def test_change_battalion_strength(self):
horses, elephants, armoured_tanks, sling_guns = 100, 50, 10, 5
army = Army(horses=horses, elephants=elephants,
armoured_tanks=armoured_tanks, sling_guns=sling_guns)
army.update_battalion_strength(BattalionType.HORSES, -50)
army.update_battalion_strength(BattalionType.SLINGGUNS, 5)
assert army.get_battalion_strength(BattalionType.HORSES) == 50
assert army.get_battalion_strength(BattalionType.SLINGGUNS) == 10
def test_change_battalion_strength_1(self):
army = Army()
army.update_battalion_strength(BattalionType.HORSES, 50)
assert army.get_battalion_strength(BattalionType.HORSES) == 50