Fix "Text file busy" error when call deleteDirectory (#48422)

Author: ycs77

src/Illuminate/Filesystem/Filesystem.php

@@ -749,6 +749,8 @@ public function deleteDirectory($directory, $preserve = false)
             }
         }
 
+        unset($items);
+
         if (! $preserve) {
             @rmdir($directory);
         }

tests/Integration/Filesystem/FilesystemTest.php

@@ -70,4 +70,17 @@ public function testItCanDeleteViaFilesystemRequiresManualClearStatCacheOnIsFile
         clearstatcache(true, $this->stubFile);
         $this->assertFalse(File::isFile($this->stubFile));
     }
+
+    public function testItCanDeleteDirectoryViaFilesystem()
+    {
+        if (! File::exists(storage_path('app/public/testdir'))) {
+            File::makeDirectory(storage_path('app/public/testdir'));
+        }
+
+        $this->assertTrue(File::exists(storage_path('app/public/testdir')));
+
+        File::deleteDirectory(storage_path('app/public/testdir'));
+
+        $this->assertFalse(File::exists(storage_path('app/public/testdir')));
+    }
 }

tests/Integration/Filesystem/StorageTest.php

@@ -79,4 +79,19 @@ public function testConditionable()
         Storage::disk('public')->assertMissing('StardewTaylor.png');
         $this->assertFalse(Storage::disk('public')->exists('StardewTaylor.png'));
     }
+
+    public function testItCanDeleteDirectoryViaStorage()
+    {
+        if (! Storage::disk('public')->exists('testdir')) {
+            Storage::disk('public')->makeDirectory('testdir');
+        }
+
+        Storage::disk('public')->assertExists('testdir');
+        $this->assertTrue(Storage::disk('public')->exists('testdir'));
+
+        Storage::disk('public')->deleteDirectory('testdir');
+
+        Storage::disk('public')->assertMissing('testdir');
+        $this->assertFalse(Storage::disk('public')->exists('testdir'));
+    }
 }