public void AndOperator_CombinesRules_CanBeWithoutAnyViolation()
{
BusinessRule rule1 = new RuleThatNeverHasAViolation();
BusinessRule rule2 = new RuleThatNeverHasAViolation();
BusinessRule result = rule1 & rule2;
IEnumerable <BusinessRuleViolation> violations = result.CheckRule();
Assert.AreEqual(0, violations.Count());
}
public void AndOperator_CombinesRules_ViolationAreNotDistinct()
{
BusinessRule rule1 = new RuleThatAlwaysHasOneViolation();
BusinessRule rule2 = new RuleThatAlwaysHasOneViolation();
BusinessRule result = rule1 & rule2;
IEnumerable <BusinessRuleViolation> violations = result.CheckRule();
Assert.AreEqual(2, violations.Count());
Assert.IsTrue(violations.All(v => v.ViolationMessage == "Always one violation"));
}
public void AndOperator_CombinesRules_AndResultsInViolationListThatIncludeBoth()
{
BusinessRule rule1 = new RuleThatAlwaysHasOneViolation();
BusinessRule rule2 = new RuleThatAlwaysHasTwoViolations();
BusinessRule result = rule1 & rule2;
IEnumerable <BusinessRuleViolation> violations = result.CheckRule();
Assert.AreEqual(3, violations.Count());
Assert.IsTrue(violations.Any(v => v.ViolationMessage == "Always one violation"));
Assert.IsTrue(violations.Any(v => v.ViolationMessage == "First violation"));
Assert.IsTrue(violations.Any(v => v.ViolationMessage == "Second violation"));
}
