can_allocate fn [can_allocate]

Author: hjwp

model.py

@@ -20,3 +20,6 @@ def __init__(self, ref: str, sku: str, qty: int, eta: Optional[date]):
 
     def allocate(self, line: OrderLine):
         self.available_quantity -= line.qty
+
+    def can_allocate(self, line: OrderLine) -> bool:
+        return self.sku == line.sku and self.available_quantity >= line.qty