public void CombineErrorMessages_Default_HasModelErrors() { var msd = new ModelStateDictionary { MaxAllowedErrors = 35 }; msd.AddModelError("996", "Jack Ma is an asshole"); msd.AddModelError("251", "Use HW and be a patriot"); var result = msd.CombineErrorMessages(); Assert.IsNotNull(result); Assert.IsTrue(result.Contains("Jack Ma is an asshole")); Assert.IsTrue(result.Contains("Use HW and be a patriot")); }