def test_prep_accuracy(self, trajs, expected_result):
"""
This function tests Pipelines.prep(trajs), where trajs
is a dictionary containing numpy arrays.
"""
result = Pipelines.prep(trajs)
np.testing.assert_equal(result, expected_result)
def test_prep_exceptions(self, trajs):
with pytest.raises(Exception):
Pipelines.prep(trajs)