// Install PHPUnit.
$ wget https://phar.phpunit.de/phpunit.phar
$ chmod +x phpunit.phar
$ sudo mv phpunit.phar /usr/local/bin/phpunit
$ phpunit -v

// Clone source code.
$ git clone https://github.com/imajinyun/php-design-pattern.git
$ cd ./php-design-pattern
$ composer install && ./phpunit -vvv