EU Cookie Consent

To use this Website we are using Cookies and collecting some Data. To be compliant with the EU GDPR we give you to choose if you allow us to use certain Cookies and to collect some Data.

Essential Data

The Essential Data is needed to run the Site you are visiting technically. You can not deactivate them.

Laravel

Under the hood: How fake uploaded files work in Laravel

Daniel Verner -

Introduction
This is the first post of the new “Under the hood” series where I’ll try to explain how things work behind the scenes. I am going to pick topics from my day to day work from various areas like Laravel, JavaScript, Vue.js, etc.

Testing file upload
It is quite common that a web application has file upload, so we want to cover this functionality with tests. Laravel offers a method to create a fake upload file using the following method: UploadedFile::fake()->image(‘avatar.jpg’); For more information about how to test file upload please check the Laravel documentation here.
Let’s see how the UploadedFile::fake() works. The fake method simply creates and returns a new instance of the Testing\FileFactory class:
public static function fake()
{
    return new Testing\FileFactory;
}

The FileFactory
The FileFactory has two public methods, we can create a generic file with a given name and file size, or we can create an image with a specific width and height.

Create
This method creates a temporary file with the PHP's built-in tmpfile() function. This resource is used to instantiate a new Testing\File, set the name of the file, and the desired file size.
public function create($name, $kilobytes = 0)
{
    return tap(new File($name, tmpfile()), function ($file) use ($kilobytes) {
        $file->sizeToReport = $kilobytes * 1024;
    });
}
This newly created File is going to be used when you make a post request from the test case, like this:
$response = $this->json('POST', '/avatar', [
            'avatar' => $file,
        ]);

Image
The basic principle of the image method is similar to the creation, but it actually creates a black image with the given dimensions:

The image is being generated in the generateImage method. As of the time of writing the image generation support png and jpeg images. It also creates a temporary file, generates the image according to the $type argument, and writes the content to the temporary file.
protected function generateImage($width, $height, $type)
{
    return tap(tmpfile(), function ($temp) use ($width, $height, $type) {
        ob_start();
 
        $image = imagecreatetruecolor($width, $height);
 
        switch ($type) {
            case 'jpeg':
                imagejpeg($image);
                break;
            case 'png':
                imagepng($image);
                break;
        }
 
        fwrite($temp, ob_get_clean());
    });
}
Using the fake uploaded file makes it is easy to test the file and image uploads. I hope this article was useful to understand how it works.

Related articles
If you like this article, please check the other posts of the series here.

Tags: Laravel · how it works · under the hood

Want products news and updates?

Sign up for our newsletter to stay up to date.

We care about the protection of your data. Read our Privacy Policy.

Impressions from our Team

  • Happy Birthday Ognjen! And marry Christmas to all other 🎄#notacakeshop - #

  • #Office #Garden - #

  • #workhard - #

  • #belgrade #skyline - #

  • #happybirthday Phil :) - #

  • #happybirthday Stefan 🥂 - #

  • #happybirthday Lidija 🍾 - #

  • Say hi 👋 to our newest team member ☕️ - #

  • #bithday #cake 😻 - #

  • #stayathome #homeoffice #42coders - #

  • #stayathome #homeoffice #42coders #starwars :) - #

  • #stayathome #homeoffice #42coders - #

  • We had a really nice time with #laracononline #laravel - #

  • Happy Birthday 🎂 Miloš - #

  • Happy Birthday 🎂Nikola - #

  • #42coders #christmas #dinner what a nice evening :) - #

  • Happy Birthday 🎂 Ognjen - #

  • Wish you all a merry Christmas 🎄🎁 - #

  • #happybirthday Luka! - #

  • https://communian.com Triff dich mit Menschen aus deiner Umgebung die deine Interessen teilen :) Wir sind gerade live gegangen und freuen uns über jede neue Community die zu uns kommt ❤️ - #

© 2021 42coders All rights reserved.