Add cancel after snippets

Author: stevenaw

docs/articles/nunit/writing-tests/attributes/cancelafter.md

@@ -37,16 +37,11 @@ When used on test methods, NUnit automatically adds an extra argument to your me
 
 ## Example
 
-```csharp
-[Test, CancelAfter(2000)]
-public void RunningTestUntilCanceled(CancellationToken token)
-{
-    while (!token.IsCancellationRequested)
-    {
-        /* */
-    }
-}
+[!code-csharp[TestWithCancellationToken](~/snippets/Snippets.NUnit/Attributes/CancelAfterAttributeExamples.cs#TestWithCancellationToken)]
 
+[!code-csharp[TestCaseSourceWithCancellationToken](~/snippets/Snippets.NUnit/Attributes/CancelAfterAttributeExamples.cs#TestCaseSourceWithCancellationToken)]
+
+```csharp
 [CancelAfter(2000)]
 [TestCase("http://server1")]
 [TestCase("http://server2")]

docs/snippets/Snippets.NUnit/Attributes/CancelAfterAttributeExamples.cs

@@ -0,0 +1,38 @@
+using NUnit.Framework;
+#pragma warning disable NUnit1029  // Pending https://github.com/nunit/nunit.analyzers/issues/957
+
+namespace Snippets.NUnit.Attributes
+{
+    public class CancelAfterAttributeExamples
+    {
+        #region TestWithCancellationToken
+
+        [Test, CancelAfter(2_000)]
+        public void RunningTestUntilCanceled(CancellationToken cancellationToken)
+        {
+            while (!cancellationToken.IsCancellationRequested)
+            {
+                /* */
+            }
+        }
+
+        #endregion
+
+        #region TestCaseSourceWithCancellationToken
+
+        private static int[] _simpleValues = { 2, 4, 6, 8 };
+
+        [TestCaseSource(nameof(_simpleValues)), CancelAfter(1_000)]
+        public async Task TestCaseSourceWithCancellationToken(int a, CancellationToken cancellationToken)
+        {
+            Assert.That(cancellationToken, Is.Not.Default);
+
+            while (!cancellationToken.IsCancellationRequested)
+            {
+                /* */
+            }
+        }
+
+        #endregion
+    }
+}

docs/snippets/Snippets.NUnit/Snippets.NUnit.csproj

@@ -10,7 +10,7 @@
 
     <ItemGroup>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
-        <PackageReference Include="NUnit" Version="4.5.0-alpha.0.20" />
+        <PackageReference Include="NUnit" Version="4.5.0-alpha.0.25" />
         <PackageReference Include="NUnit3TestAdapter" Version="6.0.0" />
         <PackageReference Include="NUnit.Analyzers" Version="4.11.2">
             <PrivateAssets>all</PrivateAssets>