1 /* 2 * Copyright 2013, Google Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: 8 * 9 * * Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * * Redistributions in binary form must reproduce the above 12 * copyright notice, this list of conditions and the following disclaimer 13 * in the documentation and/or other materials provided with the 14 * distribution. 15 * * Neither the name of Google Inc. nor the names of its 16 * contributors may be used to endorse or promote products derived from 17 * this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 package org.jf.util; 33 34 import com.google.common.base.Strings; 35 import com.google.common.io.Files; 36 import junit.framework.Assert; 37 import org.junit.Test; 38 39 import java.io.File; 40 import java.nio.charset.Charset; 41 42 public class ClassFileNameHandlerTest { 43 private final Charset UTF8 = Charset.forName("UTF-8"); 44 45 @Test 46 public void test1ByteEncodings() { 47 StringBuilder sb = new StringBuilder(); 48 for (int i=0; i<100; i++) { 49 sb.append((char)i); 50 } 51 52 String result = ClassFileNameHandler.shortenPathComponent(sb.toString(), 5); 53 Assert.assertEquals(95, result.getBytes(UTF8).length); 54 Assert.assertEquals(95, result.length()); 55 } 56 57 @Test 58 public void test2ByteEncodings() { 59 StringBuilder sb = new StringBuilder(); 60 for (int i=0x80; i<0x80+100; i++) { 61 sb.append((char)i); 62 } 63 64 // remove a total of 3 2-byte characters, and then add back in the 1-byte '#' 65 String result = ClassFileNameHandler.shortenPathComponent(sb.toString(), 4); 66 Assert.assertEquals(200, sb.toString().getBytes(UTF8).length); 67 Assert.assertEquals(195, result.getBytes(UTF8).length); 68 Assert.assertEquals(98, result.length()); 69 70 // remove a total of 3 2-byte characters, and then add back in the 1-byte '#' 71 result = ClassFileNameHandler.shortenPathComponent(sb.toString(), 5); 72 Assert.assertEquals(200, sb.toString().getBytes(UTF8).length); 73 Assert.assertEquals(195, result.getBytes(UTF8).length); 74 Assert.assertEquals(98, result.length()); 75 } 76 77 @Test 78 public void test3ByteEncodings() { 79 StringBuilder sb = new StringBuilder(); 80 for (int i=0x800; i<0x800+100; i++) { 81 sb.append((char)i); 82 } 83 84 // remove a total of 3 3-byte characters, and then add back in the 1-byte '#' 85 String result = ClassFileNameHandler.shortenPathComponent(sb.toString(), 6); 86 Assert.assertEquals(300, sb.toString().getBytes(UTF8).length); 87 Assert.assertEquals(292, result.getBytes(UTF8).length); 88 Assert.assertEquals(98, result.length()); 89 90 // remove a total of 3 3-byte characters, and then add back in the 1-byte '#' 91 result = ClassFileNameHandler.shortenPathComponent(sb.toString(), 7); 92 Assert.assertEquals(300, sb.toString().getBytes(UTF8).length); 93 Assert.assertEquals(292, result.getBytes(UTF8).length); 94 Assert.assertEquals(98, result.length()); 95 } 96 97 @Test 98 public void test4ByteEncodings() { 99 StringBuilder sb = new StringBuilder(); 100 for (int i=0x10000; i<0x10000+100; i++) { 101 sb.appendCodePoint(i); 102 } 103 104 // we remove 3 codepoints == 6 characters == 12 bytes, and then add back in the 1-byte '#' 105 String result = ClassFileNameHandler.shortenPathComponent(sb.toString(), 8); 106 Assert.assertEquals(400, sb.toString().getBytes(UTF8).length); 107 Assert.assertEquals(389, result.getBytes(UTF8).length); 108 Assert.assertEquals(195, result.length()); 109 110 // we remove 2 codepoints == 4 characters == 8 bytes, and then add back in the 1-byte '#' 111 result = ClassFileNameHandler.shortenPathComponent(sb.toString(), 7); 112 Assert.assertEquals(400, sb.toString().getBytes(UTF8).length); 113 Assert.assertEquals(393, result.getBytes(UTF8).length); 114 Assert.assertEquals(197, result.length()); 115 } 116 117 @Test 118 public void testMultipleLongNames() { 119 String filenameFragment = Strings.repeat("a", 512); 120 121 File tempDir = Files.createTempDir(); 122 ClassFileNameHandler handler = new ClassFileNameHandler(tempDir, ".smali"); 123 124 // put the differentiating character in the middle, where it will get stripped out by the filename shortening 125 // logic 126 File file1 = handler.getUniqueFilenameForClass("La/a/" + filenameFragment + "1" + filenameFragment + ";"); 127 checkFilename(tempDir, file1, "a", "a", Strings.repeat("a", 124) + "#" + Strings.repeat("a", 118) + ".smali"); 128 129 File file2 = handler.getUniqueFilenameForClass("La/a/" + filenameFragment + "2" + filenameFragment + ";"); 130 