Workaround for empty dir deletion for SFTP

Explicitly clear the stat cache after deleting an empty folder to make
sure it is properly detected as deleted in subsequent requests.

This works around a problem with phpseclib where the folder is properly
deleted remotely but the stat cache was not updated.

1 files changed, 7 insertions, 0 deletions

diff --git a/tests/lib/files/storage/storage.php b/tests/lib/files/storage/storage.php
index 2355009c9bf..fcd7f73dcde 100644
--- a/tests/lib/files/storage/storage.php
+++ b/tests/lib/files/storage/storage.php
@@ -380,6 +380,13 @@ abstract class Storage extends \Test\TestCase {
 		$this->assertFalse($this->instance->file_exists('folder'));
 	}
 
+	public function testRmdirEmptyFolder() {
+		$this->assertTrue($this->instance->mkdir('empty'));
+		$this->wait();
+		$this->assertTrue($this->instance->rmdir('empty'));
+		$this->assertFalse($this->instance->file_exists('empty'));
+	}
+
 	public function testRecursiveUnlink() {
 		$this->instance->mkdir('folder');
 		$this->instance->mkdir('folder/bar');