| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed 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 |
| * |
| * http://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 libcore.java.util.zip; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.util.Arrays; |
| import java.util.Random; |
| import java.util.zip.GZIPInputStream; |
| import java.util.zip.GZIPOutputStream; |
| import junit.framework.TestCase; |
| |
| public final class GzipTest extends TestCase { |
| |
| public void testRoundtripShortMessage() throws IOException { |
| byte[] data = gzip(("Hello World").getBytes("UTF-8")); |
| assertTrue(Arrays.equals(data, gunzip(gzip(data)))); |
| } |
| |
| public void testRoundtripLongMessage() throws IOException { |
| byte[] data = new byte[1024 * 1024]; |
| new Random().nextBytes(data); |
| assertTrue(Arrays.equals(data, gunzip(gzip(data)))); |
| } |
| |
| /** http://b/3042574 GzipInputStream.skip() causing CRC failures */ |
| public void testSkip() throws IOException { |
| byte[] data = new byte[1024 * 1024]; |
| byte[] gzipped = gzip(data); |
| GZIPInputStream in = new GZIPInputStream(new ByteArrayInputStream(gzipped)); |
| long totalSkipped = 0; |
| |
| long count; |
| do { |
| count = in.skip(Long.MAX_VALUE); |
| totalSkipped += count; |
| } while (count > 0); |
| |
| |
| assertEquals(data.length, totalSkipped); |
| } |
| |
| public byte[] gzip(byte[] bytes) throws IOException { |
| ByteArrayOutputStream bytesOut = new ByteArrayOutputStream(); |
| OutputStream gzippedOut = new GZIPOutputStream(bytesOut); |
| gzippedOut.write(bytes); |
| gzippedOut.close(); |
| return bytesOut.toByteArray(); |
| } |
| |
| public byte[] gunzip(byte[] bytes) throws IOException { |
| InputStream in = new GZIPInputStream(new ByteArrayInputStream(bytes)); |
| ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| byte[] buffer = new byte[1024]; |
| int count; |
| while ((count = in.read(buffer)) != -1) { |
| out.write(buffer, 0, count); |
| } |
| return out.toByteArray(); |
| } |
| } |