purpose
The simple factory pattern is a simplified version of the factory pattern.
The biggest difference between it and the static factory model is that it is not "static". Because it is not static, you can have multiple factories with different parameters, and you can create subclasses for them. It can even be mocked, which is essential for writing testable code. This is why it is more popular than the static factory model!
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Code
- SimpleFactory.php
<?php namespace DesignPatterns\Creational\SimpleFactory; class SimpleFactory { public function createBicycle(): Bicycle { return new Bicycle(); } }
- Bicycle.php
<?php
namespace DesignPatterns\Creational\SimpleFactory;
class Bicycle
{
public function driveTo(string $destination)
{
return $destination;
}
}usage
$factory = new SimpleFactory();
$bicycle = $factory->createBicycle();
$bicycle->driveTo('Paris');test
- 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);
}
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