\documentclass{article}
\usepackage{bidi}
\title{Testing Basic Bidi Direction Change}
\author{Vafa Khalighi}
\begin{document}
\maketitle
In this document we test bidi direction change in \textsf{RTL} and \textsf{LTR}. These tests includes \texttt{flushleft}, \texttt{flushright} environments and \verb|\centerline{...}|, \verb|\leftline{...}|,\verb|\rightline{...}|,\verb|\raggedleft| and \verb|\raggedright| macros.
\section{RTL Test}
\setRTL
\begin{flushleft}
This is left in RTL
\end{flushleft}
\begin{flushright}
This is right in RTL
\end{flushright}
\centerline{This is center in RTL}

\leftline{This is left in RTL}

\rightline{This is right in RTL}

\raggedleft This is raggedleft in RTL

\raggedright This is raggedright in RTL

\setLTR
\section{LTR Test}
\begin{flushleft}
This is left in LTR
\end{flushleft}
\begin{flushright}
This is right in LTR
\end{flushright}
\centerline{This is center in LTR}

\leftline{This is left in LTR}

\rightline{This is right in LTR}

\raggedleft This is raggedleft in LTR

\raggedright This is raggedright in LTR
\end{document}
