private static HybridTestVector createTestVector0() throws GeneralSecurityException {
    HpkeParameters params =
        HpkeParameters.builder()
            .setVariant(HpkeParameters.Variant.NO_PREFIX)
            .setKemId(HpkeParameters.KemId.DHKEM_P256_HKDF_SHA256)
            .setKdfId(HpkeParameters.KdfId.HKDF_SHA256)
            .setAeadId(HpkeParameters.AeadId.AES_128_GCM)
            .build();
    HpkePublicKey publicKey =
        HpkePublicKey.create(params, getP256PublicPointAsBytes(), /* idRequirement= */ null);

    HpkePrivateKey privateKey = HpkePrivateKey.create(publicKey, getPrivateP256Value());

    return new HybridTestVector(
        privateKey,
        new byte[] {0x01},
        new byte[] {0x02},
        Hex.decode(
            "04d7d800cab3d3c0104899e137656a3a23a58e1efe41310ea5e9ba74234494b10da4286d4baf4641c38d50"
                + "9d28cb21c4694461ccd6258864c115cf17875f59b069dffc8427cfb7f277ed4e370ae78f916e"
                + "22"));
  }
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