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# Copyright The OpenTelemetry Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# pylint: disable=protected-access
from time import sleep
from unittest import TestCase
from unittest.mock import Mock
from opentelemetry.metrics import Observation
from opentelemetry.sdk.metrics import Counter, MeterProvider
from opentelemetry.sdk.metrics.export import (
AggregationTemporality,
InMemoryMetricReader,
Metric,
NumberDataPoint,
Sum,
)
class TestInMemoryMetricReader(TestCase):
def test_no_metrics(self):
mock_collect_callback = Mock(return_value=[])
reader = InMemoryMetricReader()
reader._set_collect_callback(mock_collect_callback)
self.assertEqual(reader.get_metrics_data(), [])
mock_collect_callback.assert_called_once()
def test_converts_metrics_to_list(self):
metric = Metric(
name="foo",
description="",
unit="",
data=Sum(
data_points=[
NumberDataPoint(
attributes={"myattr": "baz"},
start_time_unix_nano=1647626444152947792,
time_unix_nano=1647626444153163239,
value=72.3309814450449,
)
],
aggregation_temporality=AggregationTemporality.CUMULATIVE,
is_monotonic=True,
),
)
mock_collect_callback = Mock(return_value=(metric,))
reader = InMemoryMetricReader()
reader._set_collect_callback(mock_collect_callback)
returned_metrics = reader.get_metrics_data()
mock_collect_callback.assert_called_once()
self.assertIsInstance(returned_metrics, tuple)
self.assertEqual(len(returned_metrics), 1)
self.assertIs(returned_metrics[0], metric)
def test_shutdown(self):
# shutdown should always be successful
self.assertIsNone(InMemoryMetricReader().shutdown())
def test_integration(self):
reader = InMemoryMetricReader()
meter = MeterProvider(metric_readers=[reader]).get_meter("test_meter")
counter1 = meter.create_counter("counter1")
meter.create_observable_gauge(
"observable_gauge1",
callbacks=[lambda options: [Observation(value=12)]],
)
counter1.add(1, {"foo": "1"})
counter1.add(1, {"foo": "2"})
metrics = reader.get_metrics_data()
# should be 3 number data points, one from the observable gauge and one
# for each labelset from the counter
self.assertEqual(len(metrics.resource_metrics[0].scope_metrics), 1)
self.assertEqual(
len(metrics.resource_metrics[0].scope_metrics[0].metrics), 2
)
self.assertEqual(
len(
list(
metrics.resource_metrics[0]
.scope_metrics[0]
.metrics[0]
.data.data_points
)
),
2,
)
self.assertEqual(
len(
list(
metrics.resource_metrics[0]
.scope_metrics[0]
.metrics[1]
.data.data_points
)
),
1,
)
def test_cumulative_multiple_collect(self):
reader = InMemoryMetricReader(
preferred_temporality={Counter: AggregationTemporality.CUMULATIVE}
)
meter = MeterProvider(metric_readers=[reader]).get_meter("test_meter")
counter = meter.create_counter("counter1")
counter.add(1, attributes={"key": "value"})
reader.collect()
number_data_point_0 = list(
reader._metrics_data.resource_metrics[0]
.scope_metrics[0]
.metrics[0]
.data.data_points
)[0]
# Windows tests fail without this sleep because both time_unix_nano
# values are the same.
sleep(0.1)
reader.collect()
number_data_point_1 = list(
reader._metrics_data.resource_metrics[0]
.scope_metrics[0]
.metrics[0]
.data.data_points
)[0]
self.assertEqual(
number_data_point_0.attributes, number_data_point_1.attributes
)
self.assertEqual(
number_data_point_0.start_time_unix_nano,
number_data_point_1.start_time_unix_nano,
)
self.assertEqual(
number_data_point_0.start_time_unix_nano,
number_data_point_1.start_time_unix_nano,
)
self.assertEqual(number_data_point_0.value, number_data_point_1.value)
self.assertGreater(
number_data_point_1.time_unix_nano,
number_data_point_0.time_unix_nano,
)
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