'Initialise variables and mock functions.'

def setUp(self):

    super(DeleteSnapshotTestCase, self).setUp()
    mock.patch.object(self.requester, 'snapshotDelete', self.perform_disco_request).start()
    self.response = self.FAKE_RESPONSE['standard']['success']
    self.snapshot = fake_snapshot.fake_snapshot_obj(self.ctx, **{'volume': self.volume})
