Restoring unit test from v1.

UnitTests/Views/ListViewTests.cs

@@ -759,4 +759,39 @@ public void Clicking_On_Border_Is_Ignored ()
         Assert.Equal ("Three", selected);
         Assert.Equal (2, lv.SelectedItem);
     }
+
+    [Fact]
+    [AutoInitShutdown]
+    public void LeftItem_TopItem_Tests ()
+    {
+        var source = new List<string> ();
+        for (int i = 0; i < 5; i++) {
+            source.Add ($"Item {i}");
+        }
+        var lv = new ListView () {
+            X = 1,
+            Width = 10,
+            Height = 5,
+            Source = new ListWrapper (source)
+        };
+        var top = new Toplevel ();
+        top.Add (lv);
+        Application.Begin (top);
+
+        TestHelpers.AssertDriverContentsWithFrameAre (@"
+ Item 0
+ Item 1
+ Item 2
+ Item 3
+ Item 4", _output);
+
+        lv.LeftItem = 1;
+        lv.TopItem = 1;
+        Application.Refresh ();
+        TestHelpers.AssertDriverContentsWithFrameAre (@"
+ tem 1
+ tem 2
+ tem 3
+ tem 4", _output);
+    }
 }