Function check_length

arrow-string/src/substring.rs:977–981

()

    #[test]
    fn check_length() {
        let array = StringArray::from(vec![Some("E=mc²"), Some("ascii")]);
        let err = substring(&array, 0, Some(5)).unwrap_err().to_string();
        assert!(err.contains("invalid utf-8 boundary"));
    }

    #[test]
    fn non_utf8_bytes() {