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package org.eclipse.jgit.util;
import static org.eclipse.jgit.junit.JGitTestUtil.getName;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.fail;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import org.eclipse.jgit.junit.TestRng;
import org.eclipse.jgit.util.TemporaryBuffer.Block;
import org.junit.Test;
public class TemporaryBufferTest {
@Test
public void testEmpty() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer.LocalFile(null);
try {
b.close();
assertEquals(0, b.length());
final byte[] r = b.toByteArray();
assertNotNull(r);
assertEquals(0, r.length);
} finally {
b.destroy();
}
}
@Test
public void testOneByte() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer.LocalFile(null);
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();
}
}
@Test
public void testOneBlock_BulkWrite() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer.LocalFile(null);
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);
assertArrayEquals(test, r);
}
{
final ByteArrayOutputStream o = new ByteArrayOutputStream();
b.writeTo(o, null);
o.close();
final byte[] r = o.toByteArray();
assertEquals(test.length, r.length);
assertArrayEquals(test, r);
}
} finally {
b.destroy();
}
}
@Test
public void testOneBlockAndHalf_BulkWrite() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer.LocalFile(null);
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);
assertArrayEquals(test, r);
}
{
final ByteArrayOutputStream o = new ByteArrayOutputStream();
b.writeTo(o, null);
o.close();
final byte[] r = o.toByteArray();
assertEquals(test.length, r.length);
assertArrayEquals(test, r);
}
} finally {
b.destroy();
}
}
@Test
public void testOneBlockAndHalf_SingleWrite() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer.LocalFile(null);
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);
assertArrayEquals(test, r);
}
{
final ByteArrayOutputStream o = new ByteArrayOutputStream();
b.writeTo(o, null);
o.close();
final byte[] r = o.toByteArray();
assertEquals(test.length, r.length);
assertArrayEquals(test, r);
}
} finally {
b.destroy();
}
}
@Test
public void testOneBlockAndHalf_Copy() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer.LocalFile(null);
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);
assertArrayEquals(test, r);
}
{
final ByteArrayOutputStream o = new ByteArrayOutputStream();
b.writeTo(o, null);
o.close();
final byte[] r = o.toByteArray();
assertEquals(test.length, r.length);
assertArrayEquals(test, r);
}
} finally {
b.destroy();
}
}
@Test
public void testLarge_SingleWrite() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer.LocalFile(null);
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);
assertArrayEquals(test, r);
}
{
final ByteArrayOutputStream o = new ByteArrayOutputStream();
b.writeTo(o, null);
o.close();
final byte[] r = o.toByteArray();
assertEquals(test.length, r.length);
assertArrayEquals(test, r);
}
} finally {
b.destroy();
}
}
@Test
public void testInCoreInputStream() throws IOException {
final int cnt = 256;
final byte[] test = new TestRng(getName()).nextBytes(cnt);
final TemporaryBuffer.Heap b = new TemporaryBuffer.Heap(cnt + 4);
b.write(test);
b.close();
InputStream in = b.openInputStream();
byte[] act = new byte[cnt];
IO.readFully(in, act, 0, cnt);
assertArrayEquals(test, act);
}
@Test
public void testInCoreLimit_SwitchOnAppendByte() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer.LocalFile(null);
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);
assertArrayEquals(test, r);
}
{
final ByteArrayOutputStream o = new ByteArrayOutputStream();
b.writeTo(o, null);
o.close();
final byte[] r = o.toByteArray();
assertEquals(test.length, r.length);
assertArrayEquals(test, r);
}
} finally {
b.destroy();
}
}
@Test
public void testInCoreLimit_SwitchBeforeAppendByte() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer.LocalFile(null);
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);
assertArrayEquals(test, r);
}
{
final ByteArrayOutputStream o = new ByteArrayOutputStream();
b.writeTo(o, null);
o.close();
final byte[] r = o.toByteArray();
assertEquals(test.length, r.length);
assertArrayEquals(test, r);
}
} finally {
b.destroy();
}
}
@Test
public void testInCoreLimit_SwitchOnCopy() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer.LocalFile(null);
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);
assertArrayEquals(test, r);
}
{
final ByteArrayOutputStream o = new ByteArrayOutputStream();
b.writeTo(o, null);
o.close();
final byte[] r = o.toByteArray();
assertEquals(test.length, r.length);
assertArrayEquals(test, r);
}
} finally {
b.destroy();
}
}
@Test
public void testDestroyWhileOpen() throws IOException {
@SuppressWarnings("resource" /* java 7 */)
final TemporaryBuffer b = new TemporaryBuffer.LocalFile(null);
try {
b.write(new TestRng(getName())
.nextBytes(TemporaryBuffer.DEFAULT_IN_CORE_LIMIT * 2));
} finally {
b.destroy();
}
}
@Test
public void testRandomWrites() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer.LocalFile(null);
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);
assertArrayEquals(expect, r);
}
{
final ByteArrayOutputStream o = new ByteArrayOutputStream();
b.writeTo(o, null);
o.close();
final byte[] r = o.toByteArray();
assertEquals(expect.length, r.length);
assertArrayEquals(expect, r);
}
} finally {
b.destroy();
}
}
@Test
public void testHeap() throws IOException {
@SuppressWarnings("resource" /* java 7 */)
final TemporaryBuffer b = new TemporaryBuffer.Heap(2 * 8 * 1024);
final byte[] r = new byte[8 * 1024];
b.write(r);
b.write(r);
try {
b.write(1);
fail("accepted too many bytes of data");
} catch (IOException e) {
assertEquals("In-memory buffer limit exceeded", e.getMessage());
}
}
@Test
public void testHeapWithEstimatedSize() throws IOException {
int sz = 2 * Block.SZ;
try (TemporaryBuffer b = new TemporaryBuffer.Heap(sz / 2, sz)) {
for (int i = 0; i < sz; i++) {
b.write('x');
}
try {
b.write(1);
fail("accepted too many bytes of data");
} catch (IOException e) {
assertEquals("In-memory buffer limit exceeded", e.getMessage());
}
try (InputStream in = b.openInputStream()) {
for (int i = 0; i < sz; i++) {
assertEquals('x', in.read());
}
assertEquals(-1, in.read());
}
}
}
}