Overrides \Drupal\simpletest\DrupalUnitTestBase::containerBuild().
Overrides DrupalUnitTestBase::containerBuild
public function containerBuild(ContainerBuilder $container) {
parent::containerBuild($container);
$route_collection = $this
->getTestRouteCollection();
$container
->register('router.route_provider', 'Drupal\\system\\Tests\\Routing\\MockRouteProvider')
->addArgument($route_collection);
}