<?php

namespace Toalett\Multiprocessing\Tests\ProcessControl;

use PHPUnit\Framework\TestCase;
use Toalett\Multiprocessing\ProcessControl\Fork;

class ForkTest extends TestCase
{
	/**
	 * @param int $pid
	 * @dataProvider positiveIntegerProvider
	 */
	public function testItSaysItIsAParentProcessWhenAPositivePidIsProvided(int $pid): void
	{
		$fork = new Fork($pid);
		self::assertTrue($fork->isParent());
		self::assertFalse($fork->isChild());
		self::assertFalse($fork->failed());
	}

	/**
	 * @param int $pid
	 * @dataProvider negativeIntegerProvider
	 */
	public function testItSaysItFailedWhenANegativePidIsProvided(int $pid): void
	{
		$fork = new Fork($pid);
		self::assertTrue($fork->isParent());
		self::assertFalse($fork->isChild());
		self::assertTrue($fork->failed());
	}

	public function testItSaysItIsAChildProcessWhenPidZeroIsProvided(): void
	{
		$fork = new Fork(0);
		self::assertFalse($fork->isParent());
		self::assertTrue($fork->isChild());
		self::assertFalse($fork->failed());
	}

	public function positiveIntegerProvider(): array
	{
		return [
			[1],
			[10],
			[1000],
			[PHP_INT_MAX],
		];
	}

	public function negativeIntegerProvider(): array
	{
		return [
			[-1],
			[-10],
			[-1000],
			[PHP_INT_MIN],
		];
	}
}