Symfony Finder Factory

A factory for Symfony Finder (symfony/finder) Finder instances.

The idea being able to inject a factory to create Finder instances into services rather than calling new Finder in each service.

Requirements

• PHP 5.3+
• Symfony Finder ~2.0

Installation

Through Composer as dflydev/symfony-finder-factory

Usage

<?php
namespace My;

use Dflydev\Symfony\FinderFactory;
use Dflydev\Symfony\FinderFactoryInterface;

class Service
{
    public function __construct(FinderFactoryInterface $finderFactory = null)
    {
        $this->finderFactory = $finderFactory ?: new FinderFactory;
    }

    public function doThingsWithTempFiles()
    {
        $finder = $this->finderFactory->create();

        $finder->in(sys_get_temp_dir());
        
        // do stuff with temp files
    }
}

Use Case

Mocking Finder has proven to be extremely difficult if new Finder is called inside of a class. By injecting a mocked Finder Factory we can have the opportunity to get mocked Finder instances inside our classes for the purpose of testing.

This is best shown by example:

<?php
namespace My;

use Dflydev\Symfony\FinderFactory;
use Dflydev\Symfony\FinderFactoryInterface;
use Symfony\Component\Finder\Finder;

class Service
{
    public function __construct(FinderFactoryInterface $finderFactory = null)
    {
        $this->finderFactory = $finderFactory ?: new FinderFactory;
    }

    public function findTmpFilesNew()
    {
        // Potential for mocked injected Finder Factory to return
        // a mocked Finder instance.
        $finder = $this->finderFactory->create();

        return $finder->in(sys_get_temp_dir());
    }

    public function findTmpFilesOld()
    {
        // Difficult to Mock
        $finder = new Finder;

        return $finder->in(sys_get_temp_dir());
    }
}

License

MIT, see LICENSE.

Community

If you have questions or want to help out, join us in the #dflydev channel on irc.freenode.net.

Not Invented Here

This project is based on work previously submitted to Symfony core (symfony/symfony#5650) but rejected.