<?php

declare(strict_types=1);

namespace Blax\ReactPhpKernel\Tests;

use Blax\ReactPhpKernel\Process\ChildReaper;
use PHPUnit\Framework\TestCase;
use React\EventLoop\StreamSelectLoop;

final class ChildReaperTest extends TestCase
{
    public function test_reap_all_returns_zero_when_there_are_no_children(): void
    {
        if (! function_exists('pcntl_waitpid')) {
            $this->markTestSkipped('ext-pcntl not available');
        }

        $reaper = new ChildReaper(new StreamSelectLoop);

        $this->assertSame(0, $reaper->reapAll());
    }

    public function test_install_and_uninstall_do_not_throw(): void
    {
        $loop = new StreamSelectLoop;
        $reaper = new ChildReaper($loop);

        $reaper->install(0.1);
        $reaper->uninstall();

        // Reaching here without an exception is the assertion.
        $this->assertTrue(true);
    }

    public function test_reap_all_is_safe_to_call_repeatedly(): void
    {
        if (! function_exists('pcntl_waitpid')) {
            $this->markTestSkipped('ext-pcntl not available');
        }

        $reaper = new ChildReaper(new StreamSelectLoop);

        $this->assertSame(0, $reaper->reapAll());
        $this->assertSame(0, $reaper->reapAll());
    }
}