Function buffer_require_non_empty_err

src/buffer/inner.rs:301–308

()

    #[test]
    fn buffer_require_non_empty_err() {
        let buf = Buffer::empty_f64();
        let err = buf.require_non_empty("sum").unwrap_err();
        assert_eq!(
            err,
            ParsecError::EmptyCollection("cannot sum empty buffer".into())
        );
    }
}