Add test

Author: maxkoshevoi

samples/XCT.Sample/Pages/TestCases/SnackBarActionExceptionPage.xaml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<pages:BasePage
+    x:Class="Xamarin.CommunityToolkit.Sample.Pages.TestCases.SnackBarActionExceptionPage"
+    xmlns="http://xamarin.com/schemas/2014/forms"
+    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+    xmlns:pages="clr-namespace:Xamarin.CommunityToolkit.Sample.Pages">
+    
+    <ContentPage.Content>
+        <Grid RowDefinitions="auto, *, *">
+            <Button Text="App shouldn't crash when you press this and execute action." Clicked="ShowSnackBar" />
+        </Grid>
+    </ContentPage.Content>
+    
+</pages:BasePage>

samples/XCT.Sample/Pages/TestCases/SnackBarActionExceptionPage.xaml.cs

@@ -0,0 +1,22 @@
+using System;
+using Xamarin.CommunityToolkit.Extensions;
+
+namespace Xamarin.CommunityToolkit.Sample.Pages.TestCases
+{
+	public partial class SnackBarActionExceptionPage
+	{
+		public SnackBarActionExceptionPage() => InitializeComponent();
+
+		async void ShowSnackBar(object sender, EventArgs e)
+		{
+			try
+			{
+				await this.DisplaySnackBarAsync("Execute action to throw exception", "Throw exception", () => throw new Exception());
+			}
+			catch
+			{
+				await this.DisplayToastAsync("Exception caught");
+			}
+		}
+	}
+}

samples/XCT.Sample/ViewModels/TestCases/TestCasesGalleryViewModel.cs

@@ -11,7 +11,7 @@ protected override IEnumerable<SectionModel> CreateItems() => new[]
 			new SectionModel(
 				typeof(TouchEffectButtonPage),
 				"TouchEffect + Button",
-				"TouchEffect must automatically invoke button'c command execution."),
+				"TouchEffect must automatically invoke button's command execution."),
 
 			new SectionModel(
 				typeof(TouchEffectCollectionViewPage),
@@ -27,6 +27,11 @@ protected override IEnumerable<SectionModel> CreateItems() => new[]
 				typeof(TabViewBindingPage),
 				"TabView BindingContext",
 				"TabView with BindingContext into MainPage and other BindingContext into TabViewItem."),
+
+			new SectionModel(
+				typeof(SnackBarActionExceptionPage),
+				"SnackBar Action Exception",
+				"Exception in SnackBar's action doesn't crash the app."),
 		};
 	}
 }

samples/XCT.Sample/Xamarin.CommunityToolkit.Sample.csproj

@@ -22,6 +22,9 @@
   </ItemGroup>
 
   <ItemGroup>
+    <Compile Update="Pages\TestCases\SnackBarActionExceptionPage.xaml.cs">
+      <DependentUpon>SnackBarActionExceptionPage.xaml</DependentUpon>
+    </Compile>
     <Compile Update="Pages\TestCases\TabViewItemBindingView.xaml.cs">
       <DependentUpon>TabViewItemBindingView.xaml</DependentUpon>
     </Compile>

src/CommunityToolkit/Xamarin.CommunityToolkit/Views/Snackbar/Options/ToastOptions.shared.cs

@@ -44,8 +44,8 @@ public class ToastOptions
 		/// </summary>
 		public TaskCompletionSource<bool> Result { get; }
 
-		public void SetResult(bool result) => Result.SetResult(result);
+		public bool SetResult(bool result) => Result.TrySetResult(result);
 
-		public void SetException(Exception exception) => Result.SetException(exception);
+		public bool SetException(Exception exception) => Result.TrySetException(exception);
 	}
 }