[#32] Tests: Add PaymentVariantSummaryTest

Tests/Resources/Sql/DocumentInsert.sql

@@ -63,5 +63,9 @@ INSERT INTO delivery_part_bucket (year, did, dpnr, bktnr, discr, value) VALUES
 INSERT INTO payment_variant (year, avnr, name, date, transfer_date, test_variant, calc_time, comment, data) VALUES
 (2020, 1, 'Probevariante', '2021-01-15', '2021-01-15', TRUE, NULL, NULL, '{}');
 
+INSERT INTO payment_delivery_part_bucket (year, did, dpnr, bktnr, avnr, price, amount) VALUES
+(2020, 1, 1, 0, 1, 5000, 16095000);
+DELETE FROM payment_member;
+
 INSERT INTO payment_member (year, avnr, mgnr, net_amount) VALUES
 (2020, 1, 101, 10000000);