org.spearce.jgit.test/tst/org/spearce/jgit/lib/PackReverseIndexTest.java

   1 /*
   2  * Copyright (C) 2008, Marek Zawirski <marek.zawirski@gmail.com>
   3  *
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or
   7  * without modification, are permitted provided that the following
   8  * conditions are met:
   9  *
  10  * - Redistributions of source code must retain the above copyright
  11  *   notice, this list of conditions and the following disclaimer.
  12  *
  13  * - Redistributions in binary form must reproduce the above
  14  *   copyright notice, this list of conditions and the following
  15  *   disclaimer in the documentation and/or other materials provided
  16  *   with the distribution.
  17  *
  18  * - Neither the name of the Git Development Community nor the
  19  *   names of its contributors may be used to endorse or promote
  20  *   products derived from this software without specific prior
  21  *   written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  24  * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
  25  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  26  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  28  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  29  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  30  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  31  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  32  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  33  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  35  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 package org.spearce.jgit.lib;
  39
  40 import java.io.File;
  41
  42 import org.spearce.jgit.errors.CorruptObjectException;
  43 import org.spearce.jgit.lib.PackIndex.MutableEntry;
  44
  45 public class PackReverseIndexTest extends RepositoryTestCase {
  46
  47         private PackIndex idx;
  48
  49         private PackReverseIndex reverseIdx;
  50
  51         /**
  52          * Set up tested class instance, test constructor by the way.
  53          */
  54         public void setUp() throws Exception {
  55                 super.setUp();
  56                 // index with both small (< 2^31) and big offsets
  57                 idx = PackIndex.open(new File(new File("tst"),
  58                                 "pack-huge.idx"));
  59                 reverseIdx = new PackReverseIndex(idx);
  60         }
  61
  62         /**
  63          * Test findObject() for all index entries.
  64          */
  65         public void testFindObject() {
  66                 for (MutableEntry me : idx)
  67                         assertEquals(me.toObjectId(), reverseIdx.findObject(me.getOffset()));
  68         }
  69
  70         /**
  71          * Test findObject() with illegal argument.
  72          */
  73         public void testFindObjectWrongOffset() {
  74                 assertNull(reverseIdx.findObject(0));
  75         }
  76
  77         /**
  78          * Test findNextOffset() for all index entries.
  79          *
  80          * @throws CorruptObjectException
  81          */
  82         public void testFindNextOffset() throws CorruptObjectException {
  83                 long offset = findFirstOffset();
  84                 assertTrue(offset > 0);
  85                 for (int i = 0; i < idx.getObjectCount(); i++) {
  86                         long newOffset = reverseIdx.findNextOffset(offset, Long.MAX_VALUE);
  87                         assertTrue(newOffset > offset);
  88                         if (i == idx.getObjectCount() - 1)
  89                                 assertEquals(newOffset, Long.MAX_VALUE);
  90                         else
  91                                 assertEquals(newOffset, idx.findOffset(reverseIdx
  92                                                 .findObject(newOffset)));
  93                         offset = newOffset;
  94                 }
  95         }
  96
  97         /**
  98          * Test findNextOffset() with wrong illegal argument as offset.
  99          */
 100         public void testFindNextOffsetWrongOffset() {
 101                 try {
 102                         reverseIdx.findNextOffset(0, Long.MAX_VALUE);
 103                         fail("findNextOffset() should throw exception");
 104                 } catch (CorruptObjectException x) {
 105                         // expected
 106                 }
 107         }
 108
 109         private long findFirstOffset() {
 110                 long min = Long.MAX_VALUE;
 111                 for (MutableEntry me : idx)
 112                         min = Math.min(min, me.getOffset());
 113                 return min;
 114         }
 115 }