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BrotliDecoderTest.java
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/
BrotliDecoderTest.java
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/*
* Copyright 2021 The Netty Project
*
* The Netty Project licenses this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package io.netty.handler.codec.compression;
import com.aayushatharva.brotli4j.encoder.BrotliOutputStream;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.CompositeByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.embedded.EmbeddedChannel;
import io.netty.util.internal.PlatformDependent;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.condition.DisabledIf;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.MethodSource;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Random;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;
@DisabledIf(value = "isNotSupported", disabledReason = "Brotli is not supported on this platform")
public class BrotliDecoderTest {
private static final Random RANDOM;
private static final byte[] BYTES_SMALL = new byte[256];
private static final byte[] BYTES_LARGE = new byte[256 * 1024];
private static final byte[] COMPRESSED_BYTES_SMALL;
private static final byte[] COMPRESSED_BYTES_LARGE;
static {
try {
Brotli.ensureAvailability();
RANDOM = new Random();
fillArrayWithCompressibleData(BYTES_SMALL);
fillArrayWithCompressibleData(BYTES_LARGE);
COMPRESSED_BYTES_SMALL = compress(BYTES_SMALL);
COMPRESSED_BYTES_LARGE = compress(BYTES_LARGE);
} catch (Throwable throwable) {
throw new ExceptionInInitializerError(throwable);
}
}
private static final ByteBuf WRAPPED_BYTES_SMALL = Unpooled.unreleasableBuffer(
Unpooled.wrappedBuffer(BYTES_SMALL)).asReadOnly();
private static final ByteBuf WRAPPED_BYTES_LARGE = Unpooled.unreleasableBuffer(
Unpooled.wrappedBuffer(BYTES_LARGE)).asReadOnly();
static boolean isNotSupported() {
return PlatformDependent.isOsx() && "aarch_64".equals(PlatformDependent.normalizedArch());
}
private static void fillArrayWithCompressibleData(byte[] array) {
for (int i = 0; i < array.length; i++) {
array[i] = i % 4 != 0 ? 0 : (byte) RANDOM.nextInt();
}
}
private static byte[] compress(byte[] data) throws IOException {
ByteArrayOutputStream os = new ByteArrayOutputStream();
BrotliOutputStream brotliOs = new BrotliOutputStream(os);
brotliOs.write(data);
brotliOs.close();
return os.toByteArray();
}
private EmbeddedChannel channel;
@BeforeEach
public void initChannel() {
channel = new EmbeddedChannel(new BrotliDecoder());
}
@AfterEach
public void destroyChannel() {
if (channel != null) {
channel.finishAndReleaseAll();
channel = null;
}
}
public static ByteBuf[] smallData() {
ByteBuf heap = Unpooled.wrappedBuffer(COMPRESSED_BYTES_SMALL);
ByteBuf direct = Unpooled.directBuffer(COMPRESSED_BYTES_SMALL.length);
direct.writeBytes(COMPRESSED_BYTES_SMALL);
return new ByteBuf[]{heap, direct};
}
public static ByteBuf[] largeData() {
ByteBuf heap = Unpooled.wrappedBuffer(COMPRESSED_BYTES_LARGE);
ByteBuf direct = Unpooled.directBuffer(COMPRESSED_BYTES_LARGE.length);
direct.writeBytes(COMPRESSED_BYTES_LARGE);
return new ByteBuf[]{heap, direct};
}
@ParameterizedTest
@MethodSource("smallData")
public void testDecompressionOfSmallChunkOfData(ByteBuf data) {
testDecompression(WRAPPED_BYTES_SMALL.duplicate(), data);
}
@ParameterizedTest
@MethodSource("largeData")
public void testDecompressionOfLargeChunkOfData(ByteBuf data) {
testDecompression(WRAPPED_BYTES_LARGE.duplicate(), data);
}
@ParameterizedTest
@MethodSource("largeData")
public void testDecompressionOfBatchedFlowOfData(ByteBuf data) {
testDecompressionOfBatchedFlow(WRAPPED_BYTES_LARGE, data);
}
private void testDecompression(final ByteBuf expected, final ByteBuf data) {
assertTrue(channel.writeInbound(data));
ByteBuf decompressed = readDecompressed(channel);
assertEquals(expected, decompressed);
decompressed.release();
}
private void testDecompressionOfBatchedFlow(final ByteBuf expected, final ByteBuf data) {
final int compressedLength = data.readableBytes();
int written = 0, length = RANDOM.nextInt(100);
while (written + length < compressedLength) {
ByteBuf compressedBuf = data.retainedSlice(written, length);
channel.writeInbound(compressedBuf);
written += length;
length = RANDOM.nextInt(100);
}
ByteBuf compressedBuf = data.slice(written, compressedLength - written);
assertTrue(channel.writeInbound(compressedBuf.retain()));
ByteBuf decompressedBuf = readDecompressed(channel);
assertEquals(expected, decompressedBuf);
decompressedBuf.release();
data.release();
}
private static ByteBuf readDecompressed(final EmbeddedChannel channel) {
CompositeByteBuf decompressed = Unpooled.compositeBuffer();
ByteBuf msg;
while ((msg = channel.readInbound()) != null) {
decompressed.addComponent(true, msg);
}
return decompressed;
}
}