public void When_ContentPresenter_Recylced()
{
_mockProvider.CanUseMemoryManager = false;
var SUT = new ContentControl();
SUT.Content = "asd";
var root = new Grid();
root.ForceLoaded();
root.Children.Add(SUT);
var templateCreatedCount = 0;
var flagValues = new List <bool>();
var template = new ControlTemplate(() =>
{
var presenter = new ContentPresenter();
presenter.Loaded += (s, e) =>
{
var field = presenter.GetType().GetField("_firstLoadResetDone", BindingFlags.NonPublic | BindingFlags.Instance)
?? throw new MissingFieldException("_firstLoadResetDone no longer exist on ContentPresenter.");
flagValues.Add((bool)field.GetValue(presenter));
};
templateCreatedCount++;
return(presenter);
});
// first load
SUT.Template = template;
Assert.AreEqual(1, templateCreatedCount);
Assert.AreEqual(1, flagValues.Count);
// recycle & reload
SUT.Template = null;
SUT.Template = template;
Assert.AreEqual(1, templateCreatedCount);
Assert.AreEqual(2, flagValues.Count);
Assert.AreEqual(flagValues[1], false);
}