C# Regions.Region类代码示例

        public void WhenViewExistsAndDoesNotImplementINavigationAware_ThenReturnsView()
        {
            // Arrange

            var serviceLocatorMock = new Mock<IServiceLocator>();

            var region = new Region();

            var view = new TestView();

            region.Add(view);

            var navigationContext = new NavigationContext(null, new Uri(view.GetType().Name, UriKind.Relative));

            var navigationTargetHandler = new TestRegionNavigationContentLoader(serviceLocatorMock.Object);


            // Act

            var returnedView = navigationTargetHandler.LoadContent(region, navigationContext);


            // Assert

            Assert.AreSame(view, returnedView);
        }

        public void WhenRegionConstructed_SortComparisonIsDefault()
        {
            IRegion region = new Region();

            Assert.IsNotNull(region.SortComparison);
            Assert.AreEqual(region.SortComparison, Region.DefaultSortComparison);
        }

        public void WhenNavigatingAndBothViewAndDataContextImplementINavigationAware_ThenNavigatedIsInvokesOnNavigation()
        {
            // Prepare
            var region = new Region();

            Mock<FrameworkElement> mockFrameworkElement = new Mock<FrameworkElement>();
            Mock<INavigationAware> mockINavigationAwareView = mockFrameworkElement.As<INavigationAware>();
            mockINavigationAwareView.Setup(ina => ina.IsNavigationTarget(It.IsAny<NavigationContext>())).Returns(true);

            Mock<INavigationAware> mockINavigationAwareDataContext = new Mock<INavigationAware>();
            mockINavigationAwareDataContext.Setup(ina => ina.IsNavigationTarget(It.IsAny<NavigationContext>())).Returns(true);
            mockFrameworkElement.Object.DataContext = mockINavigationAwareDataContext.Object;

            var view = mockFrameworkElement.Object;
            region.Add(view);

            var navigationUri = new Uri(view.GetType().Name, UriKind.Relative);

            var serviceLocatorMock = new Mock<IServiceLocator>();
            serviceLocatorMock.Setup(x => x.GetInstance<IRegionNavigationJournalEntry>()).Returns(new RegionNavigationJournalEntry());

            IServiceLocator serviceLocator = serviceLocatorMock.Object;
            RegionNavigationContentLoader contentLoader = new RegionNavigationContentLoader(serviceLocator);
            IRegionNavigationJournal journal = new Mock<IRegionNavigationJournal>().Object;

            RegionNavigationService target = new RegionNavigationService(serviceLocator, contentLoader, journal);
            target.Region = region;

            // Act
            target.RequestNavigate(navigationUri, nr => { });

            // Verify
            mockINavigationAwareView.Verify(v => v.OnNavigatedTo(It.Is<NavigationContext>(nc => nc.Uri == navigationUri)));
            mockINavigationAwareDataContext.Verify(v => v.OnNavigatedTo(It.Is<NavigationContext>(nc => nc.Uri == navigationUri)));
        }

        public void WhenNavigatingWithQueryString_ViewIsActivated()
        {
            // Prepare
            object view = new object();
            Uri viewUri = new Uri(view.GetType().Name + "?MyQuery=true", UriKind.Relative);

            IRegion region = new Region();
            region.Add(view);

            string regionName = "RegionName";
            RegionManager regionManager = new RegionManager();
            regionManager.Regions.Add(regionName, region);

            var serviceLocatorMock = new Mock<IServiceLocator>();
            serviceLocatorMock.Setup(x => x.GetInstance<IRegionNavigationJournalEntry>()).Returns(new RegionNavigationJournalEntry());

            IServiceLocator serviceLocator = serviceLocatorMock.Object;
            RegionNavigationContentLoader contentLoader = new RegionNavigationContentLoader(serviceLocator);
            IRegionNavigationJournal journal = new Mock<IRegionNavigationJournal>().Object;

            RegionNavigationService target = new RegionNavigationService(serviceLocator, contentLoader, journal);
            target.Region = region;

            // Act
            bool isNavigationSuccessful = false;
            target.RequestNavigate(viewUri, nr => isNavigationSuccessful = nr.Result == true);

