\input regression-test.tex
\documentclass{article}
\begin{document}
\START
\directlua{
  local tagpax = require("tagpax")
  local ir = tagpax.read("sample-ir.tagpax")
  local ok, errors = tagpax.validate(ir)
  local node_count = 0
  for _ in pairs(ir.nodes) do
    node_count = node_count + 1
  end
  local function report(message)
    texio.write_nl("log", message)
  end
  report("valid=" .. tostring(ok))
  report("nodes=" .. tostring(node_count))
  report("kids=" .. tostring(rawlen(ir.kids)))
  report("headings=" .. tostring(rawlen(ir.headings)))
  for _, message in ipairs(errors) do
    report("error=" .. message)
  end
}
\END
\end{document}