public function lockSiteOrExitUpdatesLockFlagFileLastModifiedTimestampIfItExists()
{
$oldLastModifiedTimestamp = time() - 100;
$this->mockLockFlagFile->lastModified($oldLastModifiedTimestamp);
$this->lockManager->lockSiteOrExit();
$this->assertNotEquals($oldLastModifiedTimestamp, $this->mockLockFlagFile->filemtime());
}