~ubuntu-dev/mplayer/ubuntu-feisty

<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>B.2.�How to do regression testing using CVS</title><link rel="stylesheet" href="default.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.68.1"><link rel="start" href="index.html" title="MPlayer - The Movie Player"><link rel="up" href="bugreports.html" title="Appendix�B.�How to report bugs"><link rel="prev" href="bugreports_fix.html" title="B.1.�How to fix bugs"><link rel="next" href="bugreports_report.html" title="B.3.�How to report bugs"><link rel="preface" href="howtoread.html" title="How to read this documentation"><link rel="chapter" href="intro.html" title="Chapter�1.�Introduction"><link rel="chapter" href="install.html" title="Chapter�2.�Installation"><link rel="chapter" href="usage.html" title="Chapter�3.�Usage"><link rel="chapter" href="cd-dvd.html" title="Chapter�4.�CD/DVD usage"><link rel="chapter" href="faq.html" title="Chapter�5.�Frequently Asked Questions"><link rel="chapter" href="containers.html" title="Chapter�6.�Containers"><link rel="chapter" href="codecs.html" title="Chapter�7.�Codecs"><link rel="chapter" href="video.html" title="Chapter�8.�Video output devices"><link rel="chapter" href="audio.html" title="Chapter�9.�Audio output devices"><link rel="chapter" href="tv.html" title="Chapter�10.�TV"><link rel="chapter" href="ports.html" title="Chapter�11.�Ports"><link rel="chapter" href="mencoder.html" title="Chapter�12.�Basic usage of MEncoder"><link rel="chapter" href="encoding-guide.html" title="Chapter�13.�Encoding with MEncoder"><link rel="appendix" href="mailinglists.html" title="Appendix�A.�Mailing lists"><link rel="appendix" href="bugreports.html" title="Appendix�B.�How to report bugs"><link rel="appendix" href="bugs.html" title="Appendix�C.�Known bugs"><link rel="appendix" href="skin.html" title="Appendix�D.�MPlayer skin format"><link rel="appendix" href="users-vs-dev.html" title="Appendix�E.�Developer cries"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">B.2.�How to do regression testing using CVS</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="bugreports_fix.html">Prev</a>�</td><th width="60%" align="center">Appendix�B.�How to report bugs</th><td width="20%" align="right">�<a accesskey="n" href="bugreports_report.html">Next</a></td></tr></table><hr></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="bugreports_regression_test"></a>B.2.�How to do regression testing using CVS</h2></div></div></div><p>

<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>B.3.�How to do regression testing using Subversion</title><link rel="stylesheet" href="default.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.68.1"><link rel="start" href="index.html" title="MPlayer - The Movie Player"><link rel="up" href="bugreports.html" title="Appendix�B.�How to report bugs"><link rel="prev" href="bugreports_fix.html" title="B.2.�How to fix bugs"><link rel="next" href="bugreports_report.html" title="B.4.�How to report bugs"><link rel="preface" href="howtoread.html" title="How to read this documentation"><link rel="chapter" href="intro.html" title="Chapter�1.�Introduction"><link rel="chapter" href="install.html" title="Chapter�2.�Installation"><link rel="chapter" href="usage.html" title="Chapter�3.�Usage"><link rel="chapter" href="cd-dvd.html" title="Chapter�4.�CD/DVD usage"><link rel="chapter" href="faq.html" title="Chapter�5.�Frequently Asked Questions"><link rel="chapter" href="containers.html" title="Chapter�6.�Containers"><link rel="chapter" href="codecs.html" title="Chapter�7.�Codecs"><link rel="chapter" href="video.html" title="Chapter�8.�Video output devices"><link rel="chapter" href="audio.html" title="Chapter�9.�Audio output devices"><link rel="chapter" href="tv.html" title="Chapter�10.�TV"><link rel="chapter" href="ports.html" title="Chapter�11.�Ports"><link rel="chapter" href="mencoder.html" title="Chapter�12.�Basic usage of MEncoder"><link rel="chapter" href="encoding-guide.html" title="Chapter�13.�Encoding with MEncoder"><link rel="appendix" href="mailinglists.html" title="Appendix�A.�Mailing lists"><link rel="appendix" href="bugreports.html" title="Appendix�B.�How to report bugs"><link rel="appendix" href="bugs.html" title="Appendix�C.�Known bugs"><link rel="appendix" href="skin.html" title="Appendix�D.�MPlayer skin format"><link rel="appendix" href="users-vs-dev.html" title="Appendix�E.�Developer cries"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">B.3.�How to do regression testing using Subversion</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="bugreports_fix.html">Prev</a>�</td><th width="60%" align="center">Appendix�B.�How to report bugs</th><td width="20%" align="right">�<a accesskey="n" href="bugreports_report.html">Next</a></td></tr></table><hr></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="bugreports_regression_test"></a>B.3.�How to do regression testing using Subversion</h2></div></div></div><p>

A problem that can happen sometimes is 'it used to work before, now it

doesn't anymore...'.

Here is a step by step procedure to try to pinpoint when the problem

occurred. This is <span class="bold"><strong>not</strong></span> for casual users.

</p><p>

First, you'd need to fetch MPlayer's source tree from CVS.

First, you'd need to fetch MPlayer's source tree from Subversion.

Instructions can be found at the bottom of

<a href="http://www.mplayerhq.hu/homepage/dload.html" target="_top">this page</a>.

<a href="http://www.mplayerhq.hu/dload.html" target="_top">this page</a>.

</p><p>

You will have now in the main/ directory an image of the CVS tree, on the

You will have now in the mplayer/ directory an image of the Subversion tree, on the

client side.

Now update this image to the date you want:

</p><pre class="screen">

cd main/

cvs update -PAd -D "2004-08-23"

cd mplayer/

svn update -r {"2004-08-23"}

</pre><p>

The date format is YYYY-MM-DD HH:MM:SS.

Using this date format ensure that you will be able to extract patches

</p><p>

If any non-programmer reads this, the fastest method to get at the point

where the problem occurred is to use a binary search — that is,

search the date of the breackage by repeatedly dividing the search

search the date of the breakage by repeatedly dividing the search

interval in half.

For example, if the problem occurred in 2003, start at mid-year, then ask

"Is the problem already here?".

back to the present.)

</p><p>

When you have found the day where the problem happened, continue the search

using the mplayer-cvslog archive (sorted by date) and a more precise cvs

using the mplayer-cvslog archive (sorted by date) and a more precise svn

update including hour, minute and second:

</p><pre class="screen">

cvs update -PAd -D "2004-08-23 15:17:25"

svn update -r {"2004-08-23 15:17:25"}

</pre><p>

This will allow you to easily find the exact patch that did it.

</p><p>

There is a chance that the author will jump in to suggest a fix.

You may also look hard at the patch until it is coerced to reveal where

the bug is :-).

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