example.php

<?php
 
class BaseAdder
{
    public function add($a, $b)
    {
        return $a + $b;
    }
}
 
class BaseAdderSpec extends \PhpSpec\ObjectBehavior
{
    function it_adds()
    {
        $this->add(1, 2)->shouldReturn(3);
    }
}
 
class LogAdder
{
    private $logger;
    private $adder;
 
    public function __construct(Logger $logger, BaseAdder $adder)
    {
        $this->logger = $logger;
        $this->adder = $adder;
    }
 
    public function add($a, $b)
    {
        $this->logger->log("adding $a and $b");
        $this->adder->add($a + $b);
    }
}
 
class LogAddedSpec extends \PhpSpec\ObjectBehavior
{
    function let(Logger $logger, BaseAdder $adder)
    {
        $this->beConstructedWith($logger, $adder);
    }
 
    function it_logs()
    {
        $this->logger->log("adding 1 and 2")->shouldBeCalled();
        $this->adder->add(1, 2)->shouldBeCalled();
 
        $this->add(1, 2);
    }
}