Add feature coverage for platform order export refund receipt fields

tests/Feature/AdminPlatformOrderExportRefundReceiptFieldsTest.php

@@ -0,0 +1,99 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Models\Merchant;
+use App\Models\Plan;
+use App\Models\PlatformOrder;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminPlatformOrderExportRefundReceiptFieldsTest extends TestCase
+{
+    use RefreshDatabase;
+
+    protected function loginAsPlatformAdmin(): void
+    {
+        $this->seed();
+
+        $this->post('/admin/login', [
+            'email' => 'platform.admin@demo.local',
+            'password' => 'Platform@123456',
+        ])->assertRedirect('/admin');
+    }
+
+    public function test_export_includes_latest_refund_fields_and_total(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $merchant = Merchant::query()->firstOrFail();
+        $plan = Plan::query()->create([
+            'code' => 'export_refund_fields_plan',
+            'name' => '导出退款字段测试套餐',
+            'billing_cycle' => 'monthly',
+            'price' => 10,
+            'list_price' => 10,
+            'status' => 'active',
+            'sort' => 10,
+            'published_at' => now(),
+        ]);
+
+        PlatformOrder::query()->create([
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'order_no' => 'PO_EXPORT_REFUND_FIELDS_0001',
+            'order_type' => 'new_purchase',
+            'status' => 'activated',
+            'payment_status' => 'partially_refunded',
+            'plan_name' => $plan->name,
+            'billing_cycle' => $plan->billing_cycle,
+            'period_months' => 1,
+            'quantity' => 1,
+            'payable_amount' => 10,
+            'paid_amount' => 10,
+            'placed_at' => now(),
+            'paid_at' => now(),
+            'activated_at' => now(),
+            'meta' => [
+                'refund_receipts' => [
+                    [
+                        'type' => 'refund',
+                        'channel' => 'alipay',
+                        'amount' => 1.23,
+                        'refunded_at' => now()->subDay()->format('Y-m-d H:i:s'),
+                        'note' => '第一次退款',
+                    ],
+                    [
+                        'type' => 'refund',
+                        'channel' => 'wechat',
+                        'amount' => 4.56,
+                        'refunded_at' => now()->format('Y-m-d H:i:s'),
+                        'note' => '第二次退款',
+                    ],
+                ],
+                'refund_summary' => [
+                    'count' => 2,
+                    'total_amount' => 5.79,
+                ],
+            ],
+        ]);
+
+        $res = $this->get('/admin/platform-orders/export');
+        $res->assertOk();
+
+        $content = $res->streamedContent();
+
+        // 关键字段存在
+        $this->assertStringContainsString('退款记录数', $content);
+        $this->assertStringContainsString('最近退款时间', $content);
+        $this->assertStringContainsString('最近退款金额', $content);
+        $this->assertStringContainsString('最近退款渠道', $content);
+        $this->assertStringContainsString('退款总额', $content);
+
+        // 行数据存在
+        $this->assertStringContainsString('PO_EXPORT_REFUND_FIELDS_0001', $content);
+        $this->assertStringContainsString('wechat', $content);
+        $this->assertStringContainsString('5.79', $content);
+        $this->assertStringContainsString('4.56', $content);
+    }
+}