def test_warehouse_retrieves_specified_packet_range():
warehouse = Warehouse(
{'packet_id': {'storage': "some/directory", 'interval': 30, 'pair': 'SMNPAR'},
'other_pkt': {'storage': "some/directory", 'interval': 60, 'pair': 'SMNPAR'}})
assert warehouse.retrieve('packet_id', since=1500000000, until=1500001000) == Data(from_dir="some/directory/SMNPAR",
with_interval=30,
with_since=1500000000,
with_until=1500001000)
def test_warehouse_raises_an_error_when_accessing_non_existent_packet():
warehouse = Warehouse({})
with pytest.raises(MissingPacketError):
warehouse.retrieve("some_packet_id")
with pytest.raises(MissingPacketError):
warehouse.update("some_packet_id")