def test_records_out_of_stock_event_if_cannot_allocate():
batch = Batch('batch1', 'SMALL-FORK', 10, eta=today)
product = Product('SMALL-FORK', [batch])
product.allocate(OrderLine('order1', 'SMALL-FORK', 10))
allocation = product.allocate(OrderLine('order2', 'SMALL-FORK', 1))
assert product.events[-1] == events.OutOfStock(sku='SMALL-FORK')
assert allocation is None
def test_prefers_current_stock_batches_to_shipments():
in_stock_batch = Batch('in-stock-batch', 'RETRO-CLOCK', 100, eta=None)
shipment_batch = Batch('shipment-batch', 'RETRO-CLOCK', 100, eta=tomorrow)
line = OrderLine('oref', 'RETRO-CLOCK', 10)
allocate(line, [in_stock_batch, shipment_batch])
assert in_stock_batch.available_quantity == 90
assert shipment_batch.available_quantity == 100
def test_prefers_earlier_batches():
earliest = Batch('speedy-batch', 'MINIMALIST-SPOON', 100, eta=today)
medium = Batch('normal-batch', 'MINIMALIST-SPOON', 100, eta=tomorrow)
latest = Batch('slow-batch', 'MINIMALIST-SPOON', 100, eta=later)
line = OrderLine('oref1', 'MINIMALIST-SPOON', 10)
allocate(line, [earliest, medium, latest])
assert earliest.available_quantity == 90
assert medium.available_quantity == 100
assert latest.available_quantity == 100
def test_returns_allocated_batch_ref():
in_stock_batch = Batch('in-stock-batch', 'HIGHBROW-POSTER', 100, eta=None)
shipment_batch = Batch('shipment-batch',
'HIGHBROW-POSTER',
100,
eta=tomorrow)
line = OrderLine('oref', 'HIGHBROW-POSTER', 10)
allocation = allocate(line, [in_stock_batch, shipment_batch])
assert allocation == in_stock_batch.reference
assert in_stock_batch.available_quantity == 90
assert shipment_batch.available_quantity == 100
def test_repository_can_retrieve_a_batch_wit_allocations(session):
orderline_id = insert_order_line(session)
batch1_id = insert_batch(session, 'batch1')
insert_batch(session, 'batch2')
insert_allocation(session, orderline_id, batch1_id)
repo = repository.SqlAlchemyRepository(session)
retrieved = repo.get('batch1')
expected = Batch('batch1', 'GENERIC-SOFA', 100, eta=None)
assert retrieved == expected #batch.__eq__ only compares reference
assert retrieved.sku == expected.sku
assert retrieved._purchased_quantity == expected._purchased_quantity
assert retrieved._allocations == {
OrderLine('order1', 'GENERIC-SOFA', 12),
}
def test_raises_out_of_stock_exception_if_cannot_allocate():
batch = Batch('batch1', 'SMALL-FORK', 10, eta=today)
allocate(OrderLine('order1', 'SMALL-FORK', 10), [batch])
with pytest.raises(OutOfStock, match='SMALL-FORK'):
allocate(OrderLine('order2', 'SMALL-FORK', 1), [batch])
def make_bath_and_line(sku, batch_qty, line_qty):
return (Batch('batch-001', sku, qty=batch_qty,
eta=date.today), OrderLine('order-123', sku, line_qty))
def test_cannot_allocate_if_skus_do_not_match():
batch = Batch('batch-001', 'ELEGANTE-LAMP', qty=2, eta=date.today)
line = OrderLine('order-123', 'SMALL-TABLE', 2)
assert batch.can_allocate(line) is False