@covers Symfony\Component\DependencyInjection\ContainerBuilder::addAliases
public function testAddAliases() {
$builder = new ContainerBuilder();
$builder
->setAliases(array(
'bar' => 'foo',
));
$builder
->addAliases(array(
'foobar' => 'foo',
));
$aliases = $builder
->getAliases();
$this
->assertTrue(isset($aliases['bar']));
$this
->assertTrue(isset($aliases['foobar']));
}