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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#define BOOST_TEST_DYN_LINK
#define BOOST_TEST_MAIN
#define BOOST_TEST_MODULE zkfacade test
#include <vespa/fastos/fastos.h>
#include <boost/test/unit_test.hpp>
#include <iostream>
#include <boost/thread/barrier.hpp>
#include <boost/checked_delete.hpp>
#include <vespa/filedistribution/common/componentsdeleter.h>
#include <vespa/filedistribution/model/zkfacade.h>
#include <zookeeper/zookeeper.h>
using namespace std::literals;
using namespace filedistribution;
namespace {
struct Watcher : public ZKFacade::NodeChangedWatcher {
boost::barrier _barrier;
Watcher() :
_barrier(2) {}
void operator()() override {
_barrier.wait();
}
};
struct Fixture {
ComponentsDeleter _componentsDeleter;
std::shared_ptr<ZKFacade> zk;
Path testNode;
Fixture() {
zoo_set_debug_level(ZOO_LOG_LEVEL_WARN);
zk = _componentsDeleter.track(new ZKFacade("test1-tonyv:2181", false));
testNode = "/test-node";
zk->removeIfExists(testNode);
}
~Fixture() {
if (zk) {
zk->removeIfExists(testNode);
}
}
};
} //anonymous namespace
BOOST_FIXTURE_TEST_SUITE(ZKFacadeTests, Fixture)
BOOST_AUTO_TEST_CASE(hasNode)
{
zk->setData(testNode, "", 0);
BOOST_CHECK(zk->hasNode(testNode));
zk->remove(testNode);
BOOST_CHECK(!zk->hasNode(testNode));
}
BOOST_AUTO_TEST_CASE(getValidZKServers)
{
BOOST_CHECK_EQUAL("localhost:22", ZKFacade::getValidZKServers("localhost:22", false));
BOOST_CHECK_EQUAL("localhost:22", ZKFacade::getValidZKServers("localhost:22", true));
BOOST_CHECK_EQUAL("idonotexist:22", ZKFacade::getValidZKServers("idonotexist:22", false));
BOOST_CHECK_EQUAL("", ZKFacade::getValidZKServers("idonotexist:22", true));
BOOST_CHECK_EQUAL("localhost:22,idonotexist:22", ZKFacade::getValidZKServers("localhost:22,idonotexist:22", false));
BOOST_CHECK_EQUAL("localhost:22", ZKFacade::getValidZKServers("localhost:22,idonotexist:22", true));
BOOST_CHECK_EQUAL("idonotexist:22,localhost:22", ZKFacade::getValidZKServers("idonotexist:22,localhost:22", false));
BOOST_CHECK_EQUAL("localhost:22", ZKFacade::getValidZKServers("idonotexist:22,localhost:22", true));
}
BOOST_AUTO_TEST_CASE(hasNodeNotification)
{
std::shared_ptr<Watcher> watcher(new Watcher);
zk->hasNode(testNode, watcher);
zk->setData(testNode, "", 0);
watcher->_barrier.wait();
//after the notification has returned, the watcher must no longer reside in watchers map.
for (int i=0; i<20 && !watcher.unique(); ++i) {
std::this_thread::sleep_for(100ms);
}
BOOST_CHECK(watcher.unique());
}
BOOST_AUTO_TEST_CASE(getAndSetData)
{
std::string inputString = "test data.";
Buffer inputBuffer(inputString.begin(), inputString.end());
zk->setData(testNode, inputBuffer);
Buffer outputBuffer(zk->getData(testNode));
std::string outputString(outputBuffer.begin(), outputBuffer.end());
BOOST_CHECK(outputString == inputString);
outputString = zk->getString(testNode);
BOOST_CHECK(outputString == inputString);
}
BOOST_AUTO_TEST_CASE(setDataMustExist)
{
bool mustExist = true;
BOOST_REQUIRE_THROW(zk->setData(testNode, "", 0, mustExist), ZKNodeDoesNotExistsException);
}
BOOST_AUTO_TEST_CASE(createSequenceNode)
{
zk->setData(testNode, "", 0);
Path prefix = testNode / "prefix";
zk->createSequenceNode(prefix, "test", 4);
zk->createSequenceNode(prefix, "test", 4);
zk->createSequenceNode(prefix, "test", 4);
std::vector<std::string> children = zk->getChildren(testNode);
BOOST_CHECK(children.size() == 3);
BOOST_CHECK(children.begin()->substr(0,6) == "prefix");
Buffer buffer(zk->getData(testNode / *children.begin()));
std::string bufferContent(buffer.begin(), buffer.end());
BOOST_CHECK(bufferContent == "test");
}
BOOST_AUTO_TEST_CASE(retainOnly)
{
zk->setData(testNode, "", 0);
zk->setData(testNode / "a", "", 0);
zk->setData(testNode / "b", "", 0);
zk->setData(testNode / "c", "", 0);
zk->setData(testNode / "d", "", 0);
std::vector<std::string> toRetain;
toRetain.push_back("a");
toRetain.push_back("c");
zk->retainOnly(testNode, toRetain);
std::vector<std::string> children = zk->getChildren(testNode);
std::sort(children.begin(), children.end());
BOOST_CHECK(children == toRetain);
}
BOOST_AUTO_TEST_CASE(addEphemeralNode)
{
Path ephemeralNode = "/test-ephemeral-node";
zk->removeIfExists(ephemeralNode);
//Checked deleter is ok here since we're not installing any watchers
ZKFacade::SP zk2(new ZKFacade("test1-tonyv:2181", false), boost::checked_deleter<ZKFacade>());
zk2->addEphemeralNode(ephemeralNode);
BOOST_CHECK(zk->hasNode(ephemeralNode));
zk2.reset();
BOOST_CHECK(!zk->hasNode(ephemeralNode));
}
BOOST_AUTO_TEST_CASE(dataChangedNotification)
{
std::shared_ptr<Watcher> watcher(new Watcher);
zk->setData(testNode, "", 0);
Buffer buffer(zk->getData(testNode, watcher));
BOOST_CHECK(buffer.size() == 0);
bool mustExist = true;
zk->setData(testNode, "test", 4, mustExist);
watcher->_barrier.wait();
}
BOOST_AUTO_TEST_CASE(getChildrenNotification)
{
std::shared_ptr<Watcher> watcher(new Watcher);
zk->setData(testNode, "", 0);
zk->getChildren(testNode, watcher);
zk->setData(testNode / "child", "", 0);
watcher->_barrier.wait();
}
BOOST_AUTO_TEST_CASE(require_that_zkfacade_can_be_deleted_from_callback)
{
struct DeleteZKFacadeWatcher : public Watcher {
std::shared_ptr<ZKFacade> _zk;
DeleteZKFacadeWatcher(const std::shared_ptr<ZKFacade>& zk)
:_zk(zk)
{}
void operator()() override {
BOOST_CHECK(_zk.use_count() == 2);
_zk.reset();
Watcher::operator()();
}
};
std::shared_ptr<Watcher> watcher((Watcher*)new DeleteZKFacadeWatcher(zk));
zk->setData(testNode, "", 0);
zk->getData(testNode, watcher);
ZKFacade* unprotectedZk = zk.get();
zk.reset();
unprotectedZk->setData(testNode, "t", 1);
watcher->_barrier.wait();
//Must wait longer than the zookeeper_close timeout to catch
//problems due to closing zookeeper in a zookeeper watcher thread.
sleep(3);
}
BOOST_AUTO_TEST_SUITE_END()
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