fixup a sku

Author: hjwp

test_allocate.py

@@ -35,4 +35,4 @@ def test_returns_allocated_batch_ref():
     shipment_batch = Batch("shipment-batch-ref", "HIGHBROW-POSTER", 100, eta=tomorrow)
     line = OrderLine("oref", "HIGHBROW-POSTER", 10)
     allocation = allocate(line, [in_stock_batch, shipment_batch])
-    assert allocation == "in-stock-batch"
+    assert allocation == in_stock_batch.reference