Differential D2046 Diff 6062 src/test/avalanche_tests.cpp

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src/test/avalanche_tests.cpp

// Copyright (c) 2010 The Bitcoin developers		// Copyright (c) 2010 The Bitcoin developers
// Distributed under the MIT software license, see the accompanying		// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.		// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include "avalanche.h"		#include "avalanche.h"
		#include "config.h"
		#include "net_processing.h" // For PeerLogicValidation

#include "test/test_bitcoin.h"		#include "test/test_bitcoin.h"

#include <boost/test/unit_test.hpp>		#include <boost/test/unit_test.hpp>

struct AvalancheTest {		struct AvalancheTest {
		static void runEventLoop(AvalancheProcessor &p) { p.runEventLoop(); }

static std::vector<CInv> getInvsForNextPoll(const AvalancheProcessor &p) {		static std::vector<CInv> getInvsForNextPoll(const AvalancheProcessor &p) {
return p.getInvsForNextPoll();		return p.getInvsForNextPoll();
}		}

		static NodeId getSuitableNodeToQuery(AvalancheProcessor &p) {
		return p.getSuitableNodeToQuery();
		}
};		};

BOOST_FIXTURE_TEST_SUITE(avalanche_tests, TestChain100Setup)		BOOST_FIXTURE_TEST_SUITE(avalanche_tests, TestChain100Setup)

#define REGISTER_VOTE_AND_CHECK(vr, vote, state, finalized, confidence) \		#define REGISTER_VOTE_AND_CHECK(vr, vote, state, finalized, confidence) \
vr.registerVote(vote); \		vr.registerVote(vote); \
BOOST_CHECK_EQUAL(vr.isAccepted(), state); \		BOOST_CHECK_EQUAL(vr.isAccepted(), state); \
BOOST_CHECK_EQUAL(vr.hasFinalized(), finalized); \		BOOST_CHECK_EQUAL(vr.hasFinalized(), finalized); \
▲ Show 20 Lines • Show All 62 Lines • ▼ Show 20 Lines	BOOST_AUTO_TEST_CASE(block_update) {

for (auto s : status) {		for (auto s : status) {
AvalancheBlockUpdate abu(pindex, s);		AvalancheBlockUpdate abu(pindex, s);
BOOST_CHECK(abu.getBlockIndex() == pindex);		BOOST_CHECK(abu.getBlockIndex() == pindex);
BOOST_CHECK_EQUAL(abu.getStatus(), s);		BOOST_CHECK_EQUAL(abu.getStatus(), s);
}		}
}		}

		CService ip(uint32_t i) {
		struct in_addr s;
		s.s_addr = i;
		return CService(CNetAddr(s), Params().GetDefaultPort());
		}

		std::unique_ptr<CNode> ConnectNode(const Config &config, ServiceFlags nServices,
		PeerLogicValidation &peerLogic) {
		static NodeId id = 0;

		CAddress addr(ip(GetRandInt(0xffffffff)), NODE_NONE);
		std::unique_ptr<CNode> nodeptr(new CNode(id++, ServiceFlags(NODE_NETWORK),
		0, INVALID_SOCKET, addr, 0, 0,
		CAddress(), "",
		/fInboundIn=/false));
		CNode &node = *nodeptr;
		node.SetSendVersion(PROTOCOL_VERSION);
		node.nServices = nServices;
		peerLogic.InitializeNode(config, &node);
		node.nVersion = 1;
		node.fSuccessfullyConnected = true;

		CConnmanTest::AddNode(node);
		return nodeptr;
		}

BOOST_AUTO_TEST_CASE(block_register) {		BOOST_AUTO_TEST_CASE(block_register) {
AvalancheProcessor p;		AvalancheProcessor p(g_connman.get());
std::vector<AvalancheBlockUpdate> updates;		std::vector<AvalancheBlockUpdate> updates;

CBlock block = CreateAndProcessBlock({}, CScript());		CBlock block = CreateAndProcessBlock({}, CScript());
const uint256 blockHash = block.GetHash();		const uint256 blockHash = block.GetHash();
const CBlockIndex *pindex = mapBlockIndex[blockHash];		const CBlockIndex *pindex = mapBlockIndex[blockHash];

		const Config &config = GetConfig();

