public void TryChangingPositionCombinedWithWritingAndReading()
{
DataStreamReadableWritable dataStream = TestCollaboratorsFactory.CreateEmptyDataStream();
byte[] bytes = ByteBufferFactory.CreateByteBufferWithAllBytesSet(123, 123);
dataStream.Write(bytes, 0, bytes.Length);
dataStream.SetPosition(0);
byte[] bytes2 = ByteBufferFactory.CreateByteBufferWithAllBytesSet(14, 77);
dataStream.Write(bytes2, 0, bytes2.Length);
var bytesRead = new byte[dataStream.Length];
dataStream.SetPosition(0);
dataStream.Read(bytesRead, 0, dataStream.Length);
for (int i = 0; i < dataStream.Length; i++)
{
if (i <= 13)
{
Assert.AreEqual(77, bytesRead[i]);
}
else
{
Assert.AreEqual(123, bytesRead[i]);
}
}
}
public void MakeSureReadDoesNotThrowIfReadingBeyondTheStream()
{
DataStreamReadableWritable dataStream = TestCollaboratorsFactory.CreateEmptyDataStream();
byte[] bytes = ByteBufferFactory.CreateByteBufferWithAllBytesSet(55000, 123);
dataStream.Write(bytes, 0, bytes.Length);
dataStream.SetPosition(55000 - 35);
var largeArray = new byte[2000];
Assert.AreEqual(35, dataStream.Read(largeArray, 0, 2000));
}
public void MakeSureShrinkingFreesDiskSpace()
{
var testCollaborators = TestCollaboratorsFactory.CreateCollaboratorsForTestingDataStreams();
DataStreamReadableWritable dataStream =
testCollaborators.VirtualFileSystem.OpenFileForWriting(testCollaborators.FileInfo.FullPath);
int valueCloseToDiskSize = (int)testCollaborators.Disk.DiskSizeInBytes - 25 * testCollaborators.Disk.BlockSizeInBytes;
dataStream.SetLength(valueCloseToDiskSize);
var fileSystem = testCollaborators.VirtualFileSystem;
FileInfo newFileNode = fileSystem.CreateFile(@"\testFile2");
DataStreamReadableWritable newFileNodeStream = fileSystem.OpenFileForWriting(newFileNode.FullPath);
ExceptionAssert.MakeSureExceptionIsRaisedBy <InsufficientSpaceException>(
delegate
{
newFileNodeStream.SetLength(valueCloseToDiskSize);
});
dataStream.SetLength(0);
newFileNodeStream.SetLength(valueCloseToDiskSize);
dataStream.SetPosition(0);
const int answeringToAllQuestionsByte = 42;
byte[] bytesToWrite = ByteBufferFactory.CreateByteBufferWithAllBytesSet(valueCloseToDiskSize, answeringToAllQuestionsByte);
newFileNodeStream.Write(bytesToWrite, 0, bytesToWrite.Length);
newFileNodeStream.SetPosition(0);
var buffer = new byte[valueCloseToDiskSize];
newFileNodeStream.Read(buffer, 0, buffer.Length);
MakeSureEachByteInArrayIsRight(buffer, answeringToAllQuestionsByte);
}