@Test(expected = MapperException.class)
public void testUnknownCurrency() throws SchemaException, MapperException {

    LOG.info("testUnknownCurrency");
    final MapperRegistry registry = new MapperRegistry();
    registry.register(new CurrencyMapper());
    final CurrencyMapper mapper = registry.getMapper(CurrencyMapper.class);
    final String n = "NON_EXISTENT_CURRENCY";
    mapper.fromDb(n);
}