add error handling for func AsEntryXpath

pkg/translate/funcs.go

@@ -1,12 +1,16 @@
 package translate
 
 import (
+	"errors"
 	"github.com/paloaltonetworks/pan-os-codegen/pkg/naming"
 	"strings"
 )
 
-func AsEntryXpath(location, xpath string) string {
+func AsEntryXpath(location, xpath string) (string, error) {
+	if !strings.Contains(xpath, "$") || !strings.Contains(xpath, "}") {
+		return "", errors.New("$ followed by } should exists in xpath'")
+	}
 	xpath = strings.TrimSpace(strings.Split(strings.Split(xpath, "$")[1], "}")[0])
 	xpath = naming.CamelCase("", xpath, "", true)
-	return "util.AsEntryXpath([]string{o." + location + "." + xpath + "}),"
+	return "util.AsEntryXpath([]string{o." + location + "." + xpath + "}),", nil
 }

pkg/translate/funcs_test.go

@@ -9,7 +9,7 @@ func TestAsEntryXpath(t *testing.T) {
 	// given
 
 	// when
-	asEntryXpath := AsEntryXpath("DeviceGroup", "{{ Entry $panorama_device }}")
+	asEntryXpath, _ := AsEntryXpath("DeviceGroup", "{{ Entry $panorama_device }}")
 
 	// then
 	assert.Equal(t, "util.AsEntryXpath([]string{o.DeviceGroup.PanoramaDevice}),", asEntryXpath)