Sample Customer Service Unit Test with DI Container

CustomerServiceTestIncorrect.php

<?php
namespace Assoa\Tests\Unit;

use PHPUnit\Framework\TestCase;
use Kanian\ContainerX\ContainerX;
use Assoa\DomainServices\Services\CustomerService;
use Assoa\Persistence\Repositories\Interfaces\CustomerRepositoryInterface;

class CustomerServiceTest extends TestCase
{
    private $customerRepository;
  
    public function __construct(){
        $this->c = new ContainerX;
        parent::__construct();
    }

    protected function setUp()
    {
        //some setup here
        $this->c[CustomerRepositoryInterface::class] = $this->prophecy(CustomerRepositoryInterface::class);
        $this->c['CustomerService'] = function ($c) {
            return new CustomerService($c[CustomerRepositoryInterface::class]->reveal());
        };
        $this->customer = $this->objectMother->getUnSavedCustomer();
        $this->savedCustomer = $this->objectMother->getCustomer();
    }

    public function testAddCustomerAdds()
    {
        $this->c[CustomerRepositoryInterface::class]->save($this->customer)->shouldBeCalled()
            ->willReturn($this->savedCustomer->getId());
        $saved = $this->c['CustomerService']->create($this->customer->getName(), $this->customer->getEmail(), $this->customer->getPassword());
        $this->assertEquals($this->savedCustomer, $saved);
    }
    //...

}