ON-AIR sign right of REC: gray offline, red public, green private

ytLive.Tests/OnAirSignTests.cs

@@ -0,0 +1,63 @@
+using System;
+using System.ComponentModel;
+using Xunit;
+using ytLive.Models;
+using ytLive.ViewModels;
+
+namespace ytLive.Tests;
+
+/// <summary>
+/// The ON-AIR sign (right of REC in the top bar): gray offline, red when
+/// streaming public, green when streaming private. Driven through the real
+/// MainViewModel so StreamStatus/StreamVisibility notification wiring is
+/// exercised, not just the computed property.
+/// </summary>
+[Collection("RealApp")]
+public sealed class OnAirSignTests
+{
+    [Fact]
+    public void OnAirBrush_Follows_Offline_Public_And_Private()
+    {
+        _app.Run(Run);
+    }
+
+    private readonly RealAppHost _app;
+
+    public OnAirSignTests(RealAppHost app) => _app = app;
+
+    private void Run()
+    {
+        var tempDb = System.IO.Path.Combine(System.IO.Path.GetTempPath(), $"ytLlive-onair-{Guid.NewGuid():N}.db");
+        MainViewModel.LayoutPathOverride = tempDb;
+        try
+        {
+            using (var schema = new ytLive.Services.LayoutStore(tempDb)) { }
+            Microsoft.Data.Sqlite.SqliteConnection.ClearAllPools();
+
+            var vm = new MainViewModel();
+
+            Assert.Equal(StreamStatus.Offline, vm.StreamStatus);
+            Assert.Equal("#555555", vm.OnAirBrush);
+
+            var raised = 0;
+            vm.PropertyChanged += (_, e) => { if (e.PropertyName == nameof(MainViewModel.OnAirBrush)) raised++; };
+
+            vm.StreamVisibility = "Public";
+            Assert.Equal("#555555", vm.OnAirBrush);
+
+            vm.StreamStatus = StreamStatus.Streaming;
+            Assert.Equal("#e94560", vm.OnAirBrush);
+
+            vm.StreamVisibility = "Private";
+            Assert.Equal("#22c55e", vm.OnAirBrush);
+
+            Assert.Equal(3, raised);
+        }
+        finally
+        {
+            MainViewModel.LayoutPathOverride = null;
+            Microsoft.Data.Sqlite.SqliteConnection.ClearAllPools();
+            try { System.IO.File.Delete(tempDb); } catch { /* best-effort cleanup */ }
+        }
+    }
+}