public function testSetAndGetAndAddProjectCategories()
{
$project = new Project();
$category = new Category();
$project->addCategory($category);
$categories = $project->getCategories();
$this->assertEquals($categories->count(), 1);
$this->assertTrue(\is_a($categories, 'Doctrine\\Common\\Collections\\ArrayCollection'), 2);
$project->setCategories($categories);
$this->assertEquals($project->getCategories(), $categories);
}