org.mockito.Mockito.doReturn()方法的使用及代码示例

x33g5p2x  于2022-01-24 转载在 其他  
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本文整理了Java中org.mockito.Mockito.doReturn()方法的一些代码示例，展示了Mockito.doReturn()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Mockito.doReturn()方法的具体详情如下：
包路径：org.mockito.Mockito
类名称：Mockito
方法名：doReturn

Mockito.doReturn介绍

[英]Use doReturn() in those rare occasions when you cannot use Mockito#when(Object).

Beware that Mockito#when(Object) is always recommended for stubbing because it is argument type-safe and more readable (especially when stubbing consecutive calls).

Here are those rare occasions when doReturn() comes handy:

  1. When spying real objects and calling real methods on a spy brings side effects
List list = new LinkedList(); 
List spy = spy(list); 
//Impossible: real method is called so spy.get(0) throws IndexOutOfBoundsException (the list is yet empty) 
when(spy.get(0)).thenReturn("foo"); 
//You have to use doReturn() for stubbing: 
doReturn("foo").when(spy).get(0);
  1. Overriding a previous exception-stubbing:
when(mock.foo()).thenThrow(new RuntimeException()); 
//Impossible: the exception-stubbed foo() method is called so RuntimeException is thrown. 
when(mock.foo()).thenReturn("bar"); 
//You have to use doReturn() for stubbing: 
doReturn("bar").when(mock).foo();

Above scenarios shows a tradeoff of Mockito's elegant syntax. Note that the scenarios are very rare, though. Spying should be sporadic and overriding exception-stubbing is very rare. Not to mention that in general overridding stubbing is a potential code smell that points out too much stubbing.

See examples in javadoc for Mockito class
[中]在少数无法使用Mockito#when（Object）的情况下使用doReturn()。
请注意，Mockito#when（Object）总是建议用于存根，因为它是参数类型安全的，可读性更高（尤其是在存根连续调用时）。
以下是doReturn（）非常有用的情况：
1.在间谍中监视真实对象并调用真实方法时会产生副作用

List list = new LinkedList(); 
List spy = spy(list); 
//Impossible: real method is called so spy.get(0) throws IndexOutOfBoundsException (the list is yet empty) 
when(spy.get(0)).thenReturn("foo"); 
//You have to use doReturn() for stubbing: 
doReturn("foo").when(spy).get(0);

1.覆盖以前的异常存根：

when(mock.foo()).thenThrow(new RuntimeException()); 
//Impossible: the exception-stubbed foo() method is called so RuntimeException is thrown. 
when(mock.foo()).thenReturn("bar"); 
//You have to use doReturn() for stubbing: 
doReturn("bar").when(mock).foo();

以上场景显示了Mockito优雅语法的折衷。但请注意，这种情况非常罕见。间谍活动应该是零星的，覆盖异常存根非常罕见。更不用说，通常重写存根是一种潜在的代码气味，指出了太多的存根。
有关Mockito类，请参见javadoc中的示例

代码示例

代码示例来源：origin: Netflix/zuul

@Before
public void before() throws Exception
{
  MockitoAnnotations.initMocks(this);
  loader = spy(new FilterLoader(registry, compiler, filterFactory));
  doReturn(TestZuulFilter.class).when(compiler).compile(file);
  when(file.getAbsolutePath()).thenReturn("/filters/in/SomeFilter.groovy");
}

代码示例来源：origin: google/guava

@Override
 public T apply(Object delegate) {
  T mock = mock(forwarderClass, CALLS_REAL_METHODS.get());
  try {
   T stubber = doReturn(delegate).when(mock);
   DELEGATE_METHOD.invoke(stubber);
  } catch (Exception e) {
   throw new RuntimeException(e);
  }
  return mock;
 }
});

代码示例来源：origin: Netflix/zuul

@Test
    public void testGetFilterFromString() throws Exception {
      String string = "";
      doReturn(TestZuulFilter.class).when(compiler).compile(string, string);
      ZuulFilter filter = loader.getFilter(string, string);

      assertNotNull(filter);
      assertTrue(filter.getClass() == TestZuulFilter.class);
//            assertTrue(loader.filterInstanceMapSize() == 1);
    }

代码示例来源：origin: neo4j/neo4j

@Test
public void testNotifyListener() throws Exception
{
  doReturn( false, true ).when( monitor ).isStopped();
  monitor.monitor();
  verify( listener ).accept( any(VmPauseInfo.class) );
}

