public void SetUnsetClear_Tag ()
{
var obj = new object ();
ConcreteFrameworkElement fe = new ConcreteFrameworkElement () {
Tag = obj
};
fe.SetValue(FrameworkElement.TagProperty, DependencyProperty.UnsetValue);
Assert.IsNull (fe.Tag, "Tag is not null (the default value)");
fe.Tag = 3;
Assert.AreEqual (3, fe.Tag, "Tag can change though");
fe.SetValue(FrameworkElement.TagProperty, DependencyProperty.UnsetValue);
Assert.IsNull (fe.Tag, "Tag is null");
}
public void InvalidValues()
{
ConcreteFrameworkElement f = new ConcreteFrameworkElement ();
Assert.Throws<Exception>(delegate {
f.Language = null;
}, "#1"); // Fails in Silverlight 3 (got System.Exception)
Assert.Throws<Exception>(delegate {
f.SetValue (FrameworkElement.LanguageProperty, null);
}, "#2");
}
public void SetUnset ()
{
var obj = new object ();
ConcreteFrameworkElement fe = new ConcreteFrameworkElement () {
Width = 30,
Foo = obj,
DefaultFoo = obj
};
fe.SetValue(FrameworkElement.WidthProperty, DependencyProperty.UnsetValue);
fe.SetValue(ConcreteFrameworkElement.FooProperty, DependencyProperty.UnsetValue);
fe.SetValue(ConcreteFrameworkElement.DefaultFooProperty, DependencyProperty.UnsetValue);
Assert.IsTrue (double.IsNaN (fe.Width), "Width is NaN (the default value)");
Assert.AreEqual (3, fe.DefaultFoo, "DefaultFoo is 3 (the default value)");
Assert.IsNull (fe.Foo, "Foo is null");
}
