Small changes in events, and associated tests.

tests/execution/test_events.py

@@ -0,0 +1,17 @@
+from unittest.mock import Mock
+
+from bonobo.execution import events
+
+
+def test_names():
+    # This test looks useless, but as it's becoming the pliugin API, I want to make sure that nothing changes here, or
+    # notice it otherwise.
+    for name in 'start', 'started', 'tick', 'stop', 'stopped', 'kill':
+        event_name = getattr(events, name.upper())
+        assert event_name == '.'.join(('execution', name))
+
+def test_event_object():
+    # Same logic as above.
+    c = Mock()
+    e = events.ExecutionEvent(c)
+    assert e.context is c