### Question:
OAuthRSJdbcRepository extends AbstractJdbcRepository implements OAuthRSRepository { @Override public AccessToken findAccessTokenByTokenId(String tokenId) { final String sql = " select * from oauth_access_token where token_id = ?"; final List<AccessToken> list = jdbcTemplate.query(sql, accessTokenRowMapper, tokenId); return list.isEmpty() ? null : list.get(0); }  @Override AccessToken findAccessTokenByTokenId(String tokenId); @Override ClientDetails findClientDetailsByClientIdAndResourceIds(String clientId, String resourceIds);  }### Answer:
@Test public void findAccessTokenByTokenId() throws Exception { String tokenId = GuidGenerator.generate(); final AccessToken accessToken = oauthJdbcRepository.findAccessTokenByTokenId(tokenId); assertNull(accessToken); }