public void ReactsAndNotifiesOnSourceChanges()
{
var ints = new ObservableCollection <int> {
1, 2, 3
};
using (var tracker = MinTracker.TrackMin(ints))
{
Assert.AreEqual(1, tracker.Value);
int count = 0;
using (tracker.ObservePropertyChangedSlim(x => x.Value, signalInitial: false)
.Subscribe(_ => count++))
{
ints.Remove(2);
Assert.AreEqual(0, count);
Assert.AreEqual(1, tracker.Value);
ints.Remove(1);
Assert.AreEqual(1, count);
Assert.AreEqual(3, tracker.Value);
ints.Remove(3);
Assert.AreEqual(2, count);
Assert.AreEqual(null, tracker.Value);
ints.Add(2);
Assert.AreEqual(3, count);
Assert.AreEqual(2, tracker.Value);
}
}
}
public void ReactsAndNotifiesOnSourceChanges()
{
var ints = new ObservableCollection <int>(new[] { 1, 2, 3 });
var tracker = MinTracker.TrackMin(ints, -1);
Assert.AreEqual(1, tracker.Value);
int count = 0;
tracker.ObservePropertyChanged(x => x.Value, false)
.Subscribe(_ => count++);
ints.Remove(2);
Assert.AreEqual(0, count);
Assert.AreEqual(1, tracker.Value);
ints.Remove(1);
Assert.AreEqual(1, count);
Assert.AreEqual(3, tracker.Value);
ints.Remove(3);
Assert.AreEqual(2, count);
Assert.AreEqual(-1, tracker.Value);
ints.Add(2);
Assert.AreEqual(3, count);
Assert.AreEqual(2, tracker.Value);
}
