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在一次大学考试中,我被要求测试一些 apache 簿记员类/方法,在这样做的过程中,我想在我的参数化测试中使用 mockito。没有 mockito 的测试工作正常但是当我尝试模拟接口(interface)时我得到这个错误:
org.mockito.exceptions.base.MockitoException:
Mockito cannot mock this class: interface org.apache.bookkeeper.discover.RegistrationManager.
Mockito can only mock non-private & non-final classes.
If you're not sure why you're getting this error, please report to the mailing list.
Java : 11
JVM vendor name : Ubuntu
JVM vendor version : 11.0.8+10-post-Ubuntu-0ubuntu118.04.1
JVM name : OpenJDK 64-Bit Server VM
JVM version : 11.0.8+10-post-Ubuntu-0ubuntu118.04.1
JVM info : mixed mode, sharing
OS name : Linux
OS version : 4.15.0-112-generic
Underlying exception : java.lang.IllegalArgumentException: Could not create type
at org.apache.bookkeeper.client.BookKeeperAdminInitNewClusterTest.<init>(BookKeeperAdminInitNewClusterTest.java:40)
at org.junit.runners.parameterized.BlockJUnit4ClassRunnerWithParameters.createTestUsingConstructorInjection(BlockJUnit4ClassRunnerWithParameters.java:43)
at org.junit.runners.parameterized.BlockJUnit4ClassRunnerWithParameters.createTest(BlockJUnit4ClassRunnerWithParameters.java:38)
at org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(BlockJUnit4ClassRunner.java:266)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:263)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runners.Suite.runChild(Suite.java:128)
at org.junit.runners.Suite.runChild(Suite.java:27)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:220)
at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:53)
Caused by: java.lang.IllegalArgumentException: Could not create type
at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:154)
at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:365)
at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:174)
at net.bytebuddy.TypeCache$WithInlineExpunction.findOrInsert(TypeCache.java:376)
at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator.mockClass(TypeCachingBytecodeGenerator.java:32)
at org.mockito.internal.creation.bytebuddy.SubclassByteBuddyMockMaker.createMockType(SubclassByteBuddyMockMaker.java:71)
at org.mockito.internal.creation.bytebuddy.SubclassByteBuddyMockMaker.createMock(SubclassByteBuddyMockMaker.java:42)
at org.mockito.internal.creation.bytebuddy.ByteBuddyMockMaker.createMock(ByteBuddyMockMaker.java:25)
at org.powermock.api.mockito.mockmaker.PowerMockMaker.createMock(PowerMockMaker.java:41)
at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:35)
at org.mockito.internal.MockitoCore.mock(MockitoCore.java:62)
at org.mockito.Mockito.mock(Mockito.java:1908)
at org.mockito.Mockito.mock(Mockito.java:1817)
at org.apache.bookkeeper.client.BookKeeperAdminInitNewClusterTest.<init>(BookKeeperAdminInitNewClusterTest.java:40)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
... 26 more
Caused by: java.lang.NoSuchMethodError: 'net.bytebuddy.dynamic.loading.MultipleParentClassLoader$Builder net.bytebuddy.dynamic.loading.MultipleParentClassLoader$Builder.appendMostSpecific(java.util.Collection)'
at org.mockito.internal.creation.bytebuddy.SubclassBytecodeGenerator.mockClass(SubclassBytecodeGenerator.java:83)
at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator$1.call(TypeCachingBytecodeGenerator.java:37)
at org.mockito.internal.creation.bytebuddy.TypeCachingBytecodeGenerator$1.call(TypeCachingBytecodeGenerator.java:34)
at net.bytebuddy.TypeCache.findOrInsert(TypeCache.java:152)
... 43 more
这里是我写的测试类:
package org.apache.bookkeeper.client;
import org.apache.bookkeeper.conf.ServerConfiguration;
import org.apache.bookkeeper.discover.RegistrationManager;
import org.apache.bookkeeper.discover.ZKRegistrationManager;
import org.apache.bookkeeper.meta.LayoutManager;
import org.apache.bookkeeper.test.BookKeeperClusterTestCase;
import org.apache.bookkeeper.test.ZooKeeperCluster;
import org.apache.bookkeeper.test.ZooKeeperUtil;
import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.data.ACL;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import static org.junit.Assert.assertEquals;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
@RunWith(value= Parameterized.class)
public class BookKeeperAdminInitNewClusterTest extends BookKeeperClusterTestCase {
private boolean result;
private ServerConfiguration conf;
private String confType ;
private static final int numOfBookies = 2;
private final int lostBookieRecoveryDelayInitValue = 1800;
@Mock
RegistrationManager mockedRM = mock(RegistrationManager.class) ;
@Parameterized.Parameters
public static Collection<Object[]> getTestParameters(){
return Arrays.asList(new Object[][]{
//last parameter states if the method rm.initNewCluster() called inside
// BookKeeperAdmin.initNewCluster(conf) must be mocked or not
{true , "new" },
{false , "null" },
{false , "wrong"},
{false , "mock"}, //caso di test introdotto per portare la branch coverage al 100%
