public function testFilePermissions2()
 {
     $backend = new ezcConfigurationArrayWriter($this->tempDir . '/empty.php', new ezcConfiguration());
     $oldUmask = umask(0);
     $backend->setOptions(array('permissions' => 0640));
     $backend->save();
     umask($oldUmask);
     $stat = stat($this->tempDir . '/empty.php');
     $this->assertEquals(POSIX_S_IFREG | 0640, $stat['mode']);
 }