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HBASE-24657 add unit test for JSONBean.java 

Closes #2004

Signed-off-by: Viraj Jasani <vjasani@apache.org>
This commit is contained in:
David Manning 2020-07-02 18:42:44 +05:30 committed by Viraj Jasani
parent afe2eac7b6
commit e614b89c33
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hbase-http/src/test/java/org/apache/hadoop/hbase/util/TestJSONBean.java Normal file
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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.hadoop.hbase.util;
import static org.junit.Assert.assertEquals;
import static org.mockito.ArgumentMatchers.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.lang.reflect.Type;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import javax.management.MBeanAttributeInfo;
import javax.management.MBeanInfo;
import javax.management.MBeanServer;
import javax.management.ObjectName;
import org.apache.hadoop.hbase.HBaseClassTestRule;
import org.apache.hadoop.hbase.testclassification.MiscTests;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.junit.ClassRule;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.apache.hbase.thirdparty.com.google.common.reflect.TypeToken;
import org.apache.hbase.thirdparty.com.google.gson.Gson;
/**
* Test {@link JSONBean}.
*/
@Category({MiscTests.class, SmallTests.class})
public class TestJSONBean {
@ClassRule
public static final HBaseClassTestRule CLASS_RULE =
HBaseClassTestRule.forClass(TestJSONBean.class);
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(), any())).thenReturn(names);
MBeanInfo mbeanInfo = mock(MBeanInfo.class);
when(mbeanInfo.getClassName()).thenReturn("testClassName");
String[] attributeNames = new String[] {"intAttr", "nanAttr", "infinityAttr",
"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())).thenReturn(mbeanInfo);
when(mbeanServer.getAttribute(any(), eq("intAttr"))).thenReturn(3);
when(mbeanServer.getAttribute(any(), eq("nanAttr"))).thenReturn(Double.NaN);
when(mbeanServer.getAttribute(any(), eq("infinityAttr"))).
thenReturn(Double.POSITIVE_INFINITY);
when(mbeanServer.getAttribute(any(), eq("strAttr"))).thenReturn("aString");
when(mbeanServer.getAttribute(any(), eq("boolAttr"))).thenReturn(true);
return mbeanServer;
}
private String getExpectedJSON() {
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
pw.println("{");
pw.println(" \"beans\": [");
pw.println(" {");
pw.println(" \"name\": \"test1:type=test2\",");
pw.println(" \"modelerType\": \"testClassName\",");
pw.println(" \"intAttr\": 3,");
pw.println(" \"nanAttr\": \"NaN\",");
pw.println(" \"infinityAttr\": \"Infinity\",");
pw.println(" \"strAttr\": \"aString\",");
pw.println(" \"boolAttr\": true");
pw.println(" }");
pw.println(" ]");
pw.print("}");
return sw.toString();
}
@Test
public void testJSONBeanValueTypes() throws Exception {
JSONBean bean = new JSONBean();
StringWriter stringWriter = new StringWriter();
try (
PrintWriter printWriter = new PrintWriter(stringWriter);
JSONBean.Writer jsonWriter = bean.open(printWriter)) {
jsonWriter.write(getMockMBeanServer(), null, null, false);
}
final Gson gson = GsonUtil.createGson().create();
Type typeOfHashMap = new TypeToken<Map<String, Object>>() {}.getType();
Map<String, Object> expectedJson = gson.fromJson(getExpectedJSON(), typeOfHashMap);
Map<String, Object> actualJson = gson.fromJson(stringWriter.toString(), typeOfHashMap);
assertEquals(expectedJson, actualJson);
}
}