Add test code for new connect error

Co-authored-by: Yourim Cha <chacha912@users.noreply.github.com>
Co-authored-by: Youngteac Hong <susukang98@gmail.com>

server/rpc/interceptors/admin_auth.go

@@ -31,6 +31,9 @@ import (
 	"github.com/yorkie-team/yorkie/server/users"
 )
 
+// ErrUnauthenticated is returned when authentication is failed.
+var ErrUnauthenticated = errors.New("authorization is not provided")
+
 // AdminAuthInterceptor is an interceptor for authentication.
 type AdminAuthInterceptor struct {
 	backend      *backend.Backend
@@ -155,17 +158,17 @@ func (i *AdminAuthInterceptor) authenticate(
 ) (*types.User, error) {
 	authorization := header.Get(types.AuthorizationKey)
 	if authorization == "" {
-		return nil, connect.NewError(connect.CodeUnauthenticated, errors.New("authorization is not provided"))
+		return nil, connect.NewError(connect.CodeUnauthenticated, ErrUnauthenticated)
 	}
 
 	claims, err := i.tokenManager.Verify(authorization)
 	if err != nil {
-		return nil, connect.NewError(connect.CodeUnauthenticated, errors.New("authorization is invalid"))
+		return nil, connect.NewError(connect.CodeUnauthenticated, ErrUnauthenticated)
 	}
 
 	user, err := users.GetUser(ctx, i.backend, claims.Username)
 	if err != nil {
-		return nil, connect.NewError(connect.CodeUnauthenticated, errors.New("authorization is invalid"))
+		return nil, connect.NewError(connect.CodeUnauthenticated, ErrUnauthenticated)
 	}
 
 	return user, nil

test/integration/admin_test.go

@@ -148,4 +148,17 @@ func TestAdmin(t *testing.T) {
 		assert.NoError(t, err)
 		assert.Equal(t, document.StatusDetached, doc.Status())
 	})
+
+	t.Run("unauthentication test", func(t *testing.T) {
+		// 01. try to call admin API without token.
+		adminCli2, err := admin.Dial(defaultServer.RPCAddr(), admin.WithInsecure(true))
+		assert.NoError(t, err)
+		defer func() {
+			adminCli2.Close()
+		}()
+		_, err = adminCli2.GetProject(ctx, "default")
+
+		// 02. server should return unauthenticated error.
+		assert.Equal(t, connect.CodeUnauthenticated, connect.CodeOf(err))
+	})
 }