public function testMerge()
 {
     $this->object->addPath('tests', FIXTURES_ROOT);
     $this->object->addPath('tests', dirname($this->dir));
     $collection = new PathCollection(array('tests' => array(FIXTURES_ROOT, $this->dir), 'another' => array($this->dir)));
     $this->object->merge($collection);
     $this->assertThat($this->object->getAll(), $this->equalTo(array(FIXTURES_ROOT, dirname($this->dir), $this->dir, $this->dir)));
     $this->assertThat($collection->getAll(), $this->equalTo(array(FIXTURES_ROOT, $this->dir, $this->dir)));
 }