org.spearce.jgit.test/exttst/org/spearce/jgit/lib/SpeedTestBase.java

   1 /*
   2  * Copyright (C) 2007, Robin Rosenberg <robin.rosenberg@dewire.com>
   3  * Copyright (C) 2007, Shawn O. Pearce <spearce@spearce.org>
   4  *
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or
   8  * without modification, are permitted provided that the following
   9  * conditions are met:
  10  *
  11  * - Redistributions of source code must retain the above copyright
  12  *   notice, this list of conditions and the following disclaimer.
  13  *
  14  * - Redistributions in binary form must reproduce the above
  15  *   copyright notice, this list of conditions and the following
  16  *   disclaimer in the documentation and/or other materials provided
  17  *   with the distribution.
  18  *
  19  * - Neither the name of the Git Development Community nor the
  20  *   names of its contributors may be used to endorse or promote
  21  *   products derived from this software without specific prior
  22  *   written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  25  * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
  26  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  27  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  28  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  29  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  30  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  31  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  32  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  33  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  34  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  36  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37  */
  38
  39 package org.spearce.jgit.lib;
  40
  41 import java.io.BufferedReader;
  42 import java.io.File;
  43 import java.io.FileReader;
  44 import java.io.IOException;
  45 import java.io.InputStream;
  46
  47 import junit.framework.TestCase;
  48
  49 /**
  50  * Base class for performance unit test.
  51  */
  52 public abstract class SpeedTestBase extends TestCase {
  53
  54         /**
  55          * The time used by native git as this is our reference.
  56          */
  57         protected long nativeTime;
  58
  59         /**
  60          * Reference to the location of the Linux kernel repo.
  61          */
  62         protected String kernelrepo;
  63
  64         /**
  65          * Prepare test by running a test against the Linux kernel repo first.
  66          *
  67          * @param refcmd
  68          *            git command to execute
  69          *
  70          * @throws Exception
  71          */
  72         protected void prepare(String[] refcmd) throws Exception {
  73                 try {
  74                         BufferedReader bufferedReader = new BufferedReader(new FileReader("kernel.ref"));
  75                         try {
  76                                 kernelrepo = bufferedReader.readLine();
  77                                 bufferedReader.close();
  78                                 timeNativeGit(kernelrepo, refcmd);
  79                                 nativeTime = timeNativeGit(kernelrepo, refcmd);
  80                         } finally {
  81                                 bufferedReader.close();
  82                         }
  83                 } catch (Exception e) {
  84                         System.out.println("Create a file named kernel.ref and put the path to the Linux kernels repository there");
  85                         throw e;
  86                 }
  87         }
  88
  89         private static long timeNativeGit(String kernelrepo, String[] refcmd) throws IOException,
  90                         InterruptedException, Exception {
  91                 long start = System.currentTimeMillis();
  92                 Process p = Runtime.getRuntime().exec(refcmd, null, new File(kernelrepo,".."));
  93                 InputStream inputStream = p.getInputStream();
  94                 InputStream errorStream = p.getErrorStream();
  95                 byte[] buf=new byte[1024*1024];
  96                 for (;;)
  97                         if (inputStream.read(buf) < 0)
  98                                 break;
  99                 if (p.waitFor()!=0) {
 100                         int c;
 101                         while ((c=errorStream.read())!=-1)
 102                                 System.err.print((char)c);
 103                         throw new Exception("git log failed");
 104                 }
 105                 inputStream.close();
 106                 errorStream.close();
 107                 long stop = System.currentTimeMillis();
 108                 return stop - start;
 109         }
 110 }