		// Create a node that supports avalanche.
		auto avanode = ConnectNode(config, NODE_AVALANCHE, *peerLogic);
		NodeId nodeid = avanode->GetId();

// Querying for random block returns false.		// Querying for random block returns false.
BOOST_CHECK(!p.isAccepted(pindex));		BOOST_CHECK(!p.isAccepted(pindex));

// Add a new block. Check it is added to the polls.		// Add a new block. Check it is added to the polls.
BOOST_CHECK(p.addBlockToReconcile(pindex));		BOOST_CHECK(p.addBlockToReconcile(pindex));
auto invs = AvalancheTest::getInvsForNextPoll(p);		auto invs = AvalancheTest::getInvsForNextPoll(p);
BOOST_CHECK_EQUAL(invs.size(), 1);		BOOST_CHECK_EQUAL(invs.size(), 1);
BOOST_CHECK_EQUAL(invs[0].type, MSG_BLOCK);		BOOST_CHECK_EQUAL(invs[0].type, MSG_BLOCK);
BOOST_CHECK(invs[0].hash == blockHash);		BOOST_CHECK(invs[0].hash == blockHash);

// Newly added blocks are also considered rejected.		// Newly added blocks are also considered rejected.
BOOST_CHECK(!p.isAccepted(pindex));		BOOST_CHECK(!p.isAccepted(pindex));

// Let's vote for this block a few times.		// Let's vote for this block a few times.
AvalancheResponse resp{0, {AvalancheVote(0, blockHash)}};		AvalancheResponse resp{0, {AvalancheVote(0, blockHash)}};
for (int i = 0; i < 5; i++) {		for (int i = 0; i < 5; i++) {
p.registerVotes(resp, updates);		AvalancheTest::runEventLoop(p);
		BOOST_CHECK(p.registerVotes(nodeid, resp, updates));
BOOST_CHECK(!p.isAccepted(pindex));		BOOST_CHECK(!p.isAccepted(pindex));
BOOST_CHECK_EQUAL(updates.size(), 0);		BOOST_CHECK_EQUAL(updates.size(), 0);
}		}

// Now the state will flip.		// Now the state will flip.
p.registerVotes(resp, updates);		AvalancheTest::runEventLoop(p);
		BOOST_CHECK(p.registerVotes(nodeid, resp, updates));
BOOST_CHECK(p.isAccepted(pindex));		BOOST_CHECK(p.isAccepted(pindex));
BOOST_CHECK_EQUAL(updates.size(), 1);		BOOST_CHECK_EQUAL(updates.size(), 1);
BOOST_CHECK(updates[0].getBlockIndex() == pindex);		BOOST_CHECK(updates[0].getBlockIndex() == pindex);
BOOST_CHECK_EQUAL(updates[0].getStatus(),		BOOST_CHECK_EQUAL(updates[0].getStatus(),
AvalancheBlockUpdate::Status::Accepted);		AvalancheBlockUpdate::Status::Accepted);
updates = {};		updates = {};

// Now it is accepted, but we can vote for it numerous times.		// Now it is accepted, but we can vote for it numerous times.
for (int i = 1; i < AVALANCHE_FINALIZATION_SCORE; i++) {		for (int i = 1; i < AVALANCHE_FINALIZATION_SCORE; i++) {
p.registerVotes(resp, updates);		AvalancheTest::runEventLoop(p);
		BOOST_CHECK(p.registerVotes(nodeid, resp, updates));
BOOST_CHECK(p.isAccepted(pindex));		BOOST_CHECK(p.isAccepted(pindex));
BOOST_CHECK_EQUAL(updates.size(), 0);		BOOST_CHECK_EQUAL(updates.size(), 0);
}		}

// As long as it is not finalized, we poll.		// As long as it is not finalized, we poll.
invs = AvalancheTest::getInvsForNextPoll(p);		invs = AvalancheTest::getInvsForNextPoll(p);
BOOST_CHECK_EQUAL(invs.size(), 1);		BOOST_CHECK_EQUAL(invs.size(), 1);
BOOST_CHECK_EQUAL(invs[0].type, MSG_BLOCK);		BOOST_CHECK_EQUAL(invs[0].type, MSG_BLOCK);
BOOST_CHECK(invs[0].hash == blockHash);		BOOST_CHECK(invs[0].hash == blockHash);

