prvi kod za live uporabu

backend/modules/invoicing/tests/test_utils.py

@@ -0,0 +1,28 @@
+from django.test import TestCase
+from datetime import date
+from decimal import Decimal
+
+from django.contrib.auth import get_user_model
+from modules.invoicing.models import Invoice
+from modules.invoicing.utils import generate_invoice_number
+from modules.crm.models import Client
+
+
+class UtilsTests(TestCase):
+    def setUp(self):
+        User = get_user_model()
+        self.user = User.objects.create_user(username="creator", email="c@example.com", password="pass")
+        self.client = Client.objects.create(name="Client Utils")
+
+    def test_generate_invoice_number_increments(self):
+        year = date.today().year
+        Invoice.objects.create(
+            invoice_number=f"INV-{year}-0001",
+            creator=self.user,
+            client=self.client,
+            amount=Decimal("1.00"),
+            due_date=date.today()
+        )
+        next_num = generate_invoice_number()
+        # očekujemo INV-<year>-0002
+        self.assertTrue(next_num.endswith("-0002"))