make test more stable

Author: Stephan Dilly

asyncgit/src/asyncjob/mod.rs

@@ -63,7 +63,9 @@ impl<J: 'static + AsyncJob, T: Copy + Send + 'static>
 		}
 	}
 
-	/// spawns `task` if nothing is running currently, otherwise schedules as `next` overwriting if `next` was set before
+	/// spawns `task` if nothing is running currently,
+	/// otherwise schedules as `next` overwriting if `next` was set before.
+	/// return `true` if the new task gets started right away.
 	pub fn spawn(&mut self, task: J) -> bool {
 		self.schedule_next(task);
 		self.check_for_job()
@@ -129,23 +131,35 @@ mod test {
 	use crossbeam_channel::unbounded;
 	use pretty_assertions::assert_eq;
 	use std::{
-		sync::atomic::AtomicU32, thread::sleep, time::Duration,
+		sync::atomic::{AtomicBool, AtomicU32, Ordering},
+		thread,
+		time::Duration,
 	};
 
 	#[derive(Clone)]
 	struct TestJob {
 		v: Arc<AtomicU32>,
+		finish: Arc<AtomicBool>,
 		value_to_add: u32,
 	}
 
 	impl AsyncJob for TestJob {
 		fn run(&mut self) {
-			sleep(Duration::from_millis(100));
+			self.finish.store(false, Ordering::Relaxed);
 
-			self.v.fetch_add(
-				self.value_to_add,
-				std::sync::atomic::Ordering::Relaxed,
-			);
+			println!("[job] wait");
+
+			while self.finish.load(Ordering::Relaxed) {
+				std::thread::yield_now();
+			}
+
+			println!("[job] sleep");
+
+			thread::sleep(Duration::from_millis(100));
+
+			println!("[job] done sleeping");
+
+			self.v.fetch_add(self.value_to_add, Ordering::Relaxed);
 		}
 	}
 
@@ -160,15 +174,20 @@ mod test {
 
 		let task = TestJob {
 			v: Arc::new(AtomicU32::new(1)),
+			finish: Arc::new(AtomicBool::new(false)),
 			value_to_add: 1,
 		};
 
 		assert!(job.spawn(task.clone()));
-		sleep(Duration::from_millis(1));
+		thread::sleep(Duration::from_millis(10));
+
 		for _ in 0..5 {
+			println!("spawn");
 			assert!(!job.spawn(task.clone()));
 		}
 
+		task.finish.store(true, Ordering::Relaxed);
+
 		let _foo = receiver.recv().unwrap();
 		let _foo = receiver.recv().unwrap();
 		assert!(receiver.is_empty());
@@ -179,6 +198,12 @@ mod test {
 		);
 	}
 
+	fn wait_for_job(job: &AsyncSingleJob<TestJob, Notificaton>) {
+		while job.is_pending() {
+			thread::sleep(Duration::from_millis(10));
+		}
+	}
+
 	#[test]
 	fn test_cancel() {
 		let (sender, receiver) = unbounded();
@@ -188,17 +213,26 @@ mod test {
 
 		let task = TestJob {
 			v: Arc::new(AtomicU32::new(1)),
+			finish: Arc::new(AtomicBool::new(false)),
 			value_to_add: 1,
 		};
 
 		assert!(job.spawn(task.clone()));
-		sleep(Duration::from_millis(1));
+		task.finish.store(true, Ordering::Relaxed);
+		thread::sleep(Duration::from_millis(10));
 
 		for _ in 0..5 {
+			println!("spawn");
 			assert!(!job.spawn(task.clone()));
 		}
+
+		println!("cancel");
 		assert!(job.cancel());
 
+		task.finish.store(true, Ordering::Relaxed);
+
+		wait_for_job(&job);
+
 		let _foo = receiver.recv().unwrap();
 
 		assert_eq!(