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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>32.5. 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 V1.79.1" /><link rel="prev" href="regress-tap.html" title="32.4. TAP Tests" /><link rel="next" href="client-interfaces.html" title="Part IV. Client Interfaces" /></head><body id="docContent" class="container-fluid col-10"><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">32.5. Test Coverage Examination</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="regress-tap.html" title="32.4. TAP Tests">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="regress.html" title="Chapter 32. Regression Tests">Up</a></td><th width="60%" align="center">Chapter 32. Regression Tests</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 13.4 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></hr></div><div class="sect1" id="REGRESS-COVERAGE"><div class="titlepage"><div><div><h2 class="title" style="clear: both">32.5. Test Coverage Examination</h2></div></div></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 requires the <code class="command">gcov</code>
and <code class="command">lcov</code> programs.
</p><p>
A typical workflow would look 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>.
The <code class="command">make</code> commands also work in subdirectories.
</p><p>
If you don't have <code class="command">lcov</code> or prefer text output over an
HTML report, you can also 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>
To reset the execution counts between test runs, run:
</p><pre class="screen">
make coverage-clean
</pre><p>
</p></div><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navfooter"><hr></hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="regress-tap.html" title="32.4. TAP Tests">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="regress.html" title="Chapter 32. 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">32.4. TAP Tests </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 13.4 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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