chore: import upstream snapshot with attribution

tests/unittests/platform/__init__.py

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+# 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.

tests/unittests/platform/test_time.py

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+# 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.
+
+"""Unit tests for the platform time module."""
+
+import time
+import unittest
+
+from google.adk.platform import time as platform_time
+
+
+class TestTime(unittest.TestCase):
+
+  def tearDown(self) -> None:
+    # Reset provider to default after each test
+    platform_time.reset_time_provider()
+
+  def test_default_time_provider(self) -> None:
+    # Verify it returns a float that is close to now
+    now = time.time()
+    rt_time = platform_time.get_time()
+    self.assertIsInstance(rt_time, float)
+    self.assertAlmostEqual(rt_time, now, delta=1.0)
+
+  def test_custom_time_provider(self) -> None:
+    # Test override
+    mock_time = 123456789.0
+    platform_time.set_time_provider(lambda: mock_time)
+    self.assertEqual(platform_time.get_time(), mock_time)

tests/unittests/platform/test_uuid.py

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+# 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.
+
+"""Unit tests for the platform uuid module."""
+
+import unittest
+import uuid
+
+from google.adk.platform import uuid as platform_uuid
+
+
+class TestUUID(unittest.TestCase):
+
+  def tearDown(self) -> None:
+    # Reset provider to default after each test
+    platform_uuid.reset_id_provider()
+
+  def test_default_id_provider(self) -> None:
+    # Verify it returns a string uuid
+    uid = platform_uuid.new_uuid()
+    self.assertIsInstance(uid, str)
+    # Should be parseable as uuid
+    uuid.UUID(uid)
+
+  def test_custom_id_provider(self) -> None:
+    # Test override
+    mock_id = "test-id-123"
+    platform_uuid.set_id_provider(lambda: mock_id)
+    self.assertEqual(platform_uuid.new_uuid(), mock_id)