Przykładowa specyfikacja do opisania zachowania Named Constructors wykorzystując PHPSpec

Person.php

<?php

class Person
{
    private $name;
    private $surname;

    private function __construct($name, $surname)
    {
        $this->name = $name;
        $this->surname = $surname;
    }

    public static function born($name, $surname)
    {
        $person = new Person($name, $surname);

        // TODO: write other logic here

        return $person;
    }

    public static function bornAsCloneOf(Person $original)
    {
        $name = $original->getName();
        $surname = $original->getSurname();
        $person = new Person($name, $surname);

        // TODO: write other logic here

        return $person;
    }

    /**
     * @return mixed
     */
    public function getName()
    {
        return $this->name;
    }

    /**
     * @return mixed
     */
    public function getSurname()
    {
        return $this->surname;
    }

    public function changeName($newName)
    {
        $this->name = $newName;
    }
}

PersonSpec.php

<?php

namespace spec;

use Person;
use PhpSpec\ObjectBehavior;
use Prophecy\Argument;

/**
 * Class PersonSpec
 * @package spec
 * @mixin Person
 */
class PersonSpec extends ObjectBehavior
{
    function let()
    {
        $name = 'asia';
        $surname = 'asiowa';

        $this->beConstructedThroughBorn($name, $surname);
    }

    function its_person()
    {
        $this->shouldHaveType(Person::class);
    }

    function it_create_person_clone(Person $original)
    {
        $original->getName()->willReturn('Jola');
        $original->getSurname()->willReturn('Jolanta');

        $this->beConstructedThroughBornAsCloneOf($original);
        $this->getName()->shouldBe('Jola');
        $this->getSurname()->shouldBe('Jolanta');
    }

    function it_allow_to_change_person_name()
    {
        $this->changeName('miriam');
        $this->getName()->shouldBe('miriam');
    }
}