Examples of com.google.common.testing.TestLogHandler

com.google.common.testing.TestLogHandler

Tests may use this to intercept messages that are logged by the code under test. Example:

 TestLogHandler handler; protected void setUp() throws Exception { super.setUp(); handler = new TestLogHandler(); SomeClass.logger.addHandler(handler); addTearDown(new TearDown() { public void tearDown() throws Exception { SomeClass.logger.removeHandler(handler); } }); } public void test() { SomeClass.foo(); LogRecord firstRecord = handler.getStoredLogRecords().get(0); assertEquals("some message", firstRecord.getMessage()); }

@author Kevin Bourrillion @since Guava release 10


  @Override protected void setUp() throws Exception {
    test = new TearDownTestCase() {};
    test.setUp();
    messages = new ArrayList<String>();
    handler = new TestLogHandler();
    TearDownStack.logger.addHandler(handler);
    TearDownStack.logger.setUseParentHandlers(false);
  }

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  private TestLogHandler handler;


  @Override protected void setUp() throws Exception {
    test = new TearDownTestCase() {};
    messages = new ArrayList<String>();
    handler = new TestLogHandler();
    TearDownStack.logger.addHandler(handler);
    TearDownStack.logger.setUseParentHandlers(false);
  }

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  TestLogHandler logHandler;


  @Override
  public void setUp() throws Exception {
    super.setUp();
    logHandler = new TestLogHandler();
    LocalCache.logger.addHandler(logHandler);
  }

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   * makes sense.
   */
  public void testEmptyServiceManager() {
    Logger logger = Logger.getLogger(ServiceManager.class.getName());
    logger.setLevel(Level.FINEST);
    TestLogHandler logHandler = new TestLogHandler();
    logger.addHandler(logHandler);
    ServiceManager manager = new ServiceManager(Arrays.<Service>asList());
    RecordingListener listener = new RecordingListener();
    manager.addListener(listener);
    manager.startAsync().awaitHealthy();
    assertTrue(manager.isHealthy());
    assertTrue(listener.healthyCalled);
    assertFalse(listener.stoppedCalled);
    assertTrue(listener.failedServices.isEmpty());
    manager.stopAsync().awaitStopped();
    assertFalse(manager.isHealthy());
    assertTrue(listener.stoppedCalled);
    assertTrue(listener.failedServices.isEmpty());
    // check that our NoOpService is not directly observable via any of the inspection methods or
    // via logging.
    assertEquals("ServiceManager{services=[]}", manager.toString());
    assertTrue(manager.servicesByState().isEmpty());
    assertTrue(manager.startupTimes().isEmpty());
    Formatter logFormatter = new Formatter() {
      @Override public String format(LogRecord record) {
        return formatMessage(record);
      }
    };
    for (LogRecord record : logHandler.getStoredLogRecords()) {
      assertFalse(logFormatter.format(record).contains("NoOpService"));
    }
  }

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   * the original error (which was not constructing ServiceManager correctly).
   */
  public void testPartiallyConstructedManager() {
    Logger logger = Logger.getLogger("global");
    logger.setLevel(Level.FINEST);
    TestLogHandler logHandler = new TestLogHandler();
    logger.addHandler(logHandler);
    NoOpService service = new NoOpService();
    service.startAsync();
    try {
      new ServiceManager(Arrays.asList(service));
      fail();
    } catch (IllegalArgumentException expected) {}
    service.stopAsync();
    // Nothing was logged!
    assertEquals(0, logHandler.getStoredLogRecords().size());
  }

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  public void testCopyExceptions() {
    if (!Closer.SuppressingSuppressor.isAvailable()) {
      // test that exceptions are logged


      TestLogHandler logHandler = new TestLogHandler();
      Closeables.logger.addHandler(logHandler);
      try {
        for (CharSource in : BROKEN_SOURCES) {
          runFailureTest(in, newNormalCharSink());
          assertTrue(logHandler.getStoredLogRecords().isEmpty());


          runFailureTest(in, BROKEN_CLOSE_SINK);
          assertEquals((in == BROKEN_OPEN_SOURCE) ? 0 : 1, getAndResetRecords(logHandler));
        }


        for (CharSink out : BROKEN_SINKS) {
          runFailureTest(newNormalCharSource(), out);
          assertTrue(logHandler.getStoredLogRecords().isEmpty());


          runFailureTest(BROKEN_CLOSE_SOURCE, out);
          assertEquals(1, getAndResetRecords(logHandler));
        }

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        new Suppression(c2, c3Exception, c2Exception),
        new Suppression(c1, c3Exception, c1Exception));
  }


  public static void testLoggingSuppressor() throws IOException {
    TestLogHandler logHandler = new TestLogHandler();


    Closeables.logger.addHandler(logHandler);
    try {
      Closer closer = new Closer(new Closer.LoggingSuppressor());


      TestCloseable c1 = closer.register(TestCloseable.throwsOnClose(new IOException()));
      TestCloseable c2 = closer.register(TestCloseable.throwsOnClose(new RuntimeException()));
      try {
        throw closer.rethrow(new IOException("thrown"), IOException.class);
      } catch (IOException expected) {}


      assertTrue(logHandler.getStoredLogRecords().isEmpty());


      closer.close();


      assertEquals(2, logHandler.getStoredLogRecords().size());


      LogRecord record = logHandler.getStoredLogRecords().get(0);
      assertEquals("Suppressing exception thrown when closing " + c2, record.getMessage());


      record = logHandler.getStoredLogRecords().get(1);
      assertEquals("Suppressing exception thrown when closing " + c1, record.getMessage());
    } finally {
      Closeables.logger.removeHandler(logHandler);
    }
  }

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  TestLogHandler logHandler;


  @Override
  public void setUp() throws Exception {
    super.setUp();
    logHandler = new TestLogHandler();
    LocalCache.logger.addHandler(logHandler);
  }

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  public void testCopyExceptions() {
    if (!Closer.SuppressingSuppressor.isAvailable()) {
      // test that exceptions are logged


      TestLogHandler logHandler = new TestLogHandler();
      Closeables.logger.addHandler(logHandler);
      try {
        for (ByteSource in : BROKEN_SOURCES) {
          runFailureTest(in, newNormalByteSink());
          assertTrue(logHandler.getStoredLogRecords().isEmpty());


          runFailureTest(in, BROKEN_CLOSE_SINK);
          assertEquals((in == BROKEN_OPEN_SOURCE) ? 0 : 1, getAndResetRecords(logHandler));
        }


        for (ByteSink out : BROKEN_SINKS) {
          runFailureTest(newNormalByteSource(), out);
          assertTrue(logHandler.getStoredLogRecords().isEmpty());


          runFailureTest(BROKEN_CLOSE_SOURCE, out);
          assertEquals(1, getAndResetRecords(logHandler));
        }

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  TestLogHandler logHandler;


  @Override
  public void setUp() throws Exception {
    super.setUp();
    logHandler = new TestLogHandler();
    LocalCache.logger.addHandler(logHandler);
  }

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com.google.common.cache.CacheLoadingTest

com.google.common.cache.LocalCacheTest

com.google.common.io.ByteSourceTest

com.google.common.io.CharSourceTest

com.google.common.io.CloserTest

com.google.common.testing.junit3.TearDownTestCaseTest

com.google.common.testing.junit4.TearDownTestCaseTest

com.google.common.util.concurrent.ServiceManagerTest

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