org.eclipse.jgit.test/tst/org/eclipse/jgit/transport/TestProtocolTest.java - jgit - Git at Google

 /*
  * Copyright (C) 2015, Google Inc. and others
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Distribution License v. 1.0 which is available at
  * https://www.eclipse.org/org/documents/edl-v10.php.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */

 package org.eclipse.jgit.transport;

 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;

 import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.atomic.AtomicInteger;

 import org.eclipse.jgit.api.Git;
 import org.eclipse.jgit.api.errors.InvalidRemoteException;
 import org.eclipse.jgit.api.errors.TransportException;
 import org.eclipse.jgit.internal.JGitText;
 import org.eclipse.jgit.internal.storage.dfs.DfsRepositoryDescription;
 import org.eclipse.jgit.internal.storage.dfs.InMemoryRepository;
 import org.eclipse.jgit.junit.TestRepository;
 import org.eclipse.jgit.lib.AnyObjectId;
 import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.lib.ObjectId;
 import org.eclipse.jgit.lib.RefUpdate;
 import org.eclipse.jgit.lib.Repository;
 import org.eclipse.jgit.revwalk.RevCommit;
 import org.eclipse.jgit.revwalk.RevTag;
 import org.eclipse.jgit.revwalk.RevWalk;
 import org.eclipse.jgit.storage.pack.PackStatistics;
 import org.eclipse.jgit.transport.BasePackFetchConnection.FetchConfig;
 import org.eclipse.jgit.transport.resolver.ReceivePackFactory;
 import org.eclipse.jgit.transport.resolver.ServiceNotAuthorizedException;
 import org.eclipse.jgit.transport.resolver.UploadPackFactory;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;

 public class TestProtocolTest {
 	private static final RefSpec HEADS = new RefSpec("+refs/heads/*:refs/heads/*");

 	private static final RefSpec MASTER = new RefSpec(
 			"+refs/heads/master:refs/heads/master");

 	private static final int HAVES_PER_ROUND = 32;
 	private static final int MAX_HAVES = 256;

 	private static class User {
 		private final String name;

 		private User(String name) {
 			this.name = name;
 		}
 	}

 	private static class DefaultUpload implements UploadPackFactory<User> {
 		@Override
 		public UploadPack create(User req, Repository db) {
 			UploadPack up = new UploadPack(db);
 			up.setPostUploadHook((PackStatistics stats) -> {
 				havesCount = stats.getHaves();
 			});
 			return up;
 		}
 	}

 	private static class DefaultReceive implements ReceivePackFactory<User> {
 		@Override
 		public ReceivePack create(User req, Repository db) {
 			return new ReceivePack(db);
 		}
 	}

 	private static long havesCount;

 	private List<TransportProtocol> protos;
 	private TestRepository<InMemoryRepository> local;
 	private TestRepository<InMemoryRepository> remote;

   @Before
 	public void setUp() throws Exception {
 		protos = new ArrayList<>();
 		local = new TestRepository<>(
 				new InMemoryRepository(new DfsRepositoryDescription("local")));
 		remote = new TestRepository<>(
 				new InMemoryRepository(new DfsRepositoryDescription("remote")));
   }

 	@After
 	public void tearDown() {
 		for (TransportProtocol proto : protos) {
 			Transport.unregister(proto);
 		}
 	}

 	@Test
 	public void testFetch() throws Exception {
 		ObjectId master = remote.branch("master").commit().create();

 		TestProtocol<User> proto = registerDefault();
 		URIish uri = proto.register(new User("user"), remote.getRepository());

 		try (Git git = new Git(local.getRepository())) {
 			git.fetch()
 					.setRemote(uri.toString())
 					.setRefSpecs(HEADS)
 					.call();
 			assertEquals(master,
 					local.getRepository().exactRef("refs/heads/master").getObjectId());
 		}
 	}

 	@Test
 	public void fetchReportsLockFailureWhenAutoFollowTagIsCreated()
 			throws Exception {
 		String tagName = "foo";
 		String tagRef = "refs/tags/" + tagName;
 		String remoteBranchName = "remotefoo";
 		String forcedRemoteRef = "+refs/heads/" + remoteBranchName;

 		RevCommit localCommit = local.commit().add("local.txt", "new").create();
 		RevCommit remoteCommit = remote.branch(remoteBranchName).commit()
 				.add("remote.txt", "remote").create();
 		RevTag remoteTag = remote.tag("foo", remoteCommit);
 		remote.update(tagRef, remoteTag);

 		URIish uri = registerTestProtocolUpdatingRef((repo) -> repo.lightweightTag(tagName, localCommit));


 		try (Git git = new Git(local.getRepository())) {
 			FetchResult result = git.fetch().setRemote(uri.toString())
 					.setRefSpecs(new RefSpec(forcedRemoteRef
 							+ ":refs/remotes/origin/" + remoteBranchName))
 					.setTagOpt(TagOpt.AUTO_FOLLOW).call();

 			TrackingRefUpdate update = result.getTrackingRefUpdate(tagRef);
 			assertEquals(RefUpdate.Result.LOCK_FAILURE, update.getResult());
 			// Tag hasn't been clobbered...
 			assertEquals(localCommit,
 					local.getRepository().exactRef(tagRef).getObjectId());
 			// ...however the object has been downloaded
 			assertTrue(local.getRepository().getObjectDatabase()
 					.has(remoteCommit));
 		}
 	}

 	@Test
 	public void fetchReportsLockFailureWhenDestinationRefChanges()
 			throws Exception {
 		String localBranchName = "localfoo";
 		String localRef = "refs/heads/" + localBranchName;
 		String remoteBranchName = "remotefoo";
 		String forcedRemoteRef = "+refs/heads/" + remoteBranchName;

