fn test_compiler_get_cached_or_compile_preprocessor_error()

in src/compiler/compiler.rs [2792:2877]

• 78 lines of code
• 1 McCabe index (conditional complexity)

    fn test_compiler_get_cached_or_compile_preprocessor_error(preprocessor_cache_mode: bool) {
        drop(env_logger::try_init());
        let creator = new_creator();
        let f = TestFixture::new();
        let gcc = f.mk_bin("gcc").unwrap();
        let runtime = single_threaded_runtime();
        let pool = runtime.handle().clone();
        let storage = DiskCache::new(
            f.tempdir.path().join("cache"),
            u64::MAX,
            &pool,
            PreprocessorCacheModeConfig {
                use_preprocessor_cache_mode: preprocessor_cache_mode,
                ..Default::default()
            },
            CacheMode::ReadWrite,
        );
        let storage = Arc::new(storage);
        let service = server::SccacheService::mock_with_storage(storage.clone(), pool.clone());

        // Pretend to be GCC.  Also inject a fake object file that the subsequent
        // preprocessor failure should remove.
        let obj = f.tempdir.path().join("foo.o");
        // Write a dummy input file so the preprocessor cache mode can work
        std::fs::write(f.tempdir.path().join("foo.c"), "whatever").unwrap();
        let o = obj.clone();
        next_command_calls(&creator, move |_| {
            let mut f = File::create(&o)?;
            f.write_all(b"file contents")?;
            Ok(MockChild::new(exit_status(0), "compiler_id=gcc", ""))
        });
        let c = get_compiler_info(
            creator.clone(),
            &gcc,
            f.tempdir.path(),
            &[],
            &[],
            &pool,
            None,
        )
        .wait()
        .unwrap()
        .0;
        // We should now have a fake object file.
        assert!(fs::metadata(&obj).is_ok());
        // The preprocessor invocation.
        const PREPROCESSOR_STDERR: &[u8] = b"something went wrong";
        next_command(
            &creator,
            Ok(MockChild::new(
                exit_status(1),
                b"preprocessor output",
                PREPROCESSOR_STDERR,
            )),
        );
        let cwd = f.tempdir.path();
        let arguments = ovec!["-c", "foo.c", "-o", "foo.o"];
        let hasher = match c.parse_arguments(&arguments, ".".as_ref(), &[]) {
            CompilerArguments::Ok(h) => h,
            o => panic!("Bad result from parse_arguments: {:?}", o),
        };
        let (cached, res) = runtime
            .block_on(async {
                hasher
                    .get_cached_or_compile(
                        &service,
                        None,
                        creator,
                        storage,
                        arguments,
                        cwd.to_path_buf(),
                        vec![],
                        CacheControl::Default,
                        pool,
                    )
                    .await
            })
            .unwrap();
        assert_eq!(cached, CompileResult::Error);
        assert_eq!(exit_status(1), res.status);
        // Shouldn't get anything on stdout, since that would just be preprocessor spew!
        assert_eq!(b"", res.stdout.as_slice());
        assert_eq!(PREPROCESSOR_STDERR, res.stderr.as_slice());
        // Errors in preprocessing should remove the object file.
        assert!(fs::metadata(&obj).is_err());
    }