public void testSimpleKeyDeser() throws Exception
{
ObjectMapper mapper = new ObjectMapper();
SimpleModule module = new SimpleModule("test", Version.unknownVersion());
module.addKeyDeserializer(String.class, new ContextualDeser("???"));
mapper.registerModule(module);
MapBean result = mapper.readValue("{\"map\":{\"a\":3}}", MapBean.class);
Map<String,Integer> map = result.map;
assertNotNull(map);
assertEquals(1, map.size());