src/test/cpp/loggertestcase.cpp

/*
 * 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.
 */

#include <log4cxx/logger.h>
#include <log4cxx/fileappender.h>
#include <log4cxx/appenderskeleton.h>
#include <log4cxx/basicconfigurator.h>
#include <log4cxx/logmanager.h>
#include <log4cxx/level.h>
#include <log4cxx/hierarchy.h>
#include <log4cxx/loggerinstance.h>
#include <log4cxx/spi/rootlogger.h>
#include <log4cxx/helpers/propertyresourcebundle.h>
#include "insertwide.h"
#include "testchar.h"
#include "logunit.h"
#include <log4cxx/helpers/locale.h>
#include "vectorappender.h"

using namespace log4cxx;
using namespace log4cxx::spi;
using namespace log4cxx::helpers;

class CountingAppender;
typedef std::shared_ptr<CountingAppender> CountingAppenderPtr;

class CountingAppender : public AppenderSkeleton
{
	public:
		int counter;

		CountingAppender() : counter(0)
		{}

		void close() override
		{}

		void append( const spi::LoggingEventPtr& event ) override
		{
			counter++;
		}

		bool requiresLayout() const override
		{
			return true;
		}
};

class CountingListener : public HierarchyEventListener{
public:
	DECLARE_LOG4CXX_OBJECT(CountingListener)
	BEGIN_LOG4CXX_CAST_MAP()
	LOG4CXX_CAST_ENTRY(CountingListener)
	END_LOG4CXX_CAST_MAP()

	int numRemoved = 0;
	int numAdded = 0;

	void addAppenderEvent(
		const Logger* logger,
			const Appender* appender) override {
		numAdded++;
	}

	void removeAppenderEvent(
		const Logger* logger,
			const Appender* appender) override {
		numRemoved++;
	}
};

IMPLEMENT_LOG4CXX_OBJECT(CountingListener);

LOGUNIT_CLASS(LoggerTestCase)
{
	LOGUNIT_TEST_SUITE(LoggerTestCase);
	LOGUNIT_TEST(testAppender1);
	LOGUNIT_TEST(testAppender2);
	LOGUNIT_TEST(testAdditivity1);
	LOGUNIT_TEST(testAdditivity2);
	LOGUNIT_TEST(testAdditivity3);
	LOGUNIT_TEST(testDisable1);
	//    LOGUNIT_TEST(testRB1);
	//    LOGUNIT_TEST(testRB2);  //TODO restore
	//    LOGUNIT_TEST(testRB3);
	LOGUNIT_TEST(testExists);
	LOGUNIT_TEST(testHierarchy1);
	LOGUNIT_TEST(testLoggerInstance);
	LOGUNIT_TEST(testTrace);
	LOGUNIT_TEST(testIsTraceEnabled);
	LOGUNIT_TEST(testAddingListeners);
	LOGUNIT_TEST(testAddingAndRemovingListeners);
	LOGUNIT_TEST(testAddingAndRemovingListeners2);
	LOGUNIT_TEST_SUITE_END();

public:
	void setUp()
	{
	}

	void tearDown()
	{
		BasicConfigurator::resetConfiguration();
		a1 = 0;
		a2 = 0;
		logger = 0;
	}

	/**
	Add an appender and see if it can be retrieved.
	*/
	void testAppender1()
	{
		logger = Logger::getLogger(LOG4CXX_TEST_STR("test"));
		a1 = FileAppenderPtr(new FileAppender());
		a1->setName(LOG4CXX_STR("testAppender1"));
		logger->addAppender(a1);

		AppenderList list = logger->getAllAppenders();
		AppenderPtr aHat = list.front();
		LOGUNIT_ASSERT_EQUAL(a1, aHat);
	}

	/**
	Add an appender X, Y, remove X and check if Y is the only
	remaining appender.
	*/
	void testAppender2()
	{
		a1 = FileAppenderPtr(new FileAppender());
		a1->setName(LOG4CXX_STR("testAppender2.1"));
		a2 = FileAppenderPtr(new FileAppender());
		a2->setName(LOG4CXX_STR("testAppender2.2"));

		logger = Logger::getLogger(LOG4CXX_TEST_STR("test"));
		logger->addAppender(a1);
		logger->addAppender(a2);
		LOGUNIT_ASSERT(logger->removeAppender(LOG4CXX_STR("testAppender2.1")));