 		RevCommit oldLocalCommit = local.branch(localBranchName).commit()
 				.add("local.txt", "old").create();
 		RevCommit newLocalCommit = local.commit().parent(oldLocalCommit)
 				.add("local.txt", "new").create();
 		RevCommit remoteCommit = remote.branch(remoteBranchName).commit()
 				.add("remote.txt", "remote").create();

 		URIish uri = registerTestProtocolUpdatingRef((repo) -> repo.update(localBranchName, newLocalCommit));

 		try (Git git = new Git(local.getRepository())) {
 			FetchResult result = git.fetch().setRemote(uri.toString())
 					.setRefSpecs(
 							new RefSpec(forcedRemoteRef + ":" + localRef))
 					.call();

 			TrackingRefUpdate update = result.getTrackingRefUpdate(localRef);
 			assertEquals(RefUpdate.Result.LOCK_FAILURE, update.getResult());
 			// Ref hasn't been clobbered...
 			assertEquals(newLocalCommit,
 					local.getRepository().exactRef(localRef).getObjectId());
 			// ...however the object has been downloaded
 			assertTrue(local.getRepository().getObjectDatabase()
 					.has(remoteCommit));
 		}
 	}

 	@Test
 	public void fetchReportsLockFailureWhenDestinationRefIsCreated()
 			throws Exception {
 		String localBranchName = "localfoo";
 		String localRef = "refs/heads/" + localBranchName;
 		String remoteBranchName = "remotefoo";
 		String forcedRemoteRef = "+refs/heads/" + remoteBranchName;

 		RevCommit newLocalCommit = local.commit().add("local.txt", "new")
 				.create();
 		RevCommit remoteCommit = remote.branch(remoteBranchName).commit()
 				.add("remote.txt", "remote").create();

 		URIish uri = registerTestProtocolUpdatingRef((repo) -> repo.update(localBranchName, newLocalCommit));

 		try (Git git = new Git(local.getRepository())) {
 			FetchResult result = git.fetch().setRemote(uri.toString())
 					.setRefSpecs(
 							new RefSpec(forcedRemoteRef + ":" + localRef))
 					.call();

 			TrackingRefUpdate update = result.getTrackingRefUpdate(localRef);
 			assertEquals(RefUpdate.Result.LOCK_FAILURE, update.getResult());
 			// Ref hasn't been clobbered...
 			assertEquals(newLocalCommit,
 					local.getRepository().exactRef(localRef).getObjectId());
 			// ...however the object has been downloaded
 			assertTrue(local.getRepository().getObjectDatabase()
 					.has(remoteCommit));
 		}
 	}

 	@Test
 	public void testPush() throws Exception {
 		ObjectId master = local.branch("master").commit().create();

 		TestProtocol<User> proto = registerDefault();
 		URIish uri = proto.register(new User("user"), remote.getRepository());

 		try (Git git = new Git(local.getRepository())) {
 			git.push()
 					.setRemote(uri.toString())
 					.setRefSpecs(HEADS)
 					.call();
 			assertEquals(master,
 					remote.getRepository().exactRef("refs/heads/master").getObjectId());
 		}
 	}

 	@Test
 	public void testFullNegotiation() throws Exception {
 		TestProtocol<User> proto = registerDefault();
 		URIish uri = proto.register(new User("user"), remote.getRepository());

 		// Enough local branches to cause 10 rounds of negotiation,
 		// and a unique remote master branch commit with a later timestamp.
 		for (int i = 0; i < 10 * HAVES_PER_ROUND; i++) {
 			local.branch("local-branch-" + i).commit().create();
 		}
 		remote.tick(11 * HAVES_PER_ROUND);
 		RevCommit master = remote.branch("master").commit()
 				.add("readme.txt", "unique commit").create();

 		try (Git git = new Git(local.getRepository())) {
 			assertNull(local.getRepository().exactRef("refs/heads/master"));
 			git.fetch().setRemote(uri.toString()).setRefSpecs(MASTER).call();
 			assertEquals(master, local.getRepository()
 					.exactRef("refs/heads/master").getObjectId());
 			assertEquals(10 * HAVES_PER_ROUND, havesCount);
 		}
 	}

 	@Test
 	public void testMaxHaves() throws Exception {
 		TestProtocol<User> proto = registerDefault();
 		URIish uri = proto.register(new User("user"), remote.getRepository());

 		// Enough local branches to cause 10 rounds of negotiation,
 		// and a unique remote master branch commit with a later timestamp.
 		for (int i = 0; i < 10 * HAVES_PER_ROUND; i++) {
 			local.branch("local-branch-" + i).commit().create();
 		}
 		remote.tick(11 * HAVES_PER_ROUND);
 		RevCommit master = remote.branch("master").commit()
 				.add("readme.txt", "unique commit").create();

 		TestProtocol.setFetchConfig(new FetchConfig(true, MAX_HAVES));
 		try (Git git = new Git(local.getRepository())) {
 			assertNull(local.getRepository().exactRef("refs/heads/master"));
 			git.fetch().setRemote(uri.toString()).setRefSpecs(MASTER).call();
 			assertEquals(master, local.getRepository()
 					.exactRef("refs/heads/master").getObjectId());
 			assertTrue(havesCount <= MAX_HAVES);
 		}
 	}

 	@Test
 	public void testUploadPackFactory() throws Exception {
 		ObjectId master = remote.branch("master").commit().create();

 		final AtomicInteger rejected = new AtomicInteger();
 		TestProtocol<User> proto = registerProto((User req, Repository db) -> {
 			if (!"user2".equals(req.name)) {
 				rejected.incrementAndGet();
 				throw new ServiceNotAuthorizedException();
 			}
 			return new UploadPack(db);
 		}, new DefaultReceive());

