'``/VolumeDriver.Unmount`` returns a successful result.'

def test_unmount(self):

    unmount_id = ''.join((random.choice('0123456789abcdef') for n in xrange(64)))
    return self.assertResult('POST', '/VolumeDriver.Unmount', {u'Name': u'vol', u'ID': unicode(unmount_id)}, OK, {u'Err': u''})
