Clarified test a little

diff --git a/test/jalview/gui/ValidColumnSelectionTest.java b/test/jalview/gui/ValidColumnSelectionTest.java
index c65f236..217fcdd 100644 (file)
--- a/test/jalview/gui/ValidColumnSelectionTest.java
+++ b/test/jalview/gui/ValidColumnSelectionTest.java
@@ -40,7 +40,11 @@ public class ValidColumnSelectionTest
     );
     scalePanel.mousePressed(mouse);
     scalePanel.mouseDragged(mouse);
+
+    // simulate dragging selection leftwards beyond the sequences giving
+    // negative X
     mouse = new MouseEvent(scalePanel, 0, 1, 0, -30, 0, 1, false);
+
     scalePanel.mouseReleased(mouse);
 
     SequenceGroup sg = scalePanel.av.getSelectionGroup();