\input regression-test.tex
\DocumentMetadata{tagging=on,lang=en-US}
\documentclass{article}
\usepackage{tagdirtree}
\begin{document}
\START
% Tagging active, but no tree comparison: any tagpdf error or warning
% about the structure shows up in the log.
% Without the probe the test would also pass where \DocumentMetadata does
% not understand tagging=on and the document is silently left untagged.
\ExplSyntaxOn
\TYPE{tagging~active:~\tag_if_active:TF{yes}{no}}
\ExplSyntaxOff

\begin{tagdirtree}
  \dtdir{project}{root directory}{
    \dtdir{src}{}{
      \dtfile{main.py}{entry point}
    }
    \dtarchive{data.zip}{raw data}
    \dtfile{README.md}{}
  }
\end{tagdirtree}

\TYPE{depth after tree: \tagdirtreedepth}
\TYPE{done}
\END