ACP2E-2129: customer is reporting their table rates are not updating via CSV any longer

- fixed unit

Author: aplapana

app/code/Magento/OfflineShipping/Test/Unit/Model/ResourceModel/Carrier/TablerateTest.php

@@ -9,6 +9,7 @@
 
 use Magento\Framework\App\Config\ScopeConfigInterface;
 use Magento\Framework\App\DeploymentConfig;
+use Magento\Framework\App\Filesystem\DirectoryList;
 use Magento\Framework\App\Request\Http;
 use Magento\Framework\App\RequestFactory;
 use Magento\Framework\App\ResourceConnection;
@@ -129,7 +130,7 @@ public function testUploadAndImport()
             ->with('import.csv')->willReturn($fileReadMock);
         $this->filesystemMock->expects($this->once())
             ->method('getDirectoryWrite')
-            ->with('some/path/to/file')->willReturn($writeMock);
+            ->with(DirectoryList::VAR_IMPORT_EXPORT)->willReturn($writeMock);
 
         $this->resource->expects($this->once())->method('getConnection')->willReturn($connectionMock);