tests: adding tests for WindowManagerExtensions

src/Maui/Prism.Maui/Navigation/IWindowManagerExtensions.cs

@@ -12,7 +12,7 @@ public static class IWindowManagerExtensions
     /// <returns>The <see cref="INavigationService"/> for the current <see cref="Page"/>.</returns>
     public static INavigationService GetCurrentNavigationService(this IWindowManager windowManager)
     {
-        var window = windowManager.Windows.OfType<PrismWindow>().First(x => x.IsActive);
+        var window = windowManager.Windows.OfType<PrismWindow>().First();
 
         if (window.CurrentPage is null)
             throw new InvalidOperationException("No current page has been set.");

tests/Maui/Prism.DryIoc.Maui.Tests/Fixtures/Navigation/WindowManagerTests.cs

@@ -0,0 +1,37 @@
+
+using Prism.Navigation.Xaml;
+
+namespace Prism.DryIoc.Maui.Tests.Fixtures.Navigation;
+
+public class WindowManagerTests : TestBase
+{
+    public WindowManagerTests(ITestOutputHelper testOutputHelper)
+        : base(testOutputHelper)
+    {
+    }
+
+    [Theory]
+    [InlineData("NavigationPage/MockViewA/MockViewB/MockViewC")]
+    [InlineData("MockHome/NavigationPage/MockViewA")]
+    public void WindowManagerGetsNavigationServiceFromCurrentPage(string uri)
+    {
+        var mauiApp = CreateBuilder(prism => prism.CreateWindow(uri))
+            .Build();
+        var window = GetWindow(mauiApp);
+
+        var rootPage = window.Page;
+        var currentPage = rootPage;
+        if (rootPage is NavigationPage navigationPage)
+        {
+            currentPage = navigationPage.CurrentPage;
+        }
+        if (rootPage is FlyoutPage flyoutPage && flyoutPage.Detail is NavigationPage detailPage)
+        {
+            currentPage = detailPage.CurrentPage;
+        }
+
+        var currentNavigationService = Prism.Navigation.Xaml.Navigation.GetNavigationService(currentPage);
+        var windowManager = rootPage.GetContainerProvider().Resolve<IWindowManager>();
+        Assert.Same(currentNavigationService, windowManager.GetCurrentNavigationService());
+    }
+}