refactor(itam): API Fields render Functional Test Suite re-written to Pytest for model OperatingSystem

ref: #925 #922

app/itam/tests/functional/operating_system/test_functional_operating_system_api_fields.py

@@ -0,0 +1,57 @@
+import pytest
+
+# from django.db import models
+
+from rest_framework.relations import Hyperlink
+
+from api.tests.functional.test_functional_api_fields import (
+    APIFieldsInheritedCases,
+)
+
+
+
+@pytest.mark.model_device
+class OperatingSystemAPITestCases(
+    APIFieldsInheritedCases,
+):
+
+
+    @property
+    def parameterized_api_fields(self):
+
+        return {
+            'publisher': {
+                'expected': dict
+            },
+            'publisher.id': {
+                'expected': int
+            },
+            'publisher.display_name': {
+                'expected': str
+            },
+            'publisher.url': {
+                'expected': Hyperlink
+            },
+            'name': {
+                'expected': str
+            },
+            'modified': {
+                'expected': str
+            }
+        }
+
+
+
+class OperatingSystemAPIInheritedCases(
+    OperatingSystemAPITestCases,
+):
+    pass
+
+
+
+@pytest.mark.module_itam
+class OperatingSystemAPIPyTest(
+    OperatingSystemAPITestCases,
+):
+
+    pass