The controller has a streaming API

Now we need to link the hypervisor to the controller.

tests/controller/test_project.py

@@ -99,3 +99,15 @@ def test_getLink(async_run):
 
     with pytest.raises(aiohttp.web_exceptions.HTTPNotFound):
         project.getLink("test")
+
+
+def test_emit(async_run):
+    project = Project()
+    with project.queue() as queue:
+        assert len(project._listeners) == 1
+        async_run(queue.get(0.1))  #  ping
+        project.emit('test', {})
+        notif = async_run(queue.get(5))
+        assert notif == ('test', {}, {})
+
+    assert len(project._listeners) == 0