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      1 /*
      2  * Licensed to the Apache Software Foundation (ASF) under one or more
      3  * contributor license agreements.  See the NOTICE file distributed with
      4  * this work for additional information regarding copyright ownership.
      5  * The ASF licenses this file to You under the Apache License, Version 2.0
      6  * (the "License"); you may not use this file except in compliance with
      7  * the License.  You may obtain a copy of the License at
      8  *
      9  *     http://www.apache.org/licenses/LICENSE-2.0
     10  *
     11  * Unless required by applicable law or agreed to in writing, software
     12  * distributed under the License is distributed on an "AS IS" BASIS,
     13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14  * See the License for the specific language governing permissions and
     15  * limitations under the License.
     16  */
     17 package org.apache.harmony.tests.java.util.zip;
     18 
     19 import java.util.zip.CRC32;
     20 
     21 public class CRC32Test extends junit.framework.TestCase {
     22 
     23     /**
     24      * java.util.zip.CRC32#CRC32()
     25      */
     26     public void test_Constructor() {
     27         // test methods of java.util.zip.CRC32()
     28         CRC32 crc = new CRC32();
     29         assertEquals("Constructor of CRC32 failed", 0, crc.getValue());
     30     }
     31 
     32     /**
     33      * java.util.zip.CRC32#getValue()
     34      */
     35     public void test_getValue() {
     36         // test methods of java.util.zip.crc32.getValue()
     37         CRC32 crc = new CRC32();
     38         assertEquals("getValue() should return a zero as a result of constructing a CRC32 instance",
     39                 0, crc.getValue());
     40 
     41         crc.reset();
     42         crc.update(Integer.MAX_VALUE);
     43         // System.out.print("value of crc " + crc.getValue());
     44         // Ran JDK and discovered that the value of the CRC should be
     45         // 4278190080
     46         assertEquals("update(max) failed to update the checksum to the correct value ",
     47                 4278190080L, crc.getValue());
     48 
     49         crc.reset();
     50         byte byteEmpty[] = new byte[10000];
     51         crc.update(byteEmpty);
     52         // System.out.print("value of crc"+crc.getValue());
     53         // Ran JDK and discovered that the value of the CRC should be
     54         // 1295764014
     55         assertEquals("update(byte[]) failed to update the checksum to the correct value ",
     56                 1295764014L, crc.getValue());
     57 
     58         crc.reset();
     59         crc.update(1);
     60         // System.out.print("value of crc"+crc.getValue());
     61         // Ran JDK and discovered that the value of the CRC should be
     62         // 2768625435
     63         // assertEquals("update(int) failed to update the checksum to the correct
     64         // value ",2768625435L, crc.getValue());
     65         crc.reset();
     66         assertEquals("reset failed to reset the checksum value to zero", 0, crc
     67                 .getValue());
     68     }
     69 
     70     /**
     71      * java.util.zip.CRC32#reset()
     72      */
     73     public void test_reset() {
     74         // test methods of java.util.zip.crc32.reset()
     75         CRC32 crc = new CRC32();
     76         crc.update(1);
     77         // System.out.print("value of crc"+crc.getValue());
     78         // Ran JDK and discovered that the value of the CRC should be
     79         // 2768625435
     80         assertEquals("update(int) failed to update the checksum to the correct value ",
     81                 2768625435L, crc.getValue());
     82         crc.reset();
     83         assertEquals("reset failed to reset the checksum value to zero", 0, crc
     84                 .getValue());
     85 
     86     }
     87 
     88     /**
     89      * java.util.zip.CRC32#update(int)
     90      */
     91     public void test_updateI() {
     92         // test methods of java.util.zip.crc32.update(int)
     93         CRC32 crc = new CRC32();
     94         crc.update(1);
     95         // System.out.print("value of crc"+crc.getValue());
     96         // Ran JDK and discovered that the value of the CRC should be
     97         // 2768625435
     98         assertEquals("update(1) failed to update the checksum to the correct value ",
     99                 2768625435L, crc.getValue());
    100 
    101         crc.reset();
    102         crc.update(Integer.MAX_VALUE);
    103         // System.out.print("value of crc " + crc.getValue());
    104         // Ran JDK and discovered that the value of the CRC should be
    105         // 4278190080
    106         assertEquals("update(max) failed to update the checksum to the correct value ",
    107                 4278190080L, crc.getValue());
    108 
    109         crc.reset();
    110         crc.update(Integer.MIN_VALUE);
    111         // System.out.print("value of crc " + crc.getValue());
    112         // Ran JDK and discovered that the value of the CRC should be
    113         // 3523407757
    114         assertEquals("update(min) failed to update the checksum to the correct value ",
    115                 3523407757L, crc.getValue());
    116     }
    117 
    118     /**
    119      * java.util.zip.CRC32#update(byte[])
    120      */
    121     public void test_update$B() {
    122         // test methods of java.util.zip.crc32.update(byte[])
    123         byte byteArray[] = { 1, 2 };
    124         CRC32 crc = new CRC32();
    125         crc.update(byteArray);
    126         // System.out.print("value of crc"+crc.getValue());
    127         // Ran JDK and discovered that the value of the CRC should be
    128         // 3066839698
    129         assertEquals("update(byte[]) failed to update the checksum to the correct value ",
    130                 3066839698L, crc.getValue());
    131 
    132         crc.reset();
    133         byte byteEmpty[] = new byte[10000];
    134         crc.update(byteEmpty);
    135         // System.out.print("value of crc"+crc.getValue());
    136         // Ran JDK and discovered that the value of the CRC should be
    137         // 1295764014
    138         assertEquals("update(byte[]) failed to update the checksum to the correct value ",
    139                 1295764014L, crc.getValue());
    140     }
    141 
    142     /**
    143      * java.util.zip.CRC32#update(byte[], int, int)
    144      */
    145     public void test_update$BII() {
    146         // test methods of java.util.zip.update(byte[],int,int)
    147         byte[] byteArray = { 1, 2, 3 };
    148         CRC32 crc = new CRC32();
    149         int off = 2;// accessing the 2nd element of byteArray
    150         int len = 1;
    151         int lenError = 3;
    152         int offError = 4;
    153         crc.update(byteArray, off, len);
    154         // System.out.print("value of crc"+crc.getValue());
    155         // Ran JDK and discovered that the value of the CRC should be
    156         // 1259060791
    157         assertEquals("update(byte[],int,int) failed to update the checksum to the correct value ",
    158                 1259060791L, crc.getValue());
    159         int r = 0;
    160         try {
    161             crc.update(byteArray, off, lenError);
    162         } catch (ArrayIndexOutOfBoundsException e) {
    163             r = 1;
    164         }
    165         assertEquals("update(byte[],int,int) failed b/c lenError>byte[].length-off",
    166                 1, r);
    167 
    168         try {
    169             crc.update(byteArray, offError, len);
    170         } catch (ArrayIndexOutOfBoundsException e) {
    171             r = 2;
    172         }
    173         assertEquals("update(byte[],int,int) failed b/c offError>byte[].length",
    174                 2, r);
    175     }
    176 
    177     @Override
    178     protected void setUp() {
    179 
    180     }
    181 
    182     @Override
    183     protected void tearDown() {
    184     }
    185 
    186 }
    187