$s =~ s/^Content-Disposition:.*$//sm;
is($cls->new($s)->filename, 'vtpm-fakefile.patch',
"filename fallback ($cls)") if $cls ne 'PublicInbox::MIME';
is($cls->new($s)->content_type,
'text/x-patch; name="vtpm-fakefile.patch"',
$s =~ s/^Content-Disposition:.*$//sm;
is($cls->new($s)->filename, 'vtpm-fakefile.patch',
"filename fallback ($cls)") if $cls ne 'PublicInbox::MIME';
is($cls->new($s)->content_type,
'text/x-patch; name="vtpm-fakefile.patch"',