function test_getRestaurantId() { //Arrange $restaurant_name = "McDonalds"; $id = null; $test_restaurant = new Restaurant($restaurant_name, $id); $test_restaurant->save(); $cuisine_name = "Tacos"; $restaurant_id = $test_restaurant->getId(); $test_cuisine = new Cuisine($cuisine_name, $id, $restaurant_id); $test_cuisine->save(); //Act $result = $test_cuisine->getRestaurantId(); //Assert $this->assertEquals(true, is_numeric($result)); }