%% test-overflow.tex
%% =================
%% Overflow test with the default layout of the standard Japanese
%% classes.  The class is given by \CLS (default: jbook):
%%
%%   platex   -jobname=test-overflow-jbook   "\def\CLS{jbook}\input test-overflow.tex"
%%   uplatex  -jobname=test-overflow-ujbook  "\def\CLS{ujbook}\input test-overflow.tex"
%%   lualatex -jobname=test-overflow-ltjbook "\def\CLS{ltjbook}\input test-overflow.tex"
%%   (also jsbook on (u)platex, ltjsbook on lualatex)
%%
%% What to check:
%%   * jbook, ujbook, ltjbook: \textwidth is 327pt (as in the standard
%%     book class), which is not a multiple of 1zw, and \textheight is
%%     truncated to whole points by \@settopoint; so there is an
%%     overflow both along and across the lines (SHG-EXPECT OK), drawn
%%     in magenta in the PDF.
%%   * jsbook, ltjsbook: \textwidth is a multiple of 1zw (no overflow
%%     along the lines).
%%   * SHG-POS OK on pages 1 and 2.
\ifdefined\CLS\else\def\CLS{jbook}\fi
\documentclass{\CLS}
\usepackage{showhanmengrid}
\input{test-common}
\makeatletter
\@expandtwoargs\in@{,\CLS,}{,jsbook,ltjsbook,}
\ifin@
  \SHGexpect{yoko}{40}{42}{zero}{any}
\else
  \SHGexpect{yoko}{33}{39}{positive}{positive}
\fi
\makeatother
\begin{document}
\noindent\SHGmark\SHGtext\SHGtext\SHGtext
\newpage
\noindent\SHGmark\SHGtext\SHGtext\SHGtext
\end{document}