            // Verify
            Assert.IsTrue(isNavigationSuccessful);
            bool isViewActive = region.ActiveViews.Contains(view);
            Assert.IsTrue(isViewActive);
        }

        public void WhenRegionHasMultipleViews_ThenViewsWithMatchingFullTypeNameAreConsidered()
        {
            // Arrange

            var serviceLocatorMock = new Mock<IServiceLocator>();

            var region = new Region();

            var view1 = new TestView();
            var view2 = "view";

            region.Add(view1);
            region.Add(view2);

            var navigationContext = new NavigationContext(null, new Uri(view2.GetType().FullName, UriKind.Relative));

            var navigationTargetHandler = new TestRegionNavigationContentLoader(serviceLocatorMock.Object);

            // Act

            var returnedView = navigationTargetHandler.LoadContent(region, navigationContext);

            // Assert

            Assert.AreSame(view2, returnedView);
        }

        public void WhenNoCurrentMatchingViewExists_ThenReturnsNewlyCreatedInstanceWithServiceLocatorAddedToTheRegion()
        {
            // Arrange

            var serviceLocatorMock = new Mock<IServiceLocator>();

            var region = new Region();

            var view = new TestView();

            serviceLocatorMock
                .Setup(sl => sl.GetInstance<object>(view.GetType().Name))
                .Returns(view);

            var navigationContext = new NavigationContext(null, new Uri(view.GetType().Name, UriKind.Relative));

            var navigationTargetHandler = new TestRegionNavigationContentLoader(serviceLocatorMock.Object);

            // Act

            var returnedView = navigationTargetHandler.LoadContent(region, navigationContext);

            // Assert

            Assert.AreSame(view, returnedView);
            Assert.IsTrue(region.Views.Contains(view));
        }

        public void AddingDuplicateNamedViewThrows()
        {
            IRegion region = new Region();

            region.Add(new object(), "MyView");
            region.Add(new object(), "MyView");
        }

        public void ActivateNonAddedViewThrows()
        {
            IRegion region = new Region();

            object nonAddedView = new object();

            region.Activate(nonAddedView);
        }

        public void RemoveInexistentViewThrows()
        {
            IRegion region = new Region();
            object view = new object();

            region.Remove(view);

            Assert.AreEqual(0, region.Views.Cast<object>().Count());
        }

        public void AddingNonDependencyObjectToRegionDoesNotThrow()
        {
            IRegion region = new Region();
            object model = new object();

            region.Add(model);

            Assert.AreEqual(1, region.Views.Cast<object>().Count());
        }

        public void AddNamedViewIsAlsoListedInViewsCollection()
        {
            IRegion region = new Region();
            object myView = new object();

            region.Add(myView, "MyView");

            Assert.AreEqual(1, region.Views.Cast<object>().Count());
            Assert.AreSame(myView, region.Views.Cast<object>().ElementAt(0));
        }

        public void CanAddAndRetrieveNamedViewInstance()
        {
            IRegion region = new Region();
            object myView = new object();
            region.Add(myView, "MyView");
            object returnedView = region.GetView("MyView");

            Assert.IsNotNull(returnedView);
            Assert.AreSame(returnedView, myView);
        }

        public void CanRemoveContentFromRegion()
        {
            IRegion region = new Region();
            object view = new object();

            region.Add(view);
            region.Remove(view);

            Assert.AreEqual(0, region.Views.Cast<object>().Count());
        }

        public void CanAddContentToRegion()
        {
            IRegion region = new Region();

            Assert.AreEqual(0, region.Views.Cast<object>().Count());

            region.Add(new object());

            Assert.AreEqual(1, region.Views.Cast<object>().Count());
        }

        public void RegionExposesCollectionOfContainedViews()
        {
            IRegion region = new Region();

            object view = new object();

            region.Add(view);

            var views = region.Views;

            Assert.IsNotNull(views);
            Assert.AreEqual(1, views.Cast<object>().Count());
            Assert.AreSame(view, views.Cast<object>().ElementAt(0));
        }