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Copy pathtest_llm_agent_error_messages.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.
"""Tests for enhanced error messages in agent handling."""
from google.adk.agents import LlmAgent
import pytest
def test_agent_not_found_enhanced_error():
"""Verify enhanced error message for agent not found."""
root_agent = LlmAgent(
name='root',
model='gemini-2.0-flash',
sub_agents=[
LlmAgent(name='agent_a', model='gemini-2.0-flash'),
LlmAgent(name='agent_b', model='gemini-2.0-flash'),
],
)
with pytest.raises(ValueError) as exc_info:
root_agent._LlmAgent__get_agent_to_run('nonexistent_agent')
error_msg = str(exc_info.value)
# Verify error message components
assert 'nonexistent_agent' in error_msg
assert 'Available agents:' in error_msg
assert 'agent_a' in error_msg
assert 'agent_b' in error_msg
assert 'Possible causes:' in error_msg
assert 'Suggested fixes:' in error_msg
def test_agent_tree_traversal():
"""Verify agent tree traversal helper works correctly."""
root_agent = LlmAgent(
name='orchestrator',
model='gemini-2.0-flash',
sub_agents=[
LlmAgent(
name='parent_agent',
model='gemini-2.0-flash',
sub_agents=[
LlmAgent(name='child_agent', model='gemini-2.0-flash'),
],
),
],
)
available_agents = root_agent._get_available_agent_names()
# Verify all agents in tree are found
assert 'orchestrator' in available_agents
assert 'parent_agent' in available_agents
assert 'child_agent' in available_agents
assert len(available_agents) == 3
def test_agent_not_found_shows_all_agents():
"""Verify error message shows all agents (no truncation)."""
# Create 100 sub-agents
sub_agents = [
LlmAgent(name=f'agent_{i}', model='gemini-2.0-flash') for i in range(100)
]
root_agent = LlmAgent(
name='root', model='gemini-2.0-flash', sub_agents=sub_agents
)
with pytest.raises(ValueError) as exc_info:
root_agent._LlmAgent__get_agent_to_run('nonexistent')
error_msg = str(exc_info.value)
# Verify all agents are shown (no truncation)
assert 'agent_0' in error_msg # First agent shown
assert 'agent_99' in error_msg # Last agent also shown
assert 'showing first 20 of' not in error_msg # No truncation message