use crate::units::{Error as UnitError, Raw, Result as UnitResult};
use std::borrow::Cow;
use uom::si::frequency::hertz as Hertz;
pub type Frequency = uom::si::frequency::Frequency<uom::si::SI<f64>, f64>;
impl Raw for Frequency {
fn from_raw(raw: &str) -> UnitResult<Self> {
raw.trim()
.parse::<f64>()
.map(Frequency::new::<Hertz>)
.map_err(UnitError::parsing_float)
}
fn to_raw(&self) -> Cow<'_, str> {
Cow::Owned(format!("{:.0}", self.get::<Hertz>().round()))
}
}
#[cfg(test)]
mod tests {
use super::Hertz;
use crate::units::{Frequency, Raw};
#[test]
fn test_from_raw() {
let av = Frequency::from_raw("200").unwrap();
assert_eq!(av.get::<Hertz>(), 200.0);
}
#[test]
fn test_to_raw() {
let av = Frequency::new::<Hertz>(200.0);
assert_eq!(av.to_raw().as_ref(), "200");
let av = Frequency::new::<Hertz>(200.2);
assert_eq!(av.to_raw().as_ref(), "200");
let av = Frequency::new::<Hertz>(199.7);
assert_eq!(av.to_raw().as_ref(), "200");
}
}