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/**

@page qa Kea Quality Assurance processes

 @section qaUnitTests Unit-tests

Kea uses the Google C++ Testing Framework (also called googletest or gtest) as a
base for our C++ unit-tests. See http://code.google.com/p/googletest/ for
details. We used to have Python unit-tests that were inherited from BIND10
days. Those tests are removed now, so please do not develop any new Python
tests in Kea. If you want to write DHCP tests in Python, we encourage you to
take a look at ISC Forge: http://kea.isc.org/wiki/IscForge. You must have \c
gtest installed or at least extracted in a directory before compiling Kea
unit-tests. To enable unit-tests in Kea, use:

@code
./configure --with-gtest=/path/to/your/gtest/dir
@endcode

or

@code
./configure --with-gtest-source=/path/to/your/gtest/dir
@endcode

Depending on how you compiled or installed \c gtest (e.g. from sources
or using some package management system) one of those two switches will
find \c gtest. After that you make run unit-tests:

@code
make check

@endcode

The following environment variable can affect unit-tests:

- KEA_LOCKFILE_DIR - Specifies a directory where the logging system should
  create its lock file. If not specified, it is prefix/var/run/kea, where prefix
  defaults to /usr/local. This variable must not end with a slash. There is one
  special value: "none", which instructs Kea to not create lock file at
  all. This may cause issues if several processes log to the same file.
  Also see Kea User's Guide, section 15.3.

- KEA_LOGGER_DESTINATION - Specifies logging destination. If not set, logged
  messages will not be recorded anywhere. There are 3 special values:
  stdout, stderr and syslog. Any other value is interpreted as a filename.
  Also see Kea User's Guide, section 15.3.

- KEA_PIDFILE_DIR - Specifies the directory which should be used for PID files
  as used by dhcp::Daemon or its derivatives. If not specified, the default is
  prefix/var/run/kea, where prefix defaults to /usr/local. This variable must
  not end with a slash.

- KEA_SOCKET_TEST_DIR - if set, it specifies the directory where Unix
  sockets are created. There's OS limitation on how long a Unix socket
  path can be. It is typcially slightly over 100 characters. If you
  happen to build and run unit-tests in deeply nested directories, this
  may become a problem. KEA_SOCKET_TEST_DIR can be specified to instruct
  unit-test to use a different directory. Must not end with slash (e.g.
  /tmp).

 */