add test batches

app/Services/Discounts/DiscountApplyService.php

@@ -10,7 +10,6 @@ use Illuminate\Support\Facades\Log;
 class DiscountApplyService
 {
     private DiscountContextService $context;
-
     private DiscountInvoiceService $invoiceService;
 
     public function __construct(DiscountContextService $context, DiscountInvoiceService $invoiceService)
@@ -25,7 +24,7 @@ class DiscountApplyService
         $semester = $this->context->getSemester();
 
         $voucher = DiscountVoucher::query()->find($voucherId);
-        if (! $voucher) {
+        if (!$voucher) {
             return ['ok' => false, 'message' => 'Voucher not found.'];
         }
 
@@ -44,7 +43,7 @@ class DiscountApplyService
             return ['ok' => false, 'message' => 'This voucher has reached its maximum allowed uses.'];
         }
 
-        if (! $allowAdditional) {
+        if (!$allowAdditional) {
             $rows = DB::table('discount_usages as du')
                 ->select('i.parent_id')
                 ->join('invoices as i', 'i.id', '=', 'du.invoice_id')
@@ -56,7 +55,7 @@ class DiscountApplyService
                 ->all();
 
             $blockedParentIds = array_map(static fn ($r) => (int) ($r['parent_id'] ?? 0), $rows);
-            if (! empty($blockedParentIds)) {
+            if (!empty($blockedParentIds)) {
                 $parentIds = array_values(array_diff(array_map('intval', $parentIds), $blockedParentIds));
             }
             if (empty($parentIds)) {
@@ -82,7 +81,6 @@ class DiscountApplyService
                         'parent_id' => (int) $parentId,
                         'voucher_id' => $voucherId,
                     ]);
-
                     continue;
                 }
 
@@ -101,7 +99,7 @@ class DiscountApplyService
                         continue;
                     }
 
-                    if (! $allowAdditional) {
+                    if (!$allowAdditional) {
                         $exists = DB::table('discount_usages as du')
                             ->join('invoices as i', 'du.invoice_id', '=', 'i.id')
                             ->where('du.voucher_id', $voucherId)
@@ -199,7 +197,6 @@ class DiscountApplyService
             DB::commit();
         } catch (\Throwable $e) {
             DB::rollBack();
-
             return ['ok' => false, 'message' => 'Voucher application failed. Transaction rolled back.'];
         }
 
@@ -289,7 +286,7 @@ class DiscountApplyService
                 event('paymentReceived', [$eventData, $studentData]);
             }
         } catch (\Throwable $e) {
-            Log::warning('paymentReceived hook failed: '.$e->getMessage());
+            Log::warning('paymentReceived hook failed: ' . $e->getMessage());
         }
     }
 }