public void VMNotificator_AddError_Must_Add_Error_By_String()
        {
            //Arrange
            var errorMessage = "Error Message";
            var errorCode    = "001";

            //Act
            _notificator.AddError(errorMessage, errorCode);

            //Assert
            var result = _notificator.GetErrors();

            result.Should().Contain(new Notification(errorMessage, errorCode));
        }