Resolve Can not export Coupon Code to CSV,XML issue29277

app/code/Magento/SalesRule/Controller/Adminhtml/Promo/Quote/ExportCouponsCsv.php

@@ -15,13 +15,14 @@
 use Magento\Framework\View\Result\Layout;
 use Magento\Framework\App\ResponseInterface;
 use Magento\Framework\App\Action\HttpGetActionInterface;
+use Magento\Framework\App\Action\HttpPostActionInterface;
 
 /**
  * Export Coupons to csv file
  *
  * Class \Magento\SalesRule\Controller\Adminhtml\Promo\Quote\ExportCouponsCsv
  */
-class ExportCouponsCsv extends Quote implements HttpGetActionInterface
+class ExportCouponsCsv extends Quote implements HttpGetActionInterface, HttpPostActionInterface
 {
     /**
      * Export coupon codes as CSV file

app/code/Magento/SalesRule/Controller/Adminhtml/Promo/Quote/ExportCouponsXml.php

@@ -15,13 +15,14 @@
 use Magento\Framework\View\Result\Layout;
 use Magento\Framework\App\ResponseInterface;
 use Magento\Framework\App\Action\HttpGetActionInterface;
+use Magento\Framework\App\Action\HttpPostActionInterface;
 
 /**
  * Export coupons to xml file
  *
  * Class \Magento\SalesRule\Controller\Adminhtml\Promo\Quote\ExportCouponsXml
  */
-class ExportCouponsXml extends Quote implements HttpGetActionInterface
+class ExportCouponsXml extends Quote implements HttpGetActionInterface, HttpPostActionInterface
 {
     /**
      * Export coupon codes as excel xml file

dev/tests/integration/testsuite/Magento/SalesRule/Controller/Adminhtml/Promo/Quote/ExportCoupons/ExportCouponsCsvTest.php

@@ -0,0 +1,108 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\SalesRule\Controller\Adminhtml\Promo\Quote\ExportCoupons;
+
+use Magento\Framework\App\ResourceConnection;
+use Magento\SalesRule\Model\ResourceModel\Rule\Collection as RuleCollection;
+use Magento\SalesRule\Model\Rule;
+use Magento\TestFramework\TestCase\AbstractBackendController;
+use Magento\TestFramework\Helper\Bootstrap;
+
+/**
+ * Test export coupon csv
+ *
+ * Verify export csv
+ * @magentoAppArea adminhtml
+ * @magentoDataFixture Magento/SalesRule/_files/cart_rule_with_coupon_list.php
+ */
+class ExportCouponsCsvTest extends AbstractBackendController
+{
+    /**
+     * @var string
+     */
+    protected $uri = 'backend/sales_rule/promo_quote/exportCouponsCsv';
+
+    /**
+     * @var string
+     */
+    protected $resource = 'Magento_SalesRule::quote';
+
+    /**
+     * @var Rule
+     */
+    private $salesRule;
+
+    /**
+     * @var ResourceConnection
+     */
+    private $resourceConnection;
+
+    /**
+     * @inheritdoc
+     */
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->resourceConnection = Bootstrap::getObjectManager()->get(ResourceConnection::class);
+        $this->initSalesRule();
+    }
+
+    /**
+     * Prepare request
+     *
+     * @return void
+     */
+    private function prepareRequest(): void
+    {
+        $couponList = $this->getCouponsIdList();
+        if (count($couponList)) {
+            $this->getRequest()->setParams(['internal_ids' => $couponList[0]])->setMethod('POST');
+        }
+    }
+
+    /**
+     * Init current sales rule
+     *
+     * @return void
+     */
+    private function initSalesRule(): void
+    {
+        /** @var RuleCollection $collection */
+        $collection = Bootstrap::getObjectManager()->create(RuleCollection::class);
+        $collection->addFieldToFilter('name', 'Rule with coupon list');
+        $this->salesRule = $collection->getFirstItem();
+    }
+
+    /**
+     * Retrieve id list of coupons
+     *
+     * @return array
+     */
+    private function getCouponsIdList(): array
+    {
+        $select = $this->resourceConnection->getConnection()
+            ->select()
+            ->from($this->resourceConnection->getTableName('salesrule_coupon'))
+            ->columns(['coupon_id'])
+            ->where('rule_id=?', $this->salesRule->getId());
+
+        return $this->resourceConnection->getConnection()->fetchCol($select);
+    }
+
+    /**
+     * Test export csv
+     *
+     * @return void
+     */
+    public function testExportCsv(): void
+    {
+        $this->prepareRequest();
+        $this->dispatch($this->uri);
+        $this->assertStringNotContainsString('404 Error', $this->getResponse()->getBody());
+    }
+}

dev/tests/integration/testsuite/Magento/SalesRule/Controller/Adminhtml/Promo/Quote/ExportCoupons/ExportCouponsXmlTest.php

@@ -0,0 +1,108 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\SalesRule\Controller\Adminhtml\Promo\Quote\ExportCoupons;
+
+use Magento\Framework\App\ResourceConnection;
+use Magento\SalesRule\Model\ResourceModel\Rule\Collection as RuleCollection;
+use Magento\SalesRule\Model\Rule;
+use Magento\TestFramework\TestCase\AbstractBackendController;
+use Magento\TestFramework\Helper\Bootstrap;
+
+/**
+ * Test export coupon xml
+ *
+ * Verify export xml
+ * @magentoAppArea adminhtml
+ * @magentoDataFixture Magento/SalesRule/_files/cart_rule_with_coupon_list.php
+ */
+class ExportCouponsXmlTest extends AbstractBackendController
+{
+    /**
+     * @var string
+     */
+    protected $uri = 'backend/sales_rule/promo_quote/exportCouponsXml';
+
+    /**
+     * @var string
+     */
+    protected $resource = 'Magento_SalesRule::quote';
+
+    /**
+     * @var Rule
+     */
+    private $salesRule;
+
+    /**
+     * @var ResourceConnection
+     */
+    private $resourceConnection;
+
+    /**
+     * @inheritdoc
+     */
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->resourceConnection = Bootstrap::getObjectManager()->get(ResourceConnection::class);
+        $this->initSalesRule();
+    }
+
+    /**
+     * Prepare request
+     *
+     * @return void
+     */
+    private function prepareRequest(): void
+    {
+        $couponList = $this->getCouponsIdList();
+        if (count($couponList)) {
+            $this->getRequest()->setParams(['internal_ids' => $couponList[0]])->setMethod('POST');
+        }
+    }
+
+    /**
+     * Init current sales rule
+     *
+     * @return void
+     */
+    private function initSalesRule(): void
+    {
+        /** @var RuleCollection $collection */
+        $collection = Bootstrap::getObjectManager()->create(RuleCollection::class);
+        $collection->addFieldToFilter('name', 'Rule with coupon list');
+        $this->salesRule = $collection->getFirstItem();
+    }
+
+    /**
+     * Retrieve id list of coupons
+     *
+     * @return array
+     */
+    private function getCouponsIdList(): array
+    {
+        $select = $this->resourceConnection->getConnection()
+            ->select()
+            ->from($this->resourceConnection->getTableName('salesrule_coupon'))
+            ->columns(['coupon_id'])
+            ->where('rule_id=?', $this->salesRule->getId());
+
+        return $this->resourceConnection->getConnection()->fetchCol($select);
+    }
+
+    /**
+     * Test export xml
+     *
+     * @return void
+     */
+    public function testExportCsv(): void
+    {
+        $this->prepareRequest();
+        $this->dispatch($this->uri);
+        $this->assertStringNotContainsString('404 Error', $this->getResponse()->getBody());
+    }
+}