// [Issue#232]
 public void testBigDecimalAsPlainStringTreeConversion() throws Exception {
   ObjectMapper mapper = new ObjectMapper();
   mapper.enable(SerializationFeature.WRITE_BIGDECIMAL_AS_PLAIN);
   Map<String, Object> map = new HashMap<String, Object>();
   String PI_STR = "3.00000000";
   map.put("pi", new BigDecimal(PI_STR));
   JsonNode tree = mapper.valueToTree(map);
   assertNotNull(tree);
   assertEquals(1, tree.size());
   assertTrue(tree.has("pi"));
 }