Symfony\Component\Workflow\DefinitionBuilder::addPlace PHP Method

    public function addPlace($place)
    {
        if (!preg_match('{^[\\w\\d_-]+$}', $place)) {
            throw new InvalidArgumentException(sprintf('The place "%s" contains invalid characters.', $place));
        }
        if (!$this->places) {
            $this->initialPlace = $place;
        }
        $this->places[$place] = $place;
    }

 public function testAddPlace()
 {
     $builder = new DefinitionBuilder(array('a'), array());
     $builder->addPlace('b');
     $definition = $builder->build();
     $this->assertCount(2, $definition->getPlaces());
     $this->assertEquals('a', $definition->getPlaces()['a']);
     $this->assertEquals('b', $definition->getPlaces()['b']);
 }