public void When_DataContext_Changed_Multiple()
{
var SUT = new DependencyObjectCollection();
SUT.DataContext = 41;
var o1 = new MyDependencyObject();
o1.SetBinding(MyDependencyObject.MyPropertyProperty, new Binding());
var o2 = new MyDependencyObject();
o2.SetBinding(MyDependencyObject.MyPropertyProperty, new Binding());
Assert.AreEqual(0, o1.MyProperty);
Assert.AreEqual(0, o1.MyProperty);
SUT.Add(o1);
SUT.Add(o2);
Assert.AreEqual(41, o1.MyProperty);
Assert.AreEqual(41, o2.MyProperty);
SUT.DataContext = 42;
Assert.AreEqual(42, o1.MyProperty);
Assert.AreEqual(42, o2.MyProperty);
SUT.Clear();
Assert.AreEqual(0, o1.MyProperty);
Assert.AreEqual(0, o2.MyProperty);
}
public void When_Changed_By_Indexer()
{
var SUT = new DependencyObjectCollection();
SUT.DataContext = 42;
var o1 = new MyDependencyObject();
o1.SetBinding(MyDependencyObject.MyPropertyProperty, new Binding());
var o2 = new MyDependencyObject();
o2.SetBinding(MyDependencyObject.MyPropertyProperty, new Binding());
Assert.AreEqual(0, o1.MyProperty);
Assert.AreEqual(0, o1.MyProperty);
SUT.Add(o1);
Assert.AreEqual(42, o1.MyProperty);
Assert.AreEqual(0, o2.MyProperty);
SUT[0] = o2;
Assert.AreEqual(0, o1.MyProperty);
Assert.AreEqual(42, o2.MyProperty);
}
public void When_Add_After_DataContext()
{
var SUT = new DependencyObjectCollection();
SUT.DataContext = 42;
var o1 = new MyDependencyObject();
o1.SetBinding(MyDependencyObject.MyPropertyProperty, new Binding());
Assert.AreEqual(0, o1.MyProperty);
SUT.Add(o1);
Assert.AreEqual(42, o1.MyProperty);
}