tests: use a different event loop for each test

artiq/test/pc_rpc.py

@@ -73,8 +73,10 @@ class RPCCase(unittest.TestCase):
             remote.close_rpc()
 
     def _loop_asyncio_echo(self):
-        loop = asyncio.get_event_loop()
+        loop = asyncio.new_event_loop()
+        asyncio.set_event_loop(loop)
         loop.run_until_complete(self._asyncio_echo())
+        loop.close()
 
     def test_asyncio_echo(self):
         self._run_server_and_test(self._loop_asyncio_echo)
@@ -96,7 +98,8 @@ class Echo:
 
 
 def run_server():
-    loop = asyncio.get_event_loop()
+    loop = asyncio.new_event_loop()
+    asyncio.set_event_loop(loop)
     try:
         echo = Echo()
         server = pc_rpc.Server({"test": echo})

artiq/test/scheduler.py

@@ -55,7 +55,12 @@ _handlers = {
 
 
 class SchedulerCase(unittest.TestCase):
+    def setUp(self):
+        self.loop = asyncio.new_event_loop()
+        asyncio.set_event_loop(self.loop)
+
     def test_steps(self):
+        loop = self.loop
         scheduler = Scheduler(0, _handlers)
         expid = _get_expid("EmptyExperiment")
 
@@ -70,7 +75,6 @@ class SchedulerCase(unittest.TestCase):
                 done.set()
         scheduler.notifier.publish = notify
 
-        loop = asyncio.get_event_loop()
         scheduler.start()
 
         # Verify that a timed experiment far in the future does not
@@ -91,6 +95,7 @@ class SchedulerCase(unittest.TestCase):
         loop.run_until_complete(scheduler.stop())
 
     def test_pause(self):
+        loop = self.loop
         scheduler = Scheduler(0, _handlers)
         expid_bg = _get_expid("BackgroundExperiment")
         expid = _get_expid("EmptyExperiment")
@@ -113,7 +118,6 @@ class SchedulerCase(unittest.TestCase):
                     done.set()
         scheduler.notifier.publish = notify
 
-        loop = asyncio.get_event_loop()
         scheduler.start()
         scheduler.submit("main", expid_bg, -99, None, False)
         loop.run_until_complete(background_running.wait())
@@ -122,6 +126,7 @@ class SchedulerCase(unittest.TestCase):
         loop.run_until_complete(scheduler.stop())
 
     def test_flush(self):
+        loop = self.loop
         scheduler = Scheduler(0, _handlers)
         expid = _get_expid("EmptyExperiment")
 
@@ -147,10 +152,12 @@ class SchedulerCase(unittest.TestCase):
                     done.set()
         scheduler.notifier.publish = notify
 
-        loop = asyncio.get_event_loop()
         scheduler.start()
         scheduler.submit("main", expid, 0, None, False)
         loop.run_until_complete(first_preparing.wait())
         scheduler.submit("main", expid, 1, None, True)
         loop.run_until_complete(done.wait())
         loop.run_until_complete(scheduler.stop())
+
+    def tearDown(self):
+        self.loop.close()

artiq/test/sync_struct.py

@@ -35,9 +35,12 @@ class SyncStructCase(unittest.TestCase):
                 or "Finished" not in self.test_dict.keys():
             yield from asyncio.sleep(0.5)
 
+    def setUp(self):
+        self.loop = asyncio.new_event_loop()
+        asyncio.set_event_loop(self.loop)
+
     def test_recv(self):
-        self.loop = loop = asyncio.new_event_loop()
-        asyncio.set_event_loop(loop)
+        loop = self.loop
         publisher = asyncio.Future()
         test_dict = asyncio.Future()
         asyncio.async(start_server(publisher, test_dict))
@@ -55,8 +58,8 @@ class SyncStructCase(unittest.TestCase):
                                                         test_port))
         loop.run_until_complete(self.do_recv())
         self.assertEqual(self.test_dict, test_vector)
-
-    def tearDown(self):
         self.loop.run_until_complete(self.subscriber.close())
         self.loop.run_until_complete(self.publisher.stop())
+
+    def tearDown(self):
         self.loop.close()

artiq/test/worker.py

@@ -40,6 +40,8 @@ def _call_worker(worker, expid):
 
 
 def _run_experiment(experiment):
+    loop = asyncio.new_event_loop()
+    asyncio.set_event_loop(loop)
     expid = {
         "file": sys.modules[__name__].__file__,
         "experiment": experiment,
@@ -50,8 +52,8 @@ def _run_experiment(experiment):
     }
 
     worker = Worker(handlers)
-    loop = asyncio.get_event_loop()
     loop.run_until_complete(_call_worker(worker, expid))
+    loop.close()
 
 
 class WatchdogCase(unittest.TestCase):