text: """Test the init file of Twilio."""
  from unittest.mock import patch
  
  from homeassistant import data_entry_flow
  from homeassistant.components import twilio
  from homeassistant.core import callback
  from tests.common import MockDependency
  
  
  async def test_config_flow_registers_webhook(hass, aiohttp_client):
      """Test setting up Twilio and sending webhook."""
      with MockDependency("twilio", "rest"), MockDependency("twilio", "twiml"):
          with patch("homeassistant.util.get_local_ip", return_value="example.com"):
              result = await hass.config_entries.flow.async_init(
                  "twilio", context={"source": "user"}
              )
          assert result["type"] == data_entry_flow.RESULT_TYPE_FORM, result
  
          result = await hass.config_entries.flow.async_configure(result["flow_id"], {})
          assert result["type"] == data_entry_flow.RESULT_TYPE_CREATE_ENTRY
          webhook_id = result["result"].data["webhook_id"]
  
          twilio_events = []
  
          @callback
          def handle_event(event):
              """Handle Twilio event."""
              twilio_events.append(event)
  
          hass.bus.async_listen(twilio.RECEIVED_DATA, handle_event)
  
          client = await aiohttp_client(hass.http.app)
          await client.post(
              "/api/webhook/{}".format(webhook_id), data={"hello": "twilio"}
          )
  
          assert len(twilio_events) == 1
          assert twilio_events[0].data["webhook_id"] == webhook_id
          assert twilio_events[0].data["hello"] == "twilio"
  