Functional test on a ZF2 application

AbstractFunctionalTestCase.php

<?php

use Zend\Test\PHPUnit\Controller\AbstractControllerTestCase as TestCase;

abstract class AbstractFunctionalTestCase extends TestCase
{
    public function setUp()
    {
        // assumes cwd is project root
        $config = include 'config/application.config.php';

        $config['config_cache_enabled'] = false;
        
        // loads *test.php files from `config/autoload`
        $config['module_listener_options']['config_glob_paths'] = [
            'config/autoload/{,*.}{global,test}.php',
        ];

        $this->setApplicationConfig($config);

        parent::setUp();
    }
}

SomeServiceFunctionalTest.php

<?php

class SomeServiceFunctionalTest extends AbstractFunctionalTestCase
{
    public fucntion testFunctionalDI()
    {
        $dependency  = $this->getApplicationServiceLocator()->get('ConcreteDependency');
        $someService = new SomeService($dependency);
        
        // run assertions on $someService;
    }
}