public void ActivatingWindowThrowsException()
            {
                _uiTestHelper.ExecuteOnUIThread(() =>
                {
                    // Prepare
                    var view = new ViewHostControl {
                        View = new Window()
                    };
                    var viewGroup = new ViewGroup();
                    viewGroup.Push(new View("view1")
                    {
                        ViewHostInstance = view
                    });

                    // Act
                    _workspaceAdapter.PerformUIActivation(null, viewGroup.Peek()).Wait();

                    // Verify
                });
            }
            public void CanActivateViewMoreThanOnce()
            {
                _uiTestHelper.ExecuteOnUIThread(() =>
                {
                    // Prepare
                    var view = new ViewHostControl {
                        View = new UserControl()
                    };
                    var viewGroup = new ViewGroup();
                    viewGroup.Push(new View("view1")
                    {
                        ViewHostInstance = view
                    });
                    _workspaceAdapter.PerformUIActivation(null, viewGroup.Peek()).Wait();

                    // Act
                    _workspaceAdapter.PerformUIActivation(null, viewGroup.Peek()).Wait();

                    // Verify
                    Assert.IsTrue(((ViewGroupHostControl)_workspace.Children[0]).Views.Count == 1);
                });
            }
            public void ClosedViewGroupIsRemovedIfEmpty()
            {
                _uiTestHelper.ExecuteOnUIThread(() =>
                {
                    // Prepare
                    var view1 = new ViewHostControl {
                        View = new UserControl()
                    };
                    var viewGroup = new ViewGroup();
                    var view1Node = viewGroup.Push(new View("view1")
                    {
                        ViewHostInstance = view1
                    });
                    _workspaceAdapter.PerformUIActivation(null, view1Node).Wait();

                    // Act
                    _workspaceAdapter.PerformUIClose(new ViewGroupNode(viewGroup, view1Node.Value), null)
                    .Wait();

                    // Verify
                    Assert.IsTrue(_workspace.Children.Count == 0);
                });
            }