# TDD - Test Driven Development
from random import choice


def greet(name, isEnemy):
	if not isinstance(isEnemy, bool)
		raise ValueError('isEnemy must be a boolean type')
	if isEnemy:
		return f'Hello {name}! I will kill you, bastard!'
	else:
		return f'Hello {name}! How are you?'


def eat_burgers(number):
	if number > 3:
		return f'Oh! I overate!'
	else:
		return f'Mmm! That was excellent!'


def can_fly(name):
	if name == 'Batman':
		return True
	else:
		return False


def get_arsenal():
	return choice(('knife', 'handgun', 'machine gun'))
	


