public void AttachPropertyChangedHandler_Should_Be_Called_On_Chain()
{
var source = new Mock<IObservableDependencyObject>();
var foo = new Mock<IObservableDependencyObject>();
var bar = new Mock<IObservableDependencyObject>();
Mock<IPropertyPathParser> mockPathParser = new Mock<IPropertyPathParser>();
mockPathParser.Setup(x => x.Parse(source.Object, "Foo.Bar")).Returns(new[]
{
new PropertyPathToken(source.Object, "Foo"),
new PropertyPathToken(foo.Object, "Bar"),
new PropertyPathToken(bar.Object, null),
});
Mock<DependencyObject> mockTarget = new Mock<DependencyObject>();
Binding binding = new Binding
{
Path = new PropertyPath("Foo.Bar"),
Source = source.Object,
};
BindingExpression target = new BindingExpression(
mockPathParser.Object,
mockTarget.Object,
Control.BackgroundProperty,
binding);
target.GetValue();
source.Verify(x => x.AttachPropertyChangedHandler("Foo", It.IsAny<DependencyPropertyChangedEventHandler>()));
foo.Verify(x => x.AttachPropertyChangedHandler("Bar", It.IsAny<DependencyPropertyChangedEventHandler>()));
bar.Verify(x => x.AttachPropertyChangedHandler("Bar", It.IsAny<DependencyPropertyChangedEventHandler>()), Times.Never());
}
public BindingExpression SetBinding(DependencyProperty dp, Binding binding)
{
PropertyPathParser pathParser = new PropertyPathParser();
BindingExpression expression = new BindingExpression(pathParser, this, dp, binding);
object oldValue = this.GetValue(dp);
object newValue = expression.GetValue();
this.propertyBindings.Add(dp, expression);
this.SetValueInternal(dp, oldValue, newValue);
return expression;
}
