Fatal Error: Require_Once(): Failed Opening Required 'phpunit/extensions/seleniumtestcase.php'

The question: Where is defined include_path?

I try to run PhpUnit tests. I cd to project folder and use command:

"phpunit/functional/SiteTest.php". The command line output:

"""

c:\xampp\htdocs\yii\projects\demo\protected\tests>phpunit functional/SiteTest.php

Warning: require_once(PHPUnit/Extensions/SeleniumTestCase.php): failed to open stream: No such file or directory in C:\xampp\htdocs\yii\framework\test\CWebTestCase.php on line 12

Fatal error: require_once(): Failed opening required ‘PHPUnit/Extensions/SeleniumTestCase.php’ (include_path=’.;C:\xampp\php\PEAR’) in C:\xampp\htdocs\yii\framework\test\CWebTestCase.php on line 12

"""

Where is defined include_path? I need to change include directory, in my case it is c:xampp\php, not c:\xampp\php\PEAR.

I have used and modified advices from:

http://www.yiiframework.com/forum/index.php/topic/16553-cant-get-phpunit-and-selenium-working-correctly/

http://www.yiiframework.com/forum/index.php?/topic/14995-wamp-netbeans-phpunit-selenium-yii/

I went to: http://pear.phpunit.de/

downloaded: PHPUnit_Selenium 1.3.3

unipped and untarred

have copied contents from inner folder ‘C:\Users\Gintare\Downloads\PHPUnit_Selenium-1.3.3\PHPUnit_Selenium-1.3.3\PHPUnit_Selenium-1.3.3\PHPUnit\Extensions\’

                to folder c:\xampp\php\PhpUnit\Extensions.

test is working "c:\xampp\htdocs\yii\projects\demo\protected\tests>phpunit functional/SiteTest.php"