000

<?php declare(strict_types=1);

/*
 * This file is part of PHPUnit.
 *
 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
use PHPUnit\Framework\TestCase;

/**
 * @runClassInSeparateProcess
 */
final class SeparateClassRunMethodInNewProcessTest extends TestCase
{
    public const PROCESS_ID_FILE_PATH      = __DIR__ . '/parent_process_id.txt';
    public const INITIAL_PARENT_PROCESS_ID = 0;
    public const INITIAL_PROCESS_ID        = 1;

public static $parentProcessId = self::INITIAL_PARENT_PROCESS_ID;

public static $processId = self::INITIAL_PROCESS_ID;

public static function setUpBeforeClass(): void
    {
        if (\file_exists(self::PROCESS_ID_FILE_PATH)) {
            self::$parentProcessId = (int) \file_get_contents(self::PROCESS_ID_FILE_PATH);
        }
    }

public static function tearDownAfterClass(): void
    {
        if (\file_exists(self::PROCESS_ID_FILE_PATH)) {
            \unlink(self::PROCESS_ID_FILE_PATH);
        }
    }

public function testTestMethodIsRunInSeparateProcess(): void
    {
        self::$processId = \getmypid();

$this->assertNotSame(self::INITIAL_PROCESS_ID, self::$processId);
        $this->assertNotSame(self::INITIAL_PARENT_PROCESS_ID, self::$parentProcessId);
        $this->assertNotSame(self::$processId, self::$parentProcessId);
    }
}