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import importlib
from unittest.mock import patch
import pytest
import can
from can.interfaces import BACKENDS
@pytest.fixture(params=(BACKENDS.keys()))
def constructor(request):
mod, cls = BACKENDS[request.param]
try:
module = importlib.import_module(mod)
constructor = getattr(module, cls)
except:
pytest.skip("Unable to load interface")
return constructor
@pytest.fixture
def interface(constructor):
class MockInterface(constructor):
def __init__(self):
pass
def __del__(self):
pass
return MockInterface()
@patch.object(can.bus.BusABC, "shutdown")
def test_interface_calls_parent_shutdown(mock_shutdown, interface):
try:
interface.shutdown()
except:
pass
finally:
mock_shutdown.assert_called()
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