public void ThreeLevels()
{
var args = new List <EventPattern <PropertyChangedEventArgs> >();
var fake = new FakeInpc();
var observable = new NestedObservable <FakeInpc, bool>(fake, x => x.Next.Next.Value);
observable.Subscribe(args.Add);
fake.Next = new Level();
Assert.AreEqual(0, args.Count);
fake.Next.Next = new Level
{
Next = new Level()
};
Assert.AreEqual(1, args.Count);
fake.Next.Next = null;
Assert.AreEqual(2, args.Count);
fake.Next = null;
Assert.AreEqual(2, args.Count);
fake.Next = new Level
{
Next = new Level
{
Value = true
}
};
Assert.AreEqual(3, args.Count);
fake.Next.Next.Value = false;
Assert.AreEqual(4, args.Count);
fake.Next.Next = null;
Assert.AreEqual(5, args.Count);
fake.Next = null;
Assert.AreEqual(5, args.Count);
}
public void TwoLevelsValueType()
{
var args = new List <EventPattern <PropertyChangedEventArgs> >();
var fake = new FakeInpc();
var observable = new NestedObservable <FakeInpc, bool>(fake, x => x.Next.Value);
observable.Subscribe(args.Add);
fake.Next = new Level();
Assert.AreEqual(1, args.Count);
fake.Next.Value = !fake.Next.Value;
Assert.AreEqual(2, args.Count);
fake.Next = null;
Assert.AreEqual(3, args.Count);
}
public void TwoLevelsExisting()
{
var args = new List <EventPattern <PropertyChangedEventArgs> >();
var fake = new FakeInpc {
Next = new Level {
Next = new Level()
}
};
var observable = new NestedObservable <FakeInpc, Level>(fake, x => x.Next.Next);
observable.Subscribe(args.Add);
fake.Next.Next = new Level();
Assert.AreEqual(1, args.Count);
fake.Next.Next = null;
Assert.AreEqual(2, args.Count);
fake.Next = null;
Assert.AreEqual(2, args.Count);
}