public void DynamicList()
{
var conditions = new ObservableCollection <ICondition>();
using (var condition = new OrCondition(conditions, leaveOpen: true))
{
var actuals = new List <bool?>();
using (condition.ObserveIsSatisfiedChanged()
.Subscribe(c => actuals.Add(c.IsSatisfied)))
{
var preRequisiteChanges = 0;
using (condition.ObservePropertyChangedSlim(x => x.Prerequisites, signalInitial: false)
.Subscribe(x => preRequisiteChanges++))
{
Assert.AreEqual(0, preRequisiteChanges);
CollectionAssert.IsEmpty(condition.Prerequisites);
Assert.AreSame(condition.Prerequisites, condition.Prerequisites);
Assert.AreEqual(null, condition.IsSatisfied);
CollectionAssert.IsEmpty(actuals);
Assert.AreEqual(null, condition.IsSatisfied);
conditions.Add(Mock.Of <ICondition>(x => x.IsSatisfied == true));
Assert.AreEqual(true, condition.IsSatisfied);
CollectionAssert.AreEqual(new[] { true }, actuals);
Assert.AreEqual(1, preRequisiteChanges);
CollectionAssert.AreEqual(conditions, condition.Prerequisites);
Assert.AreSame(condition.Prerequisites, condition.Prerequisites);
Mock.Get(conditions[0]).SetupGet(x => x.IsSatisfied).Returns(false);
Mock.Get(conditions[0]).Raise(x => x.PropertyChanged += null, new PropertyChangedEventArgs("IsSatisfied"));
Assert.AreEqual(false, condition.IsSatisfied);
CollectionAssert.AreEqual(new[] { true, false }, actuals);
Assert.AreEqual(1, preRequisiteChanges);
CollectionAssert.AreEqual(conditions, condition.Prerequisites);
Assert.AreSame(condition.Prerequisites, condition.Prerequisites);
}
}
}
}