assertFalse(queryFieldConfig.isFacetField("anyfield"));
        assertFalse(queryFieldConfig.isFacetField(""));
        assertFalse(queryFieldConfig.isFacetField(null));
    }

    public void test_setNotAnalyzedFields_withDuplicates() {
        String[] fields = { "field1", "field2", "field1", "field3", "field2" };
        queryFieldConfig.setNotAnalyzedFields(fields);

        // Set should contain unique values only