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+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>33.5. Test Coverage Examination</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="prev" href="regress-tap.html" title="33.4. TAP Tests" /><link rel="next" href="client-interfaces.html" title="Part IV. Client Interfaces" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">33.5. Test Coverage Examination</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="regress-tap.html" title="33.4. TAP Tests">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="regress.html" title="Chapter 33. Regression Tests">Up</a></td><th width="60%" align="center">Chapter 33. Regression Tests</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 16.2 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="client-interfaces.html" title="Part IV. Client Interfaces">Next</a></td></tr></table><hr /></div><div class="sect1" id="REGRESS-COVERAGE"><div class="titlepage"><div><div><h2 class="title" style="clear: both">33.5. Test Coverage Examination <a href="#REGRESS-COVERAGE" class="id_link">#</a></h2></div></div></div><div class="toc"><dl class="toc"><dt><span class="sect2"><a href="regress-coverage.html#REGRESS-COVERAGE-CONFIGURE">33.5.1. Coverage with Autoconf and Make</a></span></dt><dt><span class="sect2"><a href="regress-coverage.html#REGRESS-COVERAGE-MESON">33.5.2. Coverage with Meson</a></span></dt></dl></div><p>
+    The PostgreSQL source code can be compiled with coverage testing
+    instrumentation, so that it becomes possible to examine which
+    parts of the code are covered by the regression tests or any other
+    test suite that is run with the code.  This is currently supported
+    when compiling with GCC, and it requires the <code class="literal">gcov</code>
+    and <code class="literal">lcov</code> packages.
+   </p><div class="sect2" id="REGRESS-COVERAGE-CONFIGURE"><div class="titlepage"><div><div><h3 class="title">33.5.1. Coverage with Autoconf and Make <a href="#REGRESS-COVERAGE-CONFIGURE" class="id_link">#</a></h3></div></div></div><p>
+     A typical workflow looks like this:
+</p><pre class="screen">
+./configure --enable-coverage ... OTHER OPTIONS ...
+make
+make check # or other test suite
+make coverage-html
+</pre><p>
+     Then point your HTML browser
+     to <code class="filename">coverage/index.html</code>.
+    </p><p>
+     If you don't have <code class="command">lcov</code> or prefer text output over an
+     HTML report, you can run
+</p><pre class="screen">
+make coverage
+</pre><p>
+     instead of <code class="literal">make coverage-html</code>, which will
+     produce <code class="filename">.gcov</code> output files for each source file
+     relevant to the test.  (<code class="literal">make coverage</code> and <code class="literal">make
+     coverage-html</code> will overwrite each other's files, so mixing them
+     might be confusing.)
+    </p><p>
+     You can run several different tests before making the coverage report;
+     the execution counts will accumulate.  If you want
+     to reset the execution counts between test runs, run:
+</p><pre class="screen">
+make coverage-clean
+</pre><p>
+    </p><p>
+     You can run the <code class="literal">make coverage-html</code> or <code class="literal">make
+     coverage</code> command in a subdirectory if you want a coverage
+     report for only a portion of the code tree.
+    </p><p>
+     Use <code class="literal">make distclean</code> to clean up when done.
+    </p></div><div class="sect2" id="REGRESS-COVERAGE-MESON"><div class="titlepage"><div><div><h3 class="title">33.5.2. Coverage with Meson <a href="#REGRESS-COVERAGE-MESON" class="id_link">#</a></h3></div></div></div><p>
+     A typical workflow looks like this:
+</p><pre class="screen">
+meson setup -Db_coverage=true ... OTHER OPTIONS ... builddir/
+meson compile -C builddir/
+meson test -C builddir/
+cd builddir/
+ninja coverage-html
+</pre><p>
+     Then point your HTML browser
+     to <code class="filename">./meson-logs/coveragereport/index.html</code>.
+    </p><p>
+     You can run several different tests before making the coverage report;
+     the execution counts will accumulate.
+    </p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="regress-tap.html" title="33.4. TAP Tests">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="regress.html" title="Chapter 33. Regression Tests">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="client-interfaces.html" title="Part IV. Client Interfaces">Next</a></td></tr><tr><td width="40%" align="left" valign="top">33.4. TAP Tests </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 16.2 Documentation">Home</a></td><td width="40%" align="right" valign="top"> Part IV. Client Interfaces</td></tr></table></div></body></html>
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