Purpose:
It differs from the static factory because it is not static. Therefore, you can have multiple factories, differently parameterized, you can subclass it and you can mock it. It always should be preferred over a static factory!
SimpleFactory.php
<?php
namespace DesignPatterns\Creational\SimpleFactory;
class SimpleFactory
{
public function createBicycle(): Bicycle
{
return new Bicycle();
}
}
Bicycle.php
<?php
namespace DesignPattern\Creational\SimpleFactory;
class Bicycle
{
public function driveTo($destination)
{
}
}
Tests/SimpleFactoryTest.php
<?php
namespace DesignPatterns\Creational\SimpleFactory\Tests;
use DesignPatterns\Creational\SimpleFactory\Bicycle;
use DesignPatterns\Creational\SimpleFactory\SimpleFactory;
use PHPUnit\Framework\TestCase;
class SimpleFactoryTest extends TestCase
{
public function testCanCreateBicycle()
{
$bicycle = (new SimpleFactory())->createBicycle();
$this->assertInstanceOf(Bicycle::class, $bicycle);
}
}