@Test public void testGet() throws Exception { FieldMapperGetterWithConverter<String, Long, Integer> g = new FieldMapperGetterWithConverter<String, Long, Integer>( new ContextualConverter<Long, Integer>() { @Override public Integer convert(Long in, Context context) throws Exception { return 25; } }, new ContextualGetter<String, Long>() { @Override public Long get(String s, Context context) throws Exception { return 3l; } } ); assertEquals(new Integer(25), g.get(null, null)); } }