// Tests for parseSource with complete data
    // ============================================================

    @Test
    public void test_parseSource_completeData() {
        Map<String, Object> source = new HashMap<>();
        source.put(FieldNames.TEXT, "test");
        source.put(FieldNames.QUERY_FREQ, 100L);
        source.put(FieldNames.DOC_FREQ, 50L);