add tests batch 20

tests/Unit/Services/PurchaseOrders/PurchaseOrderCreateServiceTest.php

@@ -16,7 +16,7 @@ class PurchaseOrderCreateServiceTest extends TestCase
         $supplierId = DB::table('suppliers')->insertGetId(['name' => 'Alpha Supplies']);
         $supplyId = DB::table('supplies')->insertGetId(['name' => 'Paper', 'unit' => 'box', 'qty_on_hand' => 0]);
 
-        $service = new PurchaseOrderCreateService;
+        $service = new PurchaseOrderCreateService();
         $po = $service->create([
             'po_number' => 'PO-500',
             'supplier_id' => $supplierId,

tests/Unit/Services/PurchaseOrders/PurchaseOrderReceiveServiceTest.php

@@ -39,7 +39,7 @@ class PurchaseOrderReceiveServiceTest extends TestCase
             'unit_cost' => 3,
         ]);
 
-        $service = new PurchaseOrderReceiveService;
+        $service = new PurchaseOrderReceiveService();
         $result = $service->receive($po->id, [
             ['id' => $item->id, 'quantity' => 3],
         ], 'tester@example.com');

tests/Unit/Services/PurchaseOrders/PurchaseOrderStatusServiceTest.php

@@ -22,7 +22,7 @@ class PurchaseOrderStatusServiceTest extends TestCase
             'total' => 0,
         ]);
 
-        $service = new PurchaseOrderStatusService;
+        $service = new PurchaseOrderStatusService();
         $updated = $service->cancel($po->id);
 
         $this->assertSame(PurchaseOrder::STATUS_CANCELED, $updated->status);