undo doesn't suffer from autopopup intervention, again

java/java-tests/testSrc/com/intellij/codeInsight/completion/JavaAutoPopupTest.groovy

@@ -873,5 +873,14 @@ class LiveComplete {
     assert myFixture.editor.document.text.contains('ArrStoExce.')
   }
 
+  public void testAutopopupTypingUndo() {
+    myFixture.configureByText "a.java", "class Foo {{ <caret> }}"
+    def editor;
+    edt { editor = FileEditorManager.getInstance(project).openFile(myFixture.file.virtualFile, false)[0] }
+    type 'aioobeeee'
+    edt { UndoManager.getInstance(project).undo(editor) }
+    assert !myFixture.editor.document.text.contains('aioo')
+  }
+
 
 }