zeroconf 0.18.0

cross-platform library that wraps ZeroConf/mDNS implementations like Bonjour or Avahi
Documentation 
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use crate::prelude::*;
use crate::{BrowserEvent, MdnsBrowser, MdnsService, ServiceType, TxtRecord};
use std::sync::{Arc, Mutex};
use std::time::Duration;

#[derive(Default, Debug)]
struct Context {
    is_discovered: bool,
    timed_out: bool,
    txt: Option<TxtRecord>,
}

#[test]
fn service_register_is_browsable() {
    super::setup();

    const TOTAL_TEST_TIME_S: u64 = 30;
    static SERVICE_NAME: &str = "service_register_is_browsable";

    let mut service = MdnsService::new(
        ServiceType::with_sub_types("http", "tcp", vec!["printer"]).unwrap(),
        8080,
    );

    let context: Arc<Mutex<Context>> = Arc::default();

    let mut txt = TxtRecord::new();
    txt.insert("foo", "bar").unwrap();

    service.set_name(SERVICE_NAME);
    service.set_context(Box::new(context.clone()));
    service.set_txt_record(txt.clone());

    service.set_registered_callback(Box::new(|result, context| {
        assert!(result.is_ok());

        let mut browser =
            MdnsBrowser::new(ServiceType::with_sub_types("http", "tcp", vec!["printer"]).unwrap());

        let context = context
            .as_ref()
            .unwrap()
            .downcast_ref::<Arc<Mutex<Context>>>()
            .unwrap()
            .clone();

        browser.set_context(Box::new(context.clone()));

        browser.set_service_callback(Box::new(|event, context| match event.unwrap() {
            BrowserEvent::Add(service) => {
                if service.name() == SERVICE_NAME {
                    let mut mtx = context
                        .as_ref()
                        .unwrap()
                        .downcast_ref::<Arc<Mutex<Context>>>()
                        .unwrap()
                        .lock()
                        .unwrap();

                    mtx.txt.clone_from(service.txt());
                    mtx.is_discovered = true;

                    debug!("Service discovered");
                }
            }
            BrowserEvent::Remove(service) => {
                debug!(
                    "Service removed: {}.{}.{}",
                    service.name(),
                    service.kind(),
                    service.domain()
                );
            }
        }));

        let event_loop = browser.browse_services().unwrap();
        let browse_start = std::time::Instant::now();

        loop {
            event_loop.poll(Duration::from_secs(0)).unwrap();

            if context.lock().unwrap().is_discovered {
                break;
            }

            if browse_start.elapsed().as_secs() > TOTAL_TEST_TIME_S / 2 {
                context.lock().unwrap().timed_out = true;
                break;
            }
        }
    }));

    let event_loop = service.register().unwrap();
    let publish_start = std::time::Instant::now();

    loop {
        event_loop.poll(Duration::from_secs(0)).unwrap();

        let mut mtx = context.lock().unwrap();

        if mtx.is_discovered {
            assert_eq!(txt, mtx.txt.take().unwrap());
            break;
        }

        if publish_start.elapsed().as_secs() > TOTAL_TEST_TIME_S {
            mtx.timed_out = true;
            break;
        }
    }

    assert!(!context.lock().unwrap().timed_out);
}