public void Stream()
{
var array = new byte[] { 1, 2, 3 };
using (var stream = new MemoryStream(array))
{
Assert.False(FileStreamReadLightUp.IsFileStream(stream));
using (var provider = new StreamMemoryBlockProvider(stream, 0, array.Length, isFileStream: false, leaveOpen: true))
{
using (var block = provider.GetMemoryBlock())
{
Assert.IsType<NativeHeapMemoryBlock>(block);
Assert.Equal(3, block.Size);
AssertEx.Equal(array, block.GetContent());
}
Assert.Equal(3, stream.Position);
using (var block = provider.GetMemoryBlock(1, 2))
{
Assert.IsType<NativeHeapMemoryBlock>(block);
Assert.Equal(2, block.Size);
AssertEx.Equal(new byte[] { 2, 3 }, block.GetContent());
}
Assert.Equal(3, stream.Position);
}
using (var provider = new StreamMemoryBlockProvider(stream, 0, array.Length, isFileStream: false, leaveOpen: false))
{
using (var block = provider.GetMemoryBlock())
{
Assert.IsType<NativeHeapMemoryBlock>(block);
Assert.Equal(3, block.Size);
AssertEx.Equal(array, block.GetContent());
}
Assert.Equal(3, stream.Position);
}
Assert.Throws<ObjectDisposedException>(() => stream.Position);
}
}
public void FileStream()
{
string filePath = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
try
{
var array = new byte[StreamMemoryBlockProvider.MemoryMapThreshold + 1];
for (int i = 0; i < array.Length; i++)
{
array[i] = 0x12;
}
File.WriteAllBytes(filePath, array);
foreach (bool useAsync in new[] { true, false })
{
using (var stream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read, 4096, useAsync))
{
Assert.True(FileStreamReadLightUp.IsFileStream(stream));
using (var provider = new StreamMemoryBlockProvider(stream, imageStart: 0, imageSize: array.Length, isFileStream: true, leaveOpen: false))
{
// large:
using (var block = provider.GetMemoryBlock())
{
Assert.IsType<MemoryMappedFileBlock>(block);
Assert.Equal(array.Length, block.Size);
AssertEx.Equal(array, block.GetContent());
}
// we didn't use the stream for reading
Assert.Equal(0, stream.Position);
// small:
using (var block = provider.GetMemoryBlock(1, 2))
{
Assert.IsType<NativeHeapMemoryBlock>(block);
Assert.Equal(2, block.Size);
AssertEx.Equal(new byte[] { 0x12, 0x12 }, block.GetContent());
}
Assert.Equal(3, stream.Position);
}
Assert.Throws<ObjectDisposedException>(() => stream.Position);
}
}
}
finally
{
File.Delete(filePath);
}
}