%% test-breakable.tex
%% ==================
%% Typesetting test for breakable boxes with "page footnote".
%%
%%   pdflatex test-breakable.tex   (or xelatex / lualatex)
%%   platex  test-breakable.tex && dvipdfmx test-breakable
%%   uplatex -jobname=test-breakable "\def\CLS{ujarticle}\input test-breakable"
%%
%% What is covered:
%%   * a box broken across pages by \tcbbreak: the footnote texts of
%%     all its parts are put on the page where the box ends, and the
%%     package warns once;
%%   * a breakable box that is not broken, and an unbreakable box after
%%     the broken one: no warning.
%%
%% What to check:
%%   * TPF-RESULT OK, and exactly one tcbpagefootnote warning
%%     ("This box is broken across pages").
\ifdefined\CLS\else\def\CLS{article}\fi
\ifdefined\ptexversion\def\CLSOPT{dvipdfmx}\else\def\CLSOPT{}\fi
\expandafter\documentclass\expandafter[\CLSOPT]{\CLS}
\usepackage{tcbpagefootnote}
\tcbuselibrary{breakable}
\input{test-common}
\begin{document}
\section*{Breakable boxes}

\begin{tcolorbox}[breakable, page footnote]
A breakable box that is not broken\TPFfootnote{A footnote of the
  unbroken box.}.
\end{tcolorbox}

\begin{tcolorbox}[breakable, page footnote]
The first part of a broken box\TPFfootnote[later]{A footnote of the
  first part.}.
\tcbbreak
The second part of the box\TPFfootnote{A footnote of the second part.}.
\end{tcolorbox}

\begin{tcolorbox}[page footnote]
An unbreakable box after the broken one\TPFfootnote{A footnote of the
  unbreakable box.}.
\end{tcolorbox}

\TPFcounter{footnote}{4}
\end{document}