		AppenderList list = logger->getAllAppenders();
		AppenderPtr aHat = list.front();
		LOGUNIT_ASSERT_EQUAL(a2, aHat);
		LOGUNIT_ASSERT(list.size() == 1);
	}

	/**
	Test if LoggerPtr a.b inherits its appender from a.
	*/
	void testAdditivity1()
	{
		LoggerPtr a = Logger::getLogger(LOG4CXX_TEST_STR("a"));
		LoggerPtr ab = Logger::getLogger(LOG4CXX_TEST_STR("a.b"));
		CountingAppenderPtr ca = CountingAppenderPtr(new CountingAppender());
		a->addAppender(ca);

		LOGUNIT_ASSERT_EQUAL(ca->counter, 0);
		ab->debug(MSG);
		LOGUNIT_ASSERT_EQUAL(ca->counter, 1);
		ab->info(MSG);
		LOGUNIT_ASSERT_EQUAL(ca->counter, 2);
		ab->warn(MSG);
		LOGUNIT_ASSERT_EQUAL(ca->counter, 3);
		ab->error(MSG);
		LOGUNIT_ASSERT_EQUAL(ca->counter, 4);
	}

	/**
	Test multiple additivity.
	*/
	void testAdditivity2()
	{
		LoggerPtr a = Logger::getLogger(LOG4CXX_TEST_STR("a"));
		LoggerPtr ab = Logger::getLogger(LOG4CXX_TEST_STR("a.b"));
		LoggerPtr abc = Logger::getLogger(LOG4CXX_TEST_STR("a.b.c"));
		LoggerPtr x = Logger::getLogger(LOG4CXX_TEST_STR("x"));

		CountingAppenderPtr ca1 = CountingAppenderPtr(new CountingAppender());
		CountingAppenderPtr ca2 = CountingAppenderPtr(new CountingAppender());
		CountingAppenderPtr xa = CountingAppenderPtr(new CountingAppender());

		a->addAppender(ca1);
		abc->addAppender(ca2);
		x->addAppender(xa);

		LOGUNIT_ASSERT_EQUAL(ca1->counter, 0);
		LOGUNIT_ASSERT_EQUAL(ca2->counter, 0);

		ab->debug(MSG);
		LOGUNIT_ASSERT_EQUAL(ca1->counter, 1);
		LOGUNIT_ASSERT_EQUAL(ca2->counter, 0);

		abc->debug(MSG);
		LOGUNIT_ASSERT_EQUAL(ca1->counter, 2);
		LOGUNIT_ASSERT_EQUAL(ca2->counter, 1);

		x->debug(MSG);
		LOGUNIT_ASSERT_EQUAL(ca1->counter, 2);
		LOGUNIT_ASSERT_EQUAL(ca2->counter, 1);
	}

	/**
	Test additivity flag.
	*/
	void testAdditivity3()
	{
		LoggerPtr root = Logger::getRootLogger();
		LoggerPtr a = Logger::getLogger(LOG4CXX_TEST_STR("a"));
		LoggerPtr ab = Logger::getLogger(LOG4CXX_TEST_STR("a.b"));
		LoggerPtr abc = Logger::getLogger(LOG4CXX_TEST_STR("a.b.c"));
		LoggerPtr x = Logger::getLogger(LOG4CXX_TEST_STR("x"));

		CountingAppenderPtr caRoot = CountingAppenderPtr(new CountingAppender());
		CountingAppenderPtr caA = CountingAppenderPtr(new CountingAppender());
		CountingAppenderPtr caABC = CountingAppenderPtr(new CountingAppender());
		CountingAppenderPtr cab = CountingAppenderPtr(new CountingAppender());

		root->addAppender(caRoot);
		a->addAppender(caA);
		abc->addAppender(caABC);

