public void AddTest()
{
const int expectedChangeCount = 5;
int actualChangeCount = 0;
var compositeCollection = new CompositeCollection();
compositeCollection.CollectionChanged += (sender, e) => actualChangeCount++;
PopulateCollection(compositeCollection, expectedChangeCount);
Assert.AreEqual(expectedChangeCount, compositeCollection.Collections.Count, "Collections do not appear to have been added");
Assert.AreEqual(expectedChangeCount, actualChangeCount, "CollectionChanged event count is incorrect");
}
public void RemoveTest()
{
const int expectedChangeCount = 5;
int actualChangeCount = 0;
var compositeCollection = new CompositeCollection();
PopulateCollection(compositeCollection);
compositeCollection.CollectionChanged += (sender, e) => actualChangeCount++;
while (compositeCollection.Collections.Count > 0)
{
compositeCollection.Remove(compositeCollection.Collections[0]);
}
Assert.AreEqual(expectedChangeCount, actualChangeCount, "Failed to be notified for all collections removed");
}
public void ClearTest()
{
var compositeCollection = new CompositeCollection();
PopulateCollection(compositeCollection);
var lists = new List<ObservableCollection<string>>();
foreach (ObservableCollection<string> list in compositeCollection.Collections)
lists.Add(list);
compositeCollection.Clear();
Assert.AreEqual(0, compositeCollection.Collections.Count, "Failed to clear internal collections (1)");
int changeCount = 0;
compositeCollection.CollectionChanged += (s, e) => changeCount++;
foreach (ObservableCollection<string> list in lists)
{
list.Add("Test");
}
Assert.AreEqual(0, changeCount, "Collection is still hooked to the change notifications of it's previous lists");
}
public void RemoveTest2()
{
var compositeCollection = new CompositeCollection();
PopulateCollection(compositeCollection);
var lists = new List<ObservableCollection<string>>();
foreach (ObservableCollection<string> list in compositeCollection.Collections)
lists.Add(list);
//Hook for a change count after clearing the list
while (compositeCollection.Collections.Count > 0)
{
compositeCollection.Collections.RemoveAt(0);
}
int changeCount = 0;
compositeCollection.CollectionChanged += (s, e) => changeCount++;
//Now add to the collections and ensure that the list isn't still hooked to collection changed
foreach (ObservableCollection<string> list in lists)
list.Add("Test");
Assert.AreEqual(0, changeCount, "Collection is still hooked to the change notifications of it's previous lists");
}
private void PopulateCollection(CompositeCollection compositeCollection, int count = 5)
{
for (int i = 0; i < count; i++)
{
var collection = new ObservableCollection<string> { "Test 1", "Test 2", "Test 3" };
compositeCollection.Add(collection);
}
}