 		// Same repository, different users.
 		URIish user1Uri = proto.register(new User("user1"), remote.getRepository());
 		URIish user2Uri = proto.register(new User("user2"), remote.getRepository());

 		try (Git git = new Git(local.getRepository())) {
 			try {
 				git.fetch()
 						.setRemote(user1Uri.toString())
 						.setRefSpecs(MASTER)
 						.call();
 				fail("accepted not permitted fetch");
 			} catch (InvalidRemoteException expected) {
 				// Expected.
 			}
 			assertEquals(1, rejected.get());
 			assertNull(local.getRepository().exactRef("refs/heads/master"));

 			git.fetch()
 					.setRemote(user2Uri.toString())
 					.setRefSpecs(MASTER)
 					.call();
 			assertEquals(1, rejected.get());
 			assertEquals(master,
 					local.getRepository().exactRef("refs/heads/master").getObjectId());
 		}
 	}

 	@Test
 	public void testReceivePackFactory() throws Exception {
 		ObjectId master = local.branch("master").commit().create();

 		final AtomicInteger rejected = new AtomicInteger();
 		TestProtocol<User> proto = registerProto(new DefaultUpload(),
 				(User req, Repository db) -> {
 					if (!"user2".equals(req.name)) {
 						rejected.incrementAndGet();
 						throw new ServiceNotAuthorizedException();
 					}
 					return new ReceivePack(db);
 				});

 		// Same repository, different users.
 		URIish user1Uri = proto.register(new User("user1"), remote.getRepository());
 		URIish user2Uri = proto.register(new User("user2"), remote.getRepository());

 		try (Git git = new Git(local.getRepository())) {
 			try {
 				git.push()
 						.setRemote(user1Uri.toString())
 						.setRefSpecs(HEADS)
 						.call();
 				fail("accepted not permitted push");
 			} catch (TransportException expected) {
 				assertTrue(expected.getMessage().contains(
 						JGitText.get().pushNotPermitted));
 			}
 			assertEquals(1, rejected.get());
 			assertNull(remote.getRepository().exactRef("refs/heads/master"));

 			git.push()
 					.setRemote(user2Uri.toString())
 					.setRefSpecs(HEADS)
 					.call();
 			assertEquals(1, rejected.get());
 			assertEquals(master,
 					remote.getRepository().exactRef("refs/heads/master").getObjectId());
 		}
 	}

 	@Test
 	public void nonForcedFetchRejectedWithConcurrentLocalRefUpdate()
 		throws Exception {
 		String localRef = Constants.R_HEADS + "localfoo";
 		String remoteBranchName = "remotefoo";
 		String nonForcedRemoteRef = Constants.R_HEADS + remoteBranchName;

 		try (Repository repository = local.getRepository();
 			Git git = new Git(repository);
 			RevWalk revWalk = local.getRevWalk()) {
 			RefSpec nonForcedFetchRefSpec = new RefSpec(
 				nonForcedRemoteRef + ":" + localRef);
 			RevCommit oldLocalCommit = remote.branch(remoteBranchName)
 				.commit().add("base.txt", "base").create();

 			git.fetch().setRemote(registerDefaultTestProtocol().toString()).setRefSpecs(nonForcedFetchRefSpec)
 				.call();
 			assertEquals(oldLocalCommit, repository.exactRef(localRef).getObjectId());

 			RevCommit updatedLocalCommit = local.commit()
 				.parent(revWalk.parseCommit(oldLocalCommit))
 				.add("local.txt", "new").create();
 			RevCommit remoteCommit = remote.commit().parent(oldLocalCommit)
 				.add("remote.txt", "remote").create();
 			remote.update(remoteBranchName, remoteCommit);

 			URIish uri = registerTestProtocolUpdatingRef((repo) -> repo.update(localRef, updatedLocalCommit));
 			FetchResult result = git.fetch().setRemote(uri.toString())
 				.setRefSpecs(nonForcedFetchRefSpec).call();

 			// Fetch has been rejected (non-ff)
 			TrackingRefUpdate update = result.getTrackingRefUpdate(localRef);
 			assertEquals(RefUpdate.Result.REJECTED, update.getResult());

 			// Fetched object has been downloaded
 			assertTrue(repository.getObjectDatabase()
 				.has(remoteCommit));
 			// ... but the local ref has not been altered
 			assertEquals(updatedLocalCommit,
 				repository.exactRef(localRef).getObjectId());
 		}
 	}

 	@Test
 	public void forcedFetchReportsLockFailureWhenDestinationRefIsDeleted()
 			throws Exception {
 		String localBranchName = "localfoo";
 		String localRef = Constants.R_HEADS + localBranchName;
 		String remoteBranchName = "remotefoo";
 		String forcedRemoteRef = "+" + Constants.R_HEADS + remoteBranchName;

 		local.branch(localBranchName).commit()
 				.add("local.txt", "old").create();
 		RevCommit remoteCommit = remote.branch(remoteBranchName).commit()
 				.add("remote.txt", "remote").create();

 		URIish uri = registerTestProtocolUpdatingRef((repo) -> {
 			RefUpdate refUpdate = repo.getRepository().updateRef(localRef);
 			refUpdate.setForceUpdate(true);
 			refUpdate.delete();
 		});

 		try (Git git = new Git(local.getRepository())) {
 			FetchResult result = git.fetch()
 					.setRemote(uri.toString())
 					.setRefSpecs(new RefSpec(forcedRemoteRef + ":" + localRef))
 					.call();

 			TrackingRefUpdate update = result.getTrackingRefUpdate(localRef);
 			assertEquals(RefUpdate.Result.LOCK_FAILURE, update.getResult());
 			assertNull(local.getRepository().exactRef(localRef));
 			assertTrue(local.getRepository().getObjectDatabase()
 					.has(remoteCommit));
 		}
 	}

