opentelemetry-test-utils: assert explicit bucket boundaries in histogram metrics (#4595)

* opentelemetry-test-utils: assert explicit bucket boundaries in histogram metrics

* Add changelog

Author: xrmx

CHANGELOG.md

@@ -18,6 +18,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#4333](https://github.com/open-telemetry/opentelemetry-python/pull/4333))
 - opentelemetry-api: allow importlib-metadata 8.7.0
   ([#4593](https://github.com/open-telemetry/opentelemetry-python/pull/4593))
+- opentelemetry-test-utils: assert explicit bucket boundaries in histogram metrics
+  ([#4595](https://github.com/open-telemetry/opentelemetry-python/pull/4595))
 
 ## Version 1.33.0/0.54b0 (2025-05-09)
 

tests/opentelemetry-test-utils/src/opentelemetry/test/test_base.py

@@ -20,6 +20,9 @@
 from opentelemetry import metrics as metrics_api
 from opentelemetry import trace as trace_api
 from opentelemetry.sdk.metrics import MeterProvider
+from opentelemetry.sdk.metrics._internal.aggregation import (
+    _DEFAULT_EXPLICIT_BUCKET_HISTOGRAM_AGGREGATION_BOUNDARIES,
+)
 from opentelemetry.sdk.metrics._internal.point import Metric
 from opentelemetry.sdk.metrics.export import (
     DataPointT,
@@ -204,6 +207,12 @@ def is_data_points_equal(
             ):
                 return False
 
+            if (
+                expected_data_point.explicit_bounds
+                != data_point.explicit_bounds
+            ):
+                return False
+
         return (
             values_diff <= est_value_delta
             and expected_data_point.attributes == dict(data_point.attributes)
@@ -239,7 +248,12 @@ def create_number_data_point(value, attributes):
 
     @staticmethod
     def create_histogram_data_point(
-        sum_data_point, count, max_data_point, min_data_point, attributes
+        sum_data_point,
+        count,
+        max_data_point,
+        min_data_point,
+        attributes,
+        explicit_bounds=None,
     ):
         return HistogramDataPoint(
             count=count,
@@ -250,7 +264,9 @@ def create_histogram_data_point(
             start_time_unix_nano=0,
             time_unix_nano=0,
             bucket_counts=[],
-            explicit_bounds=[],
+            explicit_bounds=explicit_bounds
+            if explicit_bounds is not None
+            else _DEFAULT_EXPLICIT_BUCKET_HISTOGRAM_AGGREGATION_BOUNDARIES,
         )