Instructions

Your majesty is hosting a dinner party in the Kalmar Unions capital Copenhagen. It is the biggest party of the year and all the nobles are invited. But rumors are spreading across the country that there is a plot to poison Your Majesty.

Her majesty has asked you, the royal poison finder, to find out if any food or drinks are poisoned. Your majesty is planning to serve only Mushroom pasties as food, but for drinks, there are a variety of drinks.

1. Check if the food is correct

There is a high chance that the food is poisoned if it is not what her majesty ordered. If the food is not what her majesty ordered, it should be tossed out.

Implement the check_food? method, which takes the argument food which holds the name of the food as a String. The method should return the food if it is Mushroom pasties; otherwise, it should return nil.

2. Check if the drink is poisoned

It is possible that the drink is poisoned, but it is a bit more difficult to tell if it is. The drink is poisoned if it does not include the letter i in the name, the casing doesn't matter. The drink should be tossed out if it is poisoned.

Implement the check_drink? method, which takes the argument drink which holds the drink's name as a String. The method should return the drink if it is not poisoned, otherwise it should return nil.

3. Replace the drink

Your majesty wouldn't want to make their guests worried about poison in their food. Therefore, if the drink is poisoned, it should be replaced with a new drink, specifically Apple juice.

Implement the replace_drink method, which takes the argument drink which holds the drink's name as a String. The method should return the drink if it is not poisoned, otherwise it should return "Apple juice".