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Package laravel-visual-diff
Short Description Create visual diffs in your application tests.
License MIT
Homepage https://github.com/beyondcode/laravel-visual-diff
Informations about the package laravel-visual-diff
Laravel Visual Diff
This package can create a visual diff of two screenshots of your Laravel application. It works for both - regular HTTP tests, as well as tests using Laravel Dusk. Behind the scenes, it uses Pixelmatch to diff the two images.
Here are two basic examples of how the package works:
Using Laravel Dusk:
Using Laravel HTTP Testing:
Requirements
This package requires node 7.6.0 or higher and the Pixelmatch Node library.
You can install the Pixelmatch on MacOS via NPM:
Or you could install it globally
Custom node and npm binaries
Depending on your setup, node or npm might be not directly available to VisualDiff.
If you need to manually set these binary paths, you can do this by setting the npm_binary
and node_binary
config settings in the visualdiff.php
configuration file.
Installation
This package can be installed through Composer.
Usage
The package will automatically register the VisualDiffServiceProvider
with your Laravel application.
The package adds a new method to either the TestResponse
or the Browser
class which is called visualDiff
.
Depending on how you want to create visual diffs, follow the usage guidelines for the Laravel Dusk integration or the HTTP testing integration.
The visualDiff
method accepts a name, that will be used for the screenshot generation. If you do not provide a name, the package will try and guess the test name. If this does not work for you, please provide a name manually instead.
Dusk Integration
Just call the visualDiff()
method on the Laravel Dusk Browser
instance that you use for testing:
This will automatically create a screenshot in all provided resolutions and create a diff, if a previous screenshot is available.
HTTP Testing Integration
Just call the visualDiff()
method on the TestResponse
instance that you use for testing:
This will automatically create a screenshot in all provided resolutions and create a diff, if a previous screenshot is available.
Dealing with diffs
When VisualDiff detects differences in the new screenshot compared to the previous successfully created screenshot, the PHPUnit test will fail. It will tell you which test caused the visual difference as well as giving you the filename of the screenshot diff.
Now you need to handle with this visual diff, just as you would with a code-diff. Review the changes and either approve the visual difference, or revert the UI state back to the successful state.
You can approve the new screenshots by adding a -d --update-screenshots
flag to the phpunit command.
Specify multiple resolutions
Creating diffs for multiple resolutions can be very useful - especially if you want to test responsive websites and applications.
You can define all possible resolutions in your visualdiff.php
configuration file:
Alternatively, you may want to only create one specific diff in multiple resolutions.
You can do this using the visualDiffForResolutions
method and provide an array with the resolutions to test.
See diff results in your terminal window
If you use iTerm2 as your terminal of choice, you will see an image representation of the diff when you run your tests.
Changelog
Please see CHANGELOG for more information on what has changed recently.
Contributing
Please see CONTRIBUTING for details.
Security
If you discover any security related issues, please email [email protected] instead of using the issue tracker.
Credits
- Marcel Pociot
- All Contributors
License
The MIT License (MIT). Please see License File for more information.
All versions of laravel-visual-diff with dependencies
illuminate/support Version 5.4.*|5.5.*|5.6.*|5.7.*|5.8.*
symfony/process Version ^3.0|^4.0
spatie/browsershot Version ^3.22