HDDS-164. Add unit test for HddsDatanodeService. Contributed by Yiqun Lin.

hadoop-hdds/container-service/src/test/java/org/apache/hadoop/ozone/TestHddsDatanodeService.java

@@ -0,0 +1,95 @@
+/**
+ * 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.hadoop.ozone;
+
+import static org.apache.hadoop.ozone.OzoneConfigKeys.OZONE_ENABLED;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+
+import java.io.File;
+import java.io.IOException;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FileUtil;
+import org.apache.hadoop.hdds.HddsConfigKeys;
+import org.apache.hadoop.hdds.conf.OzoneConfiguration;
+import org.apache.hadoop.hdfs.DFSConfigKeys;
+import org.apache.hadoop.test.GenericTestUtils;
+import org.apache.hadoop.util.ServicePlugin;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+/**
+ * Test class for {@link HddsDatanodeService}.
+ */
+public class TestHddsDatanodeService {
+  private File testDir;
+  private Configuration conf;
+  private HddsDatanodeService service;
+
+  @Before
+  public void setUp() {
+    testDir = GenericTestUtils.getRandomizedTestDir();
+    conf = new OzoneConfiguration();
+    conf.setBoolean(OZONE_ENABLED, true);
+    conf.set(HddsConfigKeys.OZONE_METADATA_DIRS, testDir.getPath());
+    conf.setClass(OzoneConfigKeys.HDDS_DATANODE_PLUGINS_KEY, MockService.class,
+        ServicePlugin.class);
+
+    String volumeDir = testDir + "/disk1";
+    conf.set(DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY, volumeDir);
+  }
+
+  @After
+  public void tearDown() {
+    FileUtil.fullyDelete(testDir);
+  }
+
+  @Test
+  public void testStartup() throws IOException {
+    service = HddsDatanodeService.createHddsDatanodeService(conf);
+    service.start(null);
+    service.join();
+
+    assertNotNull(service.getDatanodeDetails());
+    assertNotNull(service.getDatanodeDetails().getHostName());
+    assertFalse(service.getDatanodeStateMachine().isDaemonStopped());
+
+    service.stop();
+    service.close();
+  }
+
+  static class MockService implements ServicePlugin {
+
+    @Override
+    public void close() throws IOException {
+      // Do nothing
+    }
+
+    @Override
+    public void start(Object arg0) {
+      // Do nothing
+    }
+
+    @Override
+    public void stop() {
+      // Do nothing
+    }
+  }
+}