chore: import upstream snapshot with attribution

tests/unittests/telemetry/test_instrumentation.py

@@ -0,0 +1,82 @@
+# Copyright 2026 Google LLC
+#
+# 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
+
+import time
+from unittest import mock
+
+from google.adk.telemetry import _metrics
+from opentelemetry import trace
+
+
+def test_get_elapsed_s_span_none():
+  """Tests fallback when span is None."""
+  start_time = 10.0
+  with mock.patch("time.monotonic", return_value=12.0):
+    elapsed = _metrics.get_elapsed_s(None, start_time)
+  assert elapsed == 2.0  # 12 - 10
+
+
+def test_get_elapsed_s_span_valid():
+  """Tests duration calculation with valid span times."""
+  mock_span = mock.MagicMock(spec=trace.Span)
+  mock_span.start_time = 1000000000  # 1s in ns
+  mock_span.end_time = 2000000000  # 2s in ns
+  elapsed = _metrics.get_elapsed_s(mock_span, time.monotonic())
+  assert elapsed == 1.0  # (2 - 1) s
+
+
+def test_get_elapsed_s_span_missing_start():
+  """Tests fallback when start_time is missing."""
+  mock_span = mock.MagicMock(spec=trace.Span)
+  del mock_span.start_time
+  mock_span.end_time = 2000000000
+  start_time = 10.0
+  with mock.patch("time.monotonic", return_value=12.0):
+    elapsed = _metrics.get_elapsed_s(mock_span, start_time)
+  assert elapsed == 2.0
+
+
+def test_get_elapsed_s_span_missing_end():
+  """Tests fallback when end_time is missing."""
+  mock_span = mock.MagicMock(spec=trace.Span)
+  mock_span.start_time = 1000000000
+  del mock_span.end_time
+  start_time = 10.0
+  with mock.patch("time.monotonic", return_value=12.0):
+    elapsed = _metrics.get_elapsed_s(mock_span, start_time)
+  assert elapsed == 2.0
+
+
+def test_get_elapsed_s_span_non_int_start():
+  """Tests fallback when start_time is not an integer."""
+  mock_span = mock.MagicMock(spec=trace.Span)
+  mock_span.start_time = 1000000000.0
+  mock_span.end_time = 2000000000
+  start_time = 10.0
+  with mock.patch("time.monotonic", return_value=12.0):
+    elapsed = _metrics.get_elapsed_s(mock_span, start_time)
+  assert elapsed == 2.0
+
+
+def test_get_elapsed_s_span_non_int_end():
+  """Tests fallback when end_time is not an integer."""
+  mock_span = mock.MagicMock(spec=trace.Span)
+  mock_span.start_time = 1000000000
+  mock_span.end_time = 2000000000.0
+  start_time = 10.0
+  with mock.patch("time.monotonic", return_value=12.0):
+    elapsed = _metrics.get_elapsed_s(mock_span, start_time)
+  assert elapsed == 2.0