Transitions in edit mode and on output: program transitions run while recording or streaming; the preview animates the outgoing picture (fade/move fade, wipe shrinks) in every mode

Test: PreviewTransitionTests (with the transition, wipe, and brand logo tests).
2026-10-27 10:20:53 -07:00
parent 841c905c06
commit 7da287244b
4 changed files with 121 additions and 1 deletions
@@ -0,0 +1,66 @@
+using System;
+using System.Linq;
+using Xunit;
+using ytLive.Models;
+using ytLive.Services;
+using ytLive.ViewModels;
+
+namespace ytLive.Tests;
+
+/// <summary>
+/// A scene switch in edit mode raises the preview transition with the chosen type and
+/// length, before the staged scene changes, so the preview can animate the old picture.
+/// </summary>
+[Collection("RealApp")]
+public sealed class PreviewTransitionTests
+{
+    private readonly RealAppHost _app;
+
+    public PreviewTransitionTests(RealAppHost app) => _app = app;
+
+    [Fact]
+    public void Scene_Switch_In_Edit_Mode_Raises_The_Preview_Transition_Before_The_Switch()
+    {
+        _app.Run(Run);
+    }
+
+    private static void Run()
+    {
+        var tempDb = System.IO.Path.Combine(System.IO.Path.GetTempPath(), $"ytLlive-preview-{Guid.NewGuid():N}.db");
+        MainViewModel.LayoutPathOverride = tempDb;
+        try
+        {
+            using (var schema = new LayoutStore(tempDb)) { }
+            Microsoft.Data.Sqlite.SqliteConnection.ClearAllPools();
+
+            var vm = new MainViewModel();
+            var from = vm.StagedScene!;
+            var to = vm.Scenes.First(s => s != from && !s.IsHidden);
+            vm.SelectedTransitionType = TransitionType.Fade;
+            vm.TransitionDurationMs = 800;
+
+            Scene? stagedWhenRaised = null;
+            TransitionType? typeRaised = null;
+            double? msRaised = null;
+            vm.PreviewTransition += (type, ms) =>
+            {
+                stagedWhenRaised = vm.StagedScene;
+                typeRaised = type;
+                msRaised = ms;
+            };
+
+            vm.TransitionToScene(to);
+
+            Assert.Same(from, stagedWhenRaised);
+            Assert.Equal(TransitionType.Fade, typeRaised);
+            Assert.Equal(800, msRaised);
+            Assert.Same(to, vm.StagedScene);
+        }
+        finally
+        {
+            MainViewModel.LayoutPathOverride = null;
+            Microsoft.Data.Sqlite.SqliteConnection.ClearAllPools();
+            try { System.IO.File.Delete(tempDb); } catch { }
+        }
+    }
+}