Add an e2e test for inferring None values as NULL/VOID

Signed-off-by: Jesse Whitehouse <jesse.whitehouse@databricks.com>

Author: Jesse Whitehouse

tests/e2e/common/parameterized_query_tests.py

@@ -79,6 +79,12 @@ def test_primitive_inferred_decimal(self):
         result = self._get_one_result(self.QUERY, params)
         assert result.col == Decimal("1234.56")
 
+    def test_dbsqlparam_inferred_none(self):
+
+        params = [DbSqlParameter(name="p", value=None, type=None)]
+        result = self._get_one_result(self.QUERY, params)
+        assert result.col == None
+
     def test_dbsqlparam_inferred_bool(self):
 
         params = [DbSqlParameter(name="p", value=True, type=None)]