fix: track Tornado program windows across focus changes

tests/MBN_STOCK_WEBVIEW.Playout.Tests/PlayoutSafetyValidationTests.cs

@@ -1,5 +1,6 @@
 using MBN_STOCK_WEBVIEW.Playout.Configuration;
 using MBN_STOCK_WEBVIEW.Playout.Runtime;
+using System.Text.RegularExpressions;
 
 namespace MBN_STOCK_WEBVIEW.Playout.Tests;
 
@@ -53,6 +54,136 @@ public sealed class PlayoutSafetyValidationTests : IDisposable
         Assert.Equal(expected, TornadoProcessProbe.HasExplicitTestMarker(title));
     }
 
+    [Fact]
+    public void ClassifyWindowTitles_EditorAndPgmRemainTheSameProgramGeneration_WhenFocusOrderChanges()
+    {
+        string[] editorFirst = ["Tornado2 - [5001.t2s]", "PGM"];
+        string[] pgmFirst = ["PGM", "Tornado2 - [5001.t2s]"];
+
+        var first = TornadoProcessProbe.ClassifyWindowTitles(editorFirst, testWindowPattern: null);
+        var second = TornadoProcessProbe.ClassifyWindowTitles(pgmFirst, testWindowPattern: null);
+
+        Assert.True(first.IsProgram);
+        Assert.True(first.IsEligible);
+        Assert.Equal(first, second);
+
+        var identity = new TornadoProcessIdentity(42, 123456789);
+        var firstGeneration = TornadoProcessGeneration.FromIdentities(
+            "program",
+            first.IsProgram ? [identity] : []);
+        var secondGeneration = TornadoProcessGeneration.FromIdentities(
+            "program",
+            second.IsProgram ? [identity] : []);
+
+        Assert.Equal(firstGeneration, secondGeneration);
+    }
+
+    [Fact]
+    public void ClassifyWindowTitles_TestModeAcceptsExplicitTestTitleFromAnyTopLevelWindow()
+    {
+        var pattern = new Regex(
+            "^Tornado2 TEST$",
+            RegexOptions.CultureInvariant,
+            TimeSpan.FromMilliseconds(100));
+
+        var classification = TornadoProcessProbe.ClassifyWindowTitles(
+            ["Tornado2 - [test-editor]", "Tornado2 TEST"],
+            pattern);
+
+        Assert.False(classification.IsProgram);
+        Assert.True(classification.IsEligible);
+    }
+
+    [Fact]
+    public void ClassifyWindowTitles_TestModeRejectsProcessThatAlsoOwnsPgmWindow()
+    {
+        var pattern = new Regex(
+            "^Tornado2 TEST$",
+            RegexOptions.CultureInvariant,
+            TimeSpan.FromMilliseconds(100));
+
+        var classification = TornadoProcessProbe.ClassifyWindowTitles(
+            ["Tornado2 TEST", "PGM"],
+            pattern);
+
+        Assert.True(classification.IsProgram);
+        Assert.False(classification.IsEligible);
+    }
+
+    [Fact]
+    public void ClassifyWindowTitles_NoMeaningfulTitlesFailsClosedAsProgram()
+    {
+        var pattern = new Regex(
+            "^Tornado2 TEST$",
+            RegexOptions.CultureInvariant,
+            TimeSpan.FromMilliseconds(100));
+
+        var classification = TornadoProcessProbe.ClassifyWindowTitles(
+            [null, "", "   "],
+            pattern);
+
+        Assert.True(classification.IsProgram);
+        Assert.False(classification.IsEligible);
+    }
+
+    [Fact]
+    public void TryClassifyWindowSnapshot_InspectionFailureFailsClosed()
+    {
+        var snapshot = new TornadoWindowTitleSnapshot(
+            ["PGM"],
+            InspectionSucceeded: false);
+
+        var succeeded = TornadoProcessProbe.TryClassifyWindowSnapshot(
+            snapshot,
+            testWindowPattern: null,
+            out var classification);
+
+        Assert.False(succeeded);
+        Assert.Equal(default, classification);
+    }
+
+    [Fact]
+    public void TryClassifyWindowSnapshot_NoMeaningfulTitlesFailsIdentityInspection()
+    {
+        var snapshot = new TornadoWindowTitleSnapshot(
+            ["", "   "],
+            InspectionSucceeded: true);
+
+        var succeeded = TornadoProcessProbe.TryClassifyWindowSnapshot(
+            snapshot,
+            testWindowPattern: null,
+            out var classification);
+
+        Assert.False(succeeded);
+        Assert.Equal(default, classification);
+    }
+
+    [Fact]
+    public void TryClassifyWindowSnapshot_PgmTitleSucceedsForLiveIdentityInspection()
+    {
+        var snapshot = new TornadoWindowTitleSnapshot(
+            ["Tornado2 - [5001.t2s]", "PGM"],
+            InspectionSucceeded: true);
+
+        var succeeded = TornadoProcessProbe.TryClassifyWindowSnapshot(
+            snapshot,
+            testWindowPattern: null,
+            out var classification);
+
+        Assert.True(succeeded);
+        Assert.True(classification.IsProgram);
+        Assert.True(classification.IsEligible);
+    }
+
+    [Fact]
+    public void WindowTitleProbe_InvalidProcessIdFailsClosedWithoutNativeInspection()
+    {
+        var snapshot = new Win32TornadoWindowTitleProbe().Capture(0);
+
+        Assert.False(snapshot.InspectionSucceeded);
+        Assert.Empty(snapshot.Titles);
+    }
+
     [Theory]
     [InlineData(0, false)]
     [InlineData(1, true)]