public void ClearsFilterOnEachItem()
{
HierarchyTreeViewItemCollection collection;
HierarchyTreeViewItem item;
HierarchyTreeViewItem childA;
HierarchyTreeViewItem childB;
HierarchyTreeViewItem childC;
childA = Factory.CreateTreeViewItem(name: "A");
childB = Factory.CreateTreeViewItem(name: "B");
childC = Factory.CreateTreeViewItem(name: "C");
item = Factory.CreateTreeViewItem(name: "Root", children: new[] { childA, childB, childC });
collection = new HierarchyTreeViewItemCollection(new[] { item });
collection.Filter(new RegexTextFilter("B"));
Assert.Equal(new[] { item }, collection);
Assert.Equal(new[] { childB }, item.Children);
collection.ClearFilter();
Assert.Equal(new[] { item }, collection);
Assert.Equal(new[] { childA, childB, childC }, item.Children);
}
public void DoesNotRaiseCollectionChangedEventWhenCollectionIsEmpty()
{
HierarchyTreeViewItemCollection collection;
bool raised;
raised = false;
collection = new HierarchyTreeViewItemCollection(Enumerable.Empty <HierarchyTreeViewItem>());
collection.Filter(new RegexTextFilter("A"));
collection.CollectionChanged += (s, e) => raised = true;
collection.ClearFilter();
Assert.False(raised);
}
public void ReturnsCountOfFilteredItems()
{
HierarchyTreeViewItemCollection collection;
collection = new HierarchyTreeViewItemCollection(new[] {
Factory.CreateTreeViewItem(name: "foo"),
Factory.CreateTreeViewItem(name: "bar")
});
Assert.Equal(2, collection.Count);
collection.Filter(new RegexTextFilter("f"));
Assert.Single(collection);
collection.ClearFilter();
Assert.Equal(2, collection.Count);
}
public void RestoresOriginalItems()
{
HierarchyTreeViewItemCollection collection;
HierarchyTreeViewItem foo;
HierarchyTreeViewItem bar;
HierarchyTreeViewItem meep;
foo = Factory.CreateTreeViewItem(name: "foo");
bar = Factory.CreateTreeViewItem(name: "bar");
meep = Factory.CreateTreeViewItem(name: "meep");
collection = new HierarchyTreeViewItemCollection(new[] { foo, bar, meep });
collection.Filter(new RegexTextFilter("foo"));
Assert.Equal(new[] { foo }, collection);
collection.ClearFilter();
Assert.Equal(new[] { foo, bar, meep }, collection);
}
public void RaisesCollectionChangedEventWhenCollectionIsNotEmpty()
{
HierarchyTreeViewItemCollection collection;
Assert.RaisedEvent <NotifyCollectionChangedEventArgs> e;
collection = new HierarchyTreeViewItemCollection(new[] {
Factory.CreateTreeViewItem(name: "Foo"),
Factory.CreateTreeViewItem(name: "Bar"),
});
collection.Filter(new RegexTextFilter("F"));
e = Assert.Raises <NotifyCollectionChangedEventArgs>(
(x) => collection.CollectionChanged += new NotifyCollectionChangedEventHandler(x),
(x) => collection.CollectionChanged -= new NotifyCollectionChangedEventHandler(x),
() => collection.ClearFilter()
);
Assert.Equal(NotifyCollectionChangedAction.Reset, e.Arguments.Action);
}
