\starttext

\def\TestLookup#1%
  {pattern: #1, found: \dolookupnoffound
   \blank
   \dolookupfontbyspec{#1}
   \dorecurse {\dolookupnoffound} {%
     \recurselevel:~\dolookupgetkeyofindex{fontname}{\recurselevel}\quad
   }%
   \blank}

\TestLookup{familyname=helveticaneue}
\TestLookup{familyname=helveticaneue,weight=bold}
\TestLookup{familyname=helveticaneue,weight=bold,style=italic}

\stoptext
