Failing tests fixed

Author: rogyar

app/code/Magento/Sales/Test/Unit/Controller/Adminhtml/Order/Creditmemo/PrintActionTest.php

@@ -155,7 +155,8 @@ public function testExecute()
         $creditmemoId = 2;
         $date = '2015-01-19_13-03-45';
         $fileName = 'creditmemo2015-01-19_13-03-45.pdf';
-        $fileContents = 'pdf0123456789';
+        $pdfContent = 'pdf0123456789';
+        $fileData = ['type' => 'string', 'value' => $pdfContent, 'rm' => true];
         $this->prepareTestExecute($creditmemoId);
 
         $this->objectManagerMock->expects($this->any())
@@ -184,12 +185,12 @@ public function testExecute()
             ->willReturn($date);
         $this->pdfMock->expects($this->once())
             ->method('render')
-            ->willReturn($fileContents);
+            ->willReturn($pdfContent);
         $this->fileFactoryMock->expects($this->once())
             ->method('create')
             ->with(
                 $fileName,
-                $fileContents,
+                $fileData,
                 \Magento\Framework\App\Filesystem\DirectoryList::VAR_DIR,
                 'application/pdf'
             )

dev/tests/integration/testsuite/Magento/Framework/App/Filesystem/CreatePdfFileTest.php

@@ -6,7 +6,7 @@
  */
 declare(strict_types=1);
 
-namespace Magento\Framework\App\Filesystem\Images;
+namespace Magento\Framework\App\Filesystem;
 
 use Magento\Framework\App\Filesystem\DirectoryList;
 use Magento\Framework\App\Response\Http\FileFactory;

lib/internal/Magento/Framework/App/Response/Http/FileFactory.php

@@ -109,9 +109,9 @@ public function create(
      * Returns file content for writing.
      *
      * @param string|array $content
-     * @return string
+     * @return string|array
      */
-    private function getFileContent($content): string
+    private function getFileContent($content)
     {
         if (isset($content['type']) && $content['type'] === 'string') {
             return $content['value'];