test: fix index file

Author: ph1p

src/__tests__/list-folder.test.ts

@@ -25,7 +25,7 @@ describe('test file-structure', () => {
       { ext: '.js', folder: 'src/', isDir: false, name: 'file1', path: 'src/file1.js' },
       { ext: '.ts', folder: 'src/', isDir: false, name: 'file2', path: 'src/file2.ts' },
       { ext: '.vue', folder: 'src/lib/', isDir: false, name: 'file3', path: 'src/lib/file3.vue' },
-      { ext: '.js', folder: 'src/lib/index', isDir: false, name: '_index', path: 'src/lib/index.js' },
+      { ext: '.js', folder: 'src/lib/', isDir: false, name: '__index__', path: 'src/lib/index.js' },
       { isDir: true, name: 'lib', path: 'src/lib' }
     ]);
 
@@ -35,7 +35,7 @@ describe('test file-structure', () => {
       {
         children: [
           { fullPath: 'src/lib/file3', name: 'file3', path: '/file3', ext: '.vue' },
-          { fullPath: 'src/lib/_index', name: '_index', path: '/_index', ext: '.js' }
+          { fullPath: 'src/lib/__index__', name: '__index__', path: '/__index__', ext: '.js' }
         ],
         name: 'lib'
       }