def test__pair_up_should_return_n_tuples():
pool = reproduction.reproduce(params)
mated_seeds = crossover._pair_up(pool)
for mated in mated_seeds:
assert isinstance(mated, tuple)
def test__pair_up_should_return_1_tuple():
pool = reproduction.reproduce(params)
mated_seeds = crossover._pair_up(pool)
assert len(mated_seeds) >= 1
