add changelog and improve test

CHANGELOG.md

@@ -7,7 +7,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
-- Make log sdk add `exception.message` to logRecord for exceptions whose argument 
+- Make log sdk add `exception.message` to logRecord for exceptions whose argument
   is an exception not a string message
   ([#4122](https://github.com/open-telemetry/opentelemetry-python/pull/4122))
 - Fix use of `link.attributes.dropped`, which may not exist
@@ -29,6 +29,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#4134](https://github.com/open-telemetry/opentelemetry-python/pull/4134))
 - Implement Client Key and Certificate File Support for All OTLP Exporters
   ([#4116](https://github.com/open-telemetry/opentelemetry-python/pull/4116))
+- Implement Client Key and Certificate File Support for All OTLP Exporters
+  ([#4116](https://github.com/open-telemetry/opentelemetry-python/pull/4116))
+- Remove `_start_time_unix_nano` attribute from `_ViewInstrumentMatch` in favor
+  of using `time_ns()` at the moment when the aggregation object is created
+  ([#4137](https://github.com/open-telemetry/opentelemetry-python/pull/4137))
 
 ## Version 1.26.0/0.47b0 (2024-07-25)
 

opentelemetry-sdk/tests/metrics/integration_test/test_time_align.py

@@ -29,7 +29,7 @@ class TestTimeAlign(TestCase):
 
     # This delay is needed for these tests to pass when they are run in
     # Windows.
-    delay = 0.0001
+    delay = 0.001
 
     def test_time_align_cumulative(self):
         reader = InMemoryMetricReader()
@@ -62,6 +62,8 @@ def test_time_align_cumulative(self):
             .metrics[1]
             .data.data_points
         )
+        self.assertEqual(len(data_points_0_0), 2)
+        self.assertEqual(len(data_points_0_1), 2)
 
         self.assertLess(
             data_points_0_0[0].start_time_unix_nano,
@@ -112,6 +114,9 @@ def test_time_align_cumulative(self):
             .data.data_points
         )
 
+        self.assertEqual(len(data_points_1_0), 2)
+        self.assertEqual(len(data_points_1_1), 2)
+
         self.assertLess(
             data_points_1_0[0].start_time_unix_nano,
             data_points_1_0[1].start_time_unix_nano,
@@ -191,6 +196,8 @@ def test_time_align_delta(self):
             .metrics[1]
             .data.data_points
         )
+        self.assertEqual(len(data_points_0_0), 2)
+        self.assertEqual(len(data_points_0_1), 2)
 
         self.assertLess(
             data_points_0_0[0].start_time_unix_nano,
@@ -240,6 +247,8 @@ def test_time_align_delta(self):
             .metrics[1]
             .data.data_points
         )
+        self.assertEqual(len(data_points_1_0), 2)
+        self.assertEqual(len(data_points_1_1), 2)
 
         self.assertEqual(
             data_points_1_0[0].start_time_unix_nano,