':py:obj:`Connection.bio_read` raises :py:obj:`OpenSSL.SSL.WantReadError`
if there are no bytes available to be read from the BIO.'

def test_wantReadError(self):

    ctx = Context(TLSv1_METHOD)
    conn = Connection(ctx, None)
    self.assertRaises(WantReadError, conn.bio_read, 1024)
