'L{IMAP4Client.addFlags} with a C{True} value for C{silent} behaves like
L{IMAP4Client.setFlags} with a C{True} value for C{silent}, but it
sends I{+FLAGS.SILENT} instead of I{FLAGS.SILENT}.'

def test_addFlagsSilently(self):

    self._flagsSilentlyTest('addFlags', '+FLAGS.SILENT')
