Enhance ServiceProvider for Unit Tests

src/UraniumUI/UraniumServiceProvider.cs

@@ -13,6 +13,6 @@ public static IServiceProvider Current
 #elif IOS || MACCATALYST
 			MauiUIApplicationDelegate.Current.Services;
 #else
-			null;
+            Application.Current.Handler.MauiContext.Services;
 #endif
 }

test/UraniumUI.Material.Tests/Controls/MultiplePickerField_Test.cs

@@ -1,5 +1,8 @@
-using System.Collections.ObjectModel;
+using Shouldly;
+using System.Collections.ObjectModel;
+using UraniumUI.Dialogs;
 using UraniumUI.Material.Controls;
+using UraniumUI.Material.Tests.Mocks;
 using UraniumUI.Tests.Core;
 
 namespace UraniumUI.Material.Tests.Controls;
@@ -8,27 +11,27 @@ public class MultiplePickerField_Test
 {
     public MultiplePickerField_Test()
     {
-        ApplicationExtensions.CreateAndSetMockApplication();
+        ApplicationExtensions.CreateAndSetMockApplication(builder =>
+        {
+            builder.Services.AddSingleton<IDialogService, MockDialogService>();
+        });
     }
-
-    private string[] GetItemsSource() => new string[] { "Option 1", "Option 2", "Option 3", "Option 4", };
 
     [Fact]
     public void Initialize_WithSelectedItems()
     {
         var control = AnimationReadyHandler.Prepare(new MultiplePickerField());
         var viewModel = new TestViewModel();
         viewModel.SelectedItems.Add(viewModel.ItemsSource[0]);
-        viewModel.SelectedItems.Add(viewModel.ItemsSource[2]);
 
         control.BindingContext = viewModel;
         control.ItemsSource = viewModel.ItemsSource;
 
         control.SetBinding(MultiplePickerField.SelectedItemsProperty, new Binding(nameof(TestViewModel.SelectedItems)));
 
         // Assert
-        Assert.True(control.SelectedItems.Contains(viewModel.ItemsSource[0]));
-        Assert.True(control.SelectedItems.Contains(viewModel.ItemsSource[2]));
+        control.SelectedItems.Count.ShouldBe(1);
+        control.SelectedItems[0].ShouldBe(viewModel.ItemsSource[0]);
     }
 
     public class TestViewModel : UraniumBindableObject

test/UraniumUI.Material.Tests/Mocks/MockDialogService.cs

@@ -0,0 +1,25 @@
+using UraniumUI.Dialogs;
+
+namespace UraniumUI.Material.Tests.Mocks;
+internal class MockDialogService : IDialogService
+{
+    public Task<bool> ConfirmAsync(string title, string message, string okText = "OK", string cancelText = "Cancel")
+    {
+        return Task.FromResult(default(bool));
+    }
+
+    public Task<IEnumerable<T>> DisplayCheckBoxPromptAsync<T>(string message, IEnumerable<T> selectionSource, IEnumerable<T> selectedItems = null, string accept = "OK", string cancel = "Cancel", string displayMember = null)
+    {
+        return Task.FromResult(Enumerable.Empty<T>());
+    }
+
+    public Task<T> DisplayRadioButtonPromptAsync<T>(string message, IEnumerable<T> selectionSource, T selected = default, string accept = "Ok", string cancel = "Cancel", string displayMember = null)
+    {
+        return Task.FromResult(default(T));
+    }
+
+    public Task<string> DisplayTextPromptAsync(string title, string message, string accept = "OK", string cancel = "Cancel", string placeholder = null, int maxLength = -1, Keyboard keyboard = null, string initialValue = "")
+    {
+        return Task.FromResult(string.Empty);
+    }
+}

test/UraniumUI.Tests.Core/ApplicationExtensions.cs

@@ -14,12 +14,18 @@ public static Window LoadPage(this Application app, Page page)
         return ((IApplication)app).CreateWindow(null) as Window;
     }
 
-    public static void CreateAndSetMockApplication()
+    public static void CreateAndSetMockApplication(Action<MauiAppBuilder> builder = null)
     {
         var appBuilder = MauiApp.CreateBuilder()
                                 .UseMauiApp<MockApplication>();
+
+        builder?.Invoke(appBuilder);
+
         var mauiApp = appBuilder.Build();
         var application = mauiApp.Services.GetRequiredService<IApplication>();
+
+        Application.Current = application as Application;
+
         application.Handler = new ApplicationHandlerStub();
         application.Handler.SetMauiContext(new HandlersContextStub(mauiApp.Services));
     }