[ClockMock article on Medium] Codebase

Entity.php

<?php
declare(strict_types=1);

namespace App\Entity;

use DateTimeImmutable;

class Entity
{
    private DateTimeImmutable $creationDate;
    
    private ?DateTimeImmutable $processingDate = null;

    public function __construct()
    {
        $this->creationDate = new DateTimeImmutable(); 
    }

    public function getCreationDate(): DateTimeImmutable
    {
        return $this->creationDate; 
    }
    
    public function getProcessingDate(): ?DateTimeImmutable
    {
        return $this->processingDate;
    }
    
    public function scheduleNextProcessing(DateTimeImmutable $processingDate): void
    {
        $this->processingDate = $processingDate;
    }
}

Service.php

<?php
declare(strict_types=1);

namespace App\Service;

use DateTimeImmutable;
use Exception;
use App\Entity\Entity;

class Service
{
    public function doSomething(): void
    {
        $now = new DateTimeImmutable();
        if ((int) $now->format('d') > 28) {
            throw new Exception('This thing cannot be done after the 28th of every month.');   
        }
        
        // ... Something is done here
    }
    
    public function scheduleProcessing(Entity $entity): void
    {   
        $entity->scheduleNextProcessing(new DateTimeImmutable('+5 minutes'));
    }
}