assertNotNull(kinds);
        assertEquals(1, kinds.length);
        assertEquals("query", kinds[0]);
    }

    @Test
    public void testParseSource() {
        // Test parseSource method
        Map<String, Object> source = new HashMap<>();
        source.put(FieldNames.TEXT, "parsed text");
        source.put(FieldNames.QUERY_FREQ, 75L);