private static Bytes getP256PublicPointAsBytes() throws GeneralSecurityException {
    return Bytes.copyFrom(
        EllipticCurves.pointEncode(
            CurveType.NIST_P256,
            PointFormatType.UNCOMPRESSED,
            new ECPoint(
                new BigInteger(
                    "60FED4BA255A9D31C961EB74C6356D68C049B8923B61FA6CE669622E60F29FB6", 16),
                new BigInteger(
                    "7903FE1008B8BC99A41AE9E95628BC64F2F1B20C2D7E9F5177A3C294D4462299", 16))));
  }
Test vectors for HPKE. Generated by hand from the implementation here.
java_src/src/main/java/com/google/crypto/tink/hybrid/internal/testing/HpkeTestUtil.java