		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 0);
		LOGUNIT_ASSERT_EQUAL(caA->counter, 0);
		LOGUNIT_ASSERT_EQUAL(caABC->counter, 0);

		ab->setAdditivity(false);

		a->debug(MSG);
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 1);
		LOGUNIT_ASSERT_EQUAL(caA->counter, 1);
		LOGUNIT_ASSERT_EQUAL(caABC->counter, 0);

		ab->addAppender(cab);
		ab->debug(MSG);
		LOGUNIT_ASSERT_EQUAL(cab->counter, 1);
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 1);
		LOGUNIT_ASSERT_EQUAL(caA->counter, 1);
		LOGUNIT_ASSERT_EQUAL(caABC->counter, 0);

		abc->debug(MSG);
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 1);
		LOGUNIT_ASSERT_EQUAL(caA->counter, 1);
		LOGUNIT_ASSERT_EQUAL(caABC->counter, 1);
	}

	void testDisable1()
	{
		CountingAppenderPtr caRoot = CountingAppenderPtr(new CountingAppender());
		LoggerPtr root = Logger::getRootLogger();
		root->addAppender(caRoot);

		auto h = LogManager::getLoggerRepository();

		//h.disableDebug();
		h->setThreshold(Level::getInfo());
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 0);

		root->debug(MSG);
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 0);
		root->info(MSG);
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 1);
		root->log(Level::getWarn(), MSG);
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 2);
		root->warn(MSG);
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 3);

		//h.disableInfo();
		h->setThreshold(Level::getWarn());
		root->debug(MSG);
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 3);
		root->info(MSG);
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 3);
		root->log(Level::getWarn(), MSG);
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 4);
		root->error(MSG);
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 5);
		root->log(Level::getError(), MSG);
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 6);

		//h.disableAll();
		h->setThreshold(Level::getOff());
		root->debug(MSG);
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 6);
		root->info(MSG);
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 6);
		root->log(Level::getWarn(), MSG);
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 6);
		root->error(MSG);
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 6);
		root->log(Level::getFatal(), MSG);
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 6);
		root->log(Level::getFatal(), MSG);
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 6);

		//h.disable(Level::getFatalLevel());
		h->setThreshold(Level::getOff());
		root->debug(MSG);
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 6);
		root->info(MSG);
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 6);
		root->log(Level::getWarn(), MSG);
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 6);
		root->error(MSG);
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 6);
		root->log(Level::getWarn(), MSG);
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 6);
		root->log(Level::getFatal(), MSG);
		LOGUNIT_ASSERT_EQUAL(caRoot->counter, 6);
	}


	ResourceBundlePtr getBundle(const LogString & lang, const LogString & region)
	{
		Locale l(lang, region);
		ResourceBundlePtr bundle(
			PropertyResourceBundle::getBundle(LOG4CXX_STR("L7D"), l));
		LOGUNIT_ASSERT(bundle != 0);
		return bundle;
	}

	void testRB1()
	{
		ResourceBundlePtr rbUS(getBundle(LOG4CXX_STR("en"), LOG4CXX_STR("US")));
		ResourceBundlePtr rbFR(getBundle(LOG4CXX_STR("fr"), LOG4CXX_STR("FR")));
		ResourceBundlePtr rbCH(getBundle(LOG4CXX_STR("fr"), LOG4CXX_STR("CH")));

		LoggerPtr root = Logger::getRootLogger();
		root->setResourceBundle(rbUS);

		ResourceBundlePtr t = root->getResourceBundle();
		LOGUNIT_ASSERT(t == rbUS);

		LoggerPtr x = Logger::getLogger(LOG4CXX_TEST_STR("x"));
		LoggerPtr x_y = Logger::getLogger(LOG4CXX_TEST_STR("x.y"));
		LoggerPtr x_y_z = Logger::getLogger(LOG4CXX_TEST_STR("x.y.z"));

		t = x->getResourceBundle();
		LOGUNIT_ASSERT(t == rbUS);
		t = x_y->getResourceBundle();
		LOGUNIT_ASSERT(t == rbUS);
		t = x_y_z->getResourceBundle();
		LOGUNIT_ASSERT(t == rbUS);
	}

	void testRB2()
	{
		LoggerPtr root = Logger::getRootLogger();
		ResourceBundlePtr rbUS(getBundle(LOG4CXX_STR("en"), LOG4CXX_STR("US")));
		ResourceBundlePtr rbFR(getBundle(LOG4CXX_STR("fr"), LOG4CXX_STR("FR")));
		ResourceBundlePtr rbCH(getBundle(LOG4CXX_STR("fr"), LOG4CXX_STR("CH")));

		root->setResourceBundle(rbUS);

