| /* |
| * Copyright (C) 2010, Google Inc. |
| * 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. |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * |
| * - Neither the name of the Eclipse Foundation, Inc. nor the |
| * names of its contributors may be used to endorse or promote |
| * products derived from this software without specific prior |
| * written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
| * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
| * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| package org.eclipse.jgit.internal.storage.pack; |
| |
| import static org.junit.Assert.assertArrayEquals; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| |
| import org.eclipse.jgit.junit.JGitTestUtil; |
| import org.eclipse.jgit.junit.TestRng; |
| import org.eclipse.jgit.lib.Constants; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| public class DeltaIndexTest { |
| private TestRng rng; |
| |
| private ByteArrayOutputStream actDeltaBuf; |
| |
| private ByteArrayOutputStream expDeltaBuf; |
| |
| private DeltaEncoder expDeltaEnc; |
| |
| private byte[] src; |
| |
| private byte[] dst; |
| |
| private ByteArrayOutputStream dstBuf; |
| |
| private TestRng getRng() { |
| if (rng == null) |
| rng = new TestRng(JGitTestUtil.getName()); |
| return rng; |
| } |
| |
| @Before |
| public void setUp() throws Exception { |
| actDeltaBuf = new ByteArrayOutputStream(); |
| expDeltaBuf = new ByteArrayOutputStream(); |
| expDeltaEnc = new DeltaEncoder(expDeltaBuf, 0, 0); |
| dstBuf = new ByteArrayOutputStream(); |
| } |
| |
| @Test |
| public void testInsertWholeObject_Length12() throws IOException { |
| src = getRng().nextBytes(12); |
| insert(src); |
| doTest(); |
| } |
| |
| @Test |
| public void testCopyWholeObject_Length128() throws IOException { |
| src = getRng().nextBytes(128); |
| copy(0, 128); |
| doTest(); |
| } |
| |
| @Test |
| public void testCopyWholeObject_Length123() throws IOException { |
| src = getRng().nextBytes(123); |
| copy(0, 123); |
| doTest(); |
| } |
| |
| @Test |
| public void testCopyZeros_Length128() throws IOException { |
| src = new byte[2048]; |
| copy(0, src.length); |
| doTest(); |
| |
| // The index should be smaller than expected due to the chain |
| // being truncated. Without truncation we would expect to have |
| // more than 3584 bytes used. |
| // |
| assertEquals(2636, new DeltaIndex(src).getIndexSize()); |
| } |
| |
| @Test |
| public void testShuffleSegments() throws IOException { |
| src = getRng().nextBytes(128); |
| copy(64, 64); |
| copy(0, 64); |
| doTest(); |
| } |
| |
| @Test |
| public void testInsertHeadMiddle() throws IOException { |
| src = getRng().nextBytes(1024); |
| insert("foo"); |
| copy(0, 512); |
| insert("yet more fooery"); |
| copy(0, 512); |
| doTest(); |
| } |
| |
| @Test |
| public void testInsertTail() throws IOException { |
| src = getRng().nextBytes(1024); |
| copy(0, 512); |
| insert("bar"); |
| doTest(); |
| } |
| |
| @Test |
| public void testIndexSize() { |
| src = getRng().nextBytes(1024); |
| DeltaIndex di = new DeltaIndex(src); |
| assertEquals(1860, di.getIndexSize()); |
| assertEquals("DeltaIndex[2 KiB]", di.toString()); |
| } |
| |
| @Test |
| public void testLimitObjectSize_Length12InsertFails() throws IOException { |
| src = getRng().nextBytes(12); |
| dst = src; |
| |
| DeltaIndex di = new DeltaIndex(src); |
| assertFalse(di.encode(actDeltaBuf, dst, src.length)); |
| } |
| |
| @Test |
| public void testLimitObjectSize_Length130InsertFails() throws IOException { |
| src = getRng().nextBytes(130); |
| dst = getRng().nextBytes(130); |
| |
| DeltaIndex di = new DeltaIndex(src); |
| assertFalse(di.encode(actDeltaBuf, dst, src.length)); |
| } |
| |
| @Test |
| public void testLimitObjectSize_Length130CopyOk() throws IOException { |
| src = getRng().nextBytes(130); |
| copy(0, 130); |
| dst = dstBuf.toByteArray(); |
| |
| DeltaIndex di = new DeltaIndex(src); |
| assertTrue(di.encode(actDeltaBuf, dst, dst.length)); |
| |
| byte[] actDelta = actDeltaBuf.toByteArray(); |
| byte[] expDelta = expDeltaBuf.toByteArray(); |
| |
| assertEquals(BinaryDelta.format(expDelta, false), // |
| BinaryDelta.format(actDelta, false)); |
| } |
| |
| @Test |
| public void testLimitObjectSize_Length130CopyFails() throws IOException { |
| src = getRng().nextBytes(130); |
| copy(0, 130); |
| dst = dstBuf.toByteArray(); |
| |
| // The header requires 4 bytes for these objects, so a target length |
| // of 5 is bigger than the copy instruction and should cause an abort. |
| // |
| DeltaIndex di = new DeltaIndex(src); |
| assertFalse(di.encode(actDeltaBuf, dst, 5)); |
| assertEquals(4, actDeltaBuf.size()); |
| } |
| |
| @Test |
| public void testLimitObjectSize_InsertFrontFails() throws IOException { |
| src = getRng().nextBytes(130); |
| insert("eight"); |
| copy(0, 130); |
| dst = dstBuf.toByteArray(); |
| |
| // The header requires 4 bytes for these objects, so a target length |
| // of 5 is bigger than the copy instruction and should cause an abort. |
| // |
| DeltaIndex di = new DeltaIndex(src); |
| assertFalse(di.encode(actDeltaBuf, dst, 5)); |
| assertEquals(4, actDeltaBuf.size()); |
| } |
| |
| private void copy(int offset, int len) throws IOException { |
| dstBuf.write(src, offset, len); |
| expDeltaEnc.copy(offset, len); |
| } |
| |
| private void insert(String text) throws IOException { |
| insert(Constants.encode(text)); |
| } |
| |
| private void insert(byte[] text) throws IOException { |
| dstBuf.write(text); |
| expDeltaEnc.insert(text); |
| } |
| |
| private void doTest() throws IOException { |
| dst = dstBuf.toByteArray(); |
| |
| DeltaIndex di = new DeltaIndex(src); |
| di.encode(actDeltaBuf, dst); |
| |
| byte[] actDelta = actDeltaBuf.toByteArray(); |
| byte[] expDelta = expDeltaBuf.toByteArray(); |
| |
| assertEquals(BinaryDelta.format(expDelta, false), // |
| BinaryDelta.format(actDelta, false)); |
| |
| assertTrue("delta is not empty", actDelta.length > 0); |
| assertEquals(src.length, BinaryDelta.getBaseSize(actDelta)); |
| assertEquals(dst.length, BinaryDelta.getResultSize(actDelta)); |
| assertArrayEquals(dst, BinaryDelta.apply(src, actDelta)); |
| } |
| } |