Fixes #4374 - Nukes all (?) legacy Driver and Application stuff; revamps tests (#4376)

Tests/UnitTests/View/Draw/DrawTests.cs

@@ -111,7 +111,7 @@ public class DrawTests (ITestOutputHelper output)
     }
 
     [Fact]
-    [SetupFakeDriver]
+    [SetupFakeApplication]
     public void Draw_Minimum_Full_Border_With_Empty_Viewport ()
     {
         var view = new View { Width = 2, Height = 2, BorderStyle = LineStyle.Single };
@@ -136,7 +136,7 @@ public class DrawTests (ITestOutputHelper output)
     }
 
     [Fact]
-    [SetupFakeDriver]
+    [SetupFakeApplication]
     public void Draw_Minimum_Full_Border_With_Empty_Viewport_Without_Bottom ()
     {
         var view = new View { Width = 2, Height = 1, BorderStyle = LineStyle.Single };
@@ -154,7 +154,7 @@ public class DrawTests (ITestOutputHelper output)
     }
 
     [Fact]
-    [SetupFakeDriver]
+    [SetupFakeApplication]
     public void Draw_Minimum_Full_Border_With_Empty_Viewport_Without_Left ()
     {
         var view = new View { Width = 1, Height = 2, BorderStyle = LineStyle.Single };
@@ -179,7 +179,7 @@ public class DrawTests (ITestOutputHelper output)
     }
 
     [Fact]
-    [SetupFakeDriver]
+    [SetupFakeApplication]
     public void Draw_Minimum_Full_Border_With_Empty_Viewport_Without_Right ()
     {
         var view = new View { Width = 1, Height = 2, BorderStyle = LineStyle.Single };
@@ -204,7 +204,7 @@ public class DrawTests (ITestOutputHelper output)
     }
 
     [Fact]
-    [SetupFakeDriver]
+    [SetupFakeApplication]
     public void Draw_Minimum_Full_Border_With_Empty_Viewport_Without_Top ()
     {
         var view = new View { Width = 2, Height = 1, BorderStyle = LineStyle.Single };
@@ -582,7 +582,7 @@ public class DrawTests (ITestOutputHelper output)
     }
 
     [Theory]
-    [SetupFakeDriver]
+    [SetupFakeApplication]
     [InlineData ("𝔽𝕆𝕆𝔹𝔸R")]
     [InlineData ("a𐐀b")]
     public void DrawHotString_NonBmp (string expected)
@@ -635,22 +635,15 @@ public class DrawTests (ITestOutputHelper output)
     }
 
     [Fact]
-    [TestRespondersDisposed]
+    [AutoInitShutdown]
     public void Draw_Throws_IndexOutOfRangeException_With_Negative_Bounds ()
     {
-        Application.Init (new FakeDriver ());
-
         Toplevel top = new ();
 
         var view = new View { X = -2, Text = "view" };
         top.Add (view);
 
-        Application.Iteration += (s, a) =>
-                                 {
-                                     Assert.Equal (-2, view.X);
-
-                                     Application.RequestStop ();
-                                 };
+        Application.Iteration += OnApplicationOnIteration;
 
         try
         {
@@ -661,11 +654,24 @@ public class DrawTests (ITestOutputHelper output)
             // After the fix this exception will not be caught.
             Assert.IsType<IndexOutOfRangeException> (ex);
         }
+        finally
+        {
+            Application.Iteration -= OnApplicationOnIteration;
+        }
 
         top.Dispose ();
 
         // Shutdown must be called to safely clean up Application if Init has been called
         Application.Shutdown ();
+
+        return;
+
+        void OnApplicationOnIteration (object? s, IterationEventArgs a)
+        {
+            Assert.Equal (-2, view.X);
+
+            Application.RequestStop ();
+        }
     }
 
 
@@ -685,7 +691,7 @@ public class DrawTests (ITestOutputHelper output)
         };
         Toplevel top = new ();
         top.Add (label, view);
-        RunState runState = Application.Begin (top);
+        SessionToken sessionToken = Application.Begin (top);
         AutoInitShutdownAttribute.RunIteration ();
 
         DriverAssert.AssertDriverContentsWithFrameAre (
@@ -713,7 +719,7 @@ At 0,0
    A text wit",
                                                       output
                                                      );
-        Application.End (runState);
+        Application.End (sessionToken);
         top.Dispose ();
     }
 
@@ -733,7 +739,7 @@ At 0,0
         };
         Toplevel top = new ();
         top.Add (label, view);
-        RunState runState = Application.Begin (top);
+        SessionToken sessionToken = Application.Begin (top);
 
         top.Draw ();
 
@@ -766,7 +772,7 @@ At 0,0
         ,
                                                       output
                                                      );
-        Application.End (runState);
+        Application.End (sessionToken);
         top.Dispose ();
     }
 
@@ -786,7 +792,7 @@ At 0,0
         };
         Toplevel top = new ();
         top.Add (label, view);
-        RunState runState = Application.Begin (top);
+        SessionToken sessionToken = Application.Begin (top);
         AutoInitShutdownAttribute.RunIteration ();
 
         DriverAssert.AssertDriverContentsWithFrameAre (
@@ -812,7 +818,7 @@ At 0,0
         ,
                                                       output
                                                      );
-        Application.End (runState);
+        Application.End (sessionToken);
         top.Dispose ();
     }
 
@@ -832,7 +838,7 @@ At 0,0
         };
         Toplevel top = new ();
         top.Add (label, view);
-        RunState runState = Application.Begin (top);
+        SessionToken sessionToken = Application.Begin (top);
 
         top.Draw ();
 
@@ -864,7 +870,7 @@ At 0,0
         ,
                                                       output
                                                      );
-        Application.End (runState);
+        Application.End (sessionToken);
         top.Dispose ();
     }
     public class DerivedView : View