fn test_process_preprocessor_line_fs_access()

in src/compiler/c.rs [1931:2041]

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

    fn test_process_preprocessor_line_fs_access() {
        env_logger::builder()
            .is_test(true)
            .filter_level(log::LevelFilter::Debug)
            .try_init()
            .ok();

        // Test "too new" include file
        let mut include_files = HashMap::new();
        let fs_impl = TestFs {
            metadata_results: Mutex::new(
                [(
                    PathBuf::from("/usr/include/x86_64-linux-gnu/bits/libc-header-start.h"),
                    PreprocessorFileMetadata {
                        is_dir: false,
                        is_file: true,
                        modified: Some(Timestamp::new(i64::MAX - 1, 0)),
                        ctime_or_creation: None,
                    },
                )]
                .into_iter()
                .collect(),
            ),
            open_results: Mutex::new(VecDeque::new()),
        };
        assert_eq!(
            do_single_preprocessor_line_call(
                br#"// # 33 "/usr/include/x86_64-linux-gnu/bits/libc-header-start.h" 3 4"#,
                &mut include_files,
                &fs_impl,
                false,
            ),
            // preprocessor cache mode is disabled
            ControlFlow::Break((63, 9, false)),
        );

        // Test invalid include file is actually a dir
        let mut include_files = HashMap::new();
        let fs_impl = TestFs {
            metadata_results: Mutex::new(
                [(
                    PathBuf::from("/usr/include/x86_64-linux-gnu/bits/libc-header-start.h"),
                    PreprocessorFileMetadata {
                        is_dir: true,
                        is_file: false,
                        modified: Some(Timestamp::new(12341234, 0)),
                        ctime_or_creation: None,
                    },
                )]
                .into_iter()
                .collect(),
            ),
            open_results: Mutex::new(VecDeque::new()),
        };
        assert_eq!(
            do_single_preprocessor_line_call(
                br#"// # 33 "/usr/include/x86_64-linux-gnu/bits/libc-header-start.h" 3 4"#,
                &mut include_files,
                &fs_impl,
                false,
            ),
            // preprocessor cache mode is *not* disabled,
            ControlFlow::Continue((63, 63)),
        );
        assert_eq!(include_files.len(), 0);

        // Test correct include file
        let mut include_files = HashMap::new();
        let fs_impl = TestFs {
            metadata_results: Mutex::new(
                [(
                    PathBuf::from("/usr/include/x86_64-linux-gnu/bits/libc-header-start.h"),
                    PreprocessorFileMetadata {
                        is_dir: false,
                        is_file: true,
                        modified: Some(Timestamp::new(12341234, 0)),
                        ctime_or_creation: None,
                    },
                )]
                .into_iter()
                .collect(),
            ),
            open_results: Mutex::new(
                [(
                    PathBuf::from("/usr/include/x86_64-linux-gnu/bits/libc-header-start.h"),
                    Box::new(&b"contents"[..]) as Box<dyn std::io::Read>,
                )]
                .into_iter()
                .collect(),
            ),
        };
        assert_eq!(
            do_single_preprocessor_line_call(
                br#"// # 33 "/usr/include/x86_64-linux-gnu/bits/libc-header-start.h" 3 4"#,
                &mut include_files,
                &fs_impl,
                false,
            ),
            ControlFlow::Continue((63, 63)),
        );
        assert_eq!(include_files.len(), 1);
        assert_eq!(
            include_files
                .get(Path::new(
                    "/usr/include/x86_64-linux-gnu/bits/libc-header-start.h",
                ))
                .unwrap(),
            // hash of `b"contents"`
            "a93900c371d997927c5bc568ea538bed59ae5c960021dcfe7b0b369da5267528",
        );
    }