def test_finish_without_context_tracer(self):
    span_name = 'root_span'
    span = self._make_one(span_name)
    self.assertIsNone(span.end_time)
    span.finish()
    self.assertIsNone(span.end_time)
def test_finish_without_context_tracer(self):
    span_name = 'root_span'
    span = self._make_one(span_name)
    self.assertIsNone(span.end_time)
    span.finish()
    self.assertIsNone(span.end_time)