public static async Task UnsupportedMethods()
{
await using var writer = new FileBufferingWriter();
True(writer.CanWrite);
False(writer.CanRead);
False(writer.CanSeek);
False(writer.CanTimeout);
Throws <NotSupportedException>(() => writer.ReadByte());
Throws <NotSupportedException>(() => writer.Position);
Throws <NotSupportedException>(() => writer.Position = 42L);
Throws <NotSupportedException>(() => writer.SetLength(42L));
Throws <NotSupportedException>(() => writer.Seek(0L, default));
Throws <NotSupportedException>(() => writer.Read(new Span <byte>()));
Throws <NotSupportedException>(() => writer.Read(new byte[10], 0, 10));
Throws <NotSupportedException>(() => writer.BeginRead(new byte[10], 0, 10, null, null));
Throws <InvalidOperationException>(() => writer.EndRead(Task.CompletedTask));
await ThrowsAsync <NotSupportedException>(() => writer.ReadAsync(new byte[10], 0, 10));
await ThrowsAsync <NotSupportedException>(writer.ReadAsync(new byte[10], CancellationToken.None).AsTask);
}