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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   * http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  
20  package org.apache.commons.compress.archivers.zip;
21  
22  import java.io.IOException;
23  import java.nio.ByteBuffer;
24  
25  import junit.framework.TestCase;
26  
27  import org.apache.commons.compress.utils.CharsetNames;
28  
29  /**
30   * Test zip encodings.
31   */
32  public class TestZipEncodings extends TestCase {
33      private static final String UNENC_STRING = "\u2016";
34  
35      // stress test for internal grow method.
36      private static final String BAD_STRING =
37          "\u2016\u2015\u2016\u2015\u2016\u2015\u2016\u2015\u2016\u2015\u2016";
38  
39      private static final String BAD_STRING_ENC =
40          "%U2016%U2015%U2016%U2015%U2016%U2015%U2016%U2015%U2016%U2015%U2016";
41  
42      public void testSimpleCp437Encoding() throws IOException {
43  
44          doSimpleEncodingTest("Cp437", null);
45      }
46  
47      public void testSimpleCp850Encoding() throws IOException {
48  
49          doSimpleEncodingTest("Cp850", null);
50      }
51  
52      public void testNioCp1252Encoding() throws IOException {
53          // CP1252 has some undefined code points, these are
54          // the defined ones
55          // retrieved by
56          //    awk '/^0x/ && NF>2 {print $1;}' CP1252.TXT
57          byte[] b =
58              new byte[] { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
59                           0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
60                           0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
61                           0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
62                           0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
63                           0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
64                           0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
65                           0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
66                           0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
67                           0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F,
68                           0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
69                           0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F,
70                           0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
71                           0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
72                           0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
73                           0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F,
74                           (byte) 0x80, (byte) 0x82, (byte) 0x83, (byte) 0x84,
75                           (byte) 0x85, (byte) 0x86, (byte) 0x87, (byte) 0x88,
76                           (byte) 0x89, (byte) 0x8A, (byte) 0x8B, (byte) 0x8C,
77                           (byte) 0x8E, (byte) 0x91, (byte) 0x92, (byte) 0x93,
78                           (byte) 0x94, (byte) 0x95, (byte) 0x96, (byte) 0x97,
79                           (byte) 0x98, (byte) 0x99, (byte) 0x9A, (byte) 0x9B,
80                           (byte) 0x9C, (byte) 0x9E, (byte) 0x9F, (byte) 0xA0,
81                           (byte) 0xA1, (byte) 0xA2, (byte) 0xA3, (byte) 0xA4,
82                           (byte) 0xA5, (byte) 0xA6, (byte) 0xA7, (byte) 0xA8,
83                           (byte) 0xA9, (byte) 0xAA, (byte) 0xAB, (byte) 0xAC,
84                           (byte) 0xAD, (byte) 0xAE, (byte) 0xAF, (byte) 0xB0,
85                           (byte) 0xB1, (byte) 0xB2, (byte) 0xB3, (byte) 0xB4,
86                           (byte) 0xB5, (byte) 0xB6, (byte) 0xB7, (byte) 0xB8,
87                           (byte) 0xB9, (byte) 0xBA, (byte) 0xBB, (byte) 0xBC,
88                           (byte) 0xBD, (byte) 0xBE, (byte) 0xBF, (byte) 0xC0,
89                           (byte) 0xC1, (byte) 0xC2, (byte) 0xC3, (byte) 0xC4,
90                           (byte) 0xC5, (byte) 0xC6, (byte) 0xC7, (byte) 0xC8,
91                           (byte) 0xC9, (byte) 0xCA, (byte) 0xCB, (byte) 0xCC,
92                           (byte) 0xCD, (byte) 0xCE, (byte) 0xCF, (byte) 0xD0,
93                           (byte) 0xD1, (byte) 0xD2, (byte) 0xD3, (byte) 0xD4,
94                           (byte) 0xD5, (byte) 0xD6, (byte) 0xD7, (byte) 0xD8,
95                           (byte) 0xD9, (byte) 0xDA, (byte) 0xDB, (byte) 0xDC,
96                           (byte) 0xDD, (byte) 0xDE, (byte) 0xDF, (byte) 0xE0,
97                           (byte) 0xE1, (byte) 0xE2, (byte) 0xE3, (byte) 0xE4,
98                           (byte) 0xE5, (byte) 0xE6, (byte) 0xE7, (byte) 0xE8,
99                           (byte) 0xE9, (byte) 0xEA, (byte) 0xEB, (byte) 0xEC,
100                          (byte) 0xED, (byte) 0xEE, (byte) 0xEF, (byte) 0xF0,
101                          (byte) 0xF1, (byte) 0xF2, (byte) 0xF3, (byte) 0xF4,
102                          (byte) 0xF5, (byte) 0xF6, (byte) 0xF7, (byte) 0xF8,
103                          (byte) 0xF9, (byte) 0xFA, (byte) 0xFB, (byte) 0xFC,
104                          (byte) 0xFD, (byte) 0xFE, (byte) 0xFF };
105 
106         doSimpleEncodingTest("Cp1252",b);
107     }
108 
109     private static final void assertEquals(byte[] expected, ByteBuffer actual) {
110 
111         assertEquals(expected.length, actual.limit());
112 
113         for (int i = 0; i < expected.length; ++i) {
114 
115             byte a = actual.get();
116             assertEquals(expected[i], a);
117         }
118 
119     }
120 
121     private void doSimpleEncodingTest(String name, byte[] testBytes)
122         throws IOException {
123 
124         ZipEncoding enc = ZipEncodingHelper.getZipEncoding(name);
125 
126         if (testBytes == null) {
127 
128             testBytes = new byte[256];
129             for (int i = 0; i < 256; ++i) {
130                 testBytes[i] = (byte) i;
131             }
132         }
133 
134         String decoded = enc.decode(testBytes);
135 
136         assertEquals(true, enc.canEncode(decoded));
137 
138         ByteBuffer encoded = enc.encode(decoded);
139 
140         assertEquals(testBytes, encoded);
141 
142         assertEquals(false, enc.canEncode(UNENC_STRING));
143         assertEquals("%U2016".getBytes(CharsetNames.US_ASCII), enc.encode(UNENC_STRING));
144         assertEquals(false, enc.canEncode(BAD_STRING));
145         assertEquals(BAD_STRING_ENC.getBytes(CharsetNames.US_ASCII),
146                      enc.encode(BAD_STRING));
147     }
148 
149 }