/// Converts a fractional relevance score into a whole-number percentage for
/// the row's badge, rounding rather than truncating so e.g. 0.995 shows 100%
/// instead of 99%.
pub fn score_percent(final_score: Option<f32>) -> Option<i32> {
    final_score.map(|s| (s * 100.0).round() as i32)
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn no_score_yields_no_percent() {
        assert_eq!(score_percent(None), None);
    }

    #[test]
    fn score_is_rounded_not_truncated() {
        assert_eq!(score_percent(Some(0.995)), Some(100));
        assert_eq!(score_percent(Some(0.554)), Some(55));
    }

    #[test]
    fn score_is_scaled_to_a_percentage() {
        assert_eq!(score_percent(Some(0.5)), Some(50));
        assert_eq!(score_percent(Some(0.0)), Some(0));
        assert_eq!(score_percent(Some(1.0)), Some(100));
    }
}