public void NotCrashWhenTargetIsNullWhenAddingSourceAndTargetAtTheSameTime()
{
var collectionObserver = new TestCollectionObserver
{
Source = new ObservableCollection <int>(),
Target = null
};
Assert.DoesNotThrow(() => collectionObserver.Add(13, 42));
}
public void SetTheSameSourceAsBeforeWithoutDetachingIt()
{
var testCollection = new TestCollection();
var collectionObserver = new TestCollectionObserver
{
Source = testCollection
};
testCollection.AddCalled = false;
Assert.IsFalse(testCollection.AddCalled);
collectionObserver.Source = testCollection;
Assert.IsFalse(testCollection.AddCalled);
}
public void AllowAddingToSourceAndTargetAtTheSameTime()
{
var sourceCollection = new ObservableCollection <int>();
var targetCollection = new ObservableCollection <int>();
var collectionObserver = new TestCollectionObserver
{
Source = sourceCollection,
Target = targetCollection
};
collectionObserver.Add(13, 42);
Assert.AreEqual(1, sourceCollection.Count);
Assert.AreEqual(1, targetCollection.Count);
Assert.AreEqual(13, sourceCollection[0]);
Assert.AreEqual(42, targetCollection[0]);
}