final Map<String, Object> map = new HashMap<String, Object>();
        map.put("data1", 1);
        assertFalse(docBoostMatcher.match(map));
    }

    @Test
    public void test_match_nonBooleanReturn() {
        final DocBoostMatcher docBoostMatcher = new DocBoostMatcher();
        docBoostMatcher.setMatchExpression("'string_value'");

        final Map<String, Object> map = new HashMap<String, Object>();