+{
+ my $tickets = RT::Tickets->new(RT->SystemUser);
+ $tickets->LimitCustomField(
+ CUSTOMFIELD => $cf->id,
+ OPERATOR => 'IS',
+ VALUE => 'NULL',
+ );
+
+ is( $tickets->Count, 0, 'did not find the ticket with date IS NULL' );
+}
+
+{
+ my $tickets = RT::Tickets->new(RT->SystemUser);
+ $tickets->LimitCustomField(
+ CUSTOMFIELD => $cf->id,
+ OPERATOR => 'IS NOT',
+ VALUE => 'NULL',
+ );
+
+ is( $tickets->Count, 2, 'did find the ticket with date IS NOT NULL' );
+}
+
+