\documentclass{article}

\usepackage{fontspec}
\usepackage{luaotfload}
\usepackage{tikz}
\usepackage{graphicx}
\usepackage{float}

\usepackage{sunpath}

\usetikzlibrary{hobby} % this library let one connect points to curve.

\newcommand{\TikZ}{Ti\textit{k}Z}

\title{
  \textsf{sunpath} -- Draw Sun Path\\
  (Test Compatibility only)
}%
%
\author{%
 Hồng-Phúc Bùi% 
}



\begin{document}
%
\parindent0pt
%
\maketitle
\tableofcontents

\section{Object}

This file tests if this package can be used within a \texttt{article} class.

\input{sunpath.docpart.tex}

\end{document}