def test_xp_level_up_using_decimal():
xp = XP(1)
xp.increase(1.0 / 4)
assert xp.xp == 75
def test_xp_level_up():
xp = XP(1)
xp.increase(1)
assert xp.xp == 300
def test_xp_level_up_even_more():
xp = XP(5)
xp.increase(2)
assert xp.xp == 500