@Test
	public void testSetSelectedValue_EmptyField() {

		setSelectedValue("d1");

		assertTextFieldText("d1");
		assertSelectedValue("d1");
	}
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