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/*
* Copyright (C) 2020, Lee Worrall 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.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.hasKey;
import static org.hamcrest.Matchers.instanceOf;
import static org.hamcrest.Matchers.not;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.assertThrows;
import java.io.ByteArrayInputStream;
import java.io.EOFException;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import org.eclipse.jgit.errors.NoRemoteRepositoryException;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectIdRef;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.SymbolicRef;
import org.junit.Test;
public class BasePackConnectionTest {
@Test
public void testReadAdvertisedRefsShouldThrowExceptionWithOriginalCause() {
try (FailingBasePackConnection basePackConnection =
new FailingBasePackConnection()) {
Exception result = assertThrows(NoRemoteRepositoryException.class,
basePackConnection::readAdvertisedRefs);
assertEquals(EOFException.class, result.getCause().getClass());
}
}
@Test
public void testUpdateWithSymRefsAdds() {
final Ref mainRef = new ObjectIdRef.Unpeeled(Ref.Storage.LOOSE,
"refs/heads/main", ObjectId.fromString(
"0000000000000000000000000000000000000001"));
final Map<String, Ref> refMap = new HashMap<>();
refMap.put(mainRef.getName(), mainRef);
refMap.put("refs/heads/other",
new ObjectIdRef.Unpeeled(Ref.Storage.LOOSE, "refs/heads/other",
ObjectId.fromString(
"0000000000000000000000000000000000000002")));
final Map<String, String> symRefs = new HashMap<>();
symRefs.put("HEAD", "refs/heads/main");
BasePackConnection.updateWithSymRefs(refMap, symRefs);
assertThat(refMap, hasKey("HEAD"));
final Ref headRef = refMap.get("HEAD");
assertThat(headRef, instanceOf(SymbolicRef.class));
final SymbolicRef headSymRef = (SymbolicRef) headRef;
assertEquals("HEAD", headSymRef.getName());
assertSame(mainRef, headSymRef.getTarget());
}
@Test
public void testUpdateWithSymRefsReplaces() {
final Ref mainRef = new ObjectIdRef.Unpeeled(Ref.Storage.LOOSE,
"refs/heads/main", ObjectId.fromString(
"0000000000000000000000000000000000000001"));
final Map<String, Ref> refMap = new HashMap<>();
refMap.put(mainRef.getName(), mainRef);
refMap.put("HEAD", new ObjectIdRef.Unpeeled(Ref.Storage.LOOSE, "HEAD",
mainRef.getObjectId()));
refMap.put("refs/heads/other",
new ObjectIdRef.Unpeeled(Ref.Storage.LOOSE, "refs/heads/other",
ObjectId.fromString(
"0000000000000000000000000000000000000002")));
final Map<String, String> symRefs = new HashMap<>();
symRefs.put("HEAD", "refs/heads/main");
BasePackConnection.updateWithSymRefs(refMap, symRefs);
assertThat(refMap, hasKey("HEAD"));
final Ref headRef = refMap.get("HEAD");
assertThat(headRef, instanceOf(SymbolicRef.class));
final SymbolicRef headSymRef = (SymbolicRef) headRef;
assertEquals("HEAD", headSymRef.getName());
assertSame(mainRef, headSymRef.getTarget());
}
@Test
public void testUpdateWithSymRefsWithIndirectsAdds() {
final Ref mainRef = new ObjectIdRef.Unpeeled(Ref.Storage.LOOSE,
"refs/heads/main", ObjectId.fromString(
"0000000000000000000000000000000000000001"));
final Map<String, Ref> refMap = new HashMap<>();
