@Test
	public void testEnterKey_MatchingWindowOpen_DontConsumeEvent() {

		//
		// The default is to consume the event.  The test executes the code paths when the 
		// event is not to be consumed.
		//

		runSwing(() -> textField.setConsumeEnterKeyPress(false));

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

		// press the 'Enter' key; the window does will go away in this case, as we are not 
		// consuming the event--we assume the client will use the ENTER as a signal to grab
		// the text content, regardless of the fact that there is no selected item
		enter();
		assertMatchingWindowHidden();

	}
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