// Now finalize the decision.		// Now finalize the decision.
p.registerVotes(resp, updates);		AvalancheTest::runEventLoop(p);
		BOOST_CHECK(p.registerVotes(nodeid, resp, updates));
BOOST_CHECK_EQUAL(updates.size(), 1);		BOOST_CHECK_EQUAL(updates.size(), 1);
BOOST_CHECK(updates[0].getBlockIndex() == pindex);		BOOST_CHECK(updates[0].getBlockIndex() == pindex);
BOOST_CHECK_EQUAL(updates[0].getStatus(),		BOOST_CHECK_EQUAL(updates[0].getStatus(),
AvalancheBlockUpdate::Status::Finalized);		AvalancheBlockUpdate::Status::Finalized);
updates = {};		updates = {};

// Once the decision is finalized, there is no poll for it.		// Once the decision is finalized, there is no poll for it.
invs = AvalancheTest::getInvsForNextPoll(p);		invs = AvalancheTest::getInvsForNextPoll(p);
BOOST_CHECK_EQUAL(invs.size(), 0);		BOOST_CHECK_EQUAL(invs.size(), 0);

// Now let's undo this and finalize rejection.		// Now let's undo this and finalize rejection.
BOOST_CHECK(p.addBlockToReconcile(pindex));		BOOST_CHECK(p.addBlockToReconcile(pindex));
invs = AvalancheTest::getInvsForNextPoll(p);		invs = AvalancheTest::getInvsForNextPoll(p);
BOOST_CHECK_EQUAL(invs.size(), 1);		BOOST_CHECK_EQUAL(invs.size(), 1);
BOOST_CHECK_EQUAL(invs[0].type, MSG_BLOCK);		BOOST_CHECK_EQUAL(invs[0].type, MSG_BLOCK);
BOOST_CHECK(invs[0].hash == blockHash);		BOOST_CHECK(invs[0].hash == blockHash);

// Only 3 here as we don't need to flip state.		// Only 3 here as we don't need to flip state.
resp = {0, {AvalancheVote(1, blockHash)}};		resp = {0, {AvalancheVote(1, blockHash)}};
for (int i = 0; i < 3; i++) {		for (int i = 0; i < 3; i++) {
p.registerVotes(resp, updates);		AvalancheTest::runEventLoop(p);
		BOOST_CHECK(p.registerVotes(nodeid, resp, updates));
BOOST_CHECK(!p.isAccepted(pindex));		BOOST_CHECK(!p.isAccepted(pindex));
BOOST_CHECK_EQUAL(updates.size(), 0);		BOOST_CHECK_EQUAL(updates.size(), 0);
}		}

// Now it is rejected, but we can vote for it numerous times.		// Now it is rejected, but we can vote for it numerous times.
for (int i = 0; i < AVALANCHE_FINALIZATION_SCORE; i++) {		for (int i = 0; i < AVALANCHE_FINALIZATION_SCORE; i++) {
p.registerVotes(resp, updates);		AvalancheTest::runEventLoop(p);
		BOOST_CHECK(p.registerVotes(nodeid, resp, updates));
BOOST_CHECK(!p.isAccepted(pindex));		BOOST_CHECK(!p.isAccepted(pindex));
BOOST_CHECK_EQUAL(updates.size(), 0);		BOOST_CHECK_EQUAL(updates.size(), 0);
}		}

// As long as it is not finalized, we poll.		// As long as it is not finalized, we poll.
invs = AvalancheTest::getInvsForNextPoll(p);		invs = AvalancheTest::getInvsForNextPoll(p);
BOOST_CHECK_EQUAL(invs.size(), 1);		BOOST_CHECK_EQUAL(invs.size(), 1);
BOOST_CHECK_EQUAL(invs[0].type, MSG_BLOCK);		BOOST_CHECK_EQUAL(invs[0].type, MSG_BLOCK);
BOOST_CHECK(invs[0].hash == blockHash);		BOOST_CHECK(invs[0].hash == blockHash);

