browserslist/queries/
cover_by_region.rsuse super::{Distrib, QueryResult};
use crate::{data::caniuse::region::get_usage_by_region, error::Error};
use std::ops::ControlFlow;
pub(super) fn cover_by_region(coverage: f32, region: &str) -> QueryResult {
let normalized_region = if region.len() == 2 {
region.to_uppercase()
} else {
region.to_lowercase()
};
if let Some(region_data) = get_usage_by_region(&normalized_region) {
let result = region_data.iter().try_fold(
(vec![], 0.0),
|(mut distribs, total), (name, version, usage)| {
if total >= coverage || *usage == 0.0 {
ControlFlow::Break((distribs, total))
} else {
distribs.push(Distrib::new(name, *version));
ControlFlow::Continue((distribs, total + usage))
}
},
);
match result {
ControlFlow::Break((distribs, _)) => Ok(distribs),
_ => unreachable!(),
}
} else {
Err(Error::UnknownRegion(region.to_string()))
}
}
#[cfg(test)]
mod tests {
use crate::{opts::Opts, test::run_compare};
use test_case::test_case;
#[test_case("cover 0.1% in US"; "country")]
#[test_case("Cover 0.1% in us"; "country case insensitive")]
#[test_case("cover 0.1% in alt-eu"; "country alt")]
#[test_case("Cover 0.1% in Alt-EU"; "country alt case insensitive")]
fn valid(query: &str) {
run_compare(query, &Opts::new());
}
}