@Test
public void testEthNewFilter() throws Exception {

    EthFilter ethFilter = new EthFilter()
            .addSingleTopic("0x12341234");
    web3j.ethNewFilter(ethFilter).send();
    verifyResult("{\"jsonrpc\":\"2.0\",\"method\":\"eth_newFilter\","
            + "\"params\":[{\"topics\":[\"0x12341234\"]}],\"id\":1}");
}