 	@Test
 	public void forcedFetchReportsLockFailureWhenDestinationRefAlreadyHasNewId()
 			throws Exception {
 		String localBranchName = "localfoo";
 		String localRef = Constants.R_HEADS + localBranchName;
 		String remoteBranchName = "remotefoo";
 		String forcedRemoteRef = "+" + Constants.R_HEADS + remoteBranchName;
 		String tmpRef = Constants.R_HEADS + "tmp";

 		RevCommit oldLocalCommit = local.branch(localBranchName).commit()
 				.add("local.txt", "old").create();
 		RevCommit remoteCommit = remote.branch(remoteBranchName).commit()
 				.add("remote.txt", "remote").create();

 		try (Git git = new Git(local.getRepository())) {
 			// Pre-fetch the remote object into the local object database so the
 			// simulated concurrent local update can point at it.
 			git.fetch().setRemote(registerDefaultTestProtocol().toString())
 					.setRefSpecs(new RefSpec(forcedRemoteRef + ":" + tmpRef))
 					.call();

 			local.update(localRef, oldLocalCommit);

 			URIish uri = registerTestProtocolUpdatingRef(
 					(repo) -> repo.update(localRef, remoteCommit));

 			FetchResult result = git.fetch().setRemote(uri.toString())
 					.setRefSpecs(new RefSpec(forcedRemoteRef + ":" + localRef))
 					.call();

 			TrackingRefUpdate update = result.getTrackingRefUpdate(localRef);
 			assertEquals(RefUpdate.Result.LOCK_FAILURE, update.getResult());
 			assertEquals(remoteCommit,
 					local.getRepository().exactRef(localRef).getObjectId());
 		}
 	}

 	@Test
 	public void nonForcedFetchReportsLockFailureWhenConcurrentUpdateIsFastForward()
 			throws Exception {
 		String localBranchName = "localfoo";
 		String localRef = Constants.R_HEADS + localBranchName;
 		String remoteBranchName = "remotefoo";
 		String nonForcedRemoteRef = Constants.R_HEADS + remoteBranchName;
 		String tmpRef = "refs/heads/tmp";

 		RevCommit baseCommit = remote.branch(remoteBranchName).commit()
 				.add("base.txt", "base").create();
 		RevCommit updatedLocalCommit = remote.commit().parent(baseCommit)
 				.add("local.txt", "local").create();
 		RevCommit remoteCommit = remote.commit().parent(updatedLocalCommit)
 				.add("remote.txt", "remote").create();
 		remote.update(remoteBranchName, remoteCommit);

 		try (Git git = new Git(local.getRepository())) {
 			git.fetch().setRemote(registerDefaultTestProtocol().toString())
 					.setRefSpecs(new RefSpec(nonForcedRemoteRef + ":" + tmpRef))
 					.call();

 			local.update(localRef, baseCommit);

 			URIish uri = registerTestProtocolUpdatingRef(
 					(repo) -> repo.update(localRef, updatedLocalCommit));

 			FetchResult result = git.fetch().setRemote(uri.toString())
 					.setRefSpecs(new RefSpec(nonForcedRemoteRef + ":" + localRef))
 					.call();

 			TrackingRefUpdate update = result.getTrackingRefUpdate(localRef);
 			assertEquals(RefUpdate.Result.LOCK_FAILURE, update.getResult());
 			assertEquals(updatedLocalCommit,
 					local.getRepository().exactRef(localRef).getObjectId());
 			assertTrue(local.getRepository().getObjectDatabase()
 					.has(remoteCommit));
 		}
 	}

 	@Test
 	public void nonForcedFetchRejectedWhenCurrentRefUnchangedButNonFastForward()
 			throws Exception {
 		String localBranchName = "localfoo";
 		String localRef = Constants.R_HEADS + localBranchName;
 		String remoteBranchName = "remotefoo";
 		String nonForcedRemoteRef = Constants.R_HEADS + remoteBranchName;

 		RevCommit localCommit = local.branch(localBranchName).commit()
 				.add("local.txt", "local").create();
 		RevCommit remoteCommit = remote.branch(remoteBranchName).commit()
 				.add("remote.txt", "remote").create();

 		try (Git git = new Git(local.getRepository())) {
 			FetchResult result = git.fetch()
 					.setRemote(registerDefaultTestProtocol().toString())
 					.setRefSpecs(
 							new RefSpec(nonForcedRemoteRef + ":" + localRef))
 					.call();

 			TrackingRefUpdate update = result.getTrackingRefUpdate(localRef);
 			assertEquals(RefUpdate.Result.REJECTED, update.getResult());
 			assertEquals(localCommit,
 					local.getRepository().exactRef(localRef).getObjectId());
 			assertTrue(local.getRepository().getObjectDatabase()
 					.has(remoteCommit));
 		}
 	}

 	private TestProtocol<User> registerDefault() {
 		return registerProto(new DefaultUpload(), new DefaultReceive());
 	}

 	private TestProtocol<User> registerProto(UploadPackFactory<User> upf,
 			ReceivePackFactory<User> rpf) {
 		TestProtocol<User> proto = new TestProtocol<>(upf, rpf);
 		protos.add(proto);
 		Transport.register(proto);
 		return proto;
 	}

