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<chapter id="regress">

<title id="regress-title">Regression Tests</title>

<para>

There is at least one case in the <literal>random</literal> test

script that is intended to produce random results. This causes

random to fail the regression test once in a while (perhaps once

in every five to ten trials). Typing

random to fail the regression test occasionally. Typing

<programlisting>

diff results/random.out expected/random.out

</programlisting>

should produce only one or a few lines of differences. You need

not worry unless the random test always fails in repeated

attempts. (On the other hand, if the random test is

<emphasis>never</emphasis> reported to fail even in many trials

of the regression tests, you probably <emphasis>should</emphasis>

worry.)

attempts.

</para>

</sect2>

</sect1>