| /* |
| * Copyright (C) 2019, Google LLC. 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.internal.revwalk; |
| |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.util.Arrays; |
| import java.util.Optional; |
| import java.util.stream.Stream; |
| |
| import org.eclipse.jgit.internal.storage.file.FileRepository; |
| import org.eclipse.jgit.junit.LocalDiskRepositoryTestCase; |
| import org.eclipse.jgit.junit.TestRepository; |
| import org.eclipse.jgit.revwalk.ReachabilityChecker; |
| import org.eclipse.jgit.revwalk.RevCommit; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| public abstract class ReachabilityCheckerTestCase |
| extends LocalDiskRepositoryTestCase { |
| |
| protected abstract ReachabilityChecker getChecker( |
| TestRepository<FileRepository> repository) throws Exception; |
| |
| TestRepository<FileRepository> repo; |
| |
| /** {@inheritDoc} */ |
| @Override |
| @Before |
| public void setUp() throws Exception { |
| super.setUp(); |
| FileRepository db = createWorkRepository(); |
| repo = new TestRepository<>(db); |
| } |
| |
| @Test |
| public void reachable() throws Exception { |
| RevCommit a = repo.commit().create(); |
| RevCommit b1 = repo.commit(a); |
| RevCommit b2 = repo.commit(b1); |
| RevCommit c1 = repo.commit(a); |
| RevCommit c2 = repo.commit(c1); |
| repo.update("refs/heads/checker", b2); |
| |
| ReachabilityChecker checker = getChecker(repo); |
| |
| assertReachable("reachable from one tip", |
| checker.areAllReachable(Arrays.asList(a), Stream.of(c2))); |
| assertReachable("reachable from another tip", |
| checker.areAllReachable(Arrays.asList(a), Stream.of(b2))); |
| assertReachable("reachable from itself", |
| checker.areAllReachable(Arrays.asList(a), Stream.of(b2))); |
| } |
| |
| @Test |
| public void reachable_merge() throws Exception { |
| RevCommit a = repo.commit().create(); |
| RevCommit b1 = repo.commit(a); |
| RevCommit b2 = repo.commit(b1); |
| RevCommit c1 = repo.commit(a); |
| RevCommit c2 = repo.commit(c1); |
| RevCommit merge = repo.commit(c2, b2); |
| repo.update("refs/heads/checker", merge); |
| |
| ReachabilityChecker checker = getChecker(repo); |
| |
| assertReachable("reachable through one branch", |
| checker.areAllReachable(Arrays.asList(b1), |
| Stream.of(merge))); |
| assertReachable("reachable through another branch", |
| checker.areAllReachable(Arrays.asList(c1), |
| Stream.of(merge))); |
| assertReachable("reachable, before the branching", |
| checker.areAllReachable(Arrays.asList(a), |
| Stream.of(merge))); |
| } |
| |
| @Test |
| public void unreachable_isLaterCommit() throws Exception { |
| RevCommit a = repo.commit().create(); |
| RevCommit b1 = repo.commit(a); |
| RevCommit b2 = repo.commit(b1); |
| repo.update("refs/heads/checker", b2); |
| |
| ReachabilityChecker checker = getChecker(repo); |
| |
| assertUnreachable("unreachable from the future", |
| checker.areAllReachable(Arrays.asList(b2), Stream.of(b1))); |
| } |
| |
| @Test |
| public void unreachable_differentBranch() throws Exception { |
| RevCommit a = repo.commit().create(); |
| RevCommit b1 = repo.commit(a); |
| RevCommit b2 = repo.commit(b1); |
| RevCommit c1 = repo.commit(a); |
| repo.update("refs/heads/checker", b2); |
| |
| ReachabilityChecker checker = getChecker(repo); |
| |
| assertUnreachable("unreachable from different branch", |
| checker.areAllReachable(Arrays.asList(c1), Stream.of(b2))); |
| } |
| |
| @Test |
| public void reachable_longChain() throws Exception { |
| RevCommit root = repo.commit().create(); |
| RevCommit head = root; |
| for (int i = 0; i < 10000; i++) { |
| head = repo.commit(head); |
| } |
| repo.update("refs/heads/master", head); |
| |
| ReachabilityChecker checker = getChecker(repo); |
| |
| assertReachable("reachable with long chain in the middle", checker |
| .areAllReachable(Arrays.asList(root), Stream.of(head))); |
| } |
| |
| private static void assertReachable(String msg, |
| Optional<RevCommit> result) { |
| assertFalse(msg, result.isPresent()); |
| } |
| |
| private static void assertUnreachable(String msg, |
| Optional<RevCommit> result) { |
| assertTrue(msg, result.isPresent()); |
| } |
| } |