 	@FunctionalInterface
 	interface TestRepositoryUpdateFunc {
 		void call(TestRepository<InMemoryRepository> repository) throws Exception;
 	}

 	private <T extends AnyObjectId> URIish registerTestProtocolUpdatingRef(TestRepositoryUpdateFunc repositoryUpdateFunc) {
 		TestProtocol<User> proto = registerProto((User req, Repository db) -> {
 			try {
 				repositoryUpdateFunc.call(local);
 			} catch (Exception e) {
 				throw new AssertionError("Cannot update local ref", e);
 			}
 			return new UploadPack(db);
 		}, new DefaultReceive());
 		return proto.register(new User("user"), remote.getRepository());
 	}

 	private URIish registerDefaultTestProtocol() {
 		TestProtocol<User> setupProto = registerDefault();
 		return setupProto.register(new User("user"), remote.getRepository());
 	}
 }
	/*
	* Copyright (C) 2015, Google Inc. and others
	*
	* This program and the accompanying materials are made available under the
	* terms of the Eclipse Distribution License v. 1.0 which is available at
	* https://www.eclipse.org/org/documents/edl-v10.php.
	*
	* SPDX-License-Identifier: BSD-3-Clause
	*/

	package org.eclipse.jgit.transport;

	import static org.junit.Assert.assertEquals;
	import static org.junit.Assert.assertNull;
	import static org.junit.Assert.assertTrue;
	import static org.junit.Assert.fail;

	import java.util.ArrayList;
	import java.util.List;
	import java.util.concurrent.atomic.AtomicInteger;

	import org.eclipse.jgit.api.Git;
	import org.eclipse.jgit.api.errors.InvalidRemoteException;
	import org.eclipse.jgit.api.errors.TransportException;
	import org.eclipse.jgit.internal.JGitText;
	import org.eclipse.jgit.internal.storage.dfs.DfsRepositoryDescription;
	import org.eclipse.jgit.internal.storage.dfs.InMemoryRepository;
	import org.eclipse.jgit.junit.TestRepository;
	import org.eclipse.jgit.lib.AnyObjectId;
	import org.eclipse.jgit.lib.Constants;
	import org.eclipse.jgit.lib.ObjectId;
	import org.eclipse.jgit.lib.RefUpdate;
	import org.eclipse.jgit.lib.Repository;
	import org.eclipse.jgit.revwalk.RevCommit;
	import org.eclipse.jgit.revwalk.RevTag;
	import org.eclipse.jgit.revwalk.RevWalk;
	import org.eclipse.jgit.storage.pack.PackStatistics;
	import org.eclipse.jgit.transport.BasePackFetchConnection.FetchConfig;
	import org.eclipse.jgit.transport.resolver.ReceivePackFactory;
	import org.eclipse.jgit.transport.resolver.ServiceNotAuthorizedException;
	import org.eclipse.jgit.transport.resolver.UploadPackFactory;
	import org.junit.After;
	import org.junit.Before;
	import org.junit.Test;

	public class TestProtocolTest {
	private static final RefSpec HEADS = new RefSpec("+refs/heads/:refs/heads/");

	private static final RefSpec MASTER = new RefSpec(
	"+refs/heads/master:refs/heads/master");

	private static final int HAVES_PER_ROUND = 32;
	private static final int MAX_HAVES = 256;

	private static class User {
	private final String name;

	private User(String name) {
	this.name = name;
	}
	}

	private static class DefaultUpload implements UploadPackFactory<User> {
	@Override
	public UploadPack create(User req, Repository db) {
	UploadPack up = new UploadPack(db);
	up.setPostUploadHook((PackStatistics stats) -> {
	havesCount = stats.getHaves();
	});
	return up;
	}
	}

	private static class DefaultReceive implements ReceivePackFactory<User> {
	@Override
	public ReceivePack create(User req, Repository db) {
	return new ReceivePack(db);
	}
	}

	private static long havesCount;

	private List<TransportProtocol> protos;
	private TestRepository<InMemoryRepository> local;
	private TestRepository<InMemoryRepository> remote;

	@Before
	public void setUp() throws Exception {
	protos = new ArrayList<>();
	local = new TestRepository<>(
	new InMemoryRepository(new DfsRepositoryDescription("local")));
	remote = new TestRepository<>(
	new InMemoryRepository(new DfsRepositoryDescription("remote")));
	}

	@After
	public void tearDown() {
	for (TransportProtocol proto : protos) {
	Transport.unregister(proto);
	}
	}

	@Test
	public void testFetch() throws Exception {
	ObjectId master = remote.branch("master").commit().create();

	TestProtocol<User> proto = registerDefault();
	URIish uri = proto.register(new User("user"), remote.getRepository());

	try (Git git = new Git(local.getRepository())) {
	git.fetch()
	.setRemote(uri.toString())
	.setRefSpecs(HEADS)
	.call();
	assertEquals(master,
	local.getRepository().exactRef("refs/heads/master").getObjectId());
	}
	}

	@Test
	public void fetchReportsLockFailureWhenAutoFollowTagIsCreated()
	throws Exception {
	String tagName = "foo";
	String tagRef = "refs/tags/" + tagName;
	String remoteBranchName = "remotefoo";
	String forcedRemoteRef = "+refs/heads/" + remoteBranchName;

	RevCommit localCommit = local.commit().add("local.txt", "new").create();
	RevCommit remoteCommit = remote.branch(remoteBranchName).commit()
	.add("remote.txt", "remote").create();
	RevTag remoteTag = remote.tag("foo", remoteCommit);
	remote.update(tagRef, remoteTag);

	URIish uri = registerTestProtocolUpdatingRef((repo) -> repo.lightweightTag(tagName, localCommit));


	try (Git git = new Git(local.getRepository())) {
	FetchResult result = git.fetch().setRemote(uri.toString())
	.setRefSpecs(new RefSpec(forcedRemoteRef
	+ ":refs/remotes/origin/" + remoteBranchName))
	.setTagOpt(TagOpt.AUTO_FOLLOW).call();

	TrackingRefUpdate update = result.getTrackingRefUpdate(tagRef);
	assertEquals(RefUpdate.Result.LOCK_FAILURE, update.getResult());
	// Tag hasn't been clobbered...
	assertEquals(localCommit,
	local.getRepository().exactRef(tagRef).getObjectId());
	// ...however the object has been downloaded
	assertTrue(local.getRepository().getObjectDatabase()
	.has(remoteCommit));
	}
	}

