1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package libcore.java.util.zip; 18 19 import libcore.io.Streams; 20 import tests.support.resource.Support_Resources; 21 22 import java.io.ByteArrayInputStream; 23 import java.io.ByteArrayOutputStream; 24 import java.io.IOException; 25 import java.io.InputStream; 26 import java.util.Arrays; 27 import java.util.Random; 28 import java.util.zip.ZipEntry; 29 import java.util.zip.ZipInputStream; 30 import java.util.zip.ZipOutputStream; 31 import libcore.junit.junit3.TestCaseWithRules; 32 import libcore.junit.util.ResourceLeakageDetector; 33 import org.junit.Rule; 34 import org.junit.rules.TestRule; 35 36 public final class ZipInputStreamTest extends TestCaseWithRules { 37 @Rule 38 public TestRule guardRule = ResourceLeakageDetector.getRule(); 39 40 public void testShortMessage() throws IOException { 41 byte[] data = "Hello World".getBytes("UTF-8"); 42 byte[] zipped = ZipOutputStreamTest.zip("short", data); 43 assertEquals(Arrays.toString(data), Arrays.toString(unzip("short", zipped))); 44 } 45 46 public void testLongMessage() throws IOException { 47 byte[] data = new byte[1024 * 1024]; 48 new Random().nextBytes(data); 49 assertTrue(Arrays.equals(data, unzip("r", ZipOutputStreamTest.zip("r", data)))); 50 } 51 52 public static byte[] unzip(String name, byte[] bytes) throws IOException { 53 ZipInputStream in = new ZipInputStream(new ByteArrayInputStream(bytes)); 54 ByteArrayOutputStream out = new ByteArrayOutputStream(); 55 56 ZipEntry entry = in.getNextEntry(); 57 assertEquals(name, entry.getName()); 58 59 byte[] buffer = new byte[1024]; 60 int count; 61 while ((count = in.read(buffer)) != -1) { 62 out.write(buffer, 0, count); 63 } 64 65 assertNull(in.getNextEntry()); // There's only one entry in the Zip files we create. 66 67 in.close(); 68 return out.toByteArray(); 69 } 70 71 /** 72 * Reference implementation allows reading of empty zip using a {@link ZipInputStream}. 73 */ 74 public void testReadEmpty() throws IOException { 75 InputStream emptyZipIn = Support_Resources.getStream("java/util/zip/EmptyArchive.zip"); 76 ZipInputStream in = new ZipInputStream(emptyZipIn); 77 try { 78 ZipEntry entry = in.getNextEntry(); 79 assertNull("An empty zip has no entries", entry); 80 } finally { 81 in.close(); 82 } 83 } 84 85 // NOTE: Using octal because it's easiest to use "hexdump -b" to dump file contents. 86 private static final byte[] INCOMPLETE_ZIP = new byte[] { 87 0120, 0113, 0003, 0004, 0024, 0000, 0010, 0010, 0010, 0000, 0002, 0035, (byte) 0330, 88 0106, 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0013, 89 0000, 0000, 0000, 0146, 0157, 0157, 0057, 0142, 0141, 0162, 0056, 0160, 0156, 0147 }; 90 91 // http://b//21846904 92 public void testReadOnIncompleteStream() throws Exception { 93 ZipInputStream zi = new ZipInputStream(new ByteArrayInputStream(INCOMPLETE_ZIP)); 94 ZipEntry ze = zi.getNextEntry(); 95 96 // read() and closeEntry() must throw IOExceptions to indicate that 97 // the stream is corrupt. The bug above reported that they would loop 98 // forever. 99 try { 100 zi.read(new byte[1024], 0, 1024); 101 fail(); 102 } catch (IOException expected) { 103 } 104 105 try { 106 zi.closeEntry(); 107 fail(); 108 } catch (IOException expected) { 109 } 110 111 zi.close(); 112 } 113 114 public void testAvailable() throws Exception { 115 // NOTE: We don't care about the contents of any of these entries as long as they're 116 // not empty. 117 ZipInputStream zis = new ZipInputStream(new ByteArrayInputStream( 118 zip(new String[] { "foo", "bar", "baz" }, new byte[] { 0, 0, 0, 1, 1, 1 }))); 119 120 assertEquals(1, zis.available()); 121 zis.getNextEntry(); 122 assertEquals(1, zis.available()); 123 zis.closeEntry(); 124 // On Android M and below, this call would return "1". That seems a bit odd given that the 125 // contract for available states that we should return 1 if there are any bytes left to read 126 // from the "current" entry. 127 assertEquals(0, zis.available()); 128 129 // There shouldn't be any bytes left to read if the entry is fully consumed... 130 zis.getNextEntry(); 131 Streams.readFullyNoClose(zis); 132 assertEquals(0, zis.available()); 133 134 // ... or if the entry is fully skipped over. 135 zis.getNextEntry(); 136 zis.skip(Long.MAX_VALUE); 137 assertEquals(0, zis.available()); 138 139 // There are no entries left in the file, so there whould be nothing left to read. 140 assertNull(zis.getNextEntry()); 141 assertEquals(0, zis.available()); 142 143 zis.close(); 144 } 145 146 private static byte[] zip(String[] names, byte[] bytes) throws IOException { 147 ByteArrayOutputStream bytesOut = new ByteArrayOutputStream(); 148 ZipOutputStream zippedOut = new ZipOutputStream(bytesOut); 149 150 for (String name : names) { 151 ZipEntry entry = new ZipEntry(name); 152 zippedOut.putNextEntry(entry); 153 zippedOut.write(bytes); 154 zippedOut.closeEntry(); 155 } 156 157 zippedOut.close(); 158 return bytesOut.toByteArray(); 159 } 160 } 161
