fn test_bogus_families()

in target-spec/src/simple_eval.rs [78:131]

• 35 lines of code
• 4 McCabe index (conditional complexity)

    fn test_bogus_families() {
        // Known bogus families.
        for family in &["test", "debug_assertions", "proc_macro"] {
            let cfg = format!("cfg({})", family);
            let cfg_not = format!("cfg(not({}))", family);
            assert_eq!(eval(&cfg, "x86_64-unknown-linux-gnu"), Ok(Some(false)));
            assert_eq!(eval(&cfg_not, "x86_64-unknown-linux-gnu"), Ok(Some(true)));
        }

        // Unknown bogus families.
        let platform = Platform::new("x86_64-unknown-linux-gnu", TargetFeatures::Unknown).unwrap();
        let mut platform_with_flags = platform.clone();
        platform_with_flags.add_flags(["foo", "bar"].iter().copied());

        for family in &["foo", "bar"] {
            let cfg = format!("cfg({})", family);
            let cfg_not = format!("cfg(not({}))", family);

            // eval always means flags are evaluated to false.
            assert_eq!(eval(&cfg, "x86_64-unknown-linux-gnu"), Ok(Some(false)));
            assert_eq!(eval(&cfg_not, "x86_64-unknown-linux-gnu"), Ok(Some(true)));

            let spec: TargetSpec = cfg.parse().unwrap();
            let spec_not: TargetSpec = cfg_not.parse().unwrap();

            // flag missing means false.
            assert_eq!(spec.eval(&platform), Some(false));
            assert_eq!(spec_not.eval(&platform), Some(true));

            // flag present means true.
            assert_eq!(spec.eval(&platform_with_flags), Some(true));
            assert_eq!(spec_not.eval(&platform_with_flags), Some(false));
        }

        for family in &["baz", "nonsense"] {
            let cfg = format!("cfg({})", family);
            let cfg_not = format!("cfg(not({}))", family);

            // eval always means flags are evaluated to false.
            assert_eq!(eval(&cfg, "x86_64-unknown-linux-gnu"), Ok(Some(false)));
            assert_eq!(eval(&cfg_not, "x86_64-unknown-linux-gnu"), Ok(Some(true)));

            let spec: TargetSpec = cfg.parse().unwrap();
            let spec_not: TargetSpec = cfg_not.parse().unwrap();

            // flag missing means false.
            assert_eq!(spec.eval(&platform), Some(false));
            assert_eq!(spec_not.eval(&platform), Some(true));

            // flag still missing means false.
            assert_eq!(spec.eval(&platform_with_flags), Some(false));
            assert_eq!(spec_not.eval(&platform_with_flags), Some(true));
        }
    }