feat(test): add unit test for SaleDetailResource serialization

tests/Unit/Sale/SaleDetailResourceTest.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace Tests\Unit\Sale;
+
+use App\Domains\Purchase\Models\Purchase;
+use App\Domains\Purchase\Models\PurchaseItem;
+use App\Domains\Sale\Resources\AdminApp\SaleDetailResource;
+use Illuminate\Http\Request;
+use Tests\TestCase;
+
+class SaleDetailResourceTest extends TestCase
+{
+    public function test_it_serializes_the_purchased_item_snapshot(): void
+    {
+        $purchase = (new Purchase)->forceFill([
+            'id' => 15,
+            'total' => '30000.00',
+        ]);
+        $item = (new PurchaseItem)->forceFill([
+            'id' => 8,
+            'item_nombre' => 'Comida',
+            'variant_attributes' => [
+                ['name' => 'Fecha', 'value' => ['2026-10-12']],
+            ],
+            'cantidad' => 3,
+            'precio_unitario' => '10000.00',
+            'total' => '30000.00',
+        ]);
+        $purchase->setRelation('items', collect([$item]));
+
+        $data = (new SaleDetailResource($purchase))->resolve(Request::create('/'));
+
+        $this->assertSame(15, $data['id']);
+        $this->assertSame('Comida', $data['items'][0]['product']);
+        $this->assertSame(['2026-10-12'], $data['items'][0]['event_dates']);
+        $this->assertSame(3, $data['items'][0]['quantity']);
+        $this->assertSame('10000.00', $data['items'][0]['unit_price']);
+        $this->assertSame('30000.00', $data['items'][0]['total']);
+        $this->assertSame('30000.00', $data['total']);
+    }
+}