______ TestBatchSpanProcessor.test_batch_span_processor_scheduled_delay _______

self = <tests.trace.export.test_export.TestBatchSpanProcessor testMethod=test_batch_span_processor_scheduled_delay>

    def test_batch_span_processor_scheduled_delay(self):
        """Test that spans are exported each schedule_delay_millis"""
        spans_names_list = []
    
        export_event = threading.Event()
        my_exporter = MySpanExporter(
            destination=spans_names_list, export_event=export_event
        )
        start_time = time.time()
        span_processor = export.BatchSpanProcessor(
            my_exporter,
            schedule_delay_millis=500,
        )
    
        # create single span
        resource = Resource.create({})
        _create_start_and_end_span("foo", span_processor, resource)
    
        self.assertTrue(export_event.wait(2))
        export_time = time.time()
        self.assertEqual(len(spans_names_list), 1)
>       self.assertGreaterEqual((export_time - start_time) * 1e3, 500)
E       AssertionError: 499.9737739562988 not greater than or equal to 500