Symfony\Component\DependencyInjection\Tests\ContainerBuilderTest::testCreateServiceFactory PHP Method

    public function testCreateServiceFactory()
    {
        $builder = new ContainerBuilder();
        $builder->register('foo', 'Bar\FooClass')->setFactory('Bar\FooClass::getInstance');
        $builder->register('qux', 'Bar\FooClass')->setFactory(array('Bar\FooClass', 'getInstance'));
        $builder->register('bar', 'Bar\FooClass')->setFactory(array(new Definition('Bar\FooClass'), 'getInstance'));
        $builder->register('baz', 'Bar\FooClass')->setFactory(array(new Reference('bar'), 'getInstance'));

        $this->assertTrue($builder->get('foo')->called, '->createService() calls the factory method to create the service instance');
        $this->assertTrue($builder->get('qux')->called, '->createService() calls the factory method to create the service instance');
        $this->assertTrue($builder->get('bar')->called, '->createService() uses anonymous service as factory');
        $this->assertTrue($builder->get('baz')->called, '->createService() uses another service as factory');
    }