add some tests for iexecHubService and remove unused import

src/test/java/com/iexec/core/chain/IexecHubServiceTests.java

@@ -0,0 +1,75 @@
+package com.iexec.core.chain;
+
+import com.iexec.commons.poco.chain.ChainTask;
+import com.iexec.commons.poco.chain.ChainTaskStatus;
+import com.iexec.commons.poco.contract.generated.IexecHubContract;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mock;
+import org.mockito.MockedStatic;
+import org.mockito.Mockito;
+import org.mockito.MockitoAnnotations;
+import org.web3j.crypto.Credentials;
+import org.web3j.crypto.Keys;
+import org.web3j.protocol.core.RemoteFunctionCall;
+import org.web3j.tx.TransactionManager;
+
+import java.math.BigInteger;
+import java.util.Optional;
+
+import static com.iexec.commons.poco.utils.TestUtils.CHAIN_TASK_ID;
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.*;
+
+public class IexecHubServiceTests {
+
+    @Mock
+    private CredentialsService credentialsService;
+
+    @Mock
+    private Web3jService web3jService;
+
+    @Mock
+    private ChainConfig chainConfig;
+
+    private IexecHubService iexecHubService;
+
+    @BeforeEach
+    void init() throws Exception {
+        MockitoAnnotations.openMocks(this);
+
+        final Credentials credentials = Credentials.create(Keys.createEcKeyPair());
+
+        when(credentialsService.getCredentials()).thenReturn(credentials);
+        when(web3jService.hasEnoughGas(any())).thenReturn(true);
+        when(chainConfig.getHubAddress()).thenReturn("0x748e091bf16048cb5103E0E10F9D5a8b7fBDd860");
+
+        try (MockedStatic<IexecHubContract> iexecHubContract = Mockito.mockStatic(IexecHubContract.class)) {
+            final IexecHubContract mockIexecContract = mock(IexecHubContract.class);
+            final RemoteFunctionCall<BigInteger> mockRemoteFunctionCall = mock(RemoteFunctionCall.class);
+            iexecHubContract.when(() -> IexecHubContract.load(any(), any(), (TransactionManager) any(), any()))
+                    .thenReturn(mockIexecContract);
+            when(mockIexecContract.contribution_deadline_ratio()).thenReturn(mockRemoteFunctionCall);
+            when(mockRemoteFunctionCall.send()).thenReturn(BigInteger.ONE);
+            iexecHubService = spy(new IexecHubService(credentialsService, web3jService, chainConfig));
+        }
+    }
+
+
+    @Test
+    void shouldTaskBeInCompletedStatusOnChain() {
+        final ChainTask task = ChainTask.builder().status(ChainTaskStatus.COMPLETED).build();
+        doReturn(Optional.of(task)).when(iexecHubService).getChainTask(CHAIN_TASK_ID);
+
+        assertThat(iexecHubService.isTaskInCompletedStatusOnChain(CHAIN_TASK_ID)).isTrue();
+    }
+
+    @Test
+    void shouldTaskNotBeInCompletedStatusOnChain() {
+        final ChainTask task = ChainTask.builder().status(ChainTaskStatus.REVEALING).build();
+        doReturn(Optional.of(task)).when(iexecHubService).getChainTask(CHAIN_TASK_ID);
+
+        assertThat(iexecHubService.isTaskInCompletedStatusOnChain(CHAIN_TASK_ID)).isFalse();
+    }
+}

src/test/java/com/iexec/core/replicate/ReplicateServiceTests.java

@@ -19,8 +19,6 @@
 import com.iexec.common.replicate.*;
 import com.iexec.commons.poco.chain.ChainContribution;
 import com.iexec.commons.poco.chain.ChainContributionStatus;
-import com.iexec.commons.poco.chain.ChainTask;
-import com.iexec.commons.poco.chain.ChainTaskStatus;
 import com.iexec.commons.poco.notification.TaskNotificationType;
 import com.iexec.commons.poco.task.TaskDescription;
 import com.iexec.commons.poco.utils.BytesUtils;