Function error_pre_visit

datafusion/expr/src/logical_plan/plan.rs:4838–4858

()

    #[test]
    fn error_pre_visit() {
        let mut visitor = ErrorVisitor {
            return_error_from_pre_in: OptionalCounter::new(2),
            ..Default::default()
        };
        let plan = test_plan();
        let res = plan.visit_with_subqueries(&mut visitor).unwrap_err();
        assert_snapshot!(
            res.strip_backtrace(),
            @"This feature is not implemented: Error in pre_visit"
        );
        assert_debug_snapshot!(
            visitor.inner.strings,
            @r#"
        [
            "pre_visit Projection",
            "pre_visit Filter",
        ]
        "#
        );
    }

    #[test]
    fn error_post_visit() {