test(itam): Add missing unit tests for Device Model viewset

ref: #512 #513 #518

app/itam/tests/unit/device_model/test_unit_device_model_viewset.py

@@ -0,0 +1,67 @@
+import pytest
+
+from django.contrib.auth.models import User
+from django.test import Client, TestCase
+
+from rest_framework.reverse import reverse
+
+from access.models import Organization
+from api.tests.abstract.viewsets import ViewSetModel
+
+from itam.viewsets.device_model import ViewSet
+
+
+
+class ViewsetCommon(
+    ViewSetModel,
+):
+
+    viewset = ViewSet
+
+    route_name = 'v2:_api_v2_device_model'
+
+    @classmethod
+    def setUpTestData(self):
+        """Setup Test
+
+        1. Create an organization
+        3. create super user
+        """
+
+        organization = Organization.objects.create(name='test_org')
+
+        self.organization = organization
+
+        self.view_user = User.objects.create_user(username="test_view_user", password="password", is_superuser=True)
+
+        self.kwargs = {}
+
+
+
+class DeviceModelViewsetList(
+    ViewsetCommon,
+    TestCase,
+):
+
+
+    @classmethod
+    def setUpTestData(self):
+        """Setup Test
+
+        1. make list request
+        """
+
+
+        super().setUpTestData()
+
+
+        client = Client()
+        
+        url = reverse(
+            self.route_name + '-list',
+            kwargs = self.kwargs
+        )
+
+        client.force_login(self.view_user)
+
+        self.http_options_response_list = client.options(url)