extrasafe 0.5.1

use extrasafe::builtins::SystemIO;
use extrasafe::*;

use std::fs::{File, OpenOptions};

use std::io::Write;

#[test]
fn allow_open_readonly() {
    // create tempdir
    let dir = tempfile::tempdir().unwrap();

    let mut path = dir.path().to_path_buf();
    path.push("open_me.txt");

    // Create file, write to it, close it
    let mut file = File::create(&path).unwrap();
    file.write_all(b"hello world").unwrap();
    file.sync_all().unwrap();
    drop(file);

    // Enable safetycontext

    SafetyContext::new()
        .enable(
            SystemIO::nothing()
                .allow_open_readonly()
                .allow_read()
                .allow_metadata()
                .allow_close(),
        )
        .unwrap()
        .apply_to_current_thread()
        .unwrap();

    // Try to open for writing and fail
    let res = OpenOptions::new().read(true).write(true).open(&path);
    assert!(
        res.is_err(),
        "Successfully opened file for writing incorrectly"
    );

    // Try to open for append and fail
    let res = OpenOptions::new().read(true).append(true).open(&path);
    assert!(
        res.is_err(),
        "Successfully opened file for append incorrectly"
    );

    // Try to open for create and fail
    let res = OpenOptions::new().read(true).create(true).open(&path);
    assert!(
        res.is_err(),
        "Successfully opened file with create incorrectly"
    );

    // Try to open for create_new and fail
    let mut new_path = dir.path().to_path_buf();
    new_path.push("new_path.txt");
    let res = OpenOptions::new()
        .read(true)
        .create_new(true)
        .open(&new_path);
    assert!(
        res.is_err(),
        "Successfully opened file with create_new incorrectly"
    );

    // open for read only and succeed
    let res = OpenOptions::new().read(true).write(false).open(&path);
    assert!(
        res.is_ok(),
        "Failed to open file for reading: {:?}",
        res.unwrap_err()
    );
}