Issue #3487753 by chandansha, lavanyatalwar: Support file names with "0" (zero) like foo.0.zip

sophron_guesser/src/SophronMimeTypeGuesser.php

@@ -39,7 +39,9 @@ class SophronMimeTypeGuesser implements MimeTypeGuesserInterface {
     // then iterate over the file parts, trying to find a match.
     // For 'my.awesome.image.jpeg', we try: 'awesome.image.jpeg', then
     // 'image.jpeg', then 'jpeg'.
-    while (array_shift($file_parts)) {
+    // We explicitly check for NULL because that indicates that the array is
+    // empty.
+    while (array_shift($file_parts) !== NULL) {
       $extension = strtolower(implode('.', $file_parts));
       $mime_map_extension = $this->mimeMapManager->getExtension($extension);
       try {

tests/src/Kernel/SophronGuesserTest.php

@@ -96,6 +96,8 @@ class SophronGuesserTest extends KernelTestBase {
       'foo.file_test_2' => 'application/octet-stream',
       'foo.doc' => 'application/msword',
       'test.ogg' => 'audio/ogg',
+      'foobar.0.zip' => 'application/zip',
+      'foobar..zip' => 'application/zip',
     ];
 
     $guesser = $this->container->get('file.mime_type.guesser');