tokio 1.37.0

#![warn(rust_2018_idioms)]
#![cfg(all(feature = "full", not(target_os = "wasi")))] // WASI does not support all fs operations

use tokio::fs;
use tokio_test::{assert_err, assert_ok};

use std::sync::{Arc, Mutex};
use tempfile::tempdir;

#[tokio::test]
async fn create_dir() {
    let base_dir = tempdir().unwrap();
    let new_dir = base_dir.path().join("foo");
    let new_dir_2 = new_dir.clone();

    assert_ok!(fs::create_dir(new_dir).await);

    assert!(new_dir_2.is_dir());
}

#[tokio::test]
async fn create_all() {
    let base_dir = tempdir().unwrap();
    let new_dir = base_dir.path().join("foo").join("bar");
    let new_dir_2 = new_dir.clone();

    assert_ok!(fs::create_dir_all(new_dir).await);
    assert!(new_dir_2.is_dir());
}

#[tokio::test]
async fn build_dir() {
    let base_dir = tempdir().unwrap();
    let new_dir = base_dir.path().join("foo").join("bar");
    let new_dir_2 = new_dir.clone();

    assert_ok!(fs::DirBuilder::new().recursive(true).create(new_dir).await);

    assert!(new_dir_2.is_dir());
    assert_err!(
        fs::DirBuilder::new()
            .recursive(false)
            .create(new_dir_2)
            .await
    );
}

#[tokio::test]
#[cfg(unix)]
async fn build_dir_mode_read_only() {
    let base_dir = tempdir().unwrap();
    let new_dir = base_dir.path().join("abc");

    assert_ok!(
        fs::DirBuilder::new()
            .recursive(true)
            .mode(0o444)
            .create(&new_dir)
            .await
    );

    assert!(fs::metadata(new_dir)
        .await
        .expect("metadata result")
        .permissions()
        .readonly());
}

#[tokio::test]
async fn remove() {
    let base_dir = tempdir().unwrap();
    let new_dir = base_dir.path().join("foo");
    let new_dir_2 = new_dir.clone();

    std::fs::create_dir(new_dir.clone()).unwrap();

    assert_ok!(fs::remove_dir(new_dir).await);
    assert!(!new_dir_2.exists());
}

#[tokio::test]
async fn read_inherent() {
    let base_dir = tempdir().unwrap();

    let p = base_dir.path();
    std::fs::create_dir(p.join("aa")).unwrap();
    std::fs::create_dir(p.join("bb")).unwrap();
    std::fs::create_dir(p.join("cc")).unwrap();

    let files = Arc::new(Mutex::new(Vec::new()));

    let f = files.clone();
    let p = p.to_path_buf();

    let mut entries = fs::read_dir(p).await.unwrap();

    while let Some(e) = assert_ok!(entries.next_entry().await) {
        let s = e.file_name().to_str().unwrap().to_string();
        f.lock().unwrap().push(s);
    }

    let mut files = files.lock().unwrap();
    files.sort(); // because the order is not guaranteed
    assert_eq!(
        *files,
        vec!["aa".to_string(), "bb".to_string(), "cc".to_string()]
    );
}

#[tokio::test]
async fn read_dir_entry_info() {
    let temp_dir = tempdir().unwrap();

    let file_path = temp_dir.path().join("a.txt");

    fs::write(&file_path, b"Hello File!").await.unwrap();

    let mut dir = fs::read_dir(temp_dir.path()).await.unwrap();

    let first_entry = dir.next_entry().await.unwrap().unwrap();

    assert_eq!(first_entry.path(), file_path);
    assert_eq!(first_entry.file_name(), "a.txt");
    assert!(first_entry.metadata().await.unwrap().is_file());
    assert!(first_entry.file_type().await.unwrap().is_file());
}