@Test
	public void testEnterKey_MatchingWindowClosed_EnterKeyDisabled() {

		//
		// By default, the ENTER key will trigger an editingStopped() notification when the 
		// matching list is not showing.  When we disable the ENTER key listener, we should
		// not get any events.
		//
		runSwing(() -> textField.setIgnoreEnterKeyPress(true));

		// insert some text and make sure the window is created
		typeText("d", true);
		closeMatchingWindow();

		// press the 'Enter' key; the window does not go away
		enter();
		assertNoEditingStoppedEvent();
		assertMatchingWindowHidden();
		assetNoListSelection();
	}
This test achieves partial coverage of {@link DropDownTextField}.  Further coverage is
provided by {@link DropDownSelectionTextFieldTest}, as that test enables item selection 
in the widget being tested.
Ghidra/Framework/Docking/src/test/java/docking/widgets/DropDownTextFieldTest.java