def test_visit_select_should_not_call_visits_for_null_values(self):
converter = StatementToPlanConvertor()
converter.visit_table_ref = MagicMock()
converter._visit_projection = MagicMock()
converter._visit_select_predicate = MagicMock()
converter._visit_union = MagicMock()
statement = SelectStatement()
converter.visit_select(statement)
converter.visit_table_ref.assert_not_called()
converter._visit_projection.assert_not_called()
converter._visit_select_predicate.assert_not_called()
def test_visit_select_should_call_appropriate_visit_methods(self):
converter = StatementToPlanConvertor()
converter.visit_table_ref = MagicMock()
converter._visit_projection = MagicMock()
converter._visit_select_predicate = MagicMock()
converter._visit_union = MagicMock()
statement = MagicMock()
statement.from_table = MagicMock(spec=TableRef)
converter.visit_select(statement)
converter.visit_table_ref.assert_called_with(statement.from_table)
converter._visit_projection.assert_called_with(statement.target_list)
converter._visit_select_predicate.assert_called_with(
statement.where_clause)
