cleanup more after mockservices

jupyterhub/tests/conftest.py

@@ -68,9 +68,12 @@ def app(request):
 class MockServiceSpawner(jupyterhub.services.service._ServiceSpawner):
     poll_interval = 1
 
+_mock_service_counter = 0
 
 def _mockservice(request, app, url=False):
-    name = 'mock-service'
+    global _mock_service_counter
+    _mock_service_counter += 1
+    name = 'mock-service-%i' % _mock_service_counter
     spec = {
         'name': name,
         'command': mockservice_cmd,
@@ -86,7 +89,11 @@ def _mockservice(request, app, url=False):
         assert name in app._service_map
         service = app._service_map[name]
         app.io_loop.add_callback(service.start)
-        request.addfinalizer(service.stop)
+        def cleanup():
+            service.stop()
+            app.services[:] = []
+            app._service_map.clear()
+        request.addfinalizer(cleanup)
         for i in range(20):
             if not getattr(service, 'proc', False):
                 time.sleep(0.2)