// Now finalize the decision.		// Now finalize the decision.
p.registerVotes(resp, updates);		AvalancheTest::runEventLoop(p);
		BOOST_CHECK(p.registerVotes(nodeid, resp, updates));
BOOST_CHECK(!p.isAccepted(pindex));		BOOST_CHECK(!p.isAccepted(pindex));
BOOST_CHECK_EQUAL(updates.size(), 1);		BOOST_CHECK_EQUAL(updates.size(), 1);
BOOST_CHECK(updates[0].getBlockIndex() == pindex);		BOOST_CHECK(updates[0].getBlockIndex() == pindex);
BOOST_CHECK_EQUAL(updates[0].getStatus(),		BOOST_CHECK_EQUAL(updates[0].getStatus(),
AvalancheBlockUpdate::Status::Invalid);		AvalancheBlockUpdate::Status::Invalid);
updates = {};		updates = {};

// Once the decision is finalized, there is no poll for it.		// Once the decision is finalized, there is no poll for it.
invs = AvalancheTest::getInvsForNextPoll(p);		invs = AvalancheTest::getInvsForNextPoll(p);
BOOST_CHECK_EQUAL(invs.size(), 0);		BOOST_CHECK_EQUAL(invs.size(), 0);

// Adding the block twice does nothing.		// Adding the block twice does nothing.
BOOST_CHECK(p.addBlockToReconcile(pindex));		BOOST_CHECK(p.addBlockToReconcile(pindex));
BOOST_CHECK(!p.addBlockToReconcile(pindex));		BOOST_CHECK(!p.addBlockToReconcile(pindex));
BOOST_CHECK(!p.isAccepted(pindex));		BOOST_CHECK(!p.isAccepted(pindex));

		CConnmanTest::ClearNodes();
}		}

BOOST_AUTO_TEST_CASE(multi_block_register) {		BOOST_AUTO_TEST_CASE(multi_block_register) {
AvalancheProcessor p;		AvalancheProcessor p(g_connman.get());
CBlockIndex indexA, indexB;		CBlockIndex indexA, indexB;

std::vector<AvalancheBlockUpdate> updates;		std::vector<AvalancheBlockUpdate> updates;

		const Config &config = GetConfig();

		// Create a node that supports avalanche.
		auto node0 = ConnectNode(config, NODE_AVALANCHE, *peerLogic);
		auto node1 = ConnectNode(config, NODE_AVALANCHE, *peerLogic);

// Make sure the block has a hash.		// Make sure the block has a hash.
CBlock blockA = CreateAndProcessBlock({}, CScript());		CBlock blockA = CreateAndProcessBlock({}, CScript());
const uint256 blockHashA = blockA.GetHash();		const uint256 blockHashA = blockA.GetHash();
const CBlockIndex *pindexA = mapBlockIndex[blockHashA];		const CBlockIndex *pindexA = mapBlockIndex[blockHashA];

CBlock blockB = CreateAndProcessBlock({}, CScript());		CBlock blockB = CreateAndProcessBlock({}, CScript());
const uint256 blockHashB = blockB.GetHash();		const uint256 blockHashB = blockB.GetHash();
const CBlockIndex *pindexB = mapBlockIndex[blockHashB];		const CBlockIndex *pindexB = mapBlockIndex[blockHashB];

// Querying for random block returns false.		// Querying for random block returns false.
BOOST_CHECK(!p.isAccepted(pindexA));		BOOST_CHECK(!p.isAccepted(pindexA));
BOOST_CHECK(!p.isAccepted(pindexB));		BOOST_CHECK(!p.isAccepted(pindexB));

// Start voting on block A.		// Start voting on block A.
BOOST_CHECK(p.addBlockToReconcile(pindexA));		BOOST_CHECK(p.addBlockToReconcile(pindexA));
auto invs = AvalancheTest::getInvsForNextPoll(p);		auto invs = AvalancheTest::getInvsForNextPoll(p);
BOOST_CHECK_EQUAL(invs.size(), 1);		BOOST_CHECK_EQUAL(invs.size(), 1);
BOOST_CHECK_EQUAL(invs[0].type, MSG_BLOCK);		BOOST_CHECK_EQUAL(invs[0].type, MSG_BLOCK);
BOOST_CHECK(invs[0].hash == blockHashA);		BOOST_CHECK(invs[0].hash == blockHashA);

