def test_order_dictionary_by_dates_behaves_nicely():
groups = data.group_data_by_date(data_sets)
ordered_dict = data.order_dictionary_by_date(groups)
keys = list(ordered_dict.keys())
assert keys == list(sorted(keys))
def test_order_dictionary_by_dates_yields_ordered_dict():
assert isinstance(data.order_dictionary_by_date({}), OrderedDict)
