assert.IsFalse(chainer.CanSeek);
Assert.AreEqual(0, firstStream.Length);
Assert.AreEqual(new byte[] { 0, 9, 8, 7, 6, 1, 2, 3, 4, 5 }, secondStream.ToArray());
}
public void TestFlush()
{
MemoryStream firstStream = new MemoryStream();
TestStream firstTestStream = new TestStream(firstStream, true, true, true);
MemoryStream secondStream = new MemoryStream();
TestStream secondTestStream = new TestStream(secondStream, true, true, true);
ChainStream chainer = new ChainStream(
new Stream[] { firstTestStream, secondTestStream }
);
Assert.AreEqual(0, firstTestStream.FlushCallCount);
Assert.AreEqual(0, secondTestStream.FlushCallCount);
chainer.Flush();
Assert.AreEqual(1, firstTestStream.FlushCallCount);
Assert.AreEqual(1, secondTestStream.FlushCallCount);
}
public void TestWriteAfterResize()
{
ChainStream chainer = chainTwoStreamsOfTenBytes();
// The first stream has a size of 10 bytes, so this goes into the second stream
chainer.Position = 11;
chainer.Write(new byte[] { 12, 34 }, 0, 2);
// Now we resize the first stream to 15 bytes, so this goes into the first stream
((MemoryStream)chainer.ChainedStreams[0]).SetLength(15);
chainer.Write(new byte[] { 56, 78, 11, 22 }, 0, 4);
Assert.AreEqual(
new byte[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 56, 78 },
((MemoryStream)chainer.ChainedStreams[0]).ToArray()
);
Assert.AreEqual(
new byte[] { 11, 22, 34, 0, 0, 0, 0, 0, 0, 0 },
((MemoryStream)chainer.ChainedStreams[1]).ToArray()
);
}
public void TestPartitionedWrite()
{
ChainStream chainer = chainTwoStreamsOfTenBytes();
byte[] testData = new byte[20];
for (int index = 0; index < testData.Length; ++index)
{
testData[index] = (byte)(index + 1);
}
chainer.Position = 5;
chainer.Write(testData, 0, testData.Length);
Assert.AreEqual(
new byte[] { 0, 0, 0, 0, 0, 1, 2, 3, 4, 5 },
((MemoryStream)chainer.ChainedStreams[0]).ToArray()
);
Assert.AreEqual(
new byte[] { 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 },
((MemoryStream)chainer.ChainedStreams[1]).ToArray()
);
}
public void TestWriteToUnseekableStream() {
MemoryStream firstStream = new MemoryStream();
// Now the second stream _does_ support seeking. If the stream chainer ignores
// that, it would overwrite data in the second stream.
MemoryStream secondStream = new MemoryStream();
secondStream.Write(new byte[] { 0, 9, 8, 7, 6 }, 0, 5);
secondStream.Position = 0;
TestStream testStream = new TestStream(firstStream, true, true, false);
ChainStream chainer = new ChainStream(new Stream[] { testStream, secondStream });
chainer.Write(new byte[] { 1, 2, 3, 4, 5 }, 0, 5);
Assert.IsFalse(chainer.CanSeek);
Assert.AreEqual(0, firstStream.Length);
Assert.AreEqual(new byte[] { 0, 9, 8, 7, 6, 1, 2, 3, 4, 5 }, secondStream.ToArray());
}
public void TestThrowOnReadFromUnreadableStream() {
MemoryStream memoryStream = new MemoryStream();
TestStream testStream = new TestStream(memoryStream, false, true, true);
ChainStream chainer = new ChainStream(new Stream[] { testStream });
Assert.Throws<NotSupportedException>(
delegate() { chainer.Read(new byte[5], 0, 5); }
);
}
public void TestThrowOnWriteToUnwriteableStream() {
MemoryStream memoryStream = new MemoryStream();
TestStream testStream = new TestStream(memoryStream, true, false, true);
ChainStream chainer = new ChainStream(new Stream[] { testStream });
Assert.Throws<NotSupportedException>(
delegate() { chainer.Write(new byte[] { 1, 2, 3, 4, 5 }, 0, 5); }
);
}
public void TestThrowOnSetPositionWithUnseekableStream() {
MemoryStream memoryStream = new MemoryStream();
TestStream testStream = new TestStream(memoryStream, true, true, false);
ChainStream chainer = new ChainStream(new Stream[] { testStream });
Assert.Throws<NotSupportedException>(
delegate() { chainer.Position = 123; }
);
}
public void TestThrowOnGetLengthWithUnseekableStream() {
MemoryStream memoryStream = new MemoryStream();
TestStream testStream = new TestStream(memoryStream, true, true, false);
ChainStream chainer = new ChainStream(new Stream[] { testStream });
Assert.Throws<NotSupportedException>(
delegate() { Assert.IsTrue(chainer.Length != chainer.Length); }
);
}
public void TestFlush() {
MemoryStream firstStream = new MemoryStream();
TestStream firstTestStream = new TestStream(firstStream, true, true, true);
MemoryStream secondStream = new MemoryStream();
TestStream secondTestStream = new TestStream(secondStream, true, true, true);
ChainStream chainer = new ChainStream(
new Stream[] { firstTestStream, secondTestStream }
);
Assert.AreEqual(0, firstTestStream.FlushCallCount);
Assert.AreEqual(0, secondTestStream.FlushCallCount);
chainer.Flush();
Assert.AreEqual(1, firstTestStream.FlushCallCount);
Assert.AreEqual(1, secondTestStream.FlushCallCount);
}
public void TestReadFromUnseekableStream() {
MemoryStream firstStream = new MemoryStream();
// Now the second stream _does_ support seeking. If the stream chainer ignores
// that, it would overwrite data in the second stream.
MemoryStream secondStream = new MemoryStream();
secondStream.Write(new byte[] { 0, 9, 8, 7, 6 }, 0, 5);
secondStream.Position = 3;
TestStream testStream = new TestStream(firstStream, true, true, false);
ChainStream chainer = new ChainStream(new Stream[] { testStream, secondStream });
Assert.IsFalse(chainer.CanSeek);
byte[] buffer = new byte[5];
int readByteCount = chainer.Read(buffer, 0, 3);
Assert.AreEqual(3, readByteCount);
Assert.AreEqual(new byte[] { 0, 9, 8, 0, 0 }, buffer);
readByteCount = chainer.Read(buffer, 0, 3);
Assert.AreEqual(2, readByteCount);
Assert.AreEqual(new byte[] { 7, 6, 8, 0, 0 }, buffer);
}
