Mocking service container in D8 unit test

test.php

    $fakeService = $this->createMock('Drupal\fake\Services\Fake');
    $fakeService->method('serviceMethod')
      ->withAnyParameters()
      ->willReturn(0);

    $container = new ContainerBuilder();
    $container->set('fake.service_name', $fakeService);
    \Drupal::setContainer($container);