	@Test
	public void fetchReportsLockFailureWhenDestinationRefChanges()
	throws Exception {
	String localBranchName = "localfoo";
	String localRef = "refs/heads/" + localBranchName;
	String remoteBranchName = "remotefoo";
	String forcedRemoteRef = "+refs/heads/" + remoteBranchName;

	RevCommit oldLocalCommit = local.branch(localBranchName).commit()
	.add("local.txt", "old").create();
	RevCommit newLocalCommit = local.commit().parent(oldLocalCommit)
	.add("local.txt", "new").create();
	RevCommit remoteCommit = remote.branch(remoteBranchName).commit()
	.add("remote.txt", "remote").create();

	URIish uri = registerTestProtocolUpdatingRef((repo) -> repo.update(localBranchName, newLocalCommit));

	try (Git git = new Git(local.getRepository())) {
	FetchResult result = git.fetch().setRemote(uri.toString())
	.setRefSpecs(
	new RefSpec(forcedRemoteRef + ":" + localRef))
	.call();

	TrackingRefUpdate update = result.getTrackingRefUpdate(localRef);
	assertEquals(RefUpdate.Result.LOCK_FAILURE, update.getResult());
	// Ref hasn't been clobbered...
	assertEquals(newLocalCommit,
	local.getRepository().exactRef(localRef).getObjectId());
	// ...however the object has been downloaded
	assertTrue(local.getRepository().getObjectDatabase()
	.has(remoteCommit));
	}
	}

	@Test
	public void fetchReportsLockFailureWhenDestinationRefIsCreated()
	throws Exception {
	String localBranchName = "localfoo";
	String localRef = "refs/heads/" + localBranchName;
	String remoteBranchName = "remotefoo";
	String forcedRemoteRef = "+refs/heads/" + remoteBranchName;

	RevCommit newLocalCommit = local.commit().add("local.txt", "new")
	.create();
	RevCommit remoteCommit = remote.branch(remoteBranchName).commit()
	.add("remote.txt", "remote").create();

	URIish uri = registerTestProtocolUpdatingRef((repo) -> repo.update(localBranchName, newLocalCommit));

	try (Git git = new Git(local.getRepository())) {
	FetchResult result = git.fetch().setRemote(uri.toString())
	.setRefSpecs(
	new RefSpec(forcedRemoteRef + ":" + localRef))
	.call();

	TrackingRefUpdate update = result.getTrackingRefUpdate(localRef);
	assertEquals(RefUpdate.Result.LOCK_FAILURE, update.getResult());
	// Ref hasn't been clobbered...
	assertEquals(newLocalCommit,
	local.getRepository().exactRef(localRef).getObjectId());
	// ...however the object has been downloaded
	assertTrue(local.getRepository().getObjectDatabase()
	.has(remoteCommit));
	}
	}

	@Test
	public void testPush() throws Exception {
	ObjectId master = local.branch("master").commit().create();

	TestProtocol<User> proto = registerDefault();
	URIish uri = proto.register(new User("user"), remote.getRepository());

	try (Git git = new Git(local.getRepository())) {
	git.push()
	.setRemote(uri.toString())
	.setRefSpecs(HEADS)
	.call();
	assertEquals(master,
	remote.getRepository().exactRef("refs/heads/master").getObjectId());
	}
	}

	@Test
	public void testFullNegotiation() throws Exception {
	TestProtocol<User> proto = registerDefault();
	URIish uri = proto.register(new User("user"), remote.getRepository());

	// Enough local branches to cause 10 rounds of negotiation,
	// and a unique remote master branch commit with a later timestamp.
	for (int i = 0; i < 10 * HAVES_PER_ROUND; i++) {
	local.branch("local-branch-" + i).commit().create();
	}
	remote.tick(11 * HAVES_PER_ROUND);
	RevCommit master = remote.branch("master").commit()
	.add("readme.txt", "unique commit").create();

	try (Git git = new Git(local.getRepository())) {
	assertNull(local.getRepository().exactRef("refs/heads/master"));
	git.fetch().setRemote(uri.toString()).setRefSpecs(MASTER).call();
	assertEquals(master, local.getRepository()
	.exactRef("refs/heads/master").getObjectId());
	assertEquals(10 * HAVES_PER_ROUND, havesCount);
	}
	}

	@Test
	public void testMaxHaves() throws Exception {
	TestProtocol<User> proto = registerDefault();
	URIish uri = proto.register(new User("user"), remote.getRepository());

	// Enough local branches to cause 10 rounds of negotiation,
	// and a unique remote master branch commit with a later timestamp.
	for (int i = 0; i < 10 * HAVES_PER_ROUND; i++) {
	local.branch("local-branch-" + i).commit().create();
	}
	remote.tick(11 * HAVES_PER_ROUND);
	RevCommit master = remote.branch("master").commit()
	.add("readme.txt", "unique commit").create();

	TestProtocol.setFetchConfig(new FetchConfig(true, MAX_HAVES));
	try (Git git = new Git(local.getRepository())) {
	assertNull(local.getRepository().exactRef("refs/heads/master"));
	git.fetch().setRemote(uri.toString()).setRefSpecs(MASTER).call();
	assertEquals(master, local.getRepository()
	.exactRef("refs/heads/master").getObjectId());
	assertTrue(havesCount <= MAX_HAVES);
	}
	}

	@Test
	public void testUploadPackFactory() throws Exception {
	ObjectId master = remote.branch("master").commit().create();

	final AtomicInteger rejected = new AtomicInteger();
	TestProtocol<User> proto = registerProto((User req, Repository db) -> {
	if (!"user2".equals(req.name)) {
	rejected.incrementAndGet();
	throw new ServiceNotAuthorizedException();
	}
	return new UploadPack(db);
	}, new DefaultReceive());

