map.put("string", "789");

        assertEquals(Integer.valueOf(123), MapValueExtractor.getInteger(map, "int"));
        assertEquals(Integer.valueOf(456), MapValueExtractor.getInteger(map, "long"));
        assertEquals(Integer.valueOf(789), MapValueExtractor.getInteger(map, "string"));
        assertNull(MapValueExtractor.getInteger(map, "missing"));
    }

    @Test
    public void testGetDouble() {