代码示例来源：origin: neo4j/neo4j

@Before
public void setUp()
{
  doReturn( jobHandle ).when( jobScheduler ).schedule( any( Group.class ), any( Runnable.class ) );
}

代码示例来源：origin: Alluxio/alluxio

@Test
public void sampleSingle() {
 setupLogger(10 * Constants.SECOND_MS);
 doReturn(true).when(mBaseLogger).isWarnEnabled();
 for (int i = 0; i < 10; i++) {
  mSamplingLogger.warn("warning");
 }
 verify(mBaseLogger, times(1)).warn("warning");
}

代码示例来源：origin: Netflix/zuul

@Test
    public void testGetFilterFromString() throws Exception {
      String string = "";
      doReturn(TestZuulFilter.class).when(compiler).compile(string, string);
      ZuulFilter filter = loader.getFilter(string, string);

      assertNotNull(filter);
      assertTrue(filter.getClass() == TestZuulFilter.class);
//            assertTrue(loader.filterInstanceMapSize() == 1);
    }

代码示例来源：origin: square/picasso

static Context mockPackageResourceContext() {
 Context context = mock(Context.class);
 PackageManager pm = mock(PackageManager.class);
 Resources res = mock(Resources.class);
 doReturn(pm).when(context).getPackageManager();
 try {
  doReturn(res).when(pm).getResourcesForApplication(RESOURCE_PACKAGE);
 } catch (PackageManager.NameNotFoundException e) {
  throw new RuntimeException(e);
 }
 doReturn(RESOURCE_ID_1).when(res).getIdentifier(RESOURCE_NAME, RESOURCE_TYPE, RESOURCE_PACKAGE);
 return context;
}

代码示例来源：origin: Netflix/zuul

@Before
public void before() throws Exception
{
  MockitoAnnotations.initMocks(this);
  loader = spy(new FilterLoader(registry, compiler, filterFactory));
  doReturn(TestZuulFilter.class).when(compiler).compile(file);
  when(file.getAbsolutePath()).thenReturn("/filters/in/SomeFilter.groovy");
}

代码示例来源：origin: Netflix/eureka

@Override
@Before
public void setUp() throws Exception {
  super.setUp();
  doReturn(10).when(serverConfig).getWaitTimeInMsWhenSyncEmpty();
  doReturn(1).when(serverConfig).getRegistrySyncRetries();
  doReturn(1l).when(serverConfig).getRegistrySyncRetryWaitMs();
  registry.syncUp();
}

代码示例来源：origin: pentaho/pentaho-kettle

@Test
public void testProcessRow_StreamIsNull() throws Exception {
 PGBulkLoader pgBulkLoaderStreamIsNull = mock( PGBulkLoader.class );
 doReturn( null ).when( pgBulkLoaderStreamIsNull ).getRow();
 PGBulkLoaderMeta meta = mock( PGBulkLoaderMeta.class );
 PGBulkLoaderData data = mock( PGBulkLoaderData.class );
 assertEquals( false, pgBulkLoaderStreamIsNull.processRow( meta, data ) );
}

代码示例来源：origin: apache/storm

@Test(expected = KeyNotFoundException.class)
public void testKeyNotFoundException() throws Exception {
  Map<String, Object> conf = Utils.readStormConfig();
  String key1 = "key1";
  conf.put(Config.STORM_LOCAL_DIR, "target");
  LocalFsBlobStore bs = new LocalFsBlobStore();
  LocalFsBlobStore spy = spy(bs);
  Mockito.doReturn(true).when(spy).checkForBlobOrDownload(key1);
  Mockito.doNothing().when(spy).checkForBlobUpdate(key1);
  spy.prepare(conf, null, null, null);
  spy.getBlob(key1, null);
}

代码示例来源：origin: neo4j/neo4j

ReadableTransactionState build()
  {
    final ReadableTransactionState mock = Mockito.mock( ReadableTransactionState.class );
    doReturn( new UnmodifiableMap<>( updates ) ).when( mock ).getIndexUpdates( any( SchemaDescriptor.class ) );
    final TreeMap<ValueTuple, MutableLongDiffSetsImpl> sortedMap = new TreeMap<>( ValueTuple.COMPARATOR );
    sortedMap.putAll( updates );
    doReturn( sortedMap ).when( mock ).getSortedIndexUpdates( any( SchemaDescriptor.class ) );
    return mock;
  }
}

代码示例来源：origin: Alluxio/alluxio

@Test
public void sampleMultiple() {
 setupLogger(10 * Constants.SECOND_MS);
 doReturn(true).when(mBaseLogger).isWarnEnabled();
 for (int i = 0; i < 10; i++) {
  mSamplingLogger.warn("warning1");
  mSamplingLogger.warn("warning2");
 }
 verify(mBaseLogger, times(1)).warn("warning1");
 verify(mBaseLogger, times(1)).warn("warning2");
}