AvalancheResponse resp{		AvalancheTest::runEventLoop(p);
0, {AvalancheVote(0, blockHashA), AvalancheVote(0, blockHashB)}};		BOOST_CHECK(p.registerVotes(node0->GetId(),
p.registerVotes(resp, updates);		{0, {AvalancheVote(0, blockHashA)}}, updates));
BOOST_CHECK_EQUAL(updates.size(), 0);		BOOST_CHECK_EQUAL(updates.size(), 0);

// Start voting on block B after one vote.		// Start voting on block B after one vote.
		AvalancheResponse resp{
		0, {AvalancheVote(0, blockHashB), AvalancheVote(0, blockHashA)}};
BOOST_CHECK(p.addBlockToReconcile(pindexB));		BOOST_CHECK(p.addBlockToReconcile(pindexB));
invs = AvalancheTest::getInvsForNextPoll(p);		invs = AvalancheTest::getInvsForNextPoll(p);
BOOST_CHECK_EQUAL(invs.size(), 2);		BOOST_CHECK_EQUAL(invs.size(), 2);

// Ensure B comes before A because it has accumulated more PoW.		// Ensure B comes before A because it has accumulated more PoW.
BOOST_CHECK_EQUAL(invs[0].type, MSG_BLOCK);		BOOST_CHECK_EQUAL(invs[0].type, MSG_BLOCK);
BOOST_CHECK(invs[0].hash == blockHashB);		BOOST_CHECK(invs[0].hash == blockHashB);
BOOST_CHECK_EQUAL(invs[1].type, MSG_BLOCK);		BOOST_CHECK_EQUAL(invs[1].type, MSG_BLOCK);
BOOST_CHECK(invs[1].hash == blockHashA);		BOOST_CHECK(invs[1].hash == blockHashA);

// Let's vote for this block a few times.		// Let's vote for these blocks a few times.
for (int i = 0; i < 4; i++) {		for (int i = 0; i < 4; i++) {
p.registerVotes(resp, updates);		AvalancheTest::runEventLoop(p);
		BOOST_CHECK(p.registerVotes(node0->GetId(), resp, updates));
BOOST_CHECK_EQUAL(updates.size(), 0);		BOOST_CHECK_EQUAL(updates.size(), 0);
}		}

// Now the state will flip for A.		// Now the state will flip for A.
p.registerVotes(resp, updates);		AvalancheTest::runEventLoop(p);
		BOOST_CHECK(p.registerVotes(node0->GetId(), resp, updates));
BOOST_CHECK_EQUAL(updates.size(), 1);		BOOST_CHECK_EQUAL(updates.size(), 1);
BOOST_CHECK(updates[0].getBlockIndex() == pindexA);		BOOST_CHECK(updates[0].getBlockIndex() == pindexA);
BOOST_CHECK_EQUAL(updates[0].getStatus(),		BOOST_CHECK_EQUAL(updates[0].getStatus(),
AvalancheBlockUpdate::Status::Accepted);		AvalancheBlockUpdate::Status::Accepted);
updates = {};		updates = {};

// And then for B.		// And then for B.
p.registerVotes(resp, updates);		AvalancheTest::runEventLoop(p);
		BOOST_CHECK(p.registerVotes(node0->GetId(), resp, updates));
BOOST_CHECK_EQUAL(updates.size(), 1);		BOOST_CHECK_EQUAL(updates.size(), 1);
BOOST_CHECK(updates[0].getBlockIndex() == pindexB);		BOOST_CHECK(updates[0].getBlockIndex() == pindexB);
BOOST_CHECK_EQUAL(updates[0].getStatus(),		BOOST_CHECK_EQUAL(updates[0].getStatus(),
AvalancheBlockUpdate::Status::Accepted);		AvalancheBlockUpdate::Status::Accepted);
updates = {};		updates = {};

