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>Chapter 29. Regression Tests</TD
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><H1
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><A
NAME="REGRESS-RUN"
>29.1. Running the Tests</A
></H1
><P
> The regression tests can be run against an already installed and
running server, or using a temporary installation within the build
tree. Furthermore, there is a <SPAN
CLASS="QUOTE"
>"parallel"</SPAN
> and a
<SPAN
CLASS="QUOTE"
>"sequential"</SPAN
> mode for running the tests. The
sequential method runs each test script in turn, whereas the
parallel method starts up multiple server processes to run groups
of tests in parallel. Parallel testing gives confidence that
interprocess communication and locking are working correctly. For
historical reasons, the sequential test is usually run against an
existing installation and the parallel method against a temporary
installation, but there are no technical reasons for this.
</P
><P
> To run the regression tests after building but before installation,
type:
</P><PRE
CLASS="SCREEN"
>gmake check</PRE
><P>
in the top-level directory. (Or you can change to
<TT
CLASS="FILENAME"
>src/test/regress</TT
> and run the command there.)
This will first build several auxiliary files, such as
some sample user-defined trigger functions, and then run the test driver
script. At the end you should see something like:
</P><PRE
CLASS="SCREEN"
><SAMP
CLASS="COMPUTEROUTPUT"
>=======================
All 115 tests passed.
=======================</SAMP
></PRE
><P>
or otherwise a note about which tests failed. See <A
HREF="regress-evaluation.html"
>Section 29.2</A
> below before assuming that a
<SPAN
CLASS="QUOTE"
>"failure"</SPAN
> represents a serious problem.
</P
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><P
> This test method starts a temporary server, which is configured to accept
any connection originating on the local machine. Any local user can gain
database superuser privileges when connecting to this server, and could
in principle exploit all privileges of the operating-system user running
the tests. Therefore, it is not recommended that you use <TT
CLASS="LITERAL"
>gmake
check</TT
> on machines shared with untrusted users. Instead, run the tests
after completing the installation, as described in the next section.
</P
><P
> On Unix-like machines, this danger can be avoided if the temporary
server's socket file is made inaccessible to other users, for example
by running the tests in a protected chroot. On Windows, the temporary
server opens a locally-accessible TCP socket, so filesystem protections
cannot help.
</P
></TD
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><P
> Because this test method runs a temporary server, it will not work
if you did the build as the root user, since the server will not start as
root. Recommended procedure is not to do the build as root, or else to
perform testing after completing the installation.
</P
><P
> If you have configured <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> to install
into a location where an older <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
>
installation already exists, and you perform <TT
CLASS="LITERAL"
>gmake check</TT
>
before installing the new version, you might find that the tests fail
because the new programs try to use the already-installed shared
libraries. (Typical symptoms are complaints about undefined symbols.)
If you wish to run the tests before overwriting the old installation,
you'll need to build with <TT
CLASS="LITERAL"
>configure --disable-rpath</TT
>.
It is not recommended that you use this option for the final installation,
however.
</P
><P
> The parallel regression test starts quite a few processes under your
user ID. Presently, the maximum concurrency is twenty parallel test
scripts, which means forty processes: there's a server process and a
<SPAN
CLASS="APPLICATION"
>psql</SPAN
> process for each test script.
So if your system enforces a per-user limit on the number of processes,
make sure this limit is at least fifty or so, else you might get
random-seeming failures in the parallel test. If you are not in
a position to raise the limit, you can cut down the degree of parallelism
by setting the <TT
CLASS="LITERAL"
>MAX_CONNECTIONS</TT
> parameter. For example:
</P><PRE
CLASS="SCREEN"
>gmake MAX_CONNECTIONS=10 check</PRE
><P>
runs no more than ten tests concurrently.
</P
><P
> To run the tests after installation (see <A
HREF="installation.html"
>Chapter 15</A
>),
initialize a data area and start the
server, as explained in <A
HREF="runtime.html"
>Chapter 17</A
>, then type:
</P><PRE
CLASS="SCREEN"
>gmake installcheck</PRE
><P>
or for a parallel test:
</P><PRE
CLASS="SCREEN"
>gmake installcheck-parallel</PRE
><P>
The tests will expect to contact the server at the local host and the
default port number, unless directed otherwise by <TT
CLASS="ENVAR"
>PGHOST</TT
> and
<TT
CLASS="ENVAR"
>PGPORT</TT
> environment variables.
</P
><P
> The source distribution also contains regression tests for the optional
procedural languages and for some of the <TT
CLASS="FILENAME"
>contrib</TT
> modules.
At present, these tests can be used only against an already-installed
server. To run the tests for all procedural languages that have been
built and installed, change to the <TT
CLASS="FILENAME"
>src/pl</TT
> directory of the
build tree and type:
</P><PRE
CLASS="SCREEN"
>gmake installcheck</PRE
><P>
You can also do this in any of the subdirectories of <TT
CLASS="FILENAME"
>src/pl</TT
>
to run tests for just one procedural language. To run the tests for all
<TT
CLASS="FILENAME"
>contrib</TT
> modules that have them, change to the
<TT
CLASS="FILENAME"
>contrib</TT
> directory of the build tree and type:
</P><PRE
CLASS="SCREEN"
>gmake installcheck</PRE
><P>
The <TT
CLASS="FILENAME"
>contrib</TT
> modules must have been built and installed first.
You can also do this in a subdirectory of <TT
CLASS="FILENAME"
>contrib</TT
> to run
the tests for just one module.
</P
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