Go and write tests for the rest of the methods in the Robot class, and them implement them:
double checkBattery()- returns percentage of battery life left
String makeDrink (String drink)- passes in the name of the drink being made e.g. tea
- uses up 10% of the battery life
- returns the string "I am making" + drink
String washDishes()- uses up 30% of battery life
- returns the string "I am washing the dishes"
String doDusting()- uses up 20% of the battery life
- returns the string "I am dusting"
void rechargeBattery()- resets battery to 100.0
[i]: remember the delta when comparing floating point numbers