// Now it is rejected, but we can vote for it numerous times.		// Now it is rejected, but we can vote for it numerous times.
for (int i = 2; i < AVALANCHE_FINALIZATION_SCORE; i++) {		for (int i = 2; i < AVALANCHE_FINALIZATION_SCORE; i++) {
p.registerVotes(resp, updates);		AvalancheTest::runEventLoop(p);
		BOOST_CHECK(p.registerVotes(node0->GetId(), resp, updates));
BOOST_CHECK_EQUAL(updates.size(), 0);		BOOST_CHECK_EQUAL(updates.size(), 0);
}		}

		// Running two iterration of the event loop so that vote gets triggerd on A
		// and B.
		AvalancheTest::runEventLoop(p);
		AvalancheTest::runEventLoop(p);

// Next vote will finalize block A.		// Next vote will finalize block A.
p.registerVotes(resp, updates);		BOOST_CHECK(p.registerVotes(node1->GetId(), resp, updates));
BOOST_CHECK_EQUAL(updates.size(), 1);		BOOST_CHECK_EQUAL(updates.size(), 1);
BOOST_CHECK(updates[0].getBlockIndex() == pindexA);		BOOST_CHECK(updates[0].getBlockIndex() == pindexA);
BOOST_CHECK_EQUAL(updates[0].getStatus(),		BOOST_CHECK_EQUAL(updates[0].getStatus(),
AvalancheBlockUpdate::Status::Finalized);		AvalancheBlockUpdate::Status::Finalized);
updates = {};		updates = {};

// We do not vote on A anymore.		// We do not vote on A anymore.
invs = AvalancheTest::getInvsForNextPoll(p);		invs = AvalancheTest::getInvsForNextPoll(p);
BOOST_CHECK_EQUAL(invs.size(), 1);		BOOST_CHECK_EQUAL(invs.size(), 1);
BOOST_CHECK_EQUAL(invs[0].type, MSG_BLOCK);		BOOST_CHECK_EQUAL(invs[0].type, MSG_BLOCK);
BOOST_CHECK(invs[0].hash == blockHashB);		BOOST_CHECK(invs[0].hash == blockHashB);

// Next vote will finalize block B.		// Next vote will finalize block B.
p.registerVotes(resp, updates);		BOOST_CHECK(p.registerVotes(node0->GetId(), resp, updates));
BOOST_CHECK_EQUAL(updates.size(), 1);		BOOST_CHECK_EQUAL(updates.size(), 1);
BOOST_CHECK(updates[0].getBlockIndex() == pindexB);		BOOST_CHECK(updates[0].getBlockIndex() == pindexB);
BOOST_CHECK_EQUAL(updates[0].getStatus(),		BOOST_CHECK_EQUAL(updates[0].getStatus(),
AvalancheBlockUpdate::Status::Finalized);		AvalancheBlockUpdate::Status::Finalized);
updates = {};		updates = {};

// There is nothing left to vote on.		// There is nothing left to vote on.
invs = AvalancheTest::getInvsForNextPoll(p);		invs = AvalancheTest::getInvsForNextPoll(p);
BOOST_CHECK_EQUAL(invs.size(), 0);		BOOST_CHECK_EQUAL(invs.size(), 0);

		CConnmanTest::ClearNodes();
		}

		BOOST_AUTO_TEST_CASE(poll_and_response) {
		AvalancheProcessor p(g_connman.get());

		std::vector<AvalancheBlockUpdate> updates;

		CBlock block = CreateAndProcessBlock({}, CScript());
		const uint256 blockHash = block.GetHash();
		const CBlockIndex *pindex = mapBlockIndex[blockHash];

		const Config &config = GetConfig();

		// There is no node to query.
		BOOST_CHECK_EQUAL(AvalancheTest::getSuitableNodeToQuery(p), -1);

		// Create a node that supports avalanche and one that doesn't.
		auto oldnode = ConnectNode(config, NODE_NONE, *peerLogic);
		auto avanode = ConnectNode(config, NODE_AVALANCHE, *peerLogic);
		NodeId avanodeid = avanode->GetId();

