package com.baeldung.web3j.services; import org.junit.After; import org.junit.Before; import org.junit.Test; import java.util.concurrent.CompletableFuture; public class EthereumContractUnitTest { private Web3Service web3Service; @Before public void setup() { web3Service = new Web3Service(); } @Test public void testContract() { CompletableFuture result = web3Service.fromScratchContractExample(); assert (result instanceof CompletableFuture); } @Test public void sendTx() { CompletableFuture result = web3Service.sendTx(); assert (result instanceof CompletableFuture); } @After public void cleanup() { } }