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/*
* Copyright (C) 2014, Robin Stocker <robin@nibor.org> 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.revwalk;
import static java.util.Arrays.asList;
import static org.junit.Assert.assertEquals;
import java.util.Collection;
import java.util.List;
import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.RefComparator;
import org.junit.Test;
public class RevWalkUtilsReachableTest extends RevWalkTestCase {
@Test
public void oneCommit() throws Exception {
RevCommit a = commit();
Ref branchA = branch("a", a);
assertContains(a, asList(branchA));
}
@Test
public void twoCommits() throws Exception {
RevCommit a = commit();
RevCommit b = commit(a);
branch("a", a);
Ref branchB = branch("b", b);
assertContains(b, asList(branchB));
}
@Test
public void multipleBranches() throws Exception {
RevCommit a = commit();
RevCommit b = commit(a);
branch("a", a);
Ref branchB = branch("b", b);
Ref branchB2 = branch("b2", b);
assertContains(b, asList(branchB, branchB2));
}
@Test
public void withMerge() throws Exception {
RevCommit a = commit();
RevCommit b = commit();
RevCommit c = commit(a, b);
Ref branchA = branch("a", a);
Ref branchB = branch("b", b);
Ref branchC = branch("c", c);
assertContains(a, asList(branchA, branchC));
assertContains(b, asList(branchB, branchC));
}
@Test
public void withCommitLoadedByDifferentRevWalk() throws Exception {
RevCommit a = commit();
Ref branchA = branch("a", a);
try (RevWalk walk = new RevWalk(db)) {
RevCommit parsedCommit = walk.parseCommit(a.getId());
assertContains(parsedCommit, asList(branchA));
}
}
@Test
public void findBranchesReachableManyTimes() throws Exception {
/*
* a b
* | |
* c d
*/
RevCommit a = commit();
RevCommit b = commit();
RevCommit c = commit(a);
RevCommit d = commit(b);
Ref branchA = branch("a", a);
Ref branchB = branch("b", b);
Ref branchC = branch("c", c);
Ref branchD = branch("d", d);
assertContains(a, asList(branchA, branchC));
assertContains(b, asList(branchB, branchD));
assertContains(c, asList(branchC));
assertContains(d, asList(branchD));
}
private Ref branch(String name, RevCommit dst) throws Exception {
return Git.wrap(db).branchCreate().setName(name)
.setStartPoint(dst.name()).call();
}
private void assertContains(RevCommit commit, Collection<Ref> refsThatShouldContainCommit) throws Exception {
Collection<Ref> allRefs = db.getRefDatabase().getRefs();
Collection<Ref> sortedRefs = RefComparator.sort(allRefs);
List<Ref> actual = RevWalkUtils.findBranchesReachableFrom(commit,
rw, sortedRefs);
assertEquals(refsThatShouldContainCommit, actual);
}
}
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