public async Task ArrayPoolUsedByDefault()
{
WriteByteArray(20);
var reader = new StreamPipeReader(Stream);
var result = await reader.ReadAsync();
SequenceMarshal.TryGetReadOnlySequenceSegment(
result.Buffer,
out var startSegment,
out var startIndex,
out var endSegment,
out var endIndex);
var start = (BufferSegment)startSegment;
var end = (BufferSegment)endSegment;
Assert.Same(start, end);
Assert.IsType <byte[]>(start.MemoryOwner);
reader.AdvanceTo(result.Buffer.End);
reader.Complete();
}