Delay salt initialization for audit backends

audit/format_jsonx_test.go

@@ -13,6 +13,13 @@ import (
 )
 
 func TestFormatJSONx_formatRequest(t *testing.T) {
+	salter, err := salt.NewSalt(nil, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	saltFunc := func() (*salt.Salt, error) {
+		return salter, nil
+	}
 	cases := map[string]struct {
 		Auth     *logical.Auth
 		Req      *logical.Request
@@ -67,12 +74,11 @@ func TestFormatJSONx_formatRequest(t *testing.T) {
 		var buf bytes.Buffer
 		formatter := AuditFormatter{
 			AuditFormatWriter: &JSONxFormatWriter{
-				Prefix: tc.Prefix,
+				Prefix:   tc.Prefix,
+				SaltFunc: saltFunc,
 			},
 		}
-		salter, _ := salt.NewSalt(nil, nil)
 		config := FormatterConfig{
-			Salt:     salter,
 			OmitTime: true,
 		}
 		if err := formatter.FormatRequest(&buf, config, tc.Auth, tc.Req, tc.Err); err != nil {