'L{IMAP4Client.fetchSpecific} issues a I{BODY.PEEK[]} command if passed
C{True} for the C{peek} parameter.'

def test_fetchSpecificPeek(self):

    d = self.client.fetchSpecific('6', peek=True)
    self.assertEqual(self.transport.value(), '0001    FETCH    6    BODY.PEEK[]\r\n')
    self.client.lineReceived('*    6    FETCH    (BODY[]    "Some    body")')
    self.client.lineReceived('0001    OK    FETCH    completed')
    self.assertEqual(self._extractDeferredResult(d), {6: [['BODY', [], 'Some    body']]})
