feat(): unit tests for domain entities and basic invariants

tests/unit/test_notification_device_entity.py

@@ -0,0 +1,20 @@
+from datetime import UTC
+from uuid import UUID, uuid4
+
+from template_project.application.notification_device.entity import NotificationDevice
+from template_project.application.user.entity import UserId
+
+
+def test_notification_device_factory_creates_valid_device() -> None:
+    user_id = UserId(uuid4())
+
+    device = NotificationDevice.factory(
+        user_id=user_id,
+        device_id="device_123",
+    )
+
+    assert isinstance(device.id, UUID)
+    assert device.user_id == user_id
+    assert device.device_id == "device_123"
+    assert device.deleted_at is None
+    assert device.created_at.tzinfo == UTC