	// Same repository, different users.
	URIish user1Uri = proto.register(new User("user1"), remote.getRepository());
	URIish user2Uri = proto.register(new User("user2"), remote.getRepository());

	try (Git git = new Git(local.getRepository())) {
	try {
	git.fetch()
	.setRemote(user1Uri.toString())
	.setRefSpecs(MASTER)
	.call();
	fail("accepted not permitted fetch");
	} catch (InvalidRemoteException expected) {
	// Expected.
	}
	assertEquals(1, rejected.get());
	assertNull(local.getRepository().exactRef("refs/heads/master"));

	git.fetch()
	.setRemote(user2Uri.toString())
	.setRefSpecs(MASTER)
	.call();
	assertEquals(1, rejected.get());
	assertEquals(master,
	local.getRepository().exactRef("refs/heads/master").getObjectId());
	}
	}

	@Test
	public void testReceivePackFactory() throws Exception {
	ObjectId master = local.branch("master").commit().create();

	final AtomicInteger rejected = new AtomicInteger();
	TestProtocol<User> proto = registerProto(new DefaultUpload(),
	(User req, Repository db) -> {
	if (!"user2".equals(req.name)) {
	rejected.incrementAndGet();
	throw new ServiceNotAuthorizedException();
	}
	return new ReceivePack(db);
	});

	// Same repository, different users.
	URIish user1Uri = proto.register(new User("user1"), remote.getRepository());
	URIish user2Uri = proto.register(new User("user2"), remote.getRepository());

	try (Git git = new Git(local.getRepository())) {
	try {
	git.push()
	.setRemote(user1Uri.toString())
	.setRefSpecs(HEADS)
	.call();
	fail("accepted not permitted push");
	} catch (TransportException expected) {
	assertTrue(expected.getMessage().contains(
	JGitText.get().pushNotPermitted));
	}
	assertEquals(1, rejected.get());
	assertNull(remote.getRepository().exactRef("refs/heads/master"));

	git.push()
	.setRemote(user2Uri.toString())
	.setRefSpecs(HEADS)
	.call();
	assertEquals(1, rejected.get());
	assertEquals(master,
	remote.getRepository().exactRef("refs/heads/master").getObjectId());
	}
	}

	@Test
	public void nonForcedFetchRejectedWithConcurrentLocalRefUpdate()
	throws Exception {
	String localRef = Constants.R_HEADS + "localfoo";
	String remoteBranchName = "remotefoo";
	String nonForcedRemoteRef = Constants.R_HEADS + remoteBranchName;

	try (Repository repository = local.getRepository();
	Git git = new Git(repository);
	RevWalk revWalk = local.getRevWalk()) {
	RefSpec nonForcedFetchRefSpec = new RefSpec(
	nonForcedRemoteRef + ":" + localRef);
	RevCommit oldLocalCommit = remote.branch(remoteBranchName)
	.commit().add("base.txt", "base").create();

	git.fetch().setRemote(registerDefaultTestProtocol().toString()).setRefSpecs(nonForcedFetchRefSpec)
	.call();
	assertEquals(oldLocalCommit, repository.exactRef(localRef).getObjectId());

	RevCommit updatedLocalCommit = local.commit()
	.parent(revWalk.parseCommit(oldLocalCommit))
	.add("local.txt", "new").create();
	RevCommit remoteCommit = remote.commit().parent(oldLocalCommit)
	.add("remote.txt", "remote").create();
	remote.update(remoteBranchName, remoteCommit);

	URIish uri = registerTestProtocolUpdatingRef((repo) -> repo.update(localRef, updatedLocalCommit));
	FetchResult result = git.fetch().setRemote(uri.toString())
	.setRefSpecs(nonForcedFetchRefSpec).call();

	// Fetch has been rejected (non-ff)
	TrackingRefUpdate update = result.getTrackingRefUpdate(localRef);
	assertEquals(RefUpdate.Result.REJECTED, update.getResult());

	// Fetched object has been downloaded
	assertTrue(repository.getObjectDatabase()
	.has(remoteCommit));
	// ... but the local ref has not been altered
	assertEquals(updatedLocalCommit,
	repository.exactRef(localRef).getObjectId());
	}
	}

	@Test
	public void forcedFetchReportsLockFailureWhenDestinationRefIsDeleted()
	throws Exception {
	String localBranchName = "localfoo";
	String localRef = Constants.R_HEADS + localBranchName;
	String remoteBranchName = "remotefoo";
	String forcedRemoteRef = "+" + Constants.R_HEADS + remoteBranchName;

	local.branch(localBranchName).commit()
	.add("local.txt", "old").create();
	RevCommit remoteCommit = remote.branch(remoteBranchName).commit()
	.add("remote.txt", "remote").create();

	URIish uri = registerTestProtocolUpdatingRef((repo) -> {
	RefUpdate refUpdate = repo.getRepository().updateRef(localRef);
	refUpdate.setForceUpdate(true);
	refUpdate.delete();
	});

	try (Git git = new Git(local.getRepository())) {
	FetchResult result = git.fetch()
	.setRemote(uri.toString())
	.setRefSpecs(new RefSpec(forcedRemoteRef + ":" + localRef))
	.call();

	TrackingRefUpdate update = result.getTrackingRefUpdate(localRef);
	assertEquals(RefUpdate.Result.LOCK_FAILURE, update.getResult());
	assertNull(local.getRepository().exactRef(localRef));
	assertTrue(local.getRepository().getObjectDatabase()
	.has(remoteCommit));
	}
	}