		ResourceBundlePtr t = root->getResourceBundle();
		LOGUNIT_ASSERT(t == rbUS);

		LoggerPtr x = Logger::getLogger(LOG4CXX_TEST_STR("x"));
		LoggerPtr x_y = Logger::getLogger(LOG4CXX_TEST_STR("x.y"));
		LoggerPtr x_y_z = Logger::getLogger(LOG4CXX_TEST_STR("x.y.z"));

		x_y->setResourceBundle(rbFR);
		t = x->getResourceBundle();
		LOGUNIT_ASSERT(t == rbUS);
		t = x_y->getResourceBundle();
		LOGUNIT_ASSERT(t == rbFR);
		t = x_y_z->getResourceBundle();
		LOGUNIT_ASSERT(t == rbFR);
	}

	void testRB3()
	{
		ResourceBundlePtr rbUS(getBundle(LOG4CXX_STR("en"), LOG4CXX_STR("US")));
		ResourceBundlePtr rbFR(getBundle(LOG4CXX_STR("fr"), LOG4CXX_STR("FR")));
		ResourceBundlePtr rbCH(getBundle(LOG4CXX_STR("fr"), LOG4CXX_STR("CH")));

		LoggerPtr root = Logger::getRootLogger();
		root->setResourceBundle(rbUS);

		ResourceBundlePtr t = root->getResourceBundle();
		LOGUNIT_ASSERT(t == rbUS);

		LoggerPtr x = Logger::getLogger(LOG4CXX_TEST_STR("x"));
		LoggerPtr x_y = Logger::getLogger(LOG4CXX_TEST_STR("x.y"));
		LoggerPtr x_y_z = Logger::getLogger(LOG4CXX_TEST_STR("x.y.z"));

		x_y->setResourceBundle(rbFR);
		x_y_z->setResourceBundle(rbCH);
		t = x->getResourceBundle();
		LOGUNIT_ASSERT(t == rbUS);
		t = x_y->getResourceBundle();
		LOGUNIT_ASSERT(t == rbFR);
		t = x_y_z->getResourceBundle();
		LOGUNIT_ASSERT(t == rbCH);
	}

	void testExists()
	{
		LoggerPtr a = Logger::getLogger(LOG4CXX_TEST_STR("a"));
		LoggerPtr a_b = Logger::getLogger(LOG4CXX_TEST_STR("a.b"));
		LoggerPtr a_b_c = Logger::getLogger(LOG4CXX_TEST_STR("a.b.c"));

		LoggerPtr t;
		t = LogManager::exists(LOG4CXX_TEST_STR("xx"));
		LOGUNIT_ASSERT(t == 0);
		t = LogManager::exists(LOG4CXX_TEST_STR("a"));
		LOGUNIT_ASSERT_EQUAL(a, t);
		t = LogManager::exists(LOG4CXX_TEST_STR("a.b"));
		LOGUNIT_ASSERT_EQUAL(a_b, t);
		t = LogManager::exists(LOG4CXX_TEST_STR("a.b.c"));
		LOGUNIT_ASSERT_EQUAL(a_b_c, t);
	}

	void testHierarchy1()
	{
		LoggerRepositoryPtr h = Hierarchy::create();
		LoggerPtr root(h->getRootLogger());
		root->setLevel(Level::getError());
		LoggerPtr a0 = h->getLogger(LOG4CXX_STR("a"));
		LOGUNIT_ASSERT_EQUAL((LogString) LOG4CXX_STR("a"), a0->getName());
		LOGUNIT_ASSERT(a0->getLevel() == 0);
		LOGUNIT_ASSERT(Level::getError() == a0->getEffectiveLevel());

		LoggerPtr a11 = h->getLogger(LOG4CXX_STR("a"));
		LOGUNIT_ASSERT_EQUAL(a0, a11);

