public void Test_ArrayPoolBufferWriterOfT_AllocateAndGetMemoryAndSpan()
{
var writer = new ArrayPoolBufferWriter <byte>();
Assert.AreEqual(writer.Capacity, 256);
Assert.AreEqual(writer.FreeCapacity, 256);
Assert.AreEqual(writer.WrittenCount, 0);
Assert.IsTrue(writer.WrittenMemory.IsEmpty);
Assert.IsTrue(writer.WrittenSpan.IsEmpty);
Span <byte> span = writer.GetSpan(43);
Assert.IsTrue(span.Length >= 43);
writer.Advance(43);
Assert.AreEqual(writer.Capacity, 256);
Assert.AreEqual(writer.FreeCapacity, 256 - 43);
Assert.AreEqual(writer.WrittenCount, 43);
Assert.AreEqual(writer.WrittenMemory.Length, 43);
Assert.AreEqual(writer.WrittenSpan.Length, 43);
Assert.ThrowsException <ArgumentOutOfRangeException>(() => writer.Advance(-1));
Assert.ThrowsException <ArgumentOutOfRangeException>(() => writer.GetMemory(-1));
Assert.ThrowsException <ArgumentException>(() => writer.Advance(1024));
writer.Dispose();
Assert.ThrowsException <ObjectDisposedException>(() => writer.WrittenMemory);
Assert.ThrowsException <ObjectDisposedException>(() => writer.WrittenSpan.Length);
Assert.ThrowsException <ObjectDisposedException>(() => writer.Capacity);
Assert.ThrowsException <ObjectDisposedException>(() => writer.FreeCapacity);
Assert.ThrowsException <ObjectDisposedException>(() => writer.Clear());
Assert.ThrowsException <ObjectDisposedException>(() => writer.Advance(1));
}
private async Task BufferFromStreamAsync(Stream stream, ArrayPoolBufferWriter <byte> buf, int length, CancellationToken token)
{
WriteHeader(buf, length);
Memory <byte> mem = buf.GetMemory(length).Slice(0, length);
int totRead = await stream.ReadAsync(mem, token).ConfigureAwait(false);
token.ThrowIfCancellationRequested();
if (totRead != length)
{
throw new StreamSerializationException($"Unexpected length read while deserializing body. Expected {length}, got {totRead}");
}
buf.Advance(length);
}