\documentclass{scrartcl}

\setcounter{secnumdepth}{2}

\begin{document}
This test document is created to test advanced TOC functionality.

\section{Test section 1}

\subsection{Test sub section 1}

\section{$\alpha$}

\input{sec2.tex}

\appendix

\input{sec3}

\bibliography{test}

\printbibliography{Testing}

\printbibliography[Some option]{Testing}

\printbibheading{Testing}

\printbibheading[Some option]{Testing}

\begin{thebibliography}
\end{thebibliography}

\end{document}