	@Test
	public void forcedFetchReportsLockFailureWhenDestinationRefAlreadyHasNewId()
	throws Exception {
	String localBranchName = "localfoo";
	String localRef = Constants.R_HEADS + localBranchName;
	String remoteBranchName = "remotefoo";
	String forcedRemoteRef = "+" + Constants.R_HEADS + remoteBranchName;
	String tmpRef = Constants.R_HEADS + "tmp";

	RevCommit oldLocalCommit = local.branch(localBranchName).commit()
	.add("local.txt", "old").create();
	RevCommit remoteCommit = remote.branch(remoteBranchName).commit()
	.add("remote.txt", "remote").create();

	try (Git git = new Git(local.getRepository())) {
	// Pre-fetch the remote object into the local object database so the
	// simulated concurrent local update can point at it.
	git.fetch().setRemote(registerDefaultTestProtocol().toString())
	.setRefSpecs(new RefSpec(forcedRemoteRef + ":" + tmpRef))
	.call();

	local.update(localRef, oldLocalCommit);

	URIish uri = registerTestProtocolUpdatingRef(
	(repo) -> repo.update(localRef, remoteCommit));

	FetchResult result = git.fetch().setRemote(uri.toString())
	.setRefSpecs(new RefSpec(forcedRemoteRef + ":" + localRef))
	.call();

	TrackingRefUpdate update = result.getTrackingRefUpdate(localRef);
	assertEquals(RefUpdate.Result.LOCK_FAILURE, update.getResult());
	assertEquals(remoteCommit,
	local.getRepository().exactRef(localRef).getObjectId());
	}
	}

	@Test
	public void nonForcedFetchReportsLockFailureWhenConcurrentUpdateIsFastForward()
	throws Exception {
	String localBranchName = "localfoo";
	String localRef = Constants.R_HEADS + localBranchName;
	String remoteBranchName = "remotefoo";
	String nonForcedRemoteRef = Constants.R_HEADS + remoteBranchName;
	String tmpRef = "refs/heads/tmp";

	RevCommit baseCommit = remote.branch(remoteBranchName).commit()
	.add("base.txt", "base").create();
	RevCommit updatedLocalCommit = remote.commit().parent(baseCommit)
	.add("local.txt", "local").create();
	RevCommit remoteCommit = remote.commit().parent(updatedLocalCommit)
	.add("remote.txt", "remote").create();
	remote.update(remoteBranchName, remoteCommit);

	try (Git git = new Git(local.getRepository())) {
	git.fetch().setRemote(registerDefaultTestProtocol().toString())
	.setRefSpecs(new RefSpec(nonForcedRemoteRef + ":" + tmpRef))
	.call();

	local.update(localRef, baseCommit);

	URIish uri = registerTestProtocolUpdatingRef(
	(repo) -> repo.update(localRef, updatedLocalCommit));

	FetchResult result = git.fetch().setRemote(uri.toString())
	.setRefSpecs(new RefSpec(nonForcedRemoteRef + ":" + localRef))
	.call();

	TrackingRefUpdate update = result.getTrackingRefUpdate(localRef);
	assertEquals(RefUpdate.Result.LOCK_FAILURE, update.getResult());
	assertEquals(updatedLocalCommit,
	local.getRepository().exactRef(localRef).getObjectId());
	assertTrue(local.getRepository().getObjectDatabase()
	.has(remoteCommit));
	}
	}

	@Test
	public void nonForcedFetchRejectedWhenCurrentRefUnchangedButNonFastForward()
	throws Exception {
	String localBranchName = "localfoo";
	String localRef = Constants.R_HEADS + localBranchName;
	String remoteBranchName = "remotefoo";
	String nonForcedRemoteRef = Constants.R_HEADS + remoteBranchName;

	RevCommit localCommit = local.branch(localBranchName).commit()
	.add("local.txt", "local").create();
	RevCommit remoteCommit = remote.branch(remoteBranchName).commit()
	.add("remote.txt", "remote").create();

	try (Git git = new Git(local.getRepository())) {
	FetchResult result = git.fetch()
	.setRemote(registerDefaultTestProtocol().toString())
	.setRefSpecs(
	new RefSpec(nonForcedRemoteRef + ":" + localRef))
	.call();

	TrackingRefUpdate update = result.getTrackingRefUpdate(localRef);
	assertEquals(RefUpdate.Result.REJECTED, update.getResult());
	assertEquals(localCommit,
	local.getRepository().exactRef(localRef).getObjectId());
	assertTrue(local.getRepository().getObjectDatabase()
	.has(remoteCommit));
	}
	}

	private TestProtocol<User> registerDefault() {
	return registerProto(new DefaultUpload(), new DefaultReceive());
	}

	private TestProtocol<User> registerProto(UploadPackFactory<User> upf,
	ReceivePackFactory<User> rpf) {
	TestProtocol<User> proto = new TestProtocol<>(upf, rpf);
	protos.add(proto);
	Transport.register(proto);
	return proto;
	}

	@FunctionalInterface
	interface TestRepositoryUpdateFunc {
	void call(TestRepository<InMemoryRepository> repository) throws Exception;
	}

	private <T extends AnyObjectId> URIish registerTestProtocolUpdatingRef(TestRepositoryUpdateFunc repositoryUpdateFunc) {
	TestProtocol<User> proto = registerProto((User req, Repository db) -> {
	try {
	repositoryUpdateFunc.call(local);
	} catch (Exception e) {
	throw new AssertionError("Cannot update local ref", e);
	}
	return new UploadPack(db);
	}, new DefaultReceive());
	return proto.register(new User("user"), remote.getRepository());
	}

	private URIish registerDefaultTestProtocol() {
	TestProtocol<User> setupProto = registerDefault();
	return setupProto.register(new User("user"), remote.getRepository());
	}
	}