public void IncorrectMessage()
 {
     try
     {
         var ex = new JsonErrorException(" hello");
         Assert.Fail();
     }
     catch (Exception e)
     {
         Assert.IsInstanceOfType(e, typeof(InvalidCastException));
     }
 }
 public void CorrectMessage()
 {
     var ex = new JsonErrorException("401 - Bad Request");
     Assert.AreEqual(ex.Code, 401);
 }