\input{regression-test}
\documentclass{article}
\usepackage[review,compat=changes]{texchanges}
\begin{document}
\START

\TEST{changes~compatibility~surface~is~defined}{
  \def\CHECK#1{\TYPE{#1:
    \ifcsname#1\endcsname defined\else MISSING\fi}}
  \CHECK{added}\CHECK{deleted}\CHECK{replaced}
  \CHECK{highlight}\CHECK{comment}
  \CHECK{definechangesauthor}\CHECK{listofchanges}
  \CHECK{setaddedmarkup}\CHECK{setdeletedmarkup}
  \CHECK{sethighlightmarkup}\CHECK{setcommentmarkup}
  \CHECK{setauthormarkup}\CHECK{setanonymousname}
  \CHECK{settruncatewidth}\CHECK{setsummarywidth}
  \CHECK{setlocextension}\CHECK{setsocextension}
  \CHECK{txcompatadded}\CHECK{txcompatreplaced}
}

\TEST{native~replace~keeps~old~then~new}{
  \txreplace[id=N1]{OLDNATIVE}{NEWNATIVE}
}

\TEST{compat~replaced~takes~new~then~old}{
  \replaced[changeid=C1]{NEWCOMPAT}{OLDCOMPAT}
}
\END