Improve AirNow Configuration Error Handling (#97267)

* Fix config flow error handling when no data is returned by AirNow API

* Add test for PyAirNow EmptyResponseError

* Typo Fix

homeassistant/components/airnow/config_flow.py

@@ -2,7 +2,7 @@
 import logging
 
 from pyairnow import WebServiceAPI
-from pyairnow.errors import AirNowError, InvalidKeyError
+from pyairnow.errors import AirNowError, EmptyResponseError, InvalidKeyError
 import voluptuous as vol
 
 from homeassistant import config_entries, core, exceptions
@@ -35,6 +35,8 @@ async def validate_input(hass: core.HomeAssistant, data):
         raise InvalidAuth from exc
     except AirNowError as exc:
         raise CannotConnect from exc
+    except EmptyResponseError as exc:
+        raise InvalidLocation from exc
 
     if not test_data:
         raise InvalidLocation

homeassistant/components/airnow/strings.json

@@ -14,7 +14,7 @@
     "error": {
       "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]",
       "invalid_auth": "[%key:common::config_flow::error::invalid_auth%]",
-      "invalid_location": "No results found for that location",
+      "invalid_location": "No results found for that location, try changing the location or station radius.",
       "unknown": "[%key:common::config_flow::error::unknown%]"
     },
     "abort": {

tests/components/airnow/test_config_flow.py

@@ -1,7 +1,7 @@
 """Test the AirNow config flow."""
 from unittest.mock import AsyncMock
 
-from pyairnow.errors import AirNowError, InvalidKeyError
+from pyairnow.errors import AirNowError, EmptyResponseError, InvalidKeyError
 import pytest
 
 from homeassistant import config_entries, data_entry_flow
@@ -55,6 +55,17 @@ async def test_form_cannot_connect(hass: HomeAssistant, config, setup_airnow) ->
     assert result2["errors"] == {"base": "cannot_connect"}
 
 
+@pytest.mark.parametrize("mock_api_get", [AsyncMock(side_effect=EmptyResponseError)])
+async def test_form_empty_result(hass: HomeAssistant, config, setup_airnow) -> None:
+    """Test we handle empty response error."""
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": config_entries.SOURCE_USER}
+    )
+    result2 = await hass.config_entries.flow.async_configure(result["flow_id"], config)
+    assert result2["type"] == "form"
+    assert result2["errors"] == {"base": "invalid_location"}
+
+
 @pytest.mark.parametrize("mock_api_get", [AsyncMock(side_effect=RuntimeError)])
 async def test_form_unexpected(hass: HomeAssistant, config, setup_airnow) -> None:
     """Test we handle an unexpected error."""