ACP2E-877: Customers not filtered by 'Signed up point' when creating an order in Admin

 - Added the test coverage and fixed the static build test failure.

Author: devarul

app/code/Magento/Sales/Model/ResourceModel/Order/Customer/Collection.php

@@ -158,6 +158,7 @@ protected function beforeAddLoadedItem(DataObject $item): DataObject
 
     /**
      * @inheritDoc
+     *
      * @throws LocalizedException
      */
     public function addFieldToFilter($field, $condition = null)

dev/tests/integration/testsuite/Magento/Sales/Model/ResourceModel/Order/Customer/CollectionTest.php

@@ -7,6 +7,7 @@
 
 namespace Magento\Sales\Model\ResourceModel\Order\Customer;
 
+use Magento\Framework\Exception\LocalizedException;
 use Magento\Framework\ObjectManagerInterface;
 use Magento\Store\Api\StoreRepositoryInterface;
 use Magento\Store\Api\WebsiteRepositoryInterface;
@@ -50,4 +51,38 @@ public function testCollection(): void
         $this->assertEquals($website->getName(), $customer->getWebsiteName());
         $this->assertEquals($store->getName(), $customer->getStoreName());
     }
+
+    /**
+     * Test customer collection with the website and the store name filter.
+     *
+     * @throws LocalizedException
+     * @see \Magento\Customer\Model\ResourceModel\Customer\Collection::addFieldToFilter()
+     *
+     * @magentoDataFixture Magento/Customer/_files/customer_for_second_website.php
+     */
+    public function testCollectionWithWebsiteStoreFilter(): void
+    {
+        /** @var Collection $customerCollection */
+        $customerCollection = $this->objectManager->create(Collection::class);
+
+        $customer = $customerCollection->getItems();
+        $customer = array_shift($customer);
+
+        /** @var WebsiteRepositoryInterface $websiteRepository */
+        $websiteRepository = $this->objectManager->get(WebsiteRepositoryInterface::class);
+        $website = $websiteRepository->getById($customer->getWebsiteId());
+
+        /** @var StoreRepositoryInterface $storeRepository */
+        $storeRepository = $this->objectManager->get(StoreRepositoryInterface::class);
+        $store = $storeRepository->getById($customer->getStoreId());
+
+        $customerCollectionWithStoreWebsiteFilter = $customerCollection
+            ->addFieldToFilter('store_name', $store->getName())
+            ->addFieldToFilter('website_name', $website->getName());
+        $customerWithStoreWebsiteFilter = $customerCollectionWithStoreWebsiteFilter->getItems();
+        $customerWithStoreWebsiteFilter = array_shift($customerWithStoreWebsiteFilter);
+
+        $this->assertEquals($website->getName(), $customerWithStoreWebsiteFilter->getWebsiteName());
+        $this->assertEquals($store->getName(), $customerWithStoreWebsiteFilter->getStoreName());
+    }
 }