		LoggerPtr abc = h->getLogger(LOG4CXX_STR("a.b.c"));
		LOGUNIT_ASSERT_EQUAL((LogString) LOG4CXX_STR("a.b.c"), abc->getName());
		LOGUNIT_ASSERT(abc->getLevel() == 0);
		LOGUNIT_ASSERT(Level::getError() == abc->getEffectiveLevel());

		// Check the threshold is changed in children of root
		root->setLevel(Level::getTrace());
		LOGUNIT_ASSERT(Level::getTrace() == abc->getEffectiveLevel());
		LOGUNIT_ASSERT_EQUAL(true, a0->isTraceEnabled());
		LOGUNIT_ASSERT_EQUAL(true, Logger::isTraceEnabledFor(a0));
		LOGUNIT_ASSERT_EQUAL(true, abc->isTraceEnabled());
		LOGUNIT_ASSERT_EQUAL(true, Logger::isTraceEnabledFor(abc));
	}

	void testLoggerInstance()
	{
		LoggerInstancePtr initiallyNull;
		auto ca = std::make_shared<CountingAppender>();
		Logger::getRootLogger()->addAppender(ca);

		// Check instance loggers are removed from the LoggerRepository
		std::vector<LogString> instanceNames =
		{ LOG4CXX_STR("xxx.zzz")
		, LOG4CXX_STR("xxx.aaaa")
		, LOG4CXX_STR("xxx.bbb")
		, LOG4CXX_STR("xxx.ccc")
		, LOG4CXX_STR("xxx.ddd")
		};
		auto initialCount = LogManager::getCurrentLoggers().size();
		int expectedCount = 0;
		for (auto loggerName : instanceNames)
		{
			LoggerInstancePtr instanceLogger(loggerName);
			instanceLogger->info("Hello, World.");
			++expectedCount;
		}
		auto finalCount = LogManager::getCurrentLoggers().size();
		LOGUNIT_ASSERT_EQUAL(initialCount, finalCount);
		LOGUNIT_ASSERT_EQUAL(ca->counter, expectedCount);

		// Check the logger is not removed when referenced elsewhere
		auto a = Logger::getLogger(LOG4CXX_TEST_STR("xxx.aaaa"));
		{
			LoggerInstancePtr instanceLogger(LOG4CXX_TEST_STR("xxx.aaaa"));
			instanceLogger->info("Hello, World.");
			++expectedCount;
		}
		LOGUNIT_ASSERT(LogManager::exists(LOG4CXX_TEST_STR("xxx.aaaa")));
		LOGUNIT_ASSERT_EQUAL(ca->counter, expectedCount);

		// Check reset
		initiallyNull.reset("InitiallyNullLoggerPtr");
		LOGUNIT_ASSERT(initiallyNull);
		LOG4CXX_INFO(initiallyNull, "Hello, World.");
	}

	void compileTestForLOGCXX202() const
	{
		//
		//   prior to fix, these line would compile.
		//
		(*logger).info("Hello, World.");
		((Logger*) logger.get())->info("Hello, World.");
		//
		//   this one would not.
		//
		logger->info("Hello, World.");
	}


	/**
	 * Tests logger.trace(Object).
	 *
	 */
	void testTrace()
	{
		VectorAppenderPtr appender = VectorAppenderPtr(new VectorAppender());
		LoggerPtr root = Logger::getRootLogger();
		root->addAppender(appender);
		root->setLevel(Level::getInfo());

		LoggerPtr tracer = Logger::getLogger("com.example.Tracer");
		tracer->setLevel(Level::getTrace());

		LOG4CXX_TRACE(tracer, "Message 1");
		LOG4CXX_TRACE(root, "Discarded Message");
		LOG4CXX_TRACE(root, "Discarded Message");

		std::vector<LoggingEventPtr> msgs(appender->vector);
		LOGUNIT_ASSERT_EQUAL((size_t) 1, msgs.size());
		LoggingEventPtr event = msgs[0];
		LOGUNIT_ASSERT_EQUAL((int) Level::TRACE_INT, event->getLevel()->toInt());
		LOGUNIT_ASSERT_EQUAL(LogString(LOG4CXX_STR("Message 1")), event->getMessage());
	}

	/**
	 * Tests isTraceEnabled.
	 *
	 */
	void testIsTraceEnabled()
	{
		VectorAppenderPtr appender = VectorAppenderPtr(new VectorAppender());
		LoggerPtr root = Logger::getRootLogger();
		root->addAppender(appender);
		root->setLevel(Level::getInfo());

