def test__helper_fixture_replaces_real_smbus_implementation(emulated_smbus, tmpdir):
i2c_dev = Path(tmpdir.mkdir('i2c-9999')) # unlikely to be valid
bus = LinuxI2cBus(i2c_dev=i2c_dev)
bus.open()
assert type(bus._smbus) == emulated_smbus
def emulated_device(tmpdir, emulated_smbus):
i2c_dev = Path(tmpdir.mkdir('i2c-0'))
bus = LinuxI2cBus(i2c_dev=i2c_dev)
dev = SmbusDriver(smbus=bus, description='Test', vendor_id=-1,
product_id=-1, address=-1)
return (bus, dev)