Change validate method to IsPathKind function

pkg/sanity/sanity.go

@@ -470,12 +470,16 @@ const (
 	PathIsOther    PathKind = "other"
 )
 
-func (pk PathKind) validate() error {
+// IsPathKind validates that the input string matches one of the defined
+// PathKind values above. If successful, it returns the corresponding
+// PathKind type. Otherwise, it returns an error.
+func IsPathKind(in string) (PathKind, error) {
+	pk := PathKind(in)
 	switch pk {
 	case PathIsFile, PathIsDir, PathIsNotFound, PathIsOther:
-		return nil
+		return pk, nil
 	default:
-		return fmt.Errorf("invalid PathType: %s", pk)
+		return pk, fmt.Errorf("invalid PathType: %s", pk)
 	}
 }
 
@@ -528,8 +532,8 @@ func CheckPath(path string, config *TestConfig) (PathKind, error) {
 		}
 		// The output of this command is expected to match the value for
 		// PathIsFile, PathIsDir, PathIsNotFound, or PathIsOther.
-		pk := PathKind(strings.TrimSpace(string(out)))
-		if err = pk.validate(); err != nil {
+		pk, err := IsPathKind(strings.TrimSpace(string(out)))
+		if err != nil {
 			return "", fmt.Errorf("check path command %s failed: %v", config.CheckPathCmd, err)
 		}
 		return pk, nil