@Test
    public void testNaming() throws ParseException {
        RankingExpression test = new RankingExpression("a+b");
        test.setName("test");
        assertEquals("test: a + b", test.toString());
    }
@author Simon Thoresen Hult
@author bratseth
searchlib/src/test/java/com/yahoo/searchlib/rankingexpression/RankingExpressionTestCase.java