fix(ClassFileName): Avoid running ClassFileNameSniff on text files (#3074186 by eriksm)

coder_sniffer/Drupal/Sniffs/Classes/ClassFileNameSniff.php

@@ -57,17 +57,16 @@ class ClassFileNameSniff implements Sniff
             return ($phpcsFile->numTokens + 1);
         }
 
+        // If the file is not a php file, we do not care about how it looks,
+        // since we care about psr-4.
+        $extension = pathinfo($fullPath, PATHINFO_EXTENSION);
+        if ($extension !== 'php') {
+            return ($phpcsFile->numTokens + 1);
+        }
+
         $tokens  = $phpcsFile->getTokens();
         $decName = $phpcsFile->findNext(Tokens::$emptyTokens, ($stackPtr + 1), null, true);
 
-        // Subcontext classes for Behat Drupal Extension are located in
-        // *.behat.inc files and should be named ModuleNameSubContext.
-        $isSubContext = preg_match('/\.behat$/', $fileName);
-        if ($isSubContext === 1) {
-            $fileName = preg_replace('/\.behat$/', '', $fileName);
-            $fileName = str_replace('_', '', ucwords($fileName, '_')).'SubContext';
-        }
-
         if ($tokens[$decName]['code'] === T_STRING
             && $tokens[$decName]['content'] !== $fileName
         ) {

coder_sniffer/Drupal/Test/Classes/ClassFileNameUnitTest.php

@@ -27,6 +27,8 @@ class ClassFileNameUnitTest extends CoderSniffUnitTest
             return [];
         case 'class_fle_name_test.module':
             return [];
+        case 'markdownFile.md':
+            return [];
         }
 
     }//end getErrorList()
@@ -60,6 +62,7 @@ class ClassFileNameUnitTest extends CoderSniffUnitTest
             __DIR__.'/drupal8/ClassFileNameUnitTest.php',
             __DIR__.'/drupal8/drupal8.behat.inc',
             __DIR__.'/drupal7/class_fle_name_test.module',
+            __DIR__.'/drupal8/markdownFile.md',
         ];
 
     }//end getTestFiles()

coder_sniffer/Drupal/Test/Classes/drupal8/markdownFile.md

+this is not a php file
+
+```php
+<?php
+
+/**
+ * Class.
+ */
+class Test {
+}
+```