Correctif : erreur division par zero

Solver/Product/ProductFamilySolver.php

 
     public function getQuantityInherited(ProductFamilyInterface $productFamily): ?float
     {
-        return $productFamily->getQuantity();
+        if($productFamily->getQuantity()){
+            return $productFamily->getQuantity();
+        }else{
+            return 1;
+        }
     }
 
     public function getUnitInherited(ProductFamilyInterface $productFamily)

Solver/Product/ProductSolver.php

     {
         if ($product->getQuantity()) {
             return $product->getQuantity();
-        } else {
+        } else if($product->getProductFamily()->getQuantity()){
             return $product->getProductFamily()->getQuantity();
+        }else{
+            return 1;
         }
     }