fix(tests): resolve linting issues in telemetry tests

tests/integration/telemetry/collectors/base.py

@@ -6,7 +6,7 @@
 
 """Shared helpers for telemetry test collectors."""
 
-from collections.abc import Iterable
+from collections.abc import Iterable, Mapping
 from dataclasses import dataclass
 from typing import Any
 
@@ -14,7 +14,7 @@ from typing import Any
 @dataclass
 class SpanStub:
     name: str
-    attributes: dict[str, Any]
+    attributes: Mapping[str, Any] | None = None
     resource_attributes: dict[str, Any] | None = None
     events: list[dict[str, Any]] | None = None
     trace_id: str | None = None

tests/integration/telemetry/collectors/in_memory.py

@@ -55,9 +55,12 @@ class InMemoryTelemetryCollector(BaseTelemetryCollector):
     def _snapshot_metrics(self) -> Any | None:
         data = self._metric_reader.get_metrics_data()
         if data and data.resource_metrics:
-            resource_metric = data.resource_metrics[0]
-            if resource_metric.scope_metrics:
-                return resource_metric.scope_metrics[0].metrics
+            all_metrics = []
+            for resource_metric in data.resource_metrics:
+                if resource_metric.scope_metrics:
+                    for scope_metric in resource_metric.scope_metrics:
+                        all_metrics.extend(scope_metric.metrics)
+            return all_metrics if all_metrics else None
         return None
 
     def _clear_impl(self) -> None: