Function test_coalesce_all_null

graphlite/src/functions/null_functions.rs:227–237

()

    #[test]
    fn test_coalesce_all_null() {
        let func = CoalesceFunction::new();
        let context = FunctionContext::new(
            vec![],
            HashMap::new(),
            vec![Value::Null, Value::Null, Value::Null],
        );

        let result = func.execute(&context).unwrap();
        assert!(result.is_null());
    }

    #[test]
    fn test_coalesce_single_argument() {