more audit work

src/__Tests/chaos/StellaOps.Chaos.Router.Tests/Fixtures/RouterTestFixture.cs

@@ -6,6 +6,7 @@
 // -----------------------------------------------------------------------------
 
 using System.Net.Http.Json;
+using Xunit.Sdk;
 
 namespace StellaOps.Chaos.Router.Tests.Fixtures;
 
@@ -57,10 +58,18 @@ public class RouterTestFixture : IAsyncLifetime
         return JsonContent.Create(request);
     }
 
-    public ValueTask InitializeAsync()
+    public async ValueTask InitializeAsync()
     {
-        // Verify router is reachable
-        return ValueTask.CompletedTask;
+        try
+        {
+            using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(2));
+            _ = await _client.GetAsync("/", cts.Token);
+        }
+        catch (Exception ex) when (ex is HttpRequestException || ex is TaskCanceledException || ex is OperationCanceledException)
+        {
+            throw SkipException.ForSkip(
+                $"Router not reachable at '{_routerUrl}'. Set ROUTER_URL or start the router service to run chaos tests.");
+        }
     }
 
     public ValueTask DisposeAsync()