		// It returns the avalanche peer.
		BOOST_CHECK_EQUAL(AvalancheTest::getSuitableNodeToQuery(p), avanodeid);

		// Register a block and check it is added to the list of elements to poll.
		BOOST_CHECK(p.addBlockToReconcile(pindex));
		auto invs = AvalancheTest::getInvsForNextPoll(p);
		BOOST_CHECK_EQUAL(invs.size(), 1);
		BOOST_CHECK_EQUAL(invs[0].type, MSG_BLOCK);
		BOOST_CHECK(invs[0].hash == blockHash);

		// Trigger a poll on avanode.
		AvalancheTest::runEventLoop(p);

		// There is no more suitable peer available, so return nothing.
		BOOST_CHECK_EQUAL(AvalancheTest::getSuitableNodeToQuery(p), -1);

		// Respond to the request.
		AvalancheResponse resp = {0, {AvalancheVote(0, blockHash)}};
		BOOST_CHECK(p.registerVotes(avanode->GetId(), resp, updates));
		BOOST_CHECK_EQUAL(updates.size(), 0);

		// Now that avanode fullfilled his request, it is added back to the list of
		// queriable nodes.
		BOOST_CHECK_EQUAL(AvalancheTest::getSuitableNodeToQuery(p), avanodeid);

		// Sending a response when not polled fails.
		BOOST_CHECK(!p.registerVotes(avanode->GetId(), resp, updates));
		BOOST_CHECK_EQUAL(updates.size(), 0);

		// Trigger a poll on avanode.
		AvalancheTest::runEventLoop(p);
		BOOST_CHECK_EQUAL(AvalancheTest::getSuitableNodeToQuery(p), -1);

		// Sending responses that do not match the request also fails.
		// 1. Too many results.
		resp = {0, {AvalancheVote(0, blockHash), AvalancheVote(0, blockHash)}};
		AvalancheTest::runEventLoop(p);
		BOOST_CHECK(!p.registerVotes(avanode->GetId(), resp, updates));
		BOOST_CHECK_EQUAL(updates.size(), 0);
		BOOST_CHECK_EQUAL(AvalancheTest::getSuitableNodeToQuery(p), avanodeid);

		// 2. Not enough results.
		resp = {0, {}};
		AvalancheTest::runEventLoop(p);
		BOOST_CHECK(!p.registerVotes(avanode->GetId(), resp, updates));
		BOOST_CHECK_EQUAL(updates.size(), 0);
		BOOST_CHECK_EQUAL(AvalancheTest::getSuitableNodeToQuery(p), avanodeid);

		// 3. Do not match the poll.
		resp = {0, {AvalancheVote()}};
		AvalancheTest::runEventLoop(p);
		BOOST_CHECK(!p.registerVotes(avanode->GetId(), resp, updates));
		BOOST_CHECK_EQUAL(updates.size(), 0);
		BOOST_CHECK_EQUAL(AvalancheTest::getSuitableNodeToQuery(p), avanodeid);

		// Proper response gets processed and avanode is available again.
		resp = {0, {AvalancheVote(0, blockHash)}};
		AvalancheTest::runEventLoop(p);
		BOOST_CHECK(p.registerVotes(avanode->GetId(), resp, updates));
		BOOST_CHECK_EQUAL(updates.size(), 0);
		BOOST_CHECK_EQUAL(AvalancheTest::getSuitableNodeToQuery(p), avanodeid);

		// Making request for invalid nodes do not work.
		BOOST_CHECK(!p.registerVotes(avanode->GetId() + 1234, resp, updates));
		BOOST_CHECK_EQUAL(updates.size(), 0);

		CConnmanTest::ClearNodes();
}		}

BOOST_AUTO_TEST_CASE(event_loop) {		BOOST_AUTO_TEST_CASE(event_loop) {
AvalancheProcessor p;		AvalancheProcessor p(g_connman.get());
CScheduler s;		CScheduler s;

		CBlock block = CreateAndProcessBlock({}, CScript());
		const uint256 blockHash = block.GetHash();
		const CBlockIndex *pindex = mapBlockIndex[blockHash];

