virajjasani commented on a change in pull request #1999:
URL: https://github.com/apache/hbase/pull/1999#discussion_r447508191



##########
File path: 
hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestJSONBean.java
##########
@@ -0,0 +1,104 @@
+/**
+ *
+ * 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.hbase.util;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Matchers.eq;
+import static org.mockito.Mockito.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+import java.io.PrintWriter;
+import java.io.StringWriter;
+import java.util.HashSet;
+import java.util.Set;
+import javax.management.MBeanAttributeInfo;
+import javax.management.MBeanInfo;
+import javax.management.MBeanServer;
+import javax.management.ObjectName;
+import javax.management.QueryExp;
+import org.apache.hadoop.hbase.testclassification.SmallTests;
+import org.codehaus.jackson.map.ObjectMapper;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+
+/**
+ * Test {@link JSONBean}.
+ */
+@Category(SmallTests.class)
+public class TestJSONBean {
+  private MBeanServer getMockMBeanServer() throws Exception {
+    MBeanServer mbeanServer = mock(MBeanServer.class);
+    Set<ObjectName> names = new HashSet<>();
+    names.add(new ObjectName("test1:type=test2"));
+    when(mbeanServer.queryNames(any(ObjectName.class), 
any(QueryExp.class))).thenReturn(names);
+    MBeanInfo mbeanInfo = mock(MBeanInfo.class);
+    when(mbeanInfo.getClassName()).thenReturn("testClassName");
+    String[] attributeNames = new String[] {"intAttr", "nanAttr", "strAttr", 
"boolAttr"};
+    MBeanAttributeInfo[] attributeInfos = new 
MBeanAttributeInfo[attributeNames.length];
+    for (int i = 0; i < attributeInfos.length; i++) {
+      attributeInfos[i] = new MBeanAttributeInfo(attributeNames[i],
+        null,
+        null,
+        true,
+        false,
+        false);
+    }
+    when(mbeanInfo.getAttributes()).thenReturn(attributeInfos);
+    
when(mbeanServer.getMBeanInfo(any(ObjectName.class))).thenReturn(mbeanInfo);
+    when(mbeanServer.getAttribute(any(ObjectName.class), 
eq("intAttr"))).thenReturn(3);

Review comment:
       Oh yes, much better




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