public function Test_of_actsAsTree_instatiation() { $Categories = new Category(); $this->assertEqual($Categories->actsLike(), 'active record,tree'); $this->assertEqual($Categories->tree->_parent_column_name, 'parent_id'); $Categories = new Category(); $this->assertErrorPattern('/columns are required/', $Categories->actsAs('tree', array('parent_column' => 'not_available'))); $this->assertEqual($Categories->actsLike(), 'active record'); }