Chemaclass / stock-ticker

tests/StockTicker/Unit/WithFakeHttpClient.php

<?php

declare(strict_types=1);

namespace Chemaclass\StockTickerTests\Unit;

use Symfony\Contracts\HttpClient\HttpClientInterface;
use Symfony\Contracts\HttpClient\ResponseInterface;

trait WithFakeHttpClient
{
    private function mockHttpClient(string $responseBody = ''): HttpClientInterface
    {
        $response = $this->createMock(ResponseInterface::class);

It seems like createMock() must be provided by classes using this trait. How about adding it as abstract method to this trait?

        $response->method('getContent')->willReturn($responseBody);

        $httpClient = $this->createMock(HttpClientInterface::class);
        $httpClient->method('request')->willReturn($response);

        return $httpClient;
    }
}