		LoggerPtr tracer = Logger::getLogger("com.example.Tracer");
		tracer->setLevel(Level::getTrace());

		LOGUNIT_ASSERT_EQUAL(true, tracer->isTraceEnabled());
		LOGUNIT_ASSERT_EQUAL(true, Logger::isTraceEnabledFor(tracer));
		LOGUNIT_ASSERT_EQUAL(true, Logger::isDebugEnabledFor(tracer));
		LOGUNIT_ASSERT_EQUAL(true, Logger::isInfoEnabledFor(tracer));
		LOGUNIT_ASSERT_EQUAL(true, Logger::isWarnEnabledFor(tracer));
		LOGUNIT_ASSERT_EQUAL(true, Logger::isErrorEnabledFor(tracer));
		LOGUNIT_ASSERT_EQUAL(false, root->isTraceEnabled());
		LOGUNIT_ASSERT_EQUAL(false, Logger::isTraceEnabledFor(root));
		LOGUNIT_ASSERT_EQUAL(false, Logger::isDebugEnabledFor(root));
		LOGUNIT_ASSERT_EQUAL(true, Logger::isInfoEnabledFor(root));
		LOGUNIT_ASSERT_EQUAL(true, Logger::isWarnEnabledFor(root));
		LOGUNIT_ASSERT_EQUAL(true, Logger::isErrorEnabledFor(root));
	}

	void testAddingListeners()
	{
		auto appender = std::shared_ptr<CountingAppender>(new CountingAppender);
		LoggerPtr root = Logger::getRootLogger();
		std::shared_ptr<CountingListener> listener = std::shared_ptr<CountingListener>(new CountingListener());

		root->getLoggerRepository()->addHierarchyEventListener(listener);

		root->addAppender(appender);

		LOGUNIT_ASSERT_EQUAL(1, listener->numAdded);
		LOGUNIT_ASSERT_EQUAL(0, listener->numRemoved);
	}

	void testAddingAndRemovingListeners()
	{
		auto appender = std::shared_ptr<CountingAppender>(new CountingAppender);
		LoggerPtr root = Logger::getRootLogger();
		std::shared_ptr<CountingListener> listener = std::shared_ptr<CountingListener>(new CountingListener());

		root->getLoggerRepository()->addHierarchyEventListener(listener);

		root->addAppender(appender);

		LOGUNIT_ASSERT_EQUAL(1, listener->numAdded);
		LOGUNIT_ASSERT_EQUAL(0, listener->numRemoved);

		LOGUNIT_ASSERT(root->removeAppender(appender));

		LOGUNIT_ASSERT_EQUAL(1, listener->numAdded);
		LOGUNIT_ASSERT_EQUAL(1, listener->numRemoved);
	}

	void testAddingAndRemovingListeners2()
	{
		auto appender = std::shared_ptr<CountingAppender>(new CountingAppender);
		auto appender2 = std::shared_ptr<CountingAppender>(new CountingAppender);
		LoggerPtr root = Logger::getRootLogger();
		std::shared_ptr<CountingListener> listener = std::shared_ptr<CountingListener>(new CountingListener());

		root->getLoggerRepository()->addHierarchyEventListener(listener);

		root->addAppender(appender);

		LOGUNIT_ASSERT_EQUAL(1, listener->numAdded);
		LOGUNIT_ASSERT_EQUAL(0, listener->numRemoved);

		root->addAppender(appender2);

		LOGUNIT_ASSERT_EQUAL(2, listener->numAdded);
		LOGUNIT_ASSERT_EQUAL(0, listener->numRemoved);

		root->removeAllAppenders();

		LOGUNIT_ASSERT_EQUAL(2, listener->numAdded);
		LOGUNIT_ASSERT_EQUAL(2, listener->numRemoved);
	}

protected:
	static LogString MSG;
	LoggerPtr logger;
	AppenderPtr a1;
	AppenderPtr a2;
};

LogString LoggerTestCase::MSG(LOG4CXX_STR("M"));

LOGUNIT_TEST_SUITE_REGISTRATION(LoggerTestCase);