Smoke-test /health for the reachable (200) and unreachable (503) cases

Elternbeirat.Web.Tests/RouteSmokeTests.cs

@@ -1,5 +1,4 @@
 using System.Net;
-using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Mvc.Testing;
 
 namespace Elternbeirat.Web.Tests;
@@ -140,4 +139,34 @@ public sealed class RouteSmokeTests : IDisposable
 
         html.ShouldContain("Förderverein"); // the page body, rendered from Markdown
     }
+
+    [Fact]
+    public async Task Health_returns_200_when_PocketBase_is_reachable()
+    {
+        // The monitor's happy path: the app answers and PocketBase (the seeded
+        // fixture) is up, so /health is 200. This mostly guards the wiring -- that the
+        // endpoint exists and reaches the client -- since the fixture keeps PocketBase
+        // alive; the unreachable case is covered separately below.
+        var client = _factory.CreateClient();
+
+        var response = await client.GetAsync(new Uri("/health", UriKind.Relative));
+
+        response.StatusCode.ShouldBe(HttpStatusCode.OK);
+    }
+
+    [Fact]
+    public async Task Health_returns_503_when_PocketBase_is_unreachable()
+    {
+        // The case the monitor exists for: the app is up but PocketBase is not. Point a
+        // throwaway app at a dead address (nothing listens on port 1, so the probe is
+        // refused at once, no timeout wait) and assert /health reports 503 rather than
+        // claiming healthy.
+        await using var factory = _baseFactory.WithWebHostBuilder(builder =>
+            builder.UseSetting("PocketBase:BaseUrl", "http://localhost:1"));
+        var client = factory.CreateClient();
+
+        var response = await client.GetAsync(new Uri("/health", UriKind.Relative));
+
+        response.StatusCode.ShouldBe(HttpStatusCode.ServiceUnavailable);
+    }
 }