Do not activate Met.no without setting a Home coordinates (#48741)

tests/components/met/test_config_flow.py

@@ -4,6 +4,7 @@ from unittest.mock import patch
 import pytest
 
 from homeassistant.components.met.const import DOMAIN, HOME_LOCATION_NAME
+from homeassistant.config import async_process_ha_core_config
 from homeassistant.const import CONF_ELEVATION, CONF_LATITUDE, CONF_LONGITUDE
 
 from tests.common import MockConfigEntry
@@ -106,6 +107,25 @@ async def test_onboarding_step(hass):
     assert result["data"] == {"track_home": True}
 
 
+@pytest.mark.parametrize("latitude,longitude", [(52.3731339, 4.8903147), (0.0, 0.0)])
+async def test_onboarding_step_abort_no_home(hass, latitude, longitude):
+    """Test entry not created when default step fails."""
+    await async_process_ha_core_config(
+        hass,
+        {"latitude": latitude, "longitude": longitude},
+    )
+
+    assert hass.config.latitude == latitude
+    assert hass.config.longitude == longitude
+
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": "onboarding"}, data={}
+    )
+
+    assert result["type"] == "abort"
+    assert result["reason"] == "no_home"
+
+
 async def test_import_step(hass):
     """Test initializing via import step."""
     test_data = {