@Test
public void reference() {

  ContextURL contextURL = ContextURLParser.parse(URI.create("http://host/service/$metadata#Customers/$ref"));
  assertTrue(contextURL.isReference());
  assertNull(contextURL.getSelectList());
  assertNull(contextURL.getNavOrPropertyPath());
  assertFalse(contextURL.isEntity());
  assertFalse(contextURL.isDelta());
}