public void Should_Remove_Old_Child_From_LogicalChildren_On_ContentChanged_OutsideTemplate()
{
var target = new ContentPresenter
{
ContentTemplate =
new FuncDataTemplate<string>(t => new ContentControl() { Content = t }, false)
};
target.Content = "foo";
target.UpdateChild();
var foo = target.Child as ContentControl;
Assert.NotNull(foo);
var logicalChildren = target.GetLogicalChildren();
Assert.Equal(1, logicalChildren.Count());
target.Content = "bar";
target.UpdateChild();
Assert.Equal(null, foo.Parent);
logicalChildren = target.GetLogicalChildren();
Assert.Equal(1, logicalChildren.Count());
Assert.NotEqual(foo, logicalChildren.First());
}
public void Should_Add_Child_To_Own_LogicalChildren_Outside_Template()
{
var content = new Border();
var target = new ContentPresenter { Content = content };
target.UpdateChild();
var logicalChildren = target.GetLogicalChildren();
Assert.Equal(1, logicalChildren.Count());
Assert.Equal(content, logicalChildren.First());
}