inotify 0.4.1

Idiomatic wrapper for inotify
Documentation 
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// This test suite is incomplete and doesn't cover all available functionality.
// Contributions to improve test coverage would be highly appreciated!

extern crate inotify;
extern crate tempdir;

use inotify::{
    watch_mask,
    Inotify,
};
use std::fs::File;
use std::io::Write;
use std::path::PathBuf;
use tempdir::TempDir;


#[test]
fn it_should_watch_a_file() {
    let mut testdir = TestDir::new();
    let (path, mut file) = testdir.new_file();

    let mut inotify = Inotify::init().unwrap();
    let watch = inotify.add_watch(&path, watch_mask::MODIFY).unwrap();

    write_to(&mut file);

    let mut buffer = [0; 1024];
    let events = inotify.read_events_blocking(&mut buffer).unwrap();

    let mut num_events = 0;
    for event in events {
        assert_eq!(watch, event.wd);
        num_events += 1;
    }
    assert!(num_events > 0);
}

#[test]
fn it_should_return_immediately_if_no_events_are_available() {
    let mut inotify = Inotify::init().unwrap();

    let mut buffer = [0; 1024];
    assert_eq!(0, inotify.read_events(&mut buffer).unwrap().count());
}

#[test]
fn it_should_handle_file_names_correctly() {
    let mut testdir = TestDir::new();
    let (mut path, mut file) = testdir.new_file();
    let file_name = path
        .file_name().unwrap()
        .to_str().unwrap()
        .to_string();
    path.pop(); // Get path to the directory the file is in

    let mut inotify = Inotify::init().unwrap();
    inotify.add_watch(&path, watch_mask::MODIFY).unwrap();

    write_to(&mut file);

    let mut buffer = [0; 1024];
    let events = inotify.read_events_blocking(&mut buffer).unwrap();

    let mut num_events = 0;
    for event in events {
        assert_eq!(file_name, event.name.to_str().unwrap());
        num_events += 1;
    }
    assert!(num_events > 0);
}


struct TestDir {
    dir: TempDir,
    counter: u32,
}

impl TestDir {
    fn new() -> TestDir {
        TestDir {
            dir: TempDir::new("inotify-rs-test").unwrap(),
            counter: 0,
        }
    }

    fn new_file(&mut self) -> (PathBuf, File) {
        let id = self.counter;
        self.counter += 1;

        let path = self.dir.path().join("file-".to_string() + &id.to_string());
        let file = File::create(&path)
            .unwrap_or_else(|error| panic!("Failed to create temporary file: {}", error));

        (path, file)
    }
}

fn write_to(file: &mut File) {
    file
        .write(b"This should trigger an inotify event.")
        .unwrap_or_else(|error|
            panic!("Failed to write to file: {}", error)
        );
}