// entrando nella clausola catch del metodo initNewCluste()
});
}
public BookKeeperAdminInitNewClusterTest(boolean result , String conf) throws Exception {
super(numOfBookies, 480);
baseConf.setLostBookieRecoveryDelay(lostBookieRecoveryDelayInitValue);
baseConf.setOpenLedgerRereplicationGracePeriod(String.valueOf(30000));
setAutoRecoveryEnabled(true);
this.result = result;
this.confType = conf;
}
@Test
public void testInitNewCluster() throws Exception {
boolean realResult ;
if(confType == "null"){
this.conf = null;
}else if( confType == "wrong"){
this.conf = new ServerConfiguration().setMetadataServiceUri("zk+hierarchical://127.0.0.1/ledgers");
}else if(confType == "new") {
this.conf = new ServerConfiguration(baseConf);
String ledgersRootPath = "/testledgers";
this.conf.setMetadataServiceUri(newMetadataServiceUri(ledgersRootPath));
}else if(confType == "mock"){
when(mockedRM.initNewCluster()).thenThrow(new Exception());
}
try {
realResult = BookKeeperAdmin.initNewCluster(conf);
} catch (Exception e) {
realResult = false ;
e.printStackTrace();
}
assertEquals(result,realResult);
}
}
这里是我试图模拟的界面:
/*
* 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.bookkeeper.discover;
import org.apache.bookkeeper.bookie.BookieException;
import org.apache.bookkeeper.common.annotation.InterfaceAudience.LimitedPrivate;
import org.apache.bookkeeper.common.annotation.InterfaceStability.Evolving;
import org.apache.bookkeeper.versioning.Version;
import org.apache.bookkeeper.versioning.Versioned;
/**
* Registration manager interface, which a bookie server will use to do the registration process.
*/
@LimitedPrivate
@Evolving
public interface RegistrationManager extends AutoCloseable {
/**
* Registration Listener on listening the registration state.
*/
@FunctionalInterface
interface RegistrationListener {
/**
* Signal when registration is expired.
*/
void onRegistrationExpired();
}
@Override
void close();
/**
* Return the cluster instance id.
*
* @return the cluster instance id.
*/
String getClusterInstanceId() throws BookieException;
/**
* Registering the bookie server as <i>bookieId</i>.
*
* @param bookieId bookie id
* @param readOnly whether to register it as writable or readonly
* @param serviceInfo information about services exposed by the Bookie
* @throws BookieException when fail to register a bookie.
*/
void registerBookie(String bookieId, boolean readOnly, BookieServiceInfo serviceInfo) throws BookieException;
/**
* Unregistering the bookie server as <i>bookieId</i>.
*
* @param bookieId bookie id
* @param readOnly whether to register it as writable or readonly
* @throws BookieException when fail to unregister a bookie.
*/
void unregisterBookie(String bookieId, boolean readOnly) throws BookieException;
/**
* Checks if Bookie with the given BookieId is registered as readwrite or
* readonly bookie.
*
* @param bookieId bookie id
* @return returns true if a bookie with bookieid is currently registered as
* readwrite or readonly bookie.
* @throws BookieException
*/
boolean isBookieRegistered(String bookieId) throws BookieException;
/**
* Write the cookie data, which will be used for verifying the integrity of the bookie environment.
*
* @param bookieId bookie id
* @param cookieData cookie data
* @throws BookieException when fail to write cookie
*/
void writeCookie(String bookieId, Versioned<byte[]> cookieData) throws BookieException;
/**
* Read the cookie data, which will be used for verifying the integrity of the bookie environment.
*
* @param bookieId bookie id
* @return versioned cookie data
* @throws BookieException when fail to read cookie
*/
Versioned<byte[]> readCookie(String bookieId) throws BookieException;
/**
* Remove the cookie data.
*
* @param bookieId bookie id
* @param version version of the cookie data
* @throws BookieException when fail to remove cookie
*/
void removeCookie(String bookieId, Version version) throws BookieException;
/**
* Prepare ledgers root node, availableNode, readonly node..
*
* @return Returns true if old data exists, false if not.
*/
boolean prepareFormat() throws Exception;
/**
* Initializes new cluster by creating required znodes for the cluster. If
* ledgersrootpath is already existing then it will error out.
*
* @return returns true if new cluster is successfully created or false if it failed to initialize.
* @throws Exception
*/
boolean initNewCluster() throws Exception;
/**
* Do format boolean.
*
* @return Returns true if success do format, false if not.
*/
boolean format() throws Exception;
/**
* Nukes existing cluster metadata.
*
* @return returns true if cluster metadata is successfully nuked
* or false if it failed to nuke the cluster metadata.
* @throws Exception
*/
boolean nukeExistingCluster() throws Exception;
}
2 个注意事项:
我使用的 Mockito 版本是 3.0.0字节好友版本为1.9.3
我希望你能帮助我,祝大家有个美好的一天:P
最佳答案
查看this bug report ,您可能遇到了 ByteBuddy 和 Mockito 的版本不兼容问题。
尝试将 Mockito 降级到 2.23 版或将 ByteBuddy 升级到 1.97 版。
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