public void ThresholdComparerTest()
{
ThresholdComparer zeroThreashold = new ThresholdComparer { Threhold = 0 };
ThresholdComparer tenThreshold = new ThresholdComparer { Threhold = 10 };
ThresholdComparer hundredThreshold = new ThresholdComparer { Threhold = 100 };
Predicate<int> graterThanZero = zeroThreashold.IsGraterThan;
Predicate<int> tenThanZero = tenThreshold.IsGraterThan;
Predicate<int> handredThanZero = hundredThreshold.IsGraterThan;
// Create Delegate
Predicate<int> createDelegate = (Predicate<int>)Delegate.CreateDelegate(typeof(Predicate<int>), zeroThreashold, "IsGraterThan");
Assert.IsTrue(graterThanZero(1));
Assert.IsTrue(tenThanZero(11));
Assert.IsFalse(graterThanZero(-1));
}
public void CombineDelete()
{
ThresholdComparer zeroThreashold = new ThresholdComparer { Threhold = 0 };
ThresholdComparer tenThreshold = new ThresholdComparer { Threhold = 10 };
ThresholdComparer hundredThreshold = new ThresholdComparer { Threhold = 100 };
Predicate<int> graterThanZero = zeroThreashold.IsGraterThan;
Predicate<int> tenThanZero = tenThreshold.IsGraterThan;
Predicate<int> handredThanZero = hundredThreshold.IsGraterThan;
Predicate<int> combinePredicate =
graterThanZero + tenThanZero + handredThanZero;
Assert.IsFalse(combinePredicate(5));
Assert.IsTrue(combinePredicate(101));
Assert.IsFalse(combinePredicate(99));
foreach (Predicate<int> d in combinePredicate.GetInvocationList())
{
Assert.IsTrue(d(101));
}
}