feat: added advertiser and campaign apps

solution/services/backend/apps/advertiser/tests/test_advertiser_model.py

@@ -0,0 +1,48 @@
+from uuid import uuid4
+from django.test import TestCase, override_settings
+from django.core.cache import cache
+from apps.advertiser.models import Advertiser
+from apps.campaign.models import Campaign
+
+
+class AdvertiserModelTest(TestCase):
+    def setUp(self) -> None:
+        self.advertiser = Advertiser.objects.create(name="Test Advertiser")
+
+    def test_advertiser_creation(self):
+        self.assertIsInstance(self.advertiser, Advertiser)
+        self.assertEqual(self.advertiser.name, "Test Advertiser")
+
+    def test_advertiser_str_method(self):
+        self.assertEqual(str(self.advertiser), "Test Advertiser")
+
+    def test_advertiser_id_property(self):
+        self.assertEqual(self.advertiser.advertiser_id, self.advertiser.id)
+
+        new_id = uuid4()
+        self.advertiser.advertiser_id = new_id
+        self.assertEqual(self.advertiser.id, new_id)
+
+    @override_settings(
+        CACHES={
+            "default": {
+                "BACKEND": "django.core.cache.backends.locmem.LocMemCache",
+            }
+        }
+    )
+    def test_advertiser_campaigns_relationship(self):
+        loll = cache.get("current_date", 0)
+
+        campaign = Campaign.objects.create(
+            advertiser=self.advertiser,
+            impressions_limit=0,
+            clicks_limit=0,
+            cost_per_impression=0,
+            cost_per_click=0,
+            ad_title="title",
+            ad_text="text",
+            start_date=15,
+            end_date=16,
+        )
+
+        self.assertIn(campaign, self.advertiser.campaigns.all())