| /* |
| * 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.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Enumeration; |
| import java.util.Random; |
| import java.util.zip.ZipEntry; |
| import java.util.zip.ZipFile; |
| import java.util.zip.ZipInputStream; |
| import java.util.zip.ZipOutputStream; |
| import junit.framework.TestCase; |
| |
| public final class ZipFileTest extends TestCase { |
| |
| /** |
| * Exercise Inflater's ability to refill the zlib's input buffer. As of this |
| * writing, this buffer's max size is 64KiB compressed bytes. We'll write a |
| * full megabyte of uncompressed data, which should be sufficient to exhaust |
| * the buffer. http://b/issue?id=2734751 |
| */ |
| public void testInflatingFilesRequiringZipRefill() throws IOException { |
| int originalSize = 1024 * 1024; |
| byte[] readBuffer = new byte[8192]; |
| ZipFile zipFile = new ZipFile(createZipFile(originalSize)); |
| for (Enumeration<? extends ZipEntry> e = zipFile.entries(); e.hasMoreElements(); ) { |
| ZipEntry zipEntry = e.nextElement(); |
| assertTrue("This test needs >64 KiB of compressed data to exercise Inflater", |
| zipEntry.getCompressedSize() > (64 * 1024)); |
| InputStream is = zipFile.getInputStream(zipEntry); |
| while (is.read(readBuffer, 0, readBuffer.length) != -1) {} |
| is.close(); |
| } |
| } |
| |
| public void testInflatingStreamsRequiringZipRefill() throws IOException { |
| int originalSize = 1024 * 1024; |
| byte[] readBuffer = new byte[8192]; |
| ZipInputStream in = new ZipInputStream(new FileInputStream(createZipFile(originalSize))); |
| while (in.getNextEntry() != null) { |
| while (in.read(readBuffer, 0, readBuffer.length) != -1) {} |
| } |
| } |
| |
| /** |
| * Compresses a single random file into a .zip archive. |
| */ |
| private File createZipFile(int uncompressedSize) throws IOException { |
| File result = File.createTempFile("ZipFileTest", "zip"); |
| result.deleteOnExit(); |
| |
| ZipOutputStream out = new ZipOutputStream(new FileOutputStream(result)); |
| ZipEntry entry = new ZipEntry("random"); |
| out.putNextEntry(entry); |
| |
| byte[] writeBuffer = new byte[8192]; |
| Random random = new Random(); |
| for (int i = 0; i < uncompressedSize; i += writeBuffer.length) { |
| random.nextBytes(writeBuffer); |
| out.write(writeBuffer, 0, Math.min(writeBuffer.length, uncompressedSize - i)); |
| } |
| |
| out.closeEntry(); |
| out.close(); |
| return result; |
| } |
| } |