Switch to Xunit for unit testing

Replaced NUnit with Xunit in the test project. Updated test attributes and assertions accordingly to ensure compatibility with Xunit framework.

Author: Magnus Ahlberg

TabBlazor.Tests/GlobalUsings.cs

@@ -0,0 +1,3 @@
+// Global using directives
+
+global using Xunit;

TabBlazor.Tests/RenderComponentTests.cs

@@ -1,24 +1,23 @@
-using NUnit.Framework;
-using Tabler.Docs.Components.Modals;
+using Tabler.Docs.Components.Modals;
 
 namespace TabBlazor.Tests
 {
     public class RenderComponentTests
     {
-        [Test]
+        [Fact]
         public void RenderComponent_can_render_when_setting_cascading_parameters()
         {
             var component = new RenderComponent<TestModalContent>()
                 .Set(p => p.CascadingParameter, true);
-            Assert.IsNotNull(component);
+            Assert.NotNull(component);
         }
 
-        [Test]
+        [Fact]
         public void RenderComponent_can_render_when_setting_parameters()
         {
             var component = new RenderComponent<TestModalContent>()
                 .Set(p => p.ReportName, "TestReport");
-            Assert.IsNotNull(component);
+            Assert.NotNull(component);
         }
     }
 }

TabBlazor.Tests/TabBlazor.Tests.csproj

@@ -10,12 +10,15 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.0" />
-    <PackageReference Include="NUnit" Version="4.2.2" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
     <PackageReference Include="coverlet.collector" Version="6.0.2">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
+    <PackageReference Include="xunit" Version="2.9.0" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
   </ItemGroup>
 
   <ItemGroup>

TabBlazor.Tests/ToastServiceTests.cs

@@ -1,14 +1,13 @@
 using System.Linq;
 using System.Threading;
-using NUnit.Framework;
 using TabBlazor.Services;
 using Tabler.Docs.Components.Modals;
 
 namespace TabBlazor.Tests
 {
     public class ToastServiceTests
     {
-        [Test]
+        [Fact]
         public void ToastService_is_thread_safe()
         {
             var service = new ToastService();
@@ -30,9 +29,9 @@ public void ToastService_is_thread_safe()
             var toastMessages = service.Toasts.ToList();
             for (var i = 0; i < maxWorkers; i++)
             {
-                Assert.IsTrue(toastMessages.Any(t => t.Title == $"title-{i}"), "Element was not added to the toast list");
+                Assert.True(toastMessages.Any(t => t.Title == $"title-{i}"), "Element was not added to the toast list");
             }
-            Assert.AreEqual(maxWorkers, toastMessages.Count, "Toast count does not match worker count.");
+            Assert.Equal(maxWorkers, toastMessages.Count);
 
         }
     }