/*
* Copyright (C) 2008, Google Inc.
*
* 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 Git Development Community 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.spearce.jgit.util;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Arrays;
import junit.framework.TestCase;
public class TemporaryBufferTest extends TestCase {
public void testEmpty() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer();
try {
b.close();
assertEquals(0, b.length());
final byte[] r = b.toByteArray();
assertNotNull(r);
assertEquals(0, r.length);
} finally {
b.destroy();
}
}
public void testOneByte() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer();
final byte test = (byte) new TestRng(getName()).nextInt();
try {
b.write(test);
b.close();
assertEquals(1, b.length());
{
final byte[] r = b.toByteArray();
assertNotNull(r);
assertEquals(1, r.length);
assertEquals(test, r[0]);
}
{
final ByteArrayOutputStream o = new ByteArrayOutputStream();
b.writeTo(o, null);
o.close();
final byte[] r = o.toByteArray();
assertEquals(1, r.length);
assertEquals(test, r[0]);
}
} finally {
b.destroy();
}
}
public void testOneBlock_BulkWrite() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer();
final byte[] test = new TestRng(getName())
.nextBytes(TemporaryBuffer.Block.SZ);
try {
b.write(test, 0, 2);
b.write(test, 2, 4);
b.write(test, 6, test.length - 6 - 2);
b.write(test, test.length - 2, 2);
b.close();
assertEquals(test.length, b.length());
{
final byte[] r = b.toByteArray();
assertNotNull(r);
assertEquals(test.length, r.length);
assertTrue(Arrays.equals(test, r));
}
{
final ByteArrayOutputStream o = new ByteArrayOutputStream();
b.writeTo(o, null);
o.close();
final byte[] r = o.toByteArray();
assertEquals(test.length, r.length);
assertTrue(Arrays.equals(test, r));
}
} finally {
b.destroy();
}
}
public void testOneBlockAndHalf_BulkWrite() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer();
final byte[] test = new TestRng(getName())
.nextBytes(TemporaryBuffer.Block.SZ * 3 / 2);
try {
b.write(test, 0, 2);
b.write(test, 2, 4);
b.write(test, 6, test.length - 6 - 2);
b.write(test, test.length - 2, 2);
b.close();
assertEquals(test.length, b.length());
{
final byte[] r = b.toByteArray();
assertNotNull(r);
assertEquals(test.length, r.length);
assertTrue(Arrays.equals(test, r));
}
{
final ByteArrayOutputStream o = new ByteArrayOutputStream();
b.writeTo(o, null);
o.close();
final byte[] r = o.toByteArray();
assertEquals(test.length, r.length);
assertTrue(Arrays.equals(test, r));
}
} finally {
b.destroy();
}
}
public void testOneBlockAndHalf_SingleWrite() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer();
final byte[] test = new TestRng(getName())
.nextBytes(TemporaryBuffer.Block.SZ * 3 / 2);
try {
for (int i = 0; i < test.length; i++)
b.write(test[i]);
b.close();
assertEquals(test.length, b.length());
{
final byte[] r = b.toByteArray();
assertNotNull(r);
assertEquals(test.length, r.length);
assertTrue(Arrays.equals(test, r));
}
{
final ByteArrayOutputStream o = new ByteArrayOutputStream();
b.writeTo(o, null);
o.close();
final byte[] r = o.toByteArray();
assertEquals(test.length, r.length);
assertTrue(Arrays.equals(test, r));
}
} finally {
b.destroy();
}
}
public void testOneBlockAndHalf_Copy() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer();
final byte[] test = new TestRng(getName())
.nextBytes(TemporaryBuffer.Block.SZ * 3 / 2);
try {
final ByteArrayInputStream in = new ByteArrayInputStream(test);
b.write(in.read());
b.copy(in);
b.close();
assertEquals(test.length, b.length());
{
final byte[] r = b.toByteArray();
assertNotNull(r);
assertEquals(test.length, r.length);
assertTrue(Arrays.equals(test, r));
}
{
final ByteArrayOutputStream o = new ByteArrayOutputStream();
b.writeTo(o, null);
o.close();
final byte[] r = o.toByteArray();
assertEquals(test.length, r.length);
assertTrue(Arrays.equals(test, r));
}
} finally {
b.destroy();
}
}
public void testLarge_SingleWrite() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer();
final byte[] test = new TestRng(getName())
