added tests

1 files changed, 7 insertions, 0 deletions

diff --git a/xgb_help.go b/xgb_help.go
index b54ab41..6d07938 100644
--- a/xgb_help.go
+++ b/xgb_help.go
@@ -1,6 +1,7 @@
 package xgb
 
 import (
+	"errors"
 	"fmt"
 	"strings"
 )
@@ -16,6 +17,12 @@ func sprintf(format string, v ...interface{}) string {
 	return fmt.Sprintf(format, v...)
 }
 
+// newError is just a wrapper for errors.New. Exists for the same reason
+// that 'stringsJoin' and 'sprintf' exists.
+func newError(format string, v ...interface{}) error {
+	return errors.New(fmt.Sprintf(format, v...))
+}
+
 // Pad a length to align on 4 bytes.
 func pad(n int) int {
 	return (n + 3) & ^3