//! Splitting text into the things tally counts.

/// The words of `line`: runs of anything but whitespace.
pub fn words(line: &str) -> usize {
    line.split_whitespace().count()
}

/// The lines of `text`. A last line without a newline still counts, and
/// empty input has none.
pub fn lines(text: &str) -> impl Iterator<Item = &str> {
    text.lines().filter(|_| !text.is_empty())
}

#[cfg(test)]
mod tests {
    #[test]
    fn empty_input_has_no_lines() {
        assert_eq!(super::lines("").count(), 0);
    }
}