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/*
* Copyright (C) 2021 Thomas Wolf <thomas.wolf@paranor.ch> 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.util.io;
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.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Arrays;
import org.junit.Test;
/**
* Tests for {@link BinaryHunkInputStream} and {@link BinaryHunkOutputStream}.
*/
public class BinaryHunkStreamTest {
@Test
public void testRoundtripWholeBuffer() throws IOException {
for (int length = 1; length < 520 + 52; length++) {
byte[] data = new byte[length];
for (int i = 0; i < data.length; i++) {
data[i] = (byte) (255 - (i % 256));
}
try (ByteArrayOutputStream bos = new ByteArrayOutputStream();
BinaryHunkOutputStream out = new BinaryHunkOutputStream(
bos)) {
out.write(data);
out.flush();
byte[] encoded = bos.toByteArray();
assertFalse(Arrays.equals(data, encoded));
try (BinaryHunkInputStream in = new BinaryHunkInputStream(
new ByteArrayInputStream(encoded))) {
byte[] decoded = new byte[data.length];
int newLength = in.read(decoded);
assertEquals(newLength, decoded.length);
assertEquals(-1, in.read());
assertArrayEquals(data, decoded);
}
}
}
}
@Test
public void testRoundtripChunks() throws IOException {
for (int length = 1; length < 520 + 52; length++) {
byte[] data = new byte[length];
for (int i = 0; i < data.length; i++) {
data[i] = (byte) (255 - (i % 256));
}
try (ByteArrayOutputStream bos = new ByteArrayOutputStream();
BinaryHunkOutputStream out = new BinaryHunkOutputStream(
bos)) {
out.write(data, 0, data.length / 2);
out.write(data, data.length / 2, data.length - data.length / 2);
out.flush();
byte[] encoded = bos.toByteArray();
assertFalse(Arrays.equals(data, encoded));
try (BinaryHunkInputStream in = new BinaryHunkInputStream(
new ByteArrayInputStream(encoded))) {
byte[] decoded = new byte[data.length];
int p = 0;
int n;
while ((n = in.read(decoded, p,
Math.min(decoded.length - p, 57))) >= 0) {
p += n;
if (p == decoded.length) {
break;
}
}
assertEquals(p, decoded.length);
assertEquals(-1, in.read());
assertArrayEquals(data, decoded);
}
}
}
}
@Test
public void testRoundtripBytes() throws IOException {
for (int length = 1; length < 520 + 52; length++) {
byte[] data = new byte[length];
for (int i = 0; i < data.length; i++) {
data[i] = (byte) (255 - (i % 256));
}
try (ByteArrayOutputStream bos = new ByteArrayOutputStream();
BinaryHunkOutputStream out = new BinaryHunkOutputStream(
bos)) {
for (int i = 0; i < data.length; i++) {
out.write(data[i]);
}
out.flush();
byte[] encoded = bos.toByteArray();
assertFalse(Arrays.equals(data, encoded));
try (BinaryHunkInputStream in = new BinaryHunkInputStream(
new ByteArrayInputStream(encoded))) {
byte[] decoded = new byte[data.length];
for (int i = 0; i < decoded.length; i++) {
int val = in.read();
assertTrue(0 <= val && val <= 255);
decoded[i] = (byte) val;
}
assertEquals(-1, in.read());
assertArrayEquals(data, decoded);
}
}
}
}
@Test
public void testRoundtripWithClose() throws IOException {
for (int length = 1; length < 520 + 52; length++) {
byte[] data = new byte[length];
for (int i = 0; i < data.length; i++) {
data[i] = (byte) (255 - (i % 256));
}
try (ByteArrayOutputStream bos = new ByteArrayOutputStream()) {
try (BinaryHunkOutputStream out = new BinaryHunkOutputStream(
bos)) {
out.write(data);
}
byte[] encoded = bos.toByteArray();
assertFalse(Arrays.equals(data, encoded));
try (BinaryHunkInputStream in = new BinaryHunkInputStream(
new ByteArrayInputStream(encoded))) {
byte[] decoded = new byte[data.length];
int newLength = in.read(decoded);
assertEquals(newLength, decoded.length);
assertEquals(-1, in.read());
assertArrayEquals(data, decoded);
}
}
}
}
}
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