def test_counter_two_points():
counter = Counter()
counter.add_point(2)
assert counter.points == 2
def test_counter_reset_points():
counter = Counter()
counter.points = 15
counter.reset_points()
assert counter.points == 0
def test_counter_one_point():
counter = Counter()
counter.add_point()
assert counter.points == 1
def test_counter_is_zero_when_init():
counter = Counter()
assert counter.points == 0
def test_counter_zero_when_tried_subtract_more_then_i_have():
counter = Counter()
counter.points = 1
counter.subtract_point(3)
assert counter.points == 0
def test_counter_subtract_two_points():
counter = Counter()
counter.points = 10
counter.subtract_point(2)
assert counter.points == 8
def test_counter_subtract_one_point():
counter = Counter()
counter.points = 30
counter.subtract_point()
assert counter.points == 29