@Test
    void testDefaultLabelMatching() throws IOException, ParseException {
        assertSemantics("matched:term", "term");
        assertSemantics("alabel:term", "alabel:term");

        assertSemantics("AND term2 hit", "term2");
        assertSemantics("alabel:term2", "alabel:term2");
    }
Tests that matching with no label matches the default label (index) only
container-search/src/test/java/com/yahoo/prelude/semantics/test/LabelMatchingTestCase.java