// Starting the event loop.		// Starting the event loop.
BOOST_CHECK(p.startEventLoop(s));		BOOST_CHECK(p.startEventLoop(s));

// There is one task planned in the next hour (our event loop).		// There is one task planned in the next hour (our event loop).
boost::chrono::system_clock::time_point start, stop;		boost::chrono::system_clock::time_point start, stop;
BOOST_CHECK_EQUAL(s.getQueueInfo(start, stop), 1);		BOOST_CHECK_EQUAL(s.getQueueInfo(start, stop), 1);

// Starting twice doesn't start it twice.		// Starting twice doesn't start it twice.
BOOST_CHECK(!p.startEventLoop(s));		BOOST_CHECK(!p.startEventLoop(s));

// Start the scheduler thread.		// Start the scheduler thread.
std::thread schedulerThread(std::bind(&CScheduler::serviceQueue, &s));		std::thread schedulerThread(std::bind(&CScheduler::serviceQueue, &s));

		// Create a node and a block to query.
		const Config &config = GetConfig();

		// Create a node that supports avalanche.
		auto avanode = ConnectNode(config, NODE_AVALANCHE, *peerLogic);
		NodeId nodeid = avanode->GetId();

		// There is no query in flight at the moment.
		BOOST_CHECK_EQUAL(AvalancheTest::getSuitableNodeToQuery(p), nodeid);

		// Add a new block. Check it is added to the polls.
		BOOST_CHECK(p.addBlockToReconcile(pindex));

		bool hasQueried = false;
		for (int i = 0; i < 1000; i++) {
		// Technically, this is a race condition, but this should do just fine
		// as we wait up to 1s for an event that should take 10ms.
		boost::this_thread::sleep_for(boost::chrono::milliseconds(1));
		if (AvalancheTest::getSuitableNodeToQuery(p) == -1) {
		hasQueried = true;
		break;
		}
		}

		BOOST_CHECK(hasQueried);

// Stop event loop.		// Stop event loop.
BOOST_CHECK(p.stopEventLoop());		BOOST_CHECK(p.stopEventLoop());

// We don't have any task scheduled anymore.		// We don't have any task scheduled anymore.
BOOST_CHECK_EQUAL(s.getQueueInfo(start, stop), 0);		BOOST_CHECK_EQUAL(s.getQueueInfo(start, stop), 0);

// Can't stop the event loop twice.		// Can't stop the event loop twice.
BOOST_CHECK(!p.stopEventLoop());		BOOST_CHECK(!p.stopEventLoop());

// Wait for the scheduler to stop.		// Wait for the scheduler to stop.
s.stop(true);		s.stop(true);
schedulerThread.join();		schedulerThread.join();

		CConnmanTest::ClearNodes();
}		}

BOOST_AUTO_TEST_CASE(destructor) {		BOOST_AUTO_TEST_CASE(destructor) {
CScheduler s;		CScheduler s;
boost::chrono::system_clock::time_point start, stop;		boost::chrono::system_clock::time_point start, stop;

// Start the scheduler thread.		// Start the scheduler thread.
std::thread schedulerThread(std::bind(&CScheduler::serviceQueue, &s));		std::thread schedulerThread(std::bind(&CScheduler::serviceQueue, &s));

{		{
AvalancheProcessor p;		AvalancheProcessor p(g_connman.get());
BOOST_CHECK(p.startEventLoop(s));		BOOST_CHECK(p.startEventLoop(s));
BOOST_CHECK_EQUAL(s.getQueueInfo(start, stop), 1);		BOOST_CHECK_EQUAL(s.getQueueInfo(start, stop), 1);
}		}

// Now that avalanche is destroyed, there is no more scheduled tasks.		// Now that avalanche is destroyed, there is no more scheduled tasks.
BOOST_CHECK_EQUAL(s.getQueueInfo(start, stop), 0);		BOOST_CHECK_EQUAL(s.getQueueInfo(start, stop), 0);

// Wait for the scheduler to stop.		// Wait for the scheduler to stop.
s.stop(true);		s.stop(true);
schedulerThread.join();		schedulerThread.join();
}		}

BOOST_AUTO_TEST_SUITE_END()		BOOST_AUTO_TEST_SUITE_END()