browserslist/queries/
last_n_x_major_browsers.rsuse super::{count_android_filter, should_filter_android, Distrib, QueryResult};
use crate::{data::caniuse::get_browser_stat, error::Error, opts::Opts};
use itertools::Itertools;
pub(super) fn last_n_x_major_browsers(count: usize, name: &str, opts: &Opts) -> QueryResult {
let (name, stat) = get_browser_stat(name, opts.mobile_to_desktop)
.ok_or_else(|| Error::BrowserNotFound(name.to_string()))?;
let count = if should_filter_android(name, opts.mobile_to_desktop) {
count_android_filter(count, opts.mobile_to_desktop)
} else {
count
};
let minimum = stat
.version_list
.iter()
.filter(|version| version.release_date.is_some())
.map(|version| &*version.version)
.rev()
.map(|version| version.split('.').next().unwrap())
.dedup()
.nth(count - 1)
.and_then(|minimum| minimum.parse().ok())
.unwrap_or(0);
let distribs = stat
.version_list
.iter()
.filter(|version| version.release_date.is_some())
.map(|version| &*version.version)
.filter(move |version| version.split('.').next().unwrap().parse().unwrap_or(0) >= minimum)
.rev()
.map(move |version| Distrib::new(name, version))
.collect();
Ok(distribs)
}
#[cfg(test)]
mod tests {
use super::*;
use crate::test::run_compare;
use test_case::test_case;
#[test_case("last 2 edge major versions"; "basic")]
#[test_case("last 1 bb major version"; "support pluralization")]
#[test_case("last 3 Chrome major versions"; "case insensitive")]
#[test_case("last 2 android major versions"; "android")]
#[test_case("last 2 bb major versions"; "non-sequential version numbers")]
#[test_case("last 3 bb major versions"; "more versions than have been released")]
fn default_options(query: &str) {
run_compare(query, &Opts::new());
}
#[test]
fn mobile_to_desktop() {
run_compare(
"last 2 android major versions",
Opts::new().mobile_to_desktop(true),
);
}
}