Add test cases on StatisticsCollectJobWorker

kernel/schedule/core/src/main/java/org/apache/shardingsphere/schedule/core/job/statistics/collect/StatisticsCollectJobWorker.java

@@ -54,15 +54,16 @@ public final class StatisticsCollectJobWorker {
      * Initialize job worker.
      */
     public void initialize() {
-        if (WORKER_INITIALIZED.compareAndSet(false, true)) {
-            ModeConfiguration modeConfig = contextManager.getComputeNodeInstanceContext().getModeConfiguration();
-            if ("ZooKeeper".equals(modeConfig.getRepository().getType())) {
-                scheduleJobBootstrap = new ScheduleJobBootstrap(createRegistryCenter(modeConfig), new StatisticsCollectJob(contextManager), createJobConfiguration());
-                scheduleJobBootstrap.schedule();
-                return;
-            }
+        if (!WORKER_INITIALIZED.compareAndSet(false, true)) {
+            return;
+        }
+        ModeConfiguration modeConfig = contextManager.getComputeNodeInstanceContext().getModeConfiguration();
+        if (!"ZooKeeper".equals(modeConfig.getRepository().getType())) {
             log.warn("Can not collect statistics because of unsupported cluster type: {}", modeConfig.getRepository().getType());
+            return;
         }
+        scheduleJobBootstrap = new ScheduleJobBootstrap(createRegistryCenter(modeConfig), new StatisticsCollectJob(contextManager), createJobConfiguration());
+        scheduleJobBootstrap.schedule();
     }
 
     private CoordinatorRegistryCenter createRegistryCenter(final ModeConfiguration modeConfig) {

kernel/schedule/core/src/test/java/org/apache/shardingsphere/schedule/core/job/statistics/collect/StatisticsCollectJobWorkerTest.java

@@ -0,0 +1,71 @@
+/*
+ * 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.schedule.core.job.statistics.collect;
+
+import lombok.SneakyThrows;
+import org.apache.shardingsphere.elasticjob.lite.api.bootstrap.impl.ScheduleJobBootstrap;
+import org.apache.shardingsphere.mode.manager.ContextManager;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.Answers;
+import org.mockito.Mock;
+import org.mockito.internal.configuration.plugins.Plugins;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.mockito.Mockito.verify;
+
+@ExtendWith(MockitoExtension.class)
+class StatisticsCollectJobWorkerTest {
+
+    private StatisticsCollectJobWorker jobWorker;
+
+    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
+    private ContextManager contextManager;
+
+    @BeforeEach
+    void setUp() {
+        jobWorker = new StatisticsCollectJobWorker(contextManager);
+    }
+
+    @Test
+    void assertInitializeTwice() {
+        jobWorker.initialize();
+        jobWorker.initialize();
+        verify(contextManager.getComputeNodeInstanceContext()).getModeConfiguration();
+    }
+
+    @Test
+    void assertInitializeWithNotZooKeeperRepository() {
+        jobWorker.initialize();
+        assertNull(getScheduleJobBootstrap());
+    }
+
+    @Test
+    void assertDestroy() {
+        jobWorker.destroy();
+        jobWorker.destroy();
+        assertNull(getScheduleJobBootstrap());
+    }
+
+    @SneakyThrows(ReflectiveOperationException.class)
+    private ScheduleJobBootstrap getScheduleJobBootstrap() {
+        return (ScheduleJobBootstrap) Plugins.getMemberAccessor().get(StatisticsCollectJobWorker.class.getDeclaredField("scheduleJobBootstrap"), StatisticsCollectJobWorker.class);
+    }
+}