public void test_trigger()
{
var instance = new TestCollection();
var countA = 0;
var countB = 0;
instance.AddEventHandler <TestEventA>((gp) => { countA += 1; });
instance.AddEventHandler <TestEventB>((gp) => { countB += 1; });
instance.Trigger(new TestEventA());
instance.Trigger(new TestEventA());
instance.Trigger(new TestEventB());
instance.Trigger(new TestEventB());
instance.Trigger(new TestEventA());
Assert(countA == 3);
Assert(countB == 2);
}