1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
|
use super::UnstableFeatures;
#[test]
fn rustc_bootstrap_parsing() {
let is_bootstrap = |env, krate| {
std::env::set_var("RUSTC_BOOTSTRAP", env);
matches!(UnstableFeatures::from_environment(krate), UnstableFeatures::Cheat)
};
assert!(is_bootstrap("1", None));
assert!(is_bootstrap("1", Some("x")));
// RUSTC_BOOTSTRAP allows specifying a specific crate
assert!(is_bootstrap("x", Some("x")));
// RUSTC_BOOTSTRAP allows multiple comma-delimited crates
assert!(is_bootstrap("x,y,z", Some("x")));
assert!(is_bootstrap("x,y,z", Some("y")));
// Crate that aren't specified do not get unstable features
assert!(!is_bootstrap("x", Some("a")));
assert!(!is_bootstrap("x,y,z", Some("a")));
assert!(!is_bootstrap("x,y,z", None));
// this is technically a breaking change, but there are no stability guarantees for RUSTC_BOOTSTRAP
assert!(!is_bootstrap("0", None));
}
|
