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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));
// `RUSTC_BOOTSTRAP=0` is not recognized.
assert!(!is_bootstrap("0", None));
// `RUSTC_BOOTSTRAP=-1` is force-stable, no unstable features allowed.
let is_force_stable = |krate| {
std::env::set_var("RUSTC_BOOTSTRAP", "-1");
matches!(UnstableFeatures::from_environment(krate), UnstableFeatures::Disallow)
};
assert!(is_force_stable(None));
// Does not support specifying any crate.
assert!(is_force_stable(Some("x")));
assert!(is_force_stable(Some("x,y,z")));
}
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