tests: add TestSerializerPartialUsage.test_partial_dictfield

tests/test_serializer_lists.py

@@ -294,7 +294,7 @@ class TestListSerializerClass:
 
 class TestSerializerPartialUsage:
     """
-    When not submitting key for list fields or multiple choice, partial
+    When not submitting keys for list, dict or multiple choice fields, partial
     serialization should result in an empty state (key not there), not
     an empty list.
 
@@ -320,6 +320,16 @@ class TestSerializerPartialUsage:
         assert serializer.validated_data == {}
         assert serializer.errors == {}
 
+    def test_partial_dictfield(self):
+        class DictFieldSerializer(serializers.Serializer):
+            data = serializers.DictField()
+        serializer = DictFieldSerializer(data=MultiValueDict(), partial=True)
+        result = serializer.to_internal_value(data={})
+        assert "data" not in result
+        assert serializer.is_valid()
+        assert serializer.validated_data == {}
+        assert serializer.errors == {}
+
     def test_allow_empty_true(self):
         class ListSerializer(serializers.Serializer):
             update_field = serializers.IntegerField()