Add test cases on SessionConnectionReconnectListener (#32819)

mode/type/cluster/repository/provider/zookeeper/src/test/java/org/apache/shardingsphere/mode/repository/cluster/zookeeper/listener/SessionConnectionReconnectListenerTest.java

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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.shardingsphere.mode.repository.cluster.zookeeper.listener;
+
+import lombok.SneakyThrows;
+import org.apache.curator.framework.CuratorFramework;
+import org.apache.curator.framework.state.ConnectionState;
+import org.apache.shardingsphere.infra.instance.ComputeNodeInstanceContext;
+import org.apache.shardingsphere.mode.persist.service.ComputeNodePersistService;
+import org.apache.shardingsphere.mode.repository.cluster.ClusterPersistRepository;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.Answers;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import java.lang.reflect.Field;
+import java.util.Properties;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+@ExtendWith(MockitoExtension.class)
+class SessionConnectionReconnectListenerTest {
+
+    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
+    private ComputeNodeInstanceContext computeNodeInstanceContext;
+
+    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
+    private ClusterPersistRepository repository;
+
+    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
+    private CuratorFramework client;
+
+    @Test
+    void assertChangeToConnectedState() throws InterruptedException {
+        new SessionConnectionReconnectListener(computeNodeInstanceContext, repository).stateChanged(client, ConnectionState.CONNECTED);
+        verify(client.getZookeeperClient(), times(0)).blockUntilConnectedOrTimedOut();
+    }
+
+    @Test
+    void assertChangeToLostStateWithGenerateWorkerId() throws InterruptedException {
+        ComputeNodePersistService computeNodePersistService = mock(ComputeNodePersistService.class);
+        when(client.getZookeeperClient().blockUntilConnectedOrTimedOut()).thenReturn(false, true);
+        getSessionConnectionReconnectListener(computeNodePersistService).stateChanged(client, ConnectionState.LOST);
+        verify(computeNodeInstanceContext).generateWorkerId(new Properties());
+        verify(computeNodePersistService).registerOnline(any());
+    }
+
+    @Test
+    void assertChangeToLostStateWithoutGenerateWorkerId() throws InterruptedException {
+        ComputeNodePersistService computeNodePersistService = mock(ComputeNodePersistService.class);
+        when(client.getZookeeperClient().blockUntilConnectedOrTimedOut()).thenReturn(true);
+        when(computeNodeInstanceContext.getInstance().getWorkerId()).thenReturn(-1);
+        getSessionConnectionReconnectListener(computeNodePersistService).stateChanged(client, ConnectionState.LOST);
+        verify(computeNodeInstanceContext, times(0)).generateWorkerId(new Properties());
+        verify(computeNodePersistService).registerOnline(any());
+    }
+
+    @SneakyThrows(ReflectiveOperationException.class)
+    private SessionConnectionReconnectListener getSessionConnectionReconnectListener(final ComputeNodePersistService computeNodePersistService) {
+        SessionConnectionReconnectListener result = new SessionConnectionReconnectListener(computeNodeInstanceContext, repository);
+        Field field = result.getClass().getDeclaredField("computeNodePersistService");
+        field.setAccessible(true);
+        field.set(result, computeNodePersistService);
+        field.setAccessible(false);
+        return result;
+    }
+}