public static void StopsSubscribing()
{
var changes = new List <EventPattern <ItemPropertyChangedEventArgs <Fake, string?> > >();
var collection1 = new ObservableCollection <Fake> {
new Fake {
Name = "1"
}
};
var fake = new FakeWithCollection {
Collection = collection1
};
using (fake.ObserveValue(x => x.Collection, signalInitial: true)
.ItemPropertyChanged(x => x.Name)
.Subscribe(changes.Add))
{
EventPatternAssert.AreEqual(collection1[0], collection1, collection1[0], Maybe.Some <string?>("1"), string.Empty, changes.Single());
fake.Collection = null;
Assert.AreEqual(2, changes.Count);
EventPatternAssert.AreEqual(null, collection1, collection1[0], Maybe.Some <string?>("1"), string.Empty, changes.Last());
collection1[0].Name = "new";
Assert.AreEqual(2, changes.Count);
var collection2 = new ObservableCollection <Fake> {
new Fake {
Name = "1"
}
};
fake.Collection = collection2;
Assert.AreEqual(3, changes.Count);
EventPatternAssert.AreEqual(collection2[0], collection2, collection2[0], Maybe.Some <string?>("1"), string.Empty, changes.Last());
}
}
public static void ReplacingCollectionWithNewWithSameItems()
{
var changes = new List <EventPattern <ItemPropertyChangedEventArgs <Fake, string?> > >();
var collection = new ObservableCollection <Fake>
{
new Fake {
Next = new Level {
Name = "1"
}
},
new Fake {
Next = new Level {
Name = "2"
}
},
};
var fake = new FakeWithCollection {
Collection = collection
};
using (fake.ObserveValue(x => x.Collection, signalInitial: true)
.ItemPropertyChanged(x => x.Next.Name)
.Subscribe(changes.Add))
{
Assert.AreEqual(2, changes.Count);
EventPatternAssert.AreEqual(collection[0], collection, collection[0].Next, Maybe.Some <string?>("1"), string.Empty, changes[0]);
EventPatternAssert.AreEqual(collection[1], collection, collection[1].Next, Maybe.Some <string?>("2"), string.Empty, changes[1]);
fake.Collection = new ObservableCollection <Fake>(collection);
Assert.AreEqual(6, changes.Count);
EventPatternAssert.AreEqual(null, collection, collection[0].Next, Maybe.Some <string?>("1"), string.Empty, changes[2]);
EventPatternAssert.AreEqual(null, collection, collection[1].Next, Maybe.Some <string?>("2"), string.Empty, changes[3]);
EventPatternAssert.AreEqual(collection[0], fake.Collection, collection[0].Next, Maybe.Some <string?>("1"), string.Empty, changes[4]);
EventPatternAssert.AreEqual(collection[1], fake.Collection, collection[1].Next, Maybe.Some <string?>("2"), string.Empty, changes[5]);
collection.Add(new Fake());
Assert.AreEqual(6, changes.Count);
fake.Collection.Add(new Fake {
Next = new Level {
Name = "3"
}
});
Assert.AreEqual(7, changes.Count);
EventPatternAssert.AreEqual(fake.Collection[2], fake.Collection, fake.Collection[2].Next, Maybe.Some <string?>("3"), string.Empty, changes.Last());
}
Assert.AreEqual(7, changes.Count);
}
public static void OneObservableTwoSubscriptionsNested()
{
var changes1 = new List <EventPattern <ItemPropertyChangedEventArgs <Fake, string?> > >();
var changes2 = new List <EventPattern <ItemPropertyChangedEventArgs <Fake, string?> > >();
var collection = new ObservableCollection <Fake> {
new Fake {
Next = new Level {
Name = "1"
}
}
};
var fake = new FakeWithCollection {
Collection = collection
};
var observable = fake.ObserveValue(x => x.Collection, signalInitial: true)
.ItemPropertyChanged(x => x.Next.Name);
using (observable.Subscribe(changes1.Add))
{
using (observable.Subscribe(changes2.Add))
{
fake.Collection = collection;
EventPatternAssert.AreEqual(collection[0], collection, collection[0].Next, Maybe.Some <string?>("1"), string.Empty, changes1.Single());
EventPatternAssert.AreEqual(collection[0], collection, collection[0].Next, Maybe.Some <string?>("1"), string.Empty, changes2.Single());
fake.Collection.Add(new Fake {
Next = new Level {
Name = "2"
}
});
Assert.AreEqual(2, changes1.Count);
Assert.AreEqual(2, changes2.Count);
EventPatternAssert.AreEqual(collection[1], collection, collection[1].Next, Maybe.Some <string?>("2"), string.Empty, changes1.Last());
EventPatternAssert.AreEqual(collection[1], collection, collection[1].Next, Maybe.Some <string?>("2"), string.Empty, changes2.Last());
fake.Collection[1].Next !.Name = "3";
Assert.AreEqual(3, changes1.Count);
Assert.AreEqual(3, changes2.Count);
EventPatternAssert.AreEqual(collection[1], collection[1].Next, collection[1].Next, Maybe.Some <string?>("3"), "Name", changes1.Last());
EventPatternAssert.AreEqual(collection[1], collection[1].Next, collection[1].Next, Maybe.Some <string?>("3"), "Name", changes2.Last());
}
}
}
public static void OneObservableTwoSubscriptions()
{
var changes1 = new List <EventPattern <ItemPropertyChangedEventArgs <Fake, string?> > >();
var changes2 = new List <EventPattern <ItemPropertyChangedEventArgs <Fake, string?> > >();
var fake = new FakeWithCollection();
var observable = fake.ObserveValue(x => x.Collection)
.ItemPropertyChanged(x => x.Name);
using (observable.Subscribe(changes1.Add))
{
using (observable.Subscribe(changes2.Add))
{
CollectionAssert.IsEmpty(changes1);
CollectionAssert.IsEmpty(changes2);
var source = new ObservableCollection <Fake> {
new Fake {
Name = "1"
}
};
fake.Collection = source;
EventPatternAssert.AreEqual(source[0], source, source[0], Maybe.Some <string?>("1"), string.Empty, changes1.Single());
EventPatternAssert.AreEqual(source[0], source, source[0], Maybe.Some <string?>("1"), string.Empty, changes2.Single());
fake.Collection.Add(new Fake {
Name = "2"
});
Assert.AreEqual(2, changes1.Count);
Assert.AreEqual(2, changes2.Count);
EventPatternAssert.AreEqual(source[1], source, source[1], Maybe.Some <string?>("2"), string.Empty, changes2.Last());
EventPatternAssert.AreEqual(source[1], source, source[1], Maybe.Some <string?>("2"), string.Empty, changes2.Last());
fake.Collection[1].Name = "3";
Assert.AreEqual(3, changes1.Count);
Assert.AreEqual(3, changes2.Count);
EventPatternAssert.AreEqual(source[1], source[1], source[1], Maybe.Some <string?>("3"), "Name", changes1.Last());
EventPatternAssert.AreEqual(source[1], source[1], source[1], Maybe.Some <string?>("3"), "Name", changes2.Last());
}
}
}
