Code cleanup and deduplication pass through weatherfeeder

internal/sources/builtins_test.go

@@ -47,13 +47,42 @@ func TestRegisterBuiltinsDoesNotRegisterLegacyNWSForecastDriver(t *testing.T) {
 	}
 }
 
+func TestRegisterBuiltinsRegistersAllCurrentDrivers(t *testing.T) {
+	reg := fksource.NewRegistry()
+	RegisterBuiltins(reg)
+
+	drivers := []string{
+		"nws_observation",
+		"nws_alerts",
+		"nws_forecast_hourly",
+		"nws_forecast_narrative",
+		"openmeteo_observation",
+		"openmeteo_forecast",
+		"openweather_observation",
+	}
+
+	for _, driver := range drivers {
+		in, err := reg.BuildInput(sourceConfigForDriver(driver))
+		if err != nil {
+			t.Fatalf("BuildInput(%s) error = %v", driver, err)
+		}
+		if _, ok := in.(fksource.PollSource); !ok {
+			t.Fatalf("BuildInput(%s) type = %T, want PollSource", driver, in)
+		}
+	}
+}
+
 func sourceConfigForDriver(driver string) config.SourceConfig {
+	url := "https://example.invalid"
+	if driver == "openweather_observation" {
+		url = "https://example.invalid?units=metric"
+	}
 	return config.SourceConfig{
 		Name:   "test-source",
 		Driver: driver,
 		Mode:   config.SourceModePoll,
 		Params: map[string]any{
-			"url":        "https://example.invalid",
+			"url":        url,
 			"user_agent": "test-agent",
 		},
 	}