ENGCOM-8130: AppState emulateAreaCode was not respected by file collector #28917

 - Merge Pull Request #28917 from johan-lindahl/magento2:bugfix-emulate-area-code
 - Merged commits:
   1. 0ec2c91
   2. f35a8b6
   3. e724788
   4. 27767f1

Author: magento-engcom-team

lib/internal/Magento/Framework/View/File/Collector/Base.php

@@ -65,7 +65,7 @@ public function getFiles(ThemeInterface $theme, $filePath)
         foreach ($sharedFiles as $file) {
             $result[] = $this->fileFactory->create($file->getFullPath(), $file->getComponentName(), null, true);
         }
-        $area = $theme->getData('area');
+        $area = $theme->getArea();
         $themeFiles = $this->componentDirSearch->collectFilesWithContext(
             ComponentRegistrar::MODULE,
             "view/{$area}/{$this->subDir}{$filePath}"

lib/internal/Magento/Framework/View/Test/Unit/File/Collector/BaseTest.php

@@ -85,8 +85,7 @@ public function testGetFiles()
             ->method('create')
             ->willReturn($this->createFileMock());
         $this->themeMock->expects($this->once())
-            ->method('getData')
-            ->with('area')
+            ->method('getArea')
             ->willReturn('frontend');
 
         $result = $this->fileCollector->getFiles($this->themeMock, '*.xml');