## my test

async def test_setup_platform(hass, config_entry, config):
    await setup_platform(hass, SWITCH_DOMAIN, config)
    entity_registry = await hass.helpers.entity_registry.async_get_registry()
    entry = entity_registry.async_get("switch.front_door_siren")
    assert entry


## conftest.py

@pytest.fixture(name="config_entry")
def config_entry_fixture():
    """Create a mock ring config entry."""
    return MockConfigEntry(domain=DOMAIN, data={CONF_USERNAME: 'foo',
    CONF_PASSWORD: 'bar', CONF_SCAN_INTERVAL: 1000}, title='Ring')

@pytest.fixture(name="config")
def config_fixture():
    """Create hass config fixture."""
    return {
        DOMAIN: {CONF_USERNAME: 'foo',
    CONF_PASSWORD: 'bar', CONF_SCAN_INTERVAL: 1000}
    }

async def setup_platform(hass, platform,config):
    """Set up the SmartThings platform and prerequisites."""
    hass.config.components.add(DOMAIN)
    assert await async_setup_component(hass, DOMAIN, config)
    await hass.async_block_till_done()