Trait to support retry annotations on PHPUnit tests, inspired by https://blog.forma-pro.com/retry-an-erratic-test-fc4d928c57fb

Retry.php

<?php

namespace Tests\Traits;

use PHPUnit\Util\Test as TestUtil;
use Throwable;

trait Retry
{
    /**
     * @throws Throwable
     */
    public function runBare(): void
    {
        $numberOfRetires = $this->getNumberOfRetries();

        for ($i = 0; $i <= $numberOfRetires; ++$i) {
            try {
                parent::runBare();
            } catch (Throwable $e) {
                throw $e;
            }
        }
    }

    /**
     * @return int
     */
    protected function getNumberOfRetries()
    {
        $annotations = TestUtil::parseTestMethodAnnotations(static::class, $this->getName(false));

        return isset($annotations['method']['retry'][0]) ? abs((int) $annotations['method']['retry'][0]) : 0;
    }
}