add check protovalidate env method

backend/gopkgs/middlewares/protobufvalidator/middleware.go

@@ -8,6 +8,28 @@
 	"google.golang.org/protobuf/proto"
 )
 
+func doValidate(req proto.Message) error {
+	v, err := protovalidate.New()
+	if err != nil {
+		return err
+	}
+
+	if err := v.Validate(req); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func CheckEnv() error {
+	_, err := protovalidate.New()
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
 func ProtobufValidator() middleware.Middleware {
 	return func(handler middleware.Handler) middleware.Handler {
 		return func(ctx context.Context, req interface{}) (interface{}, error) {
@@ -16,12 +38,7 @@
 				return nil, errors.New("not valid request")
 			}
 
-			v, err := protovalidate.New()
-			if err != nil {
-				return nil, err
-			}
-
-			if err := v.Validate(value); err != nil {
+			if err := doValidate(value); err != nil {
 				return nil, err
 			}
 

backend/gopkgs/middlewares/protobufvalidator/middleware_test.go

@@ -0,0 +1,13 @@
+package protobufvalidator
+
+import (
+	"github.com/stretchr/testify/assert"
+	"google.golang.org/protobuf/proto"
+	"testing"
+)
+
+func Test_doValidate(t *testing.T) {
+	req := proto.Message(nil)
+	err := doValidate(req)
+	assert.Nil(t, err)
+}