test.php

<?php 

class MyTeamProviderTest extends WebTestCase
{
    /**
     * @dataProvider dataProvider
     */
    public function test_my_team()
    {
        $client = static::createClient();
        $userRepository = static::getContainer()->get(UserRepository::class);

        //lub inaczej wziąć usera
        $testUser = $userRepository->findOneByEmail('test@user.pl');

        $client->loginUser($testUser);

      //instancja serwisu
        $myTeamProvider = static::getContainer()->get(MyTeamProvider::class);

        $myTeam = $myTeamProvider->provide();

        $this->assertCount($expectedNumberOfProjects, $myTeam);

    }
}