public void Added_Child_Should_Have_VisualParent_Set() { var target = new TestVisual(); var child = new Visual(); target.AddChild(child); Assert.Equal(target, child.GetVisualParent()); }
public void Removed_Child_Should_Have_VisualParent_Cleared() { var target = new TestVisual(); var child = new Visual(); target.AddChild(child); target.RemoveChild(child); Assert.Null(child.GetVisualParent()); }
public void Adding_Already_Parented_Control_Should_Throw() { var root1 = new TestRoot(); var root2 = new TestRoot(); var child = new TestVisual(); root1.AddChild(child); Assert.Throws <InvalidOperationException>(() => root2.AddChild(child)); Assert.Equal(0, root2.GetVisualChildren().Count()); }
public void Clearing_Children_Should_Clear_VisualParent() { var children = new[] { new Visual(), new Visual() }; var target = new TestVisual(); target.AddChildren(children); target.ClearChildren(); var result = children.Select(x => x.GetVisualParent()).ToList(); Assert.Equal(new Visual[] { null, null }, result); }
public void Added_Child_Should_Notify_VisualParent_Changed() { var target = new TestVisual(); var child = new TestVisual(); var parents = new List <IVisual>(); child.GetObservable(Visual.VisualParentProperty).Subscribe(x => parents.Add(x)); target.AddChild(child); target.RemoveChild(child); Assert.Equal(new IVisual[] { null, target, null }, parents); }
public void Removing_Children_Should_Fire_OnDetachedFromVisualTree() { var child2 = new TestVisual(); var child1 = new TestVisual { Child = child2 }; var root = new TestRoot(); var called1 = false; var called2 = false; root.Child = child1; child1.DetachedFromVisualTree += (s, e) => called1 = true; child2.DetachedFromVisualTree += (s, e) => called2 = true; root.Child = null; Assert.True(called1); Assert.True(called2); }
public void Adding_Children_Should_Fire_OnAttachedToVisualTree() { var child2 = new TestVisual(); var child1 = new TestVisual { Child = child2 }; var root = new TestRoot(); var called1 = false; var called2 = false; child1.AttachedToVisualTree += (s, e) => called1 = true; child2.AttachedToVisualTree += (s, e) => called2 = true; root.Child = child1; Assert.True(called1); Assert.True(called2); }