def test_not_positive_goal_exception():
with pytest.raises(ValueError):
get_number_books_read(0)
with pytest.raises(ValueError):
get_number_books_read(-1)
def test_past_date_exception():
with pytest.raises(ValueError):
get_number_books_read(52, '5-20-2018')
def test_get_number_books_read(goal, date_str, expected):
assert get_number_books_read(goal, date_str) == expected
