List<SuggestItem> items = null;
        final String[] tags = extractTags(tagFieldNames, tagFieldName -> getFieldValues(document, tagFieldName));
        final String[] roles = getFieldValues(document, roleFieldName);

        for (final String field : fields) {
            final Object textObj = document.get(field);
            if (textObj == null) {

    // ============================================================
    // Tests for getFieldValues edge cases
    // ============================================================

    @Test
    public void test_getFieldValues_nullDocument() throws Exception {
        Map<String, Object> document = new HashMap<>();
        String[] values = parser.getFieldValues(document, "nonexistent");

        document.put("int_field", 123);

        String[] stringValues = defaultContentsParser.getFieldValues(document, "string_field");
        assertEquals(1, stringValues.length);
        assertEquals("value1", stringValues[0]);

        String[] arrayValues = defaultContentsParser.getFieldValues(document, "string_array_field");
        assertEquals(2, arrayValues.length);
        assertEquals("value2", arrayValues[0]);