public async Task CopyToStreamAsync_ShouldWorkCorrectly()
{
// Arrange
var bytes1 = Enumerable.Repeat((byte)1, 10).ToArray();
var bytes2 = Enumerable.Repeat((byte)2, 10).ToArray();
var bytes3 = Enumerable.Repeat((byte)3, 10).ToArray();
var memoryByteBuffer1 = new MemoryByteBuffer(bytes1);
var memoryByteBuffer2 = new MemoryByteBuffer(bytes2);
var memoryByteBuffer3 = new MemoryByteBuffer(bytes3);
var compositeByteBuffer = new CompositeByteBuffer(memoryByteBuffer1, memoryByteBuffer2, memoryByteBuffer3);
var expected = bytes1.Concat(bytes2).Concat(bytes3).ToArray();
using var ms = new MemoryStream(new byte[30]);
// Act
await compositeByteBuffer.CopyToStreamAsync(ms, CancellationToken.None);
var actual = ms.ToArray();
// Assert
Assert.Equal(expected.Length, actual.Length);
Assert.Equal(expected, actual);
}