public void fill_copies_data_to_buffer()
{
var actual = new byte[10];
var expected = new byte[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
using(var inner = new MemoryStream(expected))
{
var @delegate = new MessageStreamDelegate(inner);
Assert.True(@delegate.Fill(actual, 0, actual.Length));
Assert.Equal(expected, actual);
}
}