function test_getRestaurants()
{
//arrange
$name = "peanuts";
$test_allergen = new Allergen($name);
$test_allergen->save();
$test_allergen_id = $test_allergen->getId();
$restaurant_name = "Taco Hell";
$test_restaurant = new Restaurant($restaurant_name, $test_allergen_id);
$test_restaurant->save();
$restaurant_name2 = "Burger Queen";
$test_restaurant2 = new Restaurant($restaurant_name2, $test_allergen_id);
$test_restaurant2->save();
//act
$result = $test_allergen->getRestaurants();
//assert
$this->assertEquals([$test_restaurant, $test_restaurant2], $result);
}
function test_getRestaurants()
{
//arrange
$name = "peanuts";
$test_allergen = new Allergen($name);
$test_allergen->save();
$test_allergen_id = $test_allergen->getId();
$restaurant_name = "Taco Hell";
$test_restaurant = new Restaurant($restaurant_name);
$test_restaurant->save();
$restaurant_name2 = "Burger Queen";
$test_restaurant2 = new Restaurant($restaurant_name2);
$test_restaurant2->save();
//act
//addRestaurant and getRestaurant are dependent on each other!
$test_allergen->addRestaurant($test_restaurant);
$test_allergen->addRestaurant($test_restaurant2);
$result = $test_allergen->getRestaurants();
//assert
$this->assertEquals([$test_restaurant, $test_restaurant2], $result);
}