I wonder how to draw a horizontal line of some specified length. MWE is given below. Any help will be highly appreciated. Thanks
\documentclass[border=5mm]{standalone}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\node (a) at (0, 0) {Test \hrulefill{}};
\end{tikzpicture}
\end{document}
\draw (start coordinate) -- (x length, y length)
?\rule{thickness}{width}
, for nontikz
...\draw(start)--+(length,0);