如何解决模拟类和接口
您好,到目前为止,我一直在尝试在测试中使用模仿。 这是我的问题:我可以模拟一个接口,以便实现该接口的每个类的行为都与模拟中描述的一样吗?
这是我正在测试的方法:
public static boolean initNewCluster(ServerConfiguration conf) throws Exception {
return runFunctionWithRegistrationManager(conf,rm -> {
try {
return rm.initNewCluster();
} catch (Exception e) {
System.out.println("MOCK WORKS!!! \n");
throw new UncheckedExecutionException(e.getMessage(),e);
}
});
}
我需要模拟调用rm.initNewCluster()。 现在,这是使用initNewCluster()作为方法的接口:
@LimitedPrivate
@Evolving
public interface RegistrationManager extends AutoCloseable {
/**
* 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;
这是实现此接口的类:
/**
* ZooKeeper Based {@link RegistrationManager}.
*/
@Slf4j
public class ZKRegistrationManager implements RegistrationManager {
private static final Function<Throwable,BKException> EXCEPTION_FUNC = cause -> {
if (cause instanceof BKException) {
log.error("Failed to get bookie list : ",cause);
return (BKException) cause;
} else if (cause instanceof InterruptedException) {
log.error("Interrupted reading bookie list : ",cause);
return new BKInterruptedException();
} else {
return new MetaStoreException();
}
};
private final ServerConfiguration conf;
private final ZooKeeper zk;
private final List<ACL> zkAcls;
private final LayoutManager layoutManager;
private volatile boolean zkRegManagerInitialized = false;
// ledgers root path
private final String ledgersRootPath;
// cookie path
private final String cookiePath;
// registration paths
protected final String bookieRegistrationPath;
protected final String bookieReadonlyRegistrationPath;
// session timeout in milliseconds
private final int zkTimeoutMs;
public ZKRegistrationManager(ServerConfiguration conf,ZooKeeper zk,RegistrationListener listener) {
this(conf,zk,ZKMetadataDriverBase.resolveZkLedgersRootPath(conf),listener);
}
public ZKRegistrationManager(ServerConfiguration conf,String ledgersRootPath,RegistrationListener listener) {
this.conf = conf;
this.zk = zk;
this.zkAcls = ZkUtils.getACLs(conf);
this.ledgersRootPath = ledgersRootPath;
this.cookiePath = ledgersRootPath + "/" + COOKIE_NODE;
this.bookieRegistrationPath = ledgersRootPath + "/" + AVAILABLE_NODE;
this.bookieReadonlyRegistrationPath = this.bookieRegistrationPath + "/" + READONLY;
this.zkTimeoutMs = conf.getZkTimeout();
this.layoutManager = new ZkLayoutManager(
zk,ledgersRootPath,zkAcls);
this.zk.register(event -> {
if (!zkRegManagerInitialized) {
// do nothing until first registration
return;
}
// Check for expired connection.
if (event.getType().equals(EventType.None)
&& event.getState().equals(KeeperState.Expired)) {
listener.onRegistrationExpired();
}
});
}
.
.
.
.
.
.
@Override
public boolean initNewCluster() throws Exception {
System.out.println("I have been called ! \n");
String zkServers = ZKMetadataDriverBase.resolveZkServers(conf);
String instanceIdPath = ledgersRootPath + "/" + INSTANCEID;
log.info("Initializing ZooKeeper metadata for new cluster,ZKServers: {} ledger root path: {}",zkServers,ledgersRootPath);
boolean ledgerRootExists = null != zk.exists(ledgersRootPath,false);
if (ledgerRootExists) {
log.error("Ledger root path: {} already exists",ledgersRootPath);
return false;
}
List<Op> multiOps = Lists.newArrayListWithExpectedSize(4);
// Create ledgers root node
multiOps.add(Op.create(ledgersRootPath,EMPTY_BYTE_ARRAY,zkAcls,CreateMode.PERSISTENT));
// create available bookies node
multiOps.add(Op.create(bookieRegistrationPath,CreateMode.PERSISTENT));
// create readonly bookies node
multiOps.add(Op.create(
bookieReadonlyRegistrationPath,CreateMode.PERSISTENT));
// create INSTANCEID
String instanceId = UUID.randomUUID().toString();
multiOps.add(Op.create(instanceIdPath,instanceId.getBytes(UTF_8),CreateMode.PERSISTENT));
// execute the multi ops
zk.multi(multiOps);
// creates the new layout and stores in zookeeper
AbstractZkLedgerManagerFactory.newLedgerManagerFactory(conf,layoutManager);
log.info("Successfully initiated cluster. ZKServers: {} ledger root path: {} instanceId: {}",instanceId);
return true;
}
}
这是我的考试课:
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" },"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"){
this.conf = new ServerConfiguration(baseConf);
String ledgersRootPath = "/testledgers";
this.conf.setMetadataServiceUri(newMetadataServiceUri(ledgersRootPath));
when(mockedRM.initNewCluster()).thenThrow(new Exception());
}
try {
realResult = BookKeeperAdmin.initNewCluster(conf);
} catch (Exception e) {
realResult = false ;
e.printStackTrace();
}
assertEquals(result,realResult);
}
}`
问题是当BookKeeperAdmin.initNewCluster(conf)被调用时,它导致实现方法initNewCluster()的调用,而不是我嘲笑的那个! 希望大家能帮忙,大家好!
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