checkFilename(tempDir, file2, "a", "a", Strings.repeat("a", 124) + "#" + Strings.repeat("a", 118) + ".1.smali"); 131 132 Assert.assertFalse(file1.getAbsolutePath().equals(file2.getAbsolutePath())); 133 } 134 135 @Test 136 public void testBasicFunctionality() { 137 File tempDir = Files.createTempDir(); 138 ClassFileNameHandler handler = new ClassFileNameHandler(tempDir, ".smali"); 139 140 File file = handler.getUniqueFilenameForClass("La/b/c/d;"); 141 checkFilename(tempDir, file, "a", "b", "c", "d.smali"); 142 143 file = handler.getUniqueFilenameForClass("La/b/c/e;"); 144 checkFilename(tempDir, file, "a", "b", "c", "e.smali"); 145 146 file = handler.getUniqueFilenameForClass("La/b/d/d;"); 147 checkFilename(tempDir, file, "a", "b", "d", "d.smali"); 148 149 file = handler.getUniqueFilenameForClass("La/b;"); 150 checkFilename(tempDir, file, "a", "b.smali"); 151 152 file = handler.getUniqueFilenameForClass("Lb;"); 153 checkFilename(tempDir, file, "b.smali"); 154 } 155 156 @Test 157 public void testCaseInsensitiveFilesystem() { 158 File tempDir = Files.createTempDir(); 159 ClassFileNameHandler handler = new ClassFileNameHandler(tempDir, ".smali", false, false); 160 161 File file = handler.getUniqueFilenameForClass("La/b/c;"); 162 checkFilename(tempDir, file, "a", "b", "c.smali"); 163 164 file = handler.getUniqueFilenameForClass("La/b/C;"); 165 checkFilename(tempDir, file, "a", "b", "C.1.smali"); 166 167 file = handler.getUniqueFilenameForClass("La/B/c;"); 168 checkFilename(tempDir, file, "a", "B.1", "c.smali"); 169 } 170 171 @Test 172 public void testCaseSensitiveFilesystem() { 173 File tempDir = Files.createTempDir(); 174 ClassFileNameHandler handler = new ClassFileNameHandler(tempDir, ".smali", true, false); 175 176 File file = handler.getUniqueFilenameForClass("La/b/c;"); 177 checkFilename(tempDir, file, "a", "b", "c.smali"); 178 179 file = handler.getUniqueFilenameForClass("La/b/C;"); 180 checkFilename(tempDir, file, "a", "b", "C.smali"); 181 182 file = handler.getUniqueFilenameForClass("La/B/c;"); 183 checkFilename(tempDir, file, "a", "B", "c.smali"); 184 } 185 186 @Test 187 public void testWindowsReservedFilenames() { 188 File tempDir = Files.createTempDir(); 189 ClassFileNameHandler handler = new ClassFileNameHandler(tempDir, ".smali", false, true); 190 191 File file = handler.getUniqueFilenameForClass("La/con/c;"); 192 checkFilename(tempDir, file, "a", "con#", "c.smali"); 193 194 file = handler.getUniqueFilenameForClass("La/Con/c;"); 195 checkFilename(tempDir, file, "a", "Con#.1", "c.smali"); 196 197 file = handler.getUniqueFilenameForClass("La/b/PRN;"); 198 checkFilename(tempDir, file, "a", "b", "PRN#.smali"); 199 200 file = handler.getUniqueFilenameForClass("La/b/prN;"); 201 checkFilename(tempDir, file, "a", "b", "prN#.1.smali"); 202 203 file = handler.getUniqueFilenameForClass("La/b/com0;"); 204 checkFilename(tempDir, file, "a", "b", "com0.smali"); 205 206 for (String reservedName: new String[] {"con", "prn", "aux", "nul", "com1", "com9", "lpt1", "lpt9"}) { 207 file = handler.getUniqueFilenameForClass("L" + reservedName + ";"); 208 checkFilename(tempDir, file, reservedName +"#.smali"); 209 } 210 } 211 212 @Test 213 public void testIgnoringWindowsReservedFilenames() { 214 File tempDir = Files.createTempDir(); 215 ClassFileNameHandler handler = new ClassFileNameHandler(tempDir, ".smali", true, false); 216 217 File file = handler.getUniqueFilenameForClass("La/con/c;"); 218 checkFilename(tempDir, file, "a", "con", "c.smali"); 219 220 file = handler.getUniqueFilenameForClass("La/Con/c;"); 221 checkFilename(tempDir, file, "a", "Con", "c.smali"); 222 223 file = handler.getUniqueFilenameForClass("La/b/PRN;"); 224 checkFilename(tempDir, file, "a", "b", "PRN.smali"); 225 226 file = handler.getUniqueFilenameForClass("La/b/prN;"); 227 checkFilename(tempDir, file, "a", "b", "prN.smali"); 228 229 file = handler.getUniqueFilenameForClass("La/b/com0;"); 230 checkFilename(tempDir, file, "a", "b", "com0.smali"); 231 232 for (String reservedName: new String[] {"con", "prn", "aux", "nul", "com1", "com9", "lpt1", "lpt9"}) { 233 file = handler.getUniqueFilenameForClass("L" + reservedName + ";"); 234 checkFilename(tempDir, file, reservedName +".smali"); 235 } 236 } 237 238 private void checkFilename(File base, File file, String... elements) { 239 for (int i=elements.length-1; i>=0; i--) { 240 Assert.assertEquals(elements[i], file.getName()); 241 file = file.getParentFile(); 242 } 243 Assert.assertEquals(base.getAbsolutePath(), file.getAbsolutePath()); 244 } 245 } 246
