add test batches

app/Models/DiscountUsage.php

@@ -2,6 +2,7 @@
 
 namespace App\Models;
 
+use App\Models\BaseModel;
 use Illuminate\Support\Facades\DB;
 
 class DiscountUsage extends BaseModel
@@ -23,12 +24,12 @@ class DiscountUsage extends BaseModel
     ];
 
     protected $casts = [
-        'voucher_id' => 'integer',
-        'invoice_id' => 'integer',
-        'discount_amount' => 'decimal:2',  // adjust precision if needed
-        'updated_by' => 'integer',
-        'parent_id' => 'integer',
-        'used_at' => 'datetime',
+        'voucher_id'       => 'integer',
+        'invoice_id'       => 'integer',
+        'discount_amount'  => 'decimal:2',  // adjust precision if needed
+        'updated_by'       => 'integer',
+        'parent_id'        => 'integer',
+        'used_at'          => 'datetime',
     ];
 
     /* Optional relationships */
@@ -55,4 +56,4 @@ class DiscountUsage extends BaseModel
 
         return (float) $total;
     }
-}
+}