refMap.put(mainRef.getName(), mainRef);
refMap.put("refs/heads/other",
new ObjectIdRef.Unpeeled(Ref.Storage.LOOSE, "refs/heads/other",
ObjectId.fromString(
"0000000000000000000000000000000000000002")));
final Map<String, String> symRefs = new LinkedHashMap<>(); // Ordered
symRefs.put("refs/heads/sym3", "refs/heads/sym2"); // Forward reference
symRefs.put("refs/heads/sym1", "refs/heads/main");
symRefs.put("refs/heads/sym2", "refs/heads/sym1"); // Backward reference
BasePackConnection.updateWithSymRefs(refMap, symRefs);
assertThat(refMap, hasKey("refs/heads/sym1"));
final Ref sym1Ref = refMap.get("refs/heads/sym1");
assertThat(sym1Ref, instanceOf(SymbolicRef.class));
final SymbolicRef sym1SymRef = (SymbolicRef) sym1Ref;
assertEquals("refs/heads/sym1", sym1SymRef.getName());
assertSame(mainRef, sym1SymRef.getTarget());
assertThat(refMap, hasKey("refs/heads/sym2"));
final Ref sym2Ref = refMap.get("refs/heads/sym2");
assertThat(sym2Ref, instanceOf(SymbolicRef.class));
final SymbolicRef sym2SymRef = (SymbolicRef) sym2Ref;
assertEquals("refs/heads/sym2", sym2SymRef.getName());
assertSame(sym1SymRef, sym2SymRef.getTarget());
assertThat(refMap, hasKey("refs/heads/sym3"));
final Ref sym3Ref = refMap.get("refs/heads/sym3");
assertThat(sym3Ref, instanceOf(SymbolicRef.class));
final SymbolicRef sym3SymRef = (SymbolicRef) sym3Ref;
assertEquals("refs/heads/sym3", sym3SymRef.getName());
assertSame(sym2SymRef, sym3SymRef.getTarget());
}
@Test
public void testUpdateWithSymRefsWithIndirectsReplaces() {
final Ref mainRef = new ObjectIdRef.Unpeeled(Ref.Storage.LOOSE,
"refs/heads/main", ObjectId.fromString(
"0000000000000000000000000000000000000001"));
final Map<String, Ref> refMap = new HashMap<>();
refMap.put(mainRef.getName(), mainRef);
refMap.put("refs/heads/sym1", new ObjectIdRef.Unpeeled(
Ref.Storage.LOOSE, "refs/heads/sym1", mainRef.getObjectId()));
refMap.put("refs/heads/sym2", new ObjectIdRef.Unpeeled(
Ref.Storage.LOOSE, "refs/heads/sym2", mainRef.getObjectId()));
refMap.put("refs/heads/sym3", new ObjectIdRef.Unpeeled(
Ref.Storage.LOOSE, "refs/heads/sym3", mainRef.getObjectId()));
refMap.put("refs/heads/other",
new ObjectIdRef.Unpeeled(Ref.Storage.LOOSE, "refs/heads/other",
ObjectId.fromString(
"0000000000000000000000000000000000000002")));
final Map<String, String> symRefs = new LinkedHashMap<>(); // Ordered
symRefs.put("refs/heads/sym3", "refs/heads/sym2"); // Forward reference
symRefs.put("refs/heads/sym1", "refs/heads/main");
symRefs.put("refs/heads/sym2", "refs/heads/sym1"); // Backward reference
BasePackConnection.updateWithSymRefs(refMap, symRefs);
assertThat(refMap, hasKey("refs/heads/sym1"));
final Ref sym1Ref = refMap.get("refs/heads/sym1");
assertThat(sym1Ref, instanceOf(SymbolicRef.class));
final SymbolicRef sym1SymRef = (SymbolicRef) sym1Ref;
assertEquals("refs/heads/sym1", sym1SymRef.getName());
assertSame(mainRef, sym1SymRef.getTarget());
assertThat(refMap, hasKey("refs/heads/sym2"));
final Ref sym2Ref = refMap.get("refs/heads/sym2");
assertThat(sym2Ref, instanceOf(SymbolicRef.class));
final SymbolicRef sym2SymRef = (SymbolicRef) sym2Ref;
assertEquals("refs/heads/sym2", sym2SymRef.getName());
