def test_records_out_of_stock_event_if_cannot_allocate():
batch = Batch('batch1', 'SMALL-FORK', 10, eta=today)
product = Product(sku="SMALL-FORK", batches=[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_allocating_to_a_batch_reduces_the_available_quantity():
batch = Batch("batch-001", "SMALL-TABLE", qty=20, eta=date.today())
line = OrderLine('order-ref', "SMALL-TABLE", 2)
batch.allocate(line)
assert batch.available_quantity == 18
def test_returns_allocated_batch_id():
warehouse_batch = Batch('wh-batch', 'sku1', 100, eta=None)
shipment_batch = Batch('sh-batch', 'sku1', 100, eta=tomorrow)
line = OrderLine('oref', 'sku1', 10)
product = Product(sku='sku1', batches=[warehouse_batch, shipment_batch])
allocation = product.allocate(line, )
assert allocation == 'wh-batch'
def test_returns_allocated_batch_ref():
in_stock_batch = Batch("in-stock-batch-ref", "HIGHBROW-POSTER", 100, eta=None)
shipment_batch = Batch("shipment-batch-ref", "HIGHBROW-POSTER", 100, eta=tomorrow)
line = OrderLine("oref", "HIGHBROW-POSTER", 10)
product = Product(sku="HIGHBROW-POSTER", batches=[in_stock_batch, shipment_batch])
allocation = product.allocate(line)
assert allocation == in_stock_batch.reference
def test_increments_version_number():
line = OrderLine('oref', "SCANDI-PEN", 10)
product = Product(sku="SCANDI-PEN",
batches=[Batch('b1', "SCANDI-PEN", 100, eta=None)])
product.version_number = 7
product.allocate(line)
assert product.version_number == 8
def test_records_out_of_stock_event_if_cannot_allocate():
batch = Batch("batch1", "HEAVY-SPOON", 100, eta=today)
different_sku_line = OrderLine("oref", "SMALL-FORK", 10)
product = Product(sku="HEAVY-SPOON", batches=[batch])
allocation = product.allocate(different_sku_line)
assert product.events[-1] == events.OutOfStock(sku="SMALL-FORK")
assert allocation is None
def allocate(cmd: commands.Allocate, uow: unit_of_work.AbstractUnitOfWork):
line = OrderLine(cmd.orderid, cmd.sku, cmd.qty)
with uow:
product = uow.products.get(sku=line.sku)
if product is None:
raise exceptions.InvalidSku(f'Invalid sku {line.sku}')
product.allocate(line)
uow.commit()
def test_records_out_of_stock_event_if_cannot_allocate():
sku1_batch = Batch('batch1', 'sku1', 100, eta=today)
sku2_line = OrderLine('oref', 'sku2', 10)
product = Product(sku='sku1', batches=[sku1_batch])
allocation = product.allocate(sku2_line)
assert product.events[-1] == events.OutOfStock(sku='sku2')
assert allocation is None
def test_outputs_allocated_event():
batch = Batch("batchref", "RETRO-LAMPSHADE", 100, eta=None)
line = OrderLine("oref", "RETRO-LAMPSHADE", 10)
product = Product(sku="RETRO-LAMPSHADE", batches=[batch])
product.allocate(line)
expected = events.Allocated(
orderid="oref", sku="RETRO-LAMPSHADE", qty=10, batchref=batch.reference
)
assert product.events[-1] == expected
def test_prefers_warehouse_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)
product = Product(sku="RETRO-CLOCK", batches=[in_stock_batch, shipment_batch])
line = OrderLine("oref", "RETRO-CLOCK", 10)
product.allocate(line)
assert in_stock_batch.available_quantity == 90
assert shipment_batch.available_quantity == 100
def test_prefers_warehouse_batches_to_shipments():
warehouse_batch = Batch('wh-batch', 'sku1', 100, eta=None)
shipment_batch = Batch('sh-batch', 'sku1', 100, eta=tomorrow)
product = Product(sku='sku1', batches=[warehouse_batch, shipment_batch])
line = OrderLine('oref', 'sku1', 10)
product.allocate(line)
assert warehouse_batch.available_quantity == 90
assert shipment_batch.available_quantity == 100
def test_prefers_earlier_batches():
earliest = Batch('sh-batch', 'sku1', 100, eta=today)
medium = Batch('sh-batch', 'sku1', 100, eta=tomorrow)
latest = Batch('sh-batch', 'sku1', 100, eta=later)
product = Product(sku='sku1', batches=[medium, earliest, latest])
line = OrderLine('oref', 'sku1', 10)
product.allocate(line)
assert earliest.available_quantity == 90
assert medium.available_quantity == 100
assert latest.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)
product = Product(sku="MINIMALIST-SPOON", batches=[medium, earliest, latest])
line = OrderLine("order1", "MINIMALIST-SPOON", 10)
product.allocate(line)
assert earliest.available_quantity == 90
assert medium.available_quantity == 100
assert latest.available_quantity == 100
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=date.today() + timedelta(days=1))
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=date.today())
medium = Batch("normal-batch",
"MINIMALIST-SPOON",
100,
eta=date.today() + timedelta(days=1))
latest = Batch("slow-batch",
"MINIMALIST-SPOON",
100,
eta=date.today() + timedelta(days=2))
line = OrderLine("order1", "MINIMALIST-SPOON", 10)
allocate(line, [medium, earliest, latest])
assert earliest.available_quantity == 90
assert medium.available_quantity == 100
assert latest.available_quantity == 100
def test_cannot_allocate_if_skus_do_not_match():
batch = Batch("batch-001", "UNCOMFORTABLE-CHAIR", 100, eta=None)
different_sku_line = OrderLine("order-123", "EXPENSIVE-TOASTER", 10)
assert batch.can_allocate(different_sku_line) is False
def make_batch_and_line(sku, batch_qty, line_qty):
return (Batch("batch-001", sku, batch_qty,
eta=date.today()), OrderLine("order-123", sku, line_qty))
def test_cannot_allocate_if_skus_do_not_match():
batch = Batch("batch-001", 'sku1', 100, eta=None)
line = OrderLine("order-123", 'sku2', 10)
assert batch.can_allocate(line) is False
def test_raises_out_of_stock_exception_if_cannot_allocate():
batch = Batch("batch1", "SMALL-FORK", 10, eta=date.today())
allocate(OrderLine("order1", "SMALL-FORK", 10), [batch])
with pytest.raises(OutOfStock, match="SMALL-FORK"):
allocate(OrderLine("order2", "SMALL-FORK", 1), [batch])