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/*
* Copyright (C) 2008-2009, 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.dircache;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNotSame;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertSame;
import java.io.IOException;
import org.eclipse.jgit.errors.CorruptObjectException;
import org.eclipse.jgit.junit.RepositoryTestCase;
import org.eclipse.jgit.lib.FileMode;
import org.junit.Test;
public class DirCacheTreeTest extends RepositoryTestCase {
@Test
public void testEmptyCache_NoCacheTree() throws Exception {
final DirCache dc = db.readDirCache();
assertNull(dc.getCacheTree(false));
}
@Test
public void testEmptyCache_CreateEmptyCacheTree() throws Exception {
final DirCache dc = db.readDirCache();
final DirCacheTree tree = dc.getCacheTree(true);
assertNotNull(tree);
assertSame(tree, dc.getCacheTree(false));
assertSame(tree, dc.getCacheTree(true));
assertEquals("", tree.getNameString());
assertEquals("", tree.getPathString());
assertEquals(0, tree.getChildCount());
assertEquals(0, tree.getEntrySpan());
assertFalse(tree.isValid());
}
@Test
public void testEmptyCache_Clear_NoCacheTree() throws Exception {
final DirCache dc = db.readDirCache();
final DirCacheTree tree = dc.getCacheTree(true);
assertNotNull(tree);
dc.clear();
assertNull(dc.getCacheTree(false));
assertNotSame(tree, dc.getCacheTree(true));
}
@Test
public void testSingleSubtree() throws Exception {
final DirCache dc = db.readDirCache();
final String[] paths = { "a-", "a/b", "a/c", "a/d", "a0b" };
final DirCacheEntry[] ents = new DirCacheEntry[paths.length];
for (int i = 0; i < paths.length; i++) {
ents[i] = new DirCacheEntry(paths[i]);
ents[i].setFileMode(FileMode.REGULAR_FILE);
}
final int aFirst = 1;
final int aLast = 3;
final DirCacheBuilder b = dc.builder();
for (DirCacheEntry ent : ents) {
b.add(ent);
}
b.finish();
assertNull(dc.getCacheTree(false));
final DirCacheTree root = dc.getCacheTree(true);
assertNotNull(root);
assertSame(root, dc.getCacheTree(true));
assertEquals("", root.getNameString());
assertEquals("", root.getPathString());
assertEquals(1, root.getChildCount());
assertEquals(dc.getEntryCount(), root.getEntrySpan());
assertFalse(root.isValid());
final DirCacheTree aTree = root.getChild(0);
assertNotNull(aTree);
assertSame(aTree, root.getChild(0));
assertEquals("a", aTree.getNameString());
assertEquals("a/", aTree.getPathString());
assertEquals(0, aTree.getChildCount());
assertEquals(aLast - aFirst + 1, aTree.getEntrySpan());
assertFalse(aTree.isValid());
}
@Test
public void testTwoLevelSubtree() throws Exception {
final DirCache dc = db.readDirCache();
final String[] paths = { "a-", "a/b", "a/c/e", "a/c/f", "a/d", "a0b" };
final DirCacheEntry[] ents = new DirCacheEntry[paths.length];
for (int i = 0; i < paths.length; i++) {
ents[i] = new DirCacheEntry(paths[i]);
ents[i].setFileMode(FileMode.REGULAR_FILE);
}
final int aFirst = 1;
final int aLast = 4;
final int acFirst = 2;
final int acLast = 3;
final DirCacheBuilder b = dc.builder();
for (DirCacheEntry ent : ents) {
b.add(ent);
}
b.finish();
assertNull(dc.getCacheTree(false));
final DirCacheTree root = dc.getCacheTree(true);
assertNotNull(root);
assertSame(root, dc.getCacheTree(true));
assertEquals("", root.getNameString());
assertEquals("", root.getPathString());
assertEquals(1, root.getChildCount());
assertEquals(dc.getEntryCount(), root.getEntrySpan());
assertFalse(root.isValid());
final DirCacheTree aTree = root.getChild(0);
assertNotNull(aTree);
assertSame(aTree, root.getChild(0));
assertEquals("a", aTree.getNameString());
assertEquals("a/", aTree.getPathString());
assertEquals(1, aTree.getChildCount());
assertEquals(aLast - aFirst + 1, aTree.getEntrySpan());
assertFalse(aTree.isValid());
final DirCacheTree acTree = aTree.getChild(0);
assertNotNull(acTree);
assertSame(acTree, aTree.getChild(0));
assertEquals("c", acTree.getNameString());
assertEquals("a/c/", acTree.getPathString());
assertEquals(0, acTree.getChildCount());
assertEquals(acLast - acFirst + 1, acTree.getEntrySpan());
assertFalse(acTree.isValid());
}
/**
* We had bugs related to buffer size in the DirCache. This test creates an
* index larger than the default BufferedInputStream buffer size. This made
* the DirCache unable to read the extensions when index size exceeded the
* buffer size (in some cases at least).
*
* @throws CorruptObjectException
* @throws IOException
*/
@Test
public void testWriteReadTree() throws CorruptObjectException, IOException {
final DirCache dc = db.lockDirCache();
final String A = String.format("a%2000s", "a");
final String B = String.format("b%2000s", "b");
final String[] paths = { A + "-", A + "-" + B, A + "/" + B, A + "0" + B };
final DirCacheEntry[] ents = new DirCacheEntry[paths.length];
for (int i = 0; i < paths.length; i++) {
ents[i] = new DirCacheEntry(paths[i]);
ents[i].setFileMode(FileMode.REGULAR_FILE);
}
final DirCacheBuilder b = dc.builder();
for (DirCacheEntry ent : ents) {
b.add(ent);
}
b.commit();
DirCache read = db.readDirCache();
assertEquals(paths.length, read.getEntryCount());
assertEquals(1, read.getCacheTree(true).getChildCount());
}
}
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