feat(centralui): Site Call KPI tiles on the Health dashboard

tests/ScadaLink.CentralUI.Tests/Pages/HealthPageTests.cs

@@ -9,6 +9,7 @@ using NSubstitute;
 using ScadaLink.CentralUI.Services;
 using ScadaLink.Commons.Entities.Sites;
 using ScadaLink.Commons.Interfaces.Repositories;
+using ScadaLink.Commons.Messages.Audit;
 using ScadaLink.Commons.Messages.Notification;
 using ScadaLink.Commons.Types;
 using ScadaLink.Communication;
@@ -37,6 +38,13 @@ public class HealthPageTests : BunitContext
         new("k", true, null, QueueDepth: 12, StuckCount: 4, ParkedCount: 3,
             DeliveredLastInterval: 88, OldestPendingAge: TimeSpan.FromMinutes(6));
 
+    // Site Call Audit (#22) Task 7 — mutable scripted Site Call KPI reply. Tests
+    // that target the Site Call tiles override this before rendering.
+    private SiteCallKpiResponse _siteCallKpiReply =
+        new("k", true, null, BufferedCount: 9, ParkedCount: 2, FailedLastInterval: 1,
+            DeliveredLastInterval: 40, OldestPendingAge: TimeSpan.FromMinutes(3),
+            StuckCount: 5);
+
     public HealthPageTests()
     {
         _comms = new CommunicationService(
@@ -45,6 +53,9 @@ public class HealthPageTests : BunitContext
 
         var outbox = _system.ActorOf(Props.Create(() => new ScriptedOutboxActor(this)));
         _comms.SetNotificationOutbox(outbox);
+
+        var siteCallAudit = _system.ActorOf(Props.Create(() => new ScriptedSiteCallAuditActor(this)));
+        _comms.SetSiteCallAudit(siteCallAudit);
         Services.AddSingleton(_comms);
 
         var aggregator = Substitute.For<ICentralHealthAggregator>();
@@ -133,6 +144,53 @@ public class HealthPageTests : BunitContext
         });
     }
 
+    [Fact]
+    public void Renders_SiteCallKpiTiles_WithValues()
+    {
+        var cut = Render<HealthPage>();
+
+        // KPI data arrives via an async actor Ask after first render.
+        cut.WaitForAssertion(() =>
+        {
+            Assert.Contains("Site Calls", cut.Markup);
+            // The three Site Call tiles render at the documented data-test selectors.
+            Assert.Contains("data-test=\"site-call-kpi-buffered\"", cut.Markup);
+            Assert.Contains("data-test=\"site-call-kpi-stuck\"", cut.Markup);
+            Assert.Contains("data-test=\"site-call-kpi-parked\"", cut.Markup);
+            // KPI numeric values surface in the tiles.
+            Assert.Contains(">9<", cut.Markup);  // BufferedCount
+            Assert.Contains(">5<", cut.Markup);  // StuckCount
+            Assert.Contains(">2<", cut.Markup);  // ParkedCount
+        });
+    }
+
+    [Fact]
+    public void RendersLinkToTheSiteCallsReportPage()
+    {
+        var cut = Render<HealthPage>();
+        var link = cut.Find("a[href='/site-calls/report']");
+        Assert.Contains("View details", link.TextContent);
+    }
+
+    [Fact]
+    public void SiteCallKpiFailure_ShowsGracefulFallback()
+    {
+        _siteCallKpiReply = new SiteCallKpiResponse(
+            "k", false, "site call repository unavailable", 0, 0, 0, 0, null, 0);
+
+        var cut = Render<HealthPage>();
+
+        cut.WaitForAssertion(() =>
+        {
+            // Failure must not crash the page; tiles fall back to a dash and the
+            // inline error message surfaces.
+            Assert.Contains("Site Calls", cut.Markup);
+            Assert.Contains("Site Call KPIs unavailable", cut.Markup);
+            Assert.Contains("site call repository unavailable", cut.Markup);
+            Assert.Contains(">—<", cut.Markup);
+        });
+    }
+
     [Fact]
     public void OutboxKpiFailure_ShowsGracefulFallback()
     {
@@ -170,4 +228,16 @@ public class HealthPageTests : BunitContext
             Receive<NotificationKpiRequest>(_ => Sender.Tell(test._kpiReply));
         }
     }
+
+    /// <summary>
+    /// Stand-in for the Site Call Audit actor. Replies to the KPI request with
+    /// the test's currently-scripted response.
+    /// </summary>
+    private sealed class ScriptedSiteCallAuditActor : ReceiveActor
+    {
+        public ScriptedSiteCallAuditActor(HealthPageTests test)
+        {
+            Receive<SiteCallKpiRequest>(_ => Sender.Tell(test._siteCallKpiReply));
+        }
+    }
 }