Example of existing syntax

existing.php

<?php

class StringCalculator extends \PHPSpec\Context
{    
    function before()
    {
        $this->calculator = $this->spec(new StringCalculator);
    }    

    function itReturnsZeroWithNoArguments()
    {
        $this->calculator->add()->should->equal(0);
    }
    
    function itReturnsZeroWhenZeroIsPassed()
    {
        $this->calculator->add("0")->should->equal(0);
    }
        
    function itReturnsTheBareNumber()
    {
        $this->calculator->add("42")->should->equal(42);
    }
    
    function itReturnsTheSumOfSpaceSeparatedNumbers()
    {
        $this->calculator->add("42 7")->should->equal(49);
    }

    function itReturnsTheSumOfAnyWhiteSpaceSeparatedNumbers()
    {
        $this->pending()
    }

    function itAllowsYouToSpecifyAnySeparator()
    {
        $this->pending();
    }
}