.nextBytes(TemporaryBuffer.DEFAULT_IN_CORE_LIMIT * 3);
try {
b.write(test);
b.close();
assertEquals(test.length, b.length());
{
final byte[] r = b.toByteArray();
assertNotNull(r);
assertEquals(test.length, r.length);
assertTrue(Arrays.equals(test, r));
}
{
final ByteArrayOutputStream o = new ByteArrayOutputStream();
b.writeTo(o, null);
o.close();
final byte[] r = o.toByteArray();
assertEquals(test.length, r.length);
assertTrue(Arrays.equals(test, r));
}
} finally {
b.destroy();
}
}
public void testInCoreLimit_SwitchOnAppendByte() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer();
final byte[] test = new TestRng(getName())
.nextBytes(TemporaryBuffer.DEFAULT_IN_CORE_LIMIT + 1);
try {
b.write(test, 0, test.length - 1);
b.write(test[test.length - 1]);
b.close();
assertEquals(test.length, b.length());
{
final byte[] r = b.toByteArray();
assertNotNull(r);
assertEquals(test.length, r.length);
assertTrue(Arrays.equals(test, r));
}
{
final ByteArrayOutputStream o = new ByteArrayOutputStream();
b.writeTo(o, null);
o.close();
final byte[] r = o.toByteArray();
assertEquals(test.length, r.length);
assertTrue(Arrays.equals(test, r));
}
} finally {
b.destroy();
}
}
public void testInCoreLimit_SwitchBeforeAppendByte() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer();
final byte[] test = new TestRng(getName())
.nextBytes(TemporaryBuffer.DEFAULT_IN_CORE_LIMIT * 3);
try {
b.write(test, 0, test.length - 1);
b.write(test[test.length - 1]);
b.close();
assertEquals(test.length, b.length());
{
final byte[] r = b.toByteArray();
assertNotNull(r);
assertEquals(test.length, r.length);
assertTrue(Arrays.equals(test, r));
}
{
final ByteArrayOutputStream o = new ByteArrayOutputStream();
b.writeTo(o, null);
o.close();
final byte[] r = o.toByteArray();
assertEquals(test.length, r.length);
assertTrue(Arrays.equals(test, r));
}
} finally {
b.destroy();
}
}
public void testInCoreLimit_SwitchOnCopy() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer();
final byte[] test = new TestRng(getName())
.nextBytes(TemporaryBuffer.DEFAULT_IN_CORE_LIMIT * 2);
try {
final ByteArrayInputStream in = new ByteArrayInputStream(test,
TemporaryBuffer.DEFAULT_IN_CORE_LIMIT, test.length
- TemporaryBuffer.DEFAULT_IN_CORE_LIMIT);
b.write(test, 0, TemporaryBuffer.DEFAULT_IN_CORE_LIMIT);
b.copy(in);
b.close();
assertEquals(test.length, b.length());
{
final byte[] r = b.toByteArray();
assertNotNull(r);
assertEquals(test.length, r.length);
assertTrue(Arrays.equals(test, r));
}
{
final ByteArrayOutputStream o = new ByteArrayOutputStream();
b.writeTo(o, null);
o.close();
final byte[] r = o.toByteArray();
assertEquals(test.length, r.length);
assertTrue(Arrays.equals(test, r));
}
} finally {
b.destroy();
}
}
public void testDestroyWhileOpen() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer();
try {
b.write(new TestRng(getName())
.nextBytes(TemporaryBuffer.DEFAULT_IN_CORE_LIMIT * 2));
} finally {
b.destroy();
}
}
public void testRandomWrites() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer();
final TestRng rng = new TestRng(getName());
final int max = TemporaryBuffer.DEFAULT_IN_CORE_LIMIT * 2;
final byte[] expect = new byte[max];
try {
int written = 0;
boolean onebyte = true;
while (written < max) {
if (onebyte) {
final byte v = (byte) rng.nextInt();
b.write(v);
expect[written++] = v;
} else {
final int len = Math
.min(rng.nextInt() & 127, max - written);
final byte[] tmp = rng.nextBytes(len);
b.write(tmp, 0, len);
System.arraycopy(tmp, 0, expect, written, len);
written += len;
}
onebyte = !onebyte;
}
assertEquals(expect.length, written);
b.close();
assertEquals(expect.length, b.length());
{
final byte[] r = b.toByteArray();
assertNotNull(r);
assertEquals(expect.length, r.length);
assertTrue(Arrays.equals(expect, r));
}
{
final ByteArrayOutputStream o = new ByteArrayOutputStream();
b.writeTo(o, null);
o.close();
final byte[] r = o.toByteArray();
assertEquals(expect.length, r.length);
assertTrue(Arrays.equals(expect, r));
}
} finally {
b.destroy();
}
}
}