/*
* Copyright (C) 2011, GEBIT Solutions
* and other copyright owners as documented in the project's IP log.
*
* This program and the accompanying materials are made available
* under the terms of the Eclipse Distribution License v1.0 which
* accompanies this distribution, is reproduced below, and is
* available at http://www.eclipse.org/org/documents/edl-v10.php
*
* All rights reserved.
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* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
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* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above
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package org.eclipse.jgit.revwalk;
import static org.junit.Assert.assertNull;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jgit.diff.DiffConfig;
import org.eclipse.jgit.diff.DiffEntry;
import org.eclipse.jgit.junit.TestRepository.CommitBuilder;
import org.eclipse.jgit.lib.Config;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
public class RevWalkFollowFilterTest extends RevWalkTestCase {
private static class DiffCollector extends RenameCallback {
List<DiffEntry> diffs = new ArrayList<DiffEntry>();
@Override
public void renamed(DiffEntry diff) {
diffs.add(diff);
}
}
private DiffCollector diffCollector;
@Before
@Override
public void setUp() throws Exception {
super.setUp();
diffCollector = new DiffCollector();
}
protected FollowFilter follow(final String followPath) {
FollowFilter followFilter =
FollowFilter.create(followPath, new Config().get(DiffConfig.KEY));
followFilter.setRenameCallback(diffCollector);
rw.setTreeFilter(followFilter);
return followFilter;
}
@Test
public void testNoRename() throws Exception {
final RevCommit a = commit(tree(file("0", blob("0"))));
follow("0");
markStart(a);
assertCommit(a, rw.next());
assertNull(rw.next());
assertNoRenames();
}
@Test
public void testSingleRename() throws Exception {
final RevCommit a = commit(tree(file("a", blob("A"))));
// rename a to b
CommitBuilder commitBuilder = commitBuilder().parent(a)
.add("b", blob("A")).rm("a");
RevCommit renameCommit = commitBuilder.create();
follow("b");
markStart(renameCommit);
assertCommit(renameCommit, rw.next());
assertCommit(a, rw.next());
assertNull(rw.next());
assertRenames("a->b");
}
@Test
public void testMultiRename() throws Exception {
final String contents = "A";
final RevCommit a = commit(tree(file("a", blob(contents))));
// rename a to b
CommitBuilder commitBuilder = commitBuilder().parent(a)
.add("b", blob(contents)).rm("a");
RevCommit renameCommit1 = commitBuilder.create();
// rename b to c
commitBuilder = commitBuilder().parent(renameCommit1)
.add("c", blob(contents)).rm("b");
RevCommit renameCommit2 = commitBuilder.create();
// rename c to a
commitBuilder = commitBuilder().parent(renameCommit2)
.add("a", blob(contents)).rm("c");
RevCommit renameCommit3 = commitBuilder.create();
follow("a");
markStart(renameCommit3);
assertCommit(renameCommit3, rw.next());
assertCommit(renameCommit2, rw.next());
assertCommit(renameCommit1, rw.next());
assertCommit(a, rw.next());
assertNull(rw.next());
assertRenames("c->a", "b->c", "a->b");
}
/**
* Assert which renames should have happened, in traversal order.
* @param expectedRenames
* the rename specs, each one in the form "srcPath->destPath"
*/
protected void assertRenames(String... expectedRenames) {
Assert.assertEquals("Unexpected number of renames. Expected: " +
expectedRenames.length + ", actual: " + diffCollector.diffs.size(),
expectedRenames.length, diffCollector.diffs.size());
for (int i = 0; i < expectedRenames.length; i++) {
DiffEntry diff = diffCollector.diffs.get(i);
Assert.assertNotNull(diff);
String[] split = expectedRenames[i].split("->");
Assert.assertNotNull(split);
Assert.assertEquals(2, split.length);
String src = split[0];
String target = split[1];
Assert.assertEquals(src, diff.getOldPath());
Assert.assertEquals(target, diff.getNewPath());
}
}
protected void assertNoRenames() {
Assert.assertEquals("Found unexpected rename/copy diff", 0,
diffCollector.diffs.size());
}
}