Enhance documentation for API client and vehicle structures; improve test function naming for clarity

utils.go

@@ -58,7 +58,7 @@ func vinCheck(vin string) (bool, string) {
 	return valid, retVin
 }
 
-// transcodeDigits .
+// transcodeDigits transcodes VIN digits to a numeric value
 func transcodeDigits(vin string) int {
 	var digitSum = 0
 	var code int
@@ -114,30 +114,8 @@ func transcodeDigits(vin string) int {
 	return digitSum
 }
 
-// isNilFixed .
-// func isNil(i interface{}) bool {
-// 	if i == nil {
-// 		return true
-// 	}
-// 	switch reflect.TypeOf(i).Kind() {
-// 	case reflect.Ptr, reflect.Map, reflect.Array, reflect.Chan, reflect.Slice:
-// 		return reflect.ValueOf(i).IsNil()
-// 	}
-// 	return false
-// }
-
 // timeTrack .
 // func timeTrack(name string) {
 // 	start := time.Now()
 // 	fmt.Printf("%s took %v\n", name, time.Since(start))
 // }
-
-// contains .
-// func contains(s []string, str string) bool {
-// 	for _, v := range s {
-// 		if v == str {
-// 			return true
-// 		}
-// 	}
-// 	return false
-// }