\input regression-test.tex
\documentclass{article}
\usepackage{kanban-board}
\begin{document}
\sbox0{\scriptsize $x$}% Load math font sizes outside captured output.
\START
\begingroup
\makeatletter
\year=2026 \month=7 \day=18

\kb@evaloverdue{17.07.2026}
\ifbool{kb@overdue}
  {\TYPE{KANBAN CALENDAR OVERDUE OK}}
  {\TYPE{KANBAN CALENDAR OVERDUE FAILED}}

\kb@evaloverdue{18.07.2026}
\ifbool{kb@duenow}
  {\TYPE{KANBAN CALENDAR CURRENT OK}}
  {\TYPE{KANBAN CALENDAR CURRENT FAILED}}

\kb@evaloverdue{2026-07-17}
\ifbool{kb@overdue}
  {\TYPE{KANBAN ISO CALENDAR OVERDUE OK}}
  {\TYPE{KANBAN ISO CALENDAR OVERDUE FAILED}}

\kb@evaloverdue{2026-07-18}
\ifbool{kb@duenow}
  {\TYPE{KANBAN ISO CALENDAR CURRENT OK}}
  {\TYPE{KANBAN ISO CALENDAR CURRENT FAILED}}

\def\kanban@thestart{18.07.2026}
\kb@evaloverdue{M1}
\ifbool{kb@duenow}
  {\TYPE{KANBAN PROJECT CURRENT OK}}
  {\TYPE{KANBAN PROJECT CURRENT FAILED}}

\kb@evaloverdue{M2}
\ifboolexpr{not bool {kb@overdue} and not bool {kb@duenow}}
  {\TYPE{KANBAN PROJECT FUTURE OK}}
  {\TYPE{KANBAN PROJECT FUTURE FAILED}}

\def\kanban@thestart{2026-07-18}
\kb@evaloverdue{M1}
\ifbool{kb@duenow}
  {\TYPE{KANBAN ISO PROJECT START OK}}
  {\TYPE{KANBAN ISO PROJECT START FAILED}}

\def\kanban@thestart{31.01.2026}
\year=2026 \month=2 \day=27
\kb@evaloverdue{M1}
\ifbool{kb@duenow}
  {\TYPE{KANBAN PROJECT MONTH-END BEFORE BOUNDARY OK}}
  {\TYPE{KANBAN PROJECT MONTH-END BEFORE BOUNDARY FAILED}}
\year=2026 \month=2 \day=28
\kb@evaloverdue{M2}
\ifbool{kb@duenow}
  {\TYPE{KANBAN PROJECT MONTH-END CLAMP OK}}
  {\TYPE{KANBAN PROJECT MONTH-END CLAMP FAILED}}
\year=2028 \month=2 \day=29
\kb@evaloverdue{M26}
\ifbool{kb@duenow}
  {\TYPE{KANBAN PROJECT LEAP BOUNDARY OK}}
  {\TYPE{KANBAN PROJECT LEAP BOUNDARY FAILED}}
\makeatother
\endgroup
\END
\end{document}