[#257] Add policy checker

Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>

api/router_mock_test.go

@@ -11,6 +11,8 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
+const FrostfsNamespaceHeader = "X-Frostfs-Namespace"
+
 type centerMock struct {
 }
 
@@ -18,10 +20,14 @@ func (c *centerMock) Authenticate(*http.Request) (*middleware.Box, error) {
 	return &middleware.Box{}, nil
 }
 
-type requestSettingsMock struct{}
+type middlewareSettingsMock struct{}
 
-func (r *requestSettingsMock) NamespaceHeader() string {
-	return "X-Frostfs-Namespace"
+func (r *middlewareSettingsMock) NamespaceHeader() string {
+	return FrostfsNamespaceHeader
+}
+
+func (r *middlewareSettingsMock) ResolveNamespaceAlias(ns string) string {
+	return ns
 }
 
 type handlerMock struct {
@@ -105,7 +111,7 @@ func (h *handlerMock) PutObjectLegalHoldHandler(http.ResponseWriter, *http.Reque
 
 func (h *handlerMock) PutObjectHandler(w http.ResponseWriter, r *http.Request) {
 	res := &handlerResult{
-		Method:  "PutObject",
+		Method:  middleware.PutObjectOperation,
 		ReqInfo: middleware.GetReqInfo(r.Context()),
 	}