Creates the application 1,000 times

ExampleTest.php

<?php

namespace Tests\Feature;

use Tests\TestCase;

class ExampleTest extends TestCase
{
    public function test_leaks_memory_on_1000_iterations()
    {
        // Remove the existing application instance.
        $this->app->flush();
        $this->app = null;

        // Let's create a fully booted application instance 1,000 times.
        for($i = 1; $i < 1000; ++$i) {
            $this->createApplication()->flush();
            
            // Each 50 times, report the MB used by the PHP process by dumping it.
            if (! $i % 50) {
                dump('Using ' . ((int) (memory_get_usage(true) / (1024 * 1024))) . 'MB as ' . $i . ' iterations.');
            }
        }

        
        $this->app = $this->createApplication();
    }
}