def test_persist():
dev = dummy()
assert dev.persist is False
with patch.object(dev, 'hide') as mock:
dev.cleanup()
mock.assert_called_once_with()
dev = dummy()
dev.persist = True
with patch.object(dev, 'hide') as mock:
dev.cleanup()
mock.assert_not_called()
def test_init_no_bus():
with patch.object(smbus2.SMBus, 'open') as mock:
i2c(port=2, address=0x71)
mock.assert_called_once_with(2)