public void InvertsStream(Mode mode, int bufferSize, string expected)
{
// Arrange
Func <byte[], IEnumerable <byte> > map;
switch (mode)
{
case Mode.Reduce:
map = bytes => bytes.Where((b, i) => i % 4 == 0);
break;
case Mode.Expand:
map = bytes => bytes.Concat(new[] { UnderscoreByte });
break;
case Mode.Replace:
map = bytes => bytes.Select(b => UnderscoreByte);
break;
case Mode.Identity:
map = bytes => bytes;
break;
default:
throw new NotSupportedException($"The mode '{mode}' is not supported.");
}
var source = new MemoryStream(Encoding.ASCII.GetBytes("These are the source bytes!"));
var inverted = new InvertedStream(source, buffer => new MapStream(buffer, map));
var destination = new MemoryStream();
// Act
using (inverted)
{
inverted.CopyTo(destination, bufferSize);
}
// Assert
var actual = Encoding.ASCII.GetString(destination.ToArray());
actual.Should().Be(expected);
}
public async Task SetAsync(string key, Stream stream, CancellationToken cancellationToken)
{
var compressionStream = new InvertedStream(stream, b => new GZipStream(b, _compressionLevel));
await _innerStore.SetAsync(key, compressionStream, cancellationToken).ConfigureAwait(false);
}