lfs-book-zh_CN/chapter04/abouttestsuites.xml

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<sect1 id="prepare-abouttestsuites">
<title>About the Test Suites</title>
<?dbhtml filename="abouttestsuites.html"?>

<para>Most packages provide a test suite. Running the test suite for a
newly built package is a good idea because it can provide a <quote>sanity
check</quote> indicating that everything compiled correctly. A test suite
that passes its set of checks usually proves that the package is
functioning as the developer intended. It does not, however, guarantee
that the package is totally bug free.</para>

<para>Some test suites are more important than others. For example,
the test suites for the core toolchain packages&mdash;GCC, Binutils, and
Glibc&mdash;are of the utmost importance due to their central role in a
properly functioning system. The test suites for GCC and Glibc can
take a very long time to complete, especially on slower hardware, but
are strongly recommended.</para>

<note><para>Experience has shown that there is little to be gained
from running the test suites in <xref
linkend="chapter-temporary-tools"/>. There can be no escaping the fact
that the host system always exerts some influence on the tests in that
chapter, often causing inexplicable failures. Because the tools built
in <xref linkend="chapter-temporary-tools"/> are temporary and
eventually discarded, we do not recommend running the test suites in
<xref linkend="chapter-temporary-tools"/> for the average reader. The
instructions for running those test suites are provided for the
benefit of testers and developers, but they are strictly
optional.</para></note>

<para>A common issue with running the test suites for Binutils and GCC
is running out of pseudo terminals (PTYs). This can result in a high
number of failing tests. This may happen for several reasons, but the
most likely cause is that the host system does not have the
<systemitem class="filesystem">devpts</systemitem> file system set up 
correctly. This issue is discussed in greater detail in <xref
linkend="chapter-temporary-tools"/>.</para>

<para>Sometimes package test suites will fail, but for reasons which the
developers are aware of and have deemed non-critical. Consult the logs located
at <ulink url="&test-results;"/> to verify whether or not these failures are
expected. This site is valid for all tests throughout this book.</para>

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