jaeger exporter: check whether time_event.annotation is None (#303)

Author: meridional

opencensus/trace/exporters/jaeger_exporter.py

@@ -278,6 +278,8 @@ def _extract_logs_from_span(span):
     logs = []
     for time_event in span.time_events:
         annotation = time_event.annotation
+        if not annotation:
+            continue
         fields = _extract_tags(annotation.attributes)
 
         fields.append(jaeger.Tag(

tests/unit/trace/exporters/test_jaeger_exporter.py

@@ -200,7 +200,13 @@ def test_translate_to_jaeger(self):
                 timestamp=time,
                 annotation=time_event.Annotation(
                     description='First Annotation',
-                    attributes=annotation_attributes))
+                    attributes=annotation_attributes)),
+            time_event.TimeEvent(
+                timestamp=time,
+                message_event=time_event.MessageEvent(
+                    id='message-event-id',
+                    uncompressed_size_bytes=0,
+                )),
         ]
 
         links = [