public void Changing_Content_Should_Fire_LogicalChildren_CollectionChanged()
{
var contentControl = new ContentControl();
var child1 = new Control();
var child2 = new Control();
var called = false;
contentControl.Template = this.GetTemplate();
contentControl.Content = child1;
contentControl.ApplyTemplate();
((ILogical)contentControl).LogicalChildren.CollectionChanged += (s, e) => called = true;
contentControl.Content = child2;
// Need to call ApplyTemplate on presenter for CollectionChanged to be called.
var presenter = contentControl.GetTemplateChildren().Single(x => x.Name == "contentPresenter");
presenter.ApplyTemplate();
Assert.True(called);
}
public void Clearing_Content_Should_Remove_From_LogicalChildren()
{
var target = new ContentControl();
var child = new Control();
target.Template = this.GetTemplate();
target.Content = child;
target.ApplyTemplate();
target.Content = null;
// Need to call ApplyTemplate on presenter for LogocalChildren to be updated.
var presenter = target.GetTemplateChildren().Single(x => x.Name == "contentPresenter");
presenter.ApplyTemplate();
Assert.Equal(new ILogical[0], ((ILogical)target).LogicalChildren.ToList());
}
public void Clearing_Content_Should_Fire_LogicalChildren_CollectionChanged()
{
var target = new ContentControl();
var child = new Control();
var called = false;
target.Template = this.GetTemplate();
target.Content = child;
target.ApplyTemplate();
((ILogical)target).LogicalChildren.CollectionChanged += (s, e) => called = true;
target.Content = null;
// Need to call ApplyTemplate on presenter for CollectionChanged to be called.
var presenter = target.GetTemplateChildren().Single(x => x.Name == "contentPresenter");
presenter.ApplyTemplate();
Assert.True(called);
}