flaky fastapi test

[xrmx]

Steps to reproduce

tox -e py38-test-instrumentation-fastapi

What is the expected behavior?

test is not flaky

What is the actual behavior?

_____ TestAutoInstrumentationHooks.test_basic_post_request_metric_success ______

self = <tests.test_fastapi_instrumentation.TestAutoInstrumentationHooks testMethod=test_basic_post_request_metric_success>

    def test_basic_post_request_metric_success(self):
        start = default_timer()
        response = self._client.post(
            "/foobar",
            json={"foo": "bar"},
        )
        duration = max(round((default_timer() - start) * 1000), 0)
        response_size = int(response.headers.get("content-length"))
        request_size = int(response.request.headers.get("content-length"))
        metrics_list = self.memory_metrics_reader.get_metrics_data()
        for metric in (
            metrics_list.resource_metrics[0].scope_metrics[0].metrics
        ):
            for point in list(metric.data.data_points):
                if isinstance(point, HistogramDataPoint):
                    self.assertEqual(point.count, 1)
                    if metric.name == "http.server.duration":
>                       self.assertAlmostEqual(duration, point.sum, delta=30)
E                       AssertionError: 34 != 1 within 30 delta (33 difference)

and

____________ TestAutoInstrumentationHooks.test_basic_metric_success ____________

self = <tests.test_fastapi_instrumentation.TestAutoInstrumentationHooks testMethod=test_basic_metric_success>

    def test_basic_metric_success(self):
        start = default_timer()
        self._client.get("/foobar")
        duration = max(round((default_timer() - start) * 1000), 0)
        expected_duration_attributes = {
            "http.method": "GET",
            "http.host": "testserver:443",
            "http.scheme": "https",
            "http.flavor": "1.1",
            "http.server_name": "testserver",
            "net.host.port": 443,
            "http.status_code": 200,
            "http.target": "/foobar",
        }
        expected_requests_count_attributes = {
            "http.method": "GET",
            "http.host": "testserver:443",
            "http.scheme": "https",
            "http.flavor": "1.1",
            "http.server_name": "testserver",
        }
        metrics_list = self.memory_metrics_reader.get_metrics_data()
        for metric in (
            metrics_list.resource_metrics[0].scope_metrics[0].metrics
        ):
            for point in list(metric.data.data_points):
                if isinstance(point, HistogramDataPoint):
                    self.assertDictEqual(
                        expected_duration_attributes,
                        dict(point.attributes),
                    )
                    self.assertEqual(point.count, 1)
>                   self.assertAlmostEqual(duration, point.sum, delta=30)
E                   AssertionError: 39 != 1 within 30 delta (38 difference)

Additional context

[emdneto]

I got same error here. I noticed there was a try to fix that in #1344 but test seems still flaky.