+
+ my %lg;
+ foreach my $num (@{$n->listgroup($group)}) {
+ is($lg{$num}++, 0, "num is unique in LISTGROUP");
+ }
+ is_deeply([sort keys %lg], [sort keys %$x],
+ 'XOVER and LISTGROUPS return the same article numbers');
+
+ my $xref = $n->xhdr('Xref', '1-');
+ is_deeply([sort keys %lg], [sort keys %$xref], 'Xref range OK');
+
+ my $mids = $n->xhdr('Message-ID', '1-');
+ is_deeply([sort keys %lg], [sort keys %$xref], 'Message-ID range OK');
+
+ my $rover = $n->xrover('1-');
+ is_deeply([sort keys %lg], [sort keys %$rover], 'XROVER range OK');