assertSame(sym1SymRef, sym2SymRef.getTarget());
assertThat(refMap, hasKey("refs/heads/sym3"));
final Ref sym3Ref = refMap.get("refs/heads/sym3");
assertThat(sym3Ref, instanceOf(SymbolicRef.class));
final SymbolicRef sym3SymRef = (SymbolicRef) sym3Ref;
assertEquals("refs/heads/sym3", sym3SymRef.getName());
assertSame(sym2SymRef, sym3SymRef.getTarget());
}
@Test
public void testUpdateWithSymRefsIgnoresSelfReference() {
final Ref mainRef = new ObjectIdRef.Unpeeled(Ref.Storage.LOOSE,
"refs/heads/main", ObjectId.fromString(
"0000000000000000000000000000000000000001"));
final Map<String, Ref> refMap = new HashMap<>();
refMap.put(mainRef.getName(), mainRef);
refMap.put("refs/heads/other",
new ObjectIdRef.Unpeeled(Ref.Storage.LOOSE, "refs/heads/other",
ObjectId.fromString(
"0000000000000000000000000000000000000002")));
final Map<String, String> symRefs = new LinkedHashMap<>();
symRefs.put("refs/heads/sym1", "refs/heads/sym1");
BasePackConnection.updateWithSymRefs(refMap, symRefs);
assertEquals(2, refMap.size());
assertThat(refMap, not(hasKey("refs/heads/sym1")));
}
@Test
public void testUpdateWithSymRefsIgnoreCircularReference() {
final Ref mainRef = new ObjectIdRef.Unpeeled(Ref.Storage.LOOSE,
"refs/heads/main", ObjectId.fromString(
"0000000000000000000000000000000000000001"));
final Map<String, Ref> refMap = new HashMap<>();
refMap.put(mainRef.getName(), mainRef);
refMap.put("refs/heads/other",
new ObjectIdRef.Unpeeled(Ref.Storage.LOOSE, "refs/heads/other",
ObjectId.fromString(
"0000000000000000000000000000000000000002")));
final Map<String, String> symRefs = new LinkedHashMap<>();
symRefs.put("refs/heads/sym2", "refs/heads/sym1");
symRefs.put("refs/heads/sym1", "refs/heads/sym2");
BasePackConnection.updateWithSymRefs(refMap, symRefs);
assertEquals(2, refMap.size());
assertThat(refMap, not(hasKey("refs/heads/sym1")));
assertThat(refMap, not(hasKey("refs/heads/sym2")));
}
@Test
public void testUpdateWithSymRefsFillInHead() {
final String oidName = "0000000000000000000000000000000000000001";
final Ref advertised = new ObjectIdRef.PeeledNonTag(Ref.Storage.NETWORK,
Constants.HEAD, ObjectId.fromString(oidName));
final Map<String, Ref> refMap = new HashMap<>();
refMap.put(advertised.getName(), advertised);
final Map<String, String> symRefs = new HashMap<>();
symRefs.put("HEAD", "refs/heads/main");
BasePackConnection.updateWithSymRefs(refMap, symRefs);
assertThat(refMap, hasKey("HEAD"));
assertThat(refMap, hasKey("refs/heads/main"));
final Ref headRef = refMap.get("HEAD");
final Ref mainRef = refMap.get("refs/heads/main");
assertThat(headRef, instanceOf(SymbolicRef.class));
final SymbolicRef headSymRef = (SymbolicRef) headRef;
assertEquals(Constants.HEAD, headSymRef.getName());
assertSame(mainRef, headSymRef.getTarget());
assertEquals(oidName, headRef.getObjectId().name());
assertEquals(oidName, mainRef.getObjectId().name());
}
private static class FailingBasePackConnection extends BasePackConnection {
FailingBasePackConnection() {
super(new TransportLocal(new URIish(),
new java.io.File("")));
pckIn = new PacketLineIn(new ByteArrayInputStream(new byte[0]));
}
}
}
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