test: check and handle error for testing

internal/middleware/forwardedfor_test.go

@@ -1,10 +1,11 @@
 package middleware
 
 import (
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/mock"
 	"net"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/mock"
 )
 
 type mockRequestHeader struct {

internal/middleware/tunnelfingerprint_test.go

@@ -1,9 +1,10 @@
 package middleware
 
 import (
+	"testing"
+
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/mock"
-	"testing"
 )
 
 type mockResponseHeader struct {