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adk-python/tests/unittests/flows/llm_flows/test_transcription_manager.py
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# Copyright 2025 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 unittest.mock import AsyncMock
from unittest.mock import Mock
from google.adk.flows.llm_flows.transcription_manager import TranscriptionManager
from google.genai import types
import pytest
from ... import testing_utils
class TestTranscriptionManager:
"""Test the TranscriptionManager class."""
def setup_method(self):
"""Set up test fixtures."""
self.manager = TranscriptionManager()
@pytest.mark.asyncio
async def test_handle_input_transcription(self):
"""Test handling user input transcription events."""
invocation_context = await testing_utils.create_invocation_context(
testing_utils.create_test_agent()
)
# Set up mock session service
mock_session_service = AsyncMock()
invocation_context.session_service = mock_session_service
# Create test transcription
transcription = types.Transcription(text='Hello from user')
# Handle transcription
await self.manager.handle_input_transcription(
invocation_context, transcription
)
# Verify session service was called
mock_session_service.append_event.assert_called_once()
# Check the event that was created
call_args = mock_session_service.append_event.call_args
event = call_args[0][1] # Second argument is the event
assert event.author == 'user'
assert event.input_transcription == transcription
assert event.output_transcription is None
assert event.invocation_id == invocation_context.invocation_id
assert isinstance(event.timestamp, float)
@pytest.mark.asyncio
async def test_handle_output_transcription(self):
"""Test handling model output transcription events."""
agent = testing_utils.create_test_agent()
invocation_context = await testing_utils.create_invocation_context(agent)
# Set up mock session service
mock_session_service = AsyncMock()
invocation_context.session_service = mock_session_service
# Create test transcription
transcription = types.Transcription(text='Hello from model')
# Handle transcription
await self.manager.handle_output_transcription(
invocation_context, transcription
)
# Verify session service was called
mock_session_service.append_event.assert_called_once()
# Check the event that was created
call_args = mock_session_service.append_event.call_args
event = call_args[0][1] # Second argument is the event
assert event.author == agent.name
assert event.input_transcription is None
assert event.output_transcription == transcription
assert event.invocation_id == invocation_context.invocation_id
assert isinstance(event.timestamp, float)
@pytest.mark.asyncio
async def test_handle_multiple_transcriptions(self):
"""Test handling multiple transcription events."""
invocation_context = await testing_utils.create_invocation_context(
testing_utils.create_test_agent()
)
# Set up mock session service
mock_session_service = AsyncMock()
invocation_context.session_service = mock_session_service
# Handle multiple input transcriptions
for i in range(3):
transcription = types.Transcription(text=f'User message {i}')
await self.manager.handle_input_transcription(
invocation_context, transcription
)
# Handle multiple output transcriptions
for i in range(2):
transcription = types.Transcription(text=f'Model response {i}')
await self.manager.handle_output_transcription(
invocation_context, transcription
)
# Verify session service was called for each transcription
assert mock_session_service.append_event.call_count == 5
@pytest.mark.asyncio
async def test_error_handling_input_transcription(self):
"""Test error handling during input transcription processing."""
invocation_context = await testing_utils.create_invocation_context(
testing_utils.create_test_agent()
)
# Set up mock session service that raises an error
mock_session_service = AsyncMock()
mock_session_service.append_event.side_effect = Exception(
'Session service error'
)
invocation_context.session_service = mock_session_service
# Create test transcription
transcription = types.Transcription(text='Test transcription')
# Handle transcription should raise the exception
with pytest.raises(Exception, match='Session service error'):
await self.manager.handle_input_transcription(
invocation_context, transcription
)
@pytest.mark.asyncio
async def test_error_handling_output_transcription(self):
"""Test error handling during output transcription processing."""
