chore: import upstream snapshot with attribution

tests/unittests/sessions/test_v0_storage_event.py

@@ -0,0 +1,127 @@
+# 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.
+
+from datetime import datetime
+from datetime import timezone
+
+from google.adk.events.event import Event
+from google.adk.events.event_actions import EventActions
+from google.adk.events.event_actions import EventCompaction
+from google.adk.sessions.schemas.shared import DEFAULT_MAX_VARCHAR_LENGTH
+from google.adk.sessions.schemas.v0 import _truncate_str
+from google.adk.sessions.schemas.v0 import StorageEvent
+from google.adk.sessions.session import Session
+from google.genai import types
+
+
+def test_storage_event_v0_to_event_rehydrates_compaction_model():
+  compaction = EventCompaction(
+      start_timestamp=1.0,
+      end_timestamp=2.0,
+      compacted_content=types.Content(
+          role="user",
+          parts=[types.Part(text="compacted")],
+      ),
+  )
+  actions = EventActions(compaction=compaction)
+  storage_event = StorageEvent(
+      id="event_id",
+      invocation_id="invocation_id",
+      author="author",
+      actions=actions,
+      session_id="session_id",
+      app_name="app_name",
+      user_id="user_id",
+      timestamp=datetime.fromtimestamp(3.0, tz=timezone.utc),
+  )
+
+  event = storage_event.to_event()
+
+  assert event.actions is not None
+  assert isinstance(event.actions.compaction, EventCompaction)
+  assert event.actions.compaction.start_timestamp == 1.0
+  assert event.actions.compaction.end_timestamp == 2.0
+
+
+def test_truncate_str_returns_none_for_none():
+  assert _truncate_str(None, 256) is None
+
+
+def test_truncate_str_returns_short_string_unchanged():
+  short = "short message"
+  assert _truncate_str(short, 256) == short
+
+
+def test_truncate_str_returns_exact_length_string_unchanged():
+  exact = "a" * DEFAULT_MAX_VARCHAR_LENGTH
+  assert _truncate_str(exact, DEFAULT_MAX_VARCHAR_LENGTH) == exact
+
+
+def test_truncate_str_truncates_long_string():
+  long_msg = "x" * 1000
+  result = _truncate_str(long_msg, DEFAULT_MAX_VARCHAR_LENGTH)
+  assert result is not None
+  assert len(result) == DEFAULT_MAX_VARCHAR_LENGTH
+  assert result.endswith("...[truncated]")
+
+
+def test_from_event_truncates_long_error_message():
+  long_error = "Malformed function call: " + "a" * 1000
+  session = Session(
+      app_name="app",
+      user_id="user",
+      id="session_id",
+      state={},
+      events=[],
+      last_update_time=0.0,
+  )
+  event = Event(
+      id="event_id",
+      invocation_id="inv_id",
+      author="agent",
+      timestamp=1.0,
+      error_code="MALFORMED_FUNCTION_CALL",
+      error_message=long_error,
+  )
+
+  storage_event = StorageEvent.from_event(session, event)
+
+  assert storage_event.error_message is not None
+  assert len(storage_event.error_message) == DEFAULT_MAX_VARCHAR_LENGTH
+  assert storage_event.error_message.endswith("...[truncated]")
+  assert storage_event.error_code == "MALFORMED_FUNCTION_CALL"
+
+
+def test_from_event_preserves_short_error_message():
+  short_error = "Something went wrong"
+  session = Session(
+      app_name="app",
+      user_id="user",
+      id="session_id",
+      state={},
+      events=[],
+      last_update_time=0.0,
+  )
+  event = Event(
+      id="event_id",
+      invocation_id="inv_id",
+      author="agent",
+      timestamp=1.0,
+      error_code="SOME_ERROR",
+      error_message=short_error,
+  )
+
+  storage_event = StorageEvent.from_event(session, event)
+
+  assert storage_event.error_message == short_error