#100 bring coverage back to 100%

cast/filters.py

@@ -19,7 +19,7 @@
 from django.utils.safestring import SafeText, mark_safe
 from django.utils.translation import gettext as _
 from django_filters.fields import ChoiceField as FilterChoiceField
-from wagtail.models import PageQuerySet
+from wagtail.models import Page, PageQuerySet
 
 from cast import appsettings
 from cast.models.pages import PostTag
@@ -328,9 +328,11 @@ def __init__(
         *,
         fetch_facet_counts: bool = False,
     ):
-        super().__init__(data=data, queryset=queryset)
         if data is None:
             data = QueryDict("")
+        if queryset is None:
+            queryset = Page.objects.none()
+        super().__init__(data=data, queryset=queryset)
         # Remove filters which are not configured in the settings
         configured_filters = set(appsettings.CAST_FILTERSET_FACETS)
         for filter_name in self.filters.copy().keys():

tests/filter_test.py

@@ -98,6 +98,14 @@ def test_only_filter_specified_fields(field_name, facet_count_key):
 
 @pytest.mark.django_db
 class TestPostFilterset:
+    def test_data_is_none(self):
+        filterset = PostFilterset(None)
+        assert filterset.data == QueryDict("")
+
+    def test_queryset_is_none(self):
+        filterset = PostFilterset(None, queryset=None)
+        assert filterset.qs.count() == 0
+
     def test_no_posts_no_date_facets(self):
         # given a filterset with no posts
         queryset = Post.objects.none()