Installing package by composer breaks Symfony4 unit testing

[clauculo]

When requiring spatie/phpunit-snapshot-assertions --dev package by composer the unit tests of Symfony breaks.

Output:

Fatal error: Declaration of Symfony\Bridge\PhpUnit\Legacy\SymfonyTestsListenerForV7::addError(PHPUnit\Framework\Test $test, Throwable $t, float $time): void must be compatible with PHPUnit\Framework\TestListener::addError(PHPUnit\Framework\Test $test, Exception $e, $time) in /var/www/html/vendor/symfony/phpunit-bridge/Legacy/SymfonyTestsListenerForV7.php on line 27

I've tried a couple of things

• Remove vendor dir and install everything again
• Remove vendor dir and run composer update
• Remove vendor dir and load older version (1.2.3)

I guess there is a conflict in the PHP-Unit Bridge and another package.

Our package list:

    "require": {
        "php": ">=7.1",
        "aws/aws-sdk-php": "^3.24",
        "doctrine/doctrine-bundle": "^1.6",
        "doctrine/doctrine-cache-bundle": "^1.2",
        "doctrine/orm": "^2.5",
        "firebase/php-jwt": "^5.0",
        "guzzlehttp/guzzle": "^6.3",
        "harmbandstra/swagger-ui-bundle": "^3.0",
        "knplabs/doctrine-behaviors": "~1.1",
        "league/fractal": "master@dev",
        "myclabs/php-enum": "^1.6",
        "nelmio/cors-bundle": "^1.5",
        "sensio/framework-extra-bundle": "^5.1",
        "stof/doctrine-extensions-bundle": "^1.3",
        "symfony/asset": "^4.0",
        "symfony/flex": "^1.0",
        "symfony/form": "^4.0",
        "symfony/monolog-bundle": "^3.1",
        "symfony/orm-pack": "^1.0",
        "symfony/polyfill-apcu": "^1.0",
        "symfony/security-bundle": "^4.0",
        "symfony/serializer-pack": "^1.0",
        "symfony/swiftmailer-bundle": "^3.1",
        "symfony/translation": "^4.0",
        "symfony/twig-bundle": "^4.0",
        "symfony/validator": "^4.0",
        "symfony/yaml": "^4.0",
        "white-october/pagerfanta-bundle": "^1.1"
    },
    "require-dev": {
        "doctrine/doctrine-fixtures-bundle": "^3.0",
        "spatie/phpunit-snapshot-assertions": "^1.2",
        "symfony/browser-kit": "^4.0",
        "symfony/dotenv": "^4.0",
        "symfony/phpunit-bridge": "^4.0",
        "symfony/profiler-pack": "^1.0"
    },

Ps. Good useful package! Thanks a lot for maintaining this. (In our old office it works perfect)

[sebastiandedeyne]

I suggest you open an issue in the Bridge package. While this package might trigger different version requirements, it's their responsibility to ensure they only allow specific versions.

[ebuildy]

Installing the package, I got warning:

 Adding phpunit/phpunit as a dependency is discouraged in favor of Symfony's PHPUnit Bridge.


  * Instead:
    1. Remove it now: composer remove --dev phpunit/phpunit
    2. Use Symfony's bridge: composer require --dev phpunit

Do you have an example of usage with Symfony 4 please?