public void IsNotNullRuleIsValid() { int i = 0; IsNotNullRule rule = new IsNotNullRule("IsNotNull", "The target is null. Cannot be null.", i); Result result = rule.Execute(); Assert.IsTrue(result.IsValid); Assert.IsNotNullOrEmpty(result.Message); Assert.IsNotNull(result.RulePolicy); Assert.AreEqual(result.RulePolicy.Severity, Severity.Exception); }