+#!/usr/bin/perl
+use warnings;
+use strict;
+use Test::More tests => 10;
+
+BEGIN { use_ok("IkiWiki"); }
+
+# note: yesno always accepts English even if localized.
+# So no need to bother setting locale to C.
+
+ok(IkiWiki::yesno("yes") == 1);
+ok(IkiWiki::yesno("Yes") == 1);
+ok(IkiWiki::yesno("YES") == 1);
+
+ok(IkiWiki::yesno("no") == 0);
+ok(IkiWiki::yesno("No") == 0);
+ok(IkiWiki::yesno("NO") == 0);
+
+ok(IkiWiki::yesno("1") == 1);
+ok(IkiWiki::yesno("0") == 0);
+ok(IkiWiki::yesno("mooooooooooo") == 0);