Files
claude-agent-sdk-python/tests/test_tool_callbacks.py
2025-09-28 14:52:53 -07:00

290 lines
8.8 KiB
Python

"""Tests for tool permission callbacks and hook callbacks."""
import pytest
from claude_agent_sdk import (
ClaudeAgentOptions,
HookContext,
HookMatcher,
PermissionResultAllow,
PermissionResultDeny,
ToolPermissionContext,
)
from claude_agent_sdk._internal.query import Query
from claude_agent_sdk._internal.transport import Transport
class MockTransport(Transport):
"""Mock transport for testing."""
def __init__(self):
self.written_messages = []
self.messages_to_read = []
self._connected = False
async def connect(self) -> None:
self._connected = True
async def close(self) -> None:
self._connected = False
async def write(self, data: str) -> None:
self.written_messages.append(data)
async def end_input(self) -> None:
pass
def read_messages(self):
async def _read():
for msg in self.messages_to_read:
yield msg
return _read()
def is_ready(self) -> bool:
return self._connected
class TestToolPermissionCallbacks:
"""Test tool permission callback functionality."""
@pytest.mark.asyncio
async def test_permission_callback_allow(self):
"""Test callback that allows tool execution."""
callback_invoked = False
async def allow_callback(
tool_name: str, input_data: dict, context: ToolPermissionContext
) -> PermissionResultAllow:
nonlocal callback_invoked
callback_invoked = True
assert tool_name == "TestTool"
assert input_data == {"param": "value"}
return PermissionResultAllow()
transport = MockTransport()
query = Query(
transport=transport,
is_streaming_mode=True,
can_use_tool=allow_callback,
hooks=None,
)
# Simulate control request
request = {
"type": "control_request",
"request_id": "test-1",
"request": {
"subtype": "can_use_tool",
"tool_name": "TestTool",
"input": {"param": "value"},
"permission_suggestions": [],
},
}
await query._handle_control_request(request)
# Check callback was invoked
assert callback_invoked
# Check response was sent
assert len(transport.written_messages) == 1
response = transport.written_messages[0]
assert '"allow": true' in response
@pytest.mark.asyncio
async def test_permission_callback_deny(self):
"""Test callback that denies tool execution."""
async def deny_callback(
tool_name: str, input_data: dict, context: ToolPermissionContext
) -> PermissionResultDeny:
return PermissionResultDeny(message="Security policy violation")
transport = MockTransport()
query = Query(
transport=transport,
is_streaming_mode=True,
can_use_tool=deny_callback,
hooks=None,
)
request = {
"type": "control_request",
"request_id": "test-2",
"request": {
"subtype": "can_use_tool",
"tool_name": "DangerousTool",
"input": {"command": "rm -rf /"},
"permission_suggestions": ["deny"],
},
}
await query._handle_control_request(request)
# Check response
assert len(transport.written_messages) == 1
response = transport.written_messages[0]
assert '"allow": false' in response
assert '"reason": "Security policy violation"' in response
@pytest.mark.asyncio
async def test_permission_callback_input_modification(self):
"""Test callback that modifies tool input."""
async def modify_callback(
tool_name: str, input_data: dict, context: ToolPermissionContext
) -> PermissionResultAllow:
# Modify the input to add safety flag
modified_input = input_data.copy()
modified_input["safe_mode"] = True
return PermissionResultAllow(updated_input=modified_input)
transport = MockTransport()
query = Query(
transport=transport,
is_streaming_mode=True,
can_use_tool=modify_callback,
hooks=None,
)
request = {
"type": "control_request",
"request_id": "test-3",
"request": {
"subtype": "can_use_tool",
"tool_name": "WriteTool",
"input": {"file_path": "/etc/passwd"},
"permission_suggestions": [],
},
}
await query._handle_control_request(request)
# Check response includes modified input
assert len(transport.written_messages) == 1
response = transport.written_messages[0]
assert '"allow": true' in response
assert '"safe_mode": true' in response
@pytest.mark.asyncio
async def test_callback_exception_handling(self):
"""Test that callback exceptions are properly handled."""
async def error_callback(
tool_name: str, input_data: dict, context: ToolPermissionContext
) -> PermissionResultAllow:
raise ValueError("Callback error")
transport = MockTransport()
query = Query(
transport=transport,
is_streaming_mode=True,
can_use_tool=error_callback,
hooks=None,
)
request = {
"type": "control_request",
"request_id": "test-5",
"request": {
"subtype": "can_use_tool",
"tool_name": "TestTool",
"input": {},
"permission_suggestions": [],
},
}
await query._handle_control_request(request)
# Check error response was sent
assert len(transport.written_messages) == 1
response = transport.written_messages[0]
assert '"subtype": "error"' in response
assert "Callback error" in response
class TestHookCallbacks:
"""Test hook callback functionality."""
@pytest.mark.asyncio
async def test_hook_execution(self):
"""Test that hooks are called at appropriate times."""
hook_calls = []
async def test_hook(
input_data: dict, tool_use_id: str | None, context: HookContext
) -> dict:
hook_calls.append({"input": input_data, "tool_use_id": tool_use_id})
return {"processed": True}
transport = MockTransport()
# Create hooks configuration
hooks = {
"tool_use_start": [{"matcher": {"tool": "TestTool"}, "hooks": [test_hook]}]
}
query = Query(
transport=transport, is_streaming_mode=True, can_use_tool=None, hooks=hooks
)
# Manually register the hook callback to avoid needing the full initialize flow
callback_id = "test_hook_0"
query.hook_callbacks[callback_id] = test_hook
# Simulate hook callback request
request = {
"type": "control_request",
"request_id": "test-hook-1",
"request": {
"subtype": "hook_callback",
"callback_id": callback_id,
"input": {"test": "data"},
"tool_use_id": "tool-123",
},
}
await query._handle_control_request(request)
# Check hook was called
assert len(hook_calls) == 1
assert hook_calls[0]["input"] == {"test": "data"}
assert hook_calls[0]["tool_use_id"] == "tool-123"
# Check response
assert len(transport.written_messages) > 0
last_response = transport.written_messages[-1]
assert '"processed": true' in last_response
class TestClaudeAgentOptionsIntegration:
"""Test that callbacks work through ClaudeAgentOptions."""
def test_options_with_callbacks(self):
"""Test creating options with callbacks."""
async def my_callback(
tool_name: str, input_data: dict, context: ToolPermissionContext
) -> PermissionResultAllow:
return PermissionResultAllow()
async def my_hook(
input_data: dict, tool_use_id: str | None, context: HookContext
) -> dict:
return {}
options = ClaudeAgentOptions(
can_use_tool=my_callback,
hooks={
"tool_use_start": [
HookMatcher(matcher={"tool": "Bash"}, hooks=[my_hook])
]
},
)
assert options.can_use_tool == my_callback
assert "tool_use_start" in options.hooks
assert len(options.hooks["tool_use_start"]) == 1
assert options.hooks["tool_use_start"][0].hooks[0] == my_hook