Introduce BaseFilterSetTests to standardize testing of PK filters

netbox/utilities/testing/__init__.py

@@ -1,4 +1,5 @@
 from .api import *
 from .base import *
+from .filtersets import *
 from .utils import *
 from .views import *

netbox/utilities/testing/filtersets.py

@@ -0,0 +1,16 @@
+__all__ = (
+    'BaseFilterSetTests',
+)
+
+
+class BaseFilterSetTests:
+    queryset = None
+    filterset = None
+
+    def test_id(self):
+        """
+        Test filtering for two PKs from a set of >2 objects.
+        """
+        params = {'id': self.queryset.values_list('pk', flat=True)[:2]}
+        self.assertGreater(self.queryset.count(), 2)
+        self.assertEqual(self.filterset(params, self.queryset).qs.count(), 2)