代码示例来源：origin: gocd/gocd

@Test
public void shouldGetCurrentLogDirectoryByLookingAtFileAppenderOfRootLogger() throws Exception {
  if (WINDOWS.satisfy()) {
    return;
  }
  FileAppender fileAppender = new FileAppender();
  fileAppender.setFile("/var/log/go-server/go-server.log");
  DefaultPluginLoggingService service = Mockito.spy(new DefaultPluginLoggingService(systemEnvironment));
  doReturn(fileAppender).when(service).getGoServerLogFileAppender();
  String currentLogDirectory = service.getCurrentLogDirectory();
  assertThat(currentLogDirectory, is("/var/log/go-server"));
}

代码示例来源：origin: apache/hbase

@Test
public void testRequestQuoterWithNull() throws Exception {
 HttpServletRequest request = Mockito.mock(HttpServletRequest.class);
 Mockito.doReturn(null).when(request).getParameterValues("dummy");
 RequestQuoter requestQuoter = new RequestQuoter(request);
 String[] parameterValues = requestQuoter.getParameterValues("dummy");
 Assert.assertEquals("It should return null "
   + "when there are no values for the parameter", null, parameterValues);
}

代码示例来源：origin: pentaho/pentaho-kettle

@Test
public void testWriteFile() throws Exception {
 String path = getClass().getResource( "repositories.xml" ).getPath().replace( "repositories.xml", "new-repositories.xml" );
 doReturn( path ).when( repoMeta ).getKettleUserRepositoriesFile();
 repoMeta.writeData();
 InputStream resourceAsStream = getClass().getResourceAsStream( "new-repositories.xml" );
 assertEquals(
  "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" + Const.CR
   + "<repositories>" + Const.CR
   + "  </repositories>" + Const.CR, IOUtils.toString( resourceAsStream ) );
 new File( path ).delete();
}

代码示例来源：origin: pentaho/pentaho-kettle

@Test
public void getLocationFrom() {
 HttpPost postMethod = mock( HttpPost.class );
 Header locationHeader = new BasicHeader( LOCATION_HEADER, TEST_URL );
 doReturn( locationHeader ).when( postMethod ).getFirstHeader( LOCATION_HEADER );
 assertEquals( TEST_URL, WebService.getLocationFrom( postMethod ) );
}

代码示例来源：origin: pentaho/pentaho-kettle

@Test
public void testNewTransformationsWithContainerObjectId() throws Exception {
 TransMeta meta = mock( TransMeta.class );
 doReturn( new String[] { "X", "Y", "Z" } ).when( meta ).listVariables();
 doReturn( new String[] { "A", "B", "C" } ).when( meta ).listParameters();
 doReturn( "XYZ" ).when( meta ).getVariable( anyString() );
 doReturn( "" ).when( meta ).getParameterDescription( anyString() );
 doReturn( "" ).when( meta ).getParameterDefault( anyString() );
 doReturn( "ABC" ).when( meta ).getParameterValue( anyString() );
 String carteId = UUID.randomUUID().toString();
 doReturn( carteId ).when( meta ).getContainerObjectId();
 Trans trans = new Trans( meta );
 assertEquals( carteId, trans.getContainerObjectId() );
}

代码示例来源：origin: gocd/gocd

@Test
public void shouldReturnSdkCommand() throws Exception {
  TfsCommand expectedTfsCommand = mock(TfsCommand.class);
  TfsCommandFactory spyCommandFactory = spy(tfsCommandFactory);
  TfsSDKCommandBuilder commandBuilder = mock(TfsSDKCommandBuilder.class);
  doReturn(commandBuilder).when(spyCommandFactory).getSDKBuilder();
  when(commandBuilder.buildTFSSDKCommand("fingerprint", URL, DOMAIN, USERNAME, PASSWORD, computedWorkspaceName, PROJECT_PATH)).thenReturn(expectedTfsCommand);
  TfsCommand actualTfsCommand = spyCommandFactory.create(executionContext, URL, DOMAIN, USERNAME, PASSWORD, "fingerprint", PROJECT_PATH);
  assertThat(actualTfsCommand, is(expectedTfsCommand));
  verify(commandBuilder).buildTFSSDKCommand("fingerprint", URL, DOMAIN, USERNAME, PASSWORD, computedWorkspaceName, PROJECT_PATH);
}

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