Recently davertMik had announced an addition to Codeception framework that allows BDD style unit test. Pretty nice like this

        $this->specify('post can be published', function() {
            $this->post->setTitle('Testing is Fun!');
            $this->post->setBody('Thats for sure');
            expect_that($this->post->publish());
        });

Two new additional libraries introduced for this Specify and Verify

If you don't like running codeception via php codecept.phar ... you could install it in system bin dir

sudo wget http://codeception.com/codecept.phar -O /usr/local/bin/codecept
sudo chmod +x /usr/local/bin/codecept

and now run it like this to check

codecept -V