24 lines
933 B
Rust
24 lines
933 B
Rust
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use super::UnstableFeatures;
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#[test]
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fn rustc_bootstrap_parsing() {
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let is_bootstrap = |env, krate| {
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std::env::set_var("RUSTC_BOOTSTRAP", env);
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matches!(UnstableFeatures::from_environment(krate), UnstableFeatures::Cheat)
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};
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assert!(is_bootstrap("1", None));
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assert!(is_bootstrap("1", Some("x")));
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// RUSTC_BOOTSTRAP allows specifying a specific crate
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assert!(is_bootstrap("x", Some("x")));
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// RUSTC_BOOTSTRAP allows multiple comma-delimited crates
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assert!(is_bootstrap("x,y,z", Some("x")));
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assert!(is_bootstrap("x,y,z", Some("y")));
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// Crate that aren't specified do not get unstable features
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assert!(!is_bootstrap("x", Some("a")));
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assert!(!is_bootstrap("x,y,z", Some("a")));
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assert!(!is_bootstrap("x,y,z", None));
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// this is technically a breaking change, but there are no stability guarantees for RUSTC_BOOTSTRAP
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assert!(!is_bootstrap("0", None));
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}
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