handling "0/0" scores for the LMS

lib/WeBWorK/Utils/Sets.pm

@@ -245,25 +245,37 @@ sub get_LTISendScoresAfterDate ($set, $ce) {
 # Checks if the set is past the LTISendScoresAfterDate or has met the LTISendGradesEarlyThreshold.
 # Returns a reference to hash with keys totalRight, total, score, criticalDate if the set has met
 # either condition and undef if not.
+# If the set is a test, the score "0/0" is treated as 0.
+# If the set is not a test, the score "0/0" is treated as 0 if we have not yet reached the
+# LTISendScoresAfterDate and have not attempted the set. Otherwise, "0/0" is treated as 1.
 sub can_submit_LMS_score ($db, $ce, $userID, $userSet) {
 	my $totalRight;
 	my $total;
-	if ($userSet->assignment_type() =~ /gateway/) {
+	if ($userSet->assignment_type =~ /gateway/) {
 		($totalRight, $total) = grade_gateway($db, $userSet->set_id, $userID);
 	} else {
 		($totalRight, $total) = (grade_set($db, $userSet, $userID))[ 0, 1 ];
 	}
+
 	my $score  = $total ? $totalRight / $total : 0;
 	my $return = { totalRight => $totalRight, total => $total, score => $score };
 
 	if ($ce->{LTISendScoresAfterDate} ne 'never') {
 		my $critical_date;
-		if ($userSet->assignment_type() =~ /gateway/) {
+		if ($userSet->assignment_type =~ /gateway/) {
 			$critical_date = earliest_gateway_date($db, $ce, $userSet);
 		} else {
 			$critical_date = get_LTISendScoresAfterDate($userSet, $ce);
 		}
 		$return->{criticalDate} = $critical_date;
+		if ($total == 0) {
+			$score = (
+				$userSet->assignment_type =~ /gateway/
+					|| ($ce->{LTISendScoresAfterDate} eq 'never'
+						|| before($critical_date) && !set_attempted($db, $userID, $userSet))
+			) ? 0 : 1;
+
+		}
 		return $return if after($critical_date);
 	}