PHPUnit (How-To Tutorial)

Here is the list of some PHPUnit How-To Begineer tutorial

http://www.sitepoint.com/getting-started-with-phpunit/
http://codesamplez.com/development/phpunit-tutorial-beginners
http://www.sitepoint.com/tutorial-introduction-to-unit-testing-in-php-with-phpunit/


For Reference(Becoming expert please refer)
https://phpunit.de/manual/current/en/phpunit-book.pdf