invocation_context = await testing_utils.create_invocation_context(
testing_utils.create_test_agent()
)
# Set up mock session service that raises an error
mock_session_service = AsyncMock()
mock_session_service.append_event.side_effect = Exception(
'Session service error'
)
invocation_context.session_service = mock_session_service
# Create test transcription
transcription = types.Transcription(text='Test transcription')
# Handle transcription should raise the exception
with pytest.raises(Exception, match='Session service error'):
await self.manager.handle_output_transcription(
invocation_context, transcription
)
def test_get_transcription_stats_empty_session(self):
"""Test getting transcription statistics for empty session."""
invocation_context = Mock()
invocation_context.session.events = []
stats = self.manager.get_transcription_stats(invocation_context)
expected = {
'input_transcriptions': 0,
'output_transcriptions': 0,
'total_transcriptions': 0,
}
assert stats == expected
def test_get_transcription_stats_with_events(self):
"""Test getting transcription statistics for session with events."""
invocation_context = Mock()
# Create mock events
input_event1 = Mock()
input_event1.input_transcription = types.Transcription(text='User 1')
input_event1.output_transcription = None
input_event2 = Mock()
input_event2.input_transcription = types.Transcription(text='User 2')
input_event2.output_transcription = None
output_event = Mock()
output_event.input_transcription = None
output_event.output_transcription = types.Transcription(
text='Model response'
)
regular_event = Mock()
regular_event.input_transcription = None
regular_event.output_transcription = None
invocation_context.session.events = [
input_event1,
output_event,
input_event2,
regular_event,
]
stats = self.manager.get_transcription_stats(invocation_context)
expected = {
'input_transcriptions': 2,
'output_transcriptions': 1,
'total_transcriptions': 3,
}
assert stats == expected
def test_get_transcription_stats_missing_attributes(self):
"""Test getting transcription statistics when events don't have transcription attributes."""
invocation_context = Mock()
# Create mock events and explicitly set transcription attributes to None
event1 = Mock()
event1.input_transcription = None
event1.output_transcription = None
event2 = Mock()
event2.input_transcription = None
event2.output_transcription = None
invocation_context.session.events = [event1, event2]
stats = self.manager.get_transcription_stats(invocation_context)
expected = {
'input_transcriptions': 0,
'output_transcriptions': 0,
'total_transcriptions': 0,
}
assert stats == expected
@pytest.mark.asyncio
async def test_transcription_event_fields(self):
"""Test that transcription events have correct field values."""
invocation_context = await testing_utils.create_invocation_context(
testing_utils.create_test_agent()
)
# Set up mock session service
mock_session_service = AsyncMock()
invocation_context.session_service = mock_session_service
# Create test transcription with specific content
transcription = types.Transcription(
text='Test transcription content', finished=True
)
# Handle input transcription
await self.manager.handle_input_transcription(
invocation_context, transcription
)
# Verify the event structure
call_args = mock_session_service.append_event.call_args
event = call_args[0][1]
# Check all required fields are present
assert hasattr(event, 'id')
assert hasattr(event, 'invocation_id')
assert hasattr(event, 'author')
assert hasattr(event, 'input_transcription')
assert hasattr(event, 'output_transcription')
assert hasattr(event, 'timestamp')
# Check values
assert event.id is not None
assert event.invocation_id == invocation_context.invocation_id
assert event.author == 'user'
assert event.input_transcription == transcription
assert event.output_transcription is None
@pytest.mark.asyncio
async def test_transcription_with_different_data_types(self):
"""Test handling transcriptions with different data types."""
invocation_context = await testing_utils.create_invocation_context(
testing_utils.create_test_agent()
)
# Set up mock session service
mock_session_service = AsyncMock()
invocation_context.session_service = mock_session_service
# Test with transcription that has basic fields only
transcription = types.Transcription(
text='Advanced transcription', finished=True
)
# Handle transcription
await self.manager.handle_input_transcription(
invocation_context, transcription
)
# Verify the transcription object is preserved as-is
call_args = mock_session_service.append_event.call_args
event = call_args[0][1]
assert event.input_transcription == transcription
assert event.input_transcription.text == 'Advanced transcription'