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1   /**
2    * Copyright (c) 2004-2011 QOS.ch
3    * All rights reserved.
4    *
5    * Permission is hereby granted, free  of charge, to any person obtaining
6    * a  copy  of this  software  and  associated  documentation files  (the
7    * "Software"), to  deal in  the Software without  restriction, including
8    * without limitation  the rights to  use, copy, modify,  merge, publish,
9    * distribute,  sublicense, and/or sell  copies of  the Software,  and to
10   * permit persons to whom the Software  is furnished to do so, subject to
11   * the following conditions:
12   *
13   * The  above  copyright  notice  and  this permission  notice  shall  be
14   * included in all copies or substantial portions of the Software.
15   *
16   * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
17   * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
18   * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
19   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20   * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21   * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
22   * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23   *
24   */
25  package org.slf4j.migrator.helper;
26  
27  import org.slf4j.migrator.helper.Abbreviator;
28  
29  import junit.framework.TestCase;
30  
31  public class AbbreviatorTest extends TestCase {
32  
33      static final char FS = '/';
34      static final String INPUT_0 = "/abc/123456/ABC";
35      static final String INPUT_1 = "/abc/123456/xxxxx/ABC";
36  
37      RandomHelper rh = new RandomHelper(FS);
38  
39      public AbbreviatorTest(String arg0) {
40          super(arg0);
41      }
42  
43      protected void setUp() throws Exception {
44          super.setUp();
45      }
46  
47      protected void tearDown() throws Exception {
48          super.tearDown();
49      }
50  
51      public void testSmoke() {
52          {
53              Abbreviator abb = new Abbreviator(2, 100, FS);
54              String r = abb.abbreviate(INPUT_0);
55              assertEquals(INPUT_0, r);
56          }
57  
58          {
59              Abbreviator abb = new Abbreviator(3, 8, FS);
60              String r = abb.abbreviate(INPUT_0);
61              assertEquals("/abc/.../ABC", r);
62          }
63          {
64              Abbreviator abb = new Abbreviator(3, 8, FS);
65              String r = abb.abbreviate(INPUT_0);
66              assertEquals("/abc/.../ABC", r);
67          }
68      }
69  
70      public void testImpossibleToAbbreviate() {
71          Abbreviator abb = new Abbreviator(2, 20, FS);
72          String in = "iczldqwivpgm/mgrmvbjdxrwmqgprdjusth";
73          String r = abb.abbreviate(in);
74          assertEquals(in, r);
75      }
76  
77      public void testNoFS() {
78          Abbreviator abb = new Abbreviator(2, 100, FS);
79          String r = abb.abbreviate("hello");
80          assertEquals("hello", r);
81  
82      }
83  
84      public void testZeroPrefix() {
85          {
86              Abbreviator abb = new Abbreviator(0, 100, FS);
87              String r = abb.abbreviate(INPUT_0);
88              assertEquals(INPUT_0, r);
89          }
90      }
91  
92      public void testTheories() {
93          int MAX_RANDOM_FIXED_LEN = 20;
94          int MAX_RANDOM_AVG_LEN = 20;
95          int MAX_RANDOM_MAX_LEN = 100;
96          for (int i = 0; i < 10000; i++) {
97  
98              // System.out.println("Test number " + i);
99  
100             // 0 <= fixedLen < MAX_RANDOM_FIXED_LEN
101             int fixedLen = rh.nextInt(MAX_RANDOM_FIXED_LEN);
102             // 5 <= averageLen < MAX_RANDOM_AVG_LEN
103             int averageLen = rh.nextInt(MAX_RANDOM_AVG_LEN) + 3;
104             // System.out.println("fixedLen="+fixedLen+", averageLen="+averageLen);
105 
106             int maxLen = rh.nextInt(MAX_RANDOM_MAX_LEN) + fixedLen;
107             if (maxLen <= 1) {
108                 continue;
109             }
110             // System.out.println("maxLen="+maxLen);
111             int targetLen = (maxLen / 2) + rh.nextInt(maxLen / 2) + 1;
112 
113             if (targetLen > maxLen) {
114                 targetLen = maxLen;
115             }
116             String filename = rh.buildRandomFileName(averageLen, maxLen);
117 
118             Abbreviator abb = new Abbreviator(fixedLen, targetLen, FS);
119             String result = abb.abbreviate(filename);
120             assertTheory0(averageLen, filename, result, fixedLen, targetLen);
121             assertUsefulness(averageLen, filename, result, fixedLen, targetLen);
122             assertTheory1(filename, result, fixedLen, targetLen);
123             assertTheory2(filename, result, fixedLen, targetLen);
124         }
125     }
126 
127     // result length is smaller than original length
128     void assertTheory0(int averageLen, String filename, String result, int fixedLen, int targetLength) {
129         assertTrue("filename=[" + filename + "] result=[" + result + "]", result.length() <= filename.length());
130     }
131 
132     // if conditions allow, result length should be to target length
133     void assertUsefulness(int averageLen, String filename, String result, int fixedLen, int targetLength) {
134         int resLen = result.length();
135 
136         int margin = averageLen * 4;
137         if (targetLength > fixedLen + margin) {
138             assertTrue("filename=[" + filename + "], result=[" + result + "] resultLength=" + resLen + " fixedLength=" + fixedLen + ", targetLength="
139                             + targetLength + ", avgLen=" + averageLen, result.length() <= targetLength + averageLen);
140         }
141     }
142 
143     // result start with prefix found in filename
144     void assertTheory1(String filename, String result, int fixedLen, int targetLength) {
145         String prefix = filename.substring(0, fixedLen);
146         assertTrue(result.startsWith(prefix));
147     }
148 
149     // The string /.../ is found in the result once at a position higher
150     // than fixedLen
151     void assertTheory2(String filename, String result, int fixedLen, int targetLength) {
152         if (filename == result) {
153             return;
154         }
155         int fillerIndex = result.indexOf(Abbreviator.FILLER);
156         assertTrue(fillerIndex >= fixedLen);
157     }
158 }