def test_update_rank(level, offset, expected, problems_dir):
"""Check whether updating the rank works correctly."""
p = Problems(problems_dir)
p.level = level
p.offset = offset
p.update_rank()
assert expected == (p.level, p.offset)
def test_rank(level, rank, problems_dir):
"""Check whether the rank is correctly calculated."""
p = Problems(problems_dir)
p.level = level
assert p.rank == rank == p.get_rank(level)
assert p.pretty_rank == '%d %s' % rank
