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)? – Guilherme Zanotelli Dec 15 '16 at 18:13\rule{thickness}{width}, for nontikz... – Guilherme Zanotelli Dec 15 '16 at 18:21\draw(start)--+(length,0);– Symbol 1 Dec 15 '16 at 18:22\hrulefill(which doesn't take an argument, by the way) to do something here, is that your question? – Torbjørn T. Dec 17 '16 at 18:20