Final commit.

packages/holzleitner_api/test/delivery_credit_test.dart

@@ -0,0 +1,27 @@
+import 'package:test/test.dart';
+import 'package:holzleitner_api/holzleitner_api.dart';
+
+// tests for DeliveryCredit
+void main() {
+  final instance = DeliveryCreditBuilder();
+  // TODO add properties to the builder and call build()
+
+  group(DeliveryCredit, () {
+    // Gutschrift-Betrag in Cent (> 0, ≤ 15000).
+    // int amountCents
+    test('to test the property `amountCents`', () async {
+      // TODO
+    });
+
+    // String deliveryId
+    test('to test the property `deliveryId`', () async {
+      // TODO
+    });
+
+    // String reason
+    test('to test the property `reason`', () async {
+      // TODO
+    });
+
+  });
+}