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); }