public void testCollisionsDueToIncorrectSignExtension() {
    byte[] col1 = new byte[] {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, (byte) 0x80};
    byte[] col2 = new byte[] {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, (byte) 0x81};
    byte[] col3 = new byte[] {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, (byte) 0xff};

    ImmutableSet<HashCode> hashCodes =
        ImmutableSet.of(
            SIP_WITH_KEY.hashBytes(col1),

  public void testCollisionsDueToIncorrectSignExtension() {
    byte[] col1 = new byte[] {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, (byte) 0x80};
    byte[] col2 = new byte[] {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, (byte) 0x81};
    byte[] col3 = new byte[] {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, (byte) 0xff};

    ImmutableSet<HashCode> hashCodes =
        ImmutableSet.of(
            SIP_WITH_KEY.hashBytes(col1),

  }

  // Tests from RFC2022: https://tools.ietf.org/html/rfc2202

  public void testRfc2202_hmacSha1_case1() {
    byte[] key = fillByteArray(20, 0x0b);
    String data = "Hi There";

    checkSha1("b617318655057264e28bc0b6fb378c8ef146be00", key, data);
  }

  public void testRfc2202_hmacSha1_case2() {
    byte[] key = "Jefe".getBytes(UTF_8);

	if err != nil {
		return
	}
	err = en.WriteBool(z.Group)
	if err != nil {
		err = msgp.WrapError(err, "Group")
		return
	}
	// write "Owner"
	err = en.Append(0xa5, 0x4f, 0x77, 0x6e, 0x65, 0x72)
	if err != nil {
		return
	}
	err = en.WriteString(z.Owner)
	if err != nil {
		err = msgp.WrapError(err, "Owner")
		return
	}
	// write "Quorum"

                    (byte) 0x01, // up to here, same bytes as above
                (byte) 0x01, (byte) 0x02, (byte) 0x03, (byte) 0x04,
                (byte) 0x05, (byte) 0x06, (byte) 0x07, (byte) 0x08
              },
              0x89abcdef,
              0x0123456789abcdefL, // asInt/asLong as above, due to equal eight first bytes
              "efcdab89674523010102030405060708"),

                    (byte) 0x01, // up to here, same bytes as above
                (byte) 0x01, (byte) 0x02, (byte) 0x03, (byte) 0x04,
                (byte) 0x05, (byte) 0x06, (byte) 0x07, (byte) 0x08
              },
              0x89abcdef,
              0x0123456789abcdefL, // asInt/asLong as above, due to equal eight first bytes
              "efcdab89674523010102030405060708"),

		return
	}
	err = en.WriteString(z.Creds.SessionToken)
	if err != nil {
		err = msgp.WrapError(err, "Creds", "SessionToken")
		return
	}
	// write "Snowball"
	err = en.Append(0xa8, 0x53, 0x6e, 0x6f, 0x77, 0x62, 0x61, 0x6c, 0x6c)
	if err != nil {
		return
	}
	err = z.Snowball.EncodeMsg(en)
	if err != nil {
		err = msgp.WrapError(err, "Snowball")
		return
	}
	return
}

		return
	}
	err = en.WriteBytes(z.ReplicationConfigXML)
	if err != nil {
		err = msgp.WrapError(err, "ReplicationConfigXML")
		return
	}
	// write "BucketTargetsConfigJSON"
	err = en.Append(0xb7, 0x42, 0x75, 0x63, 0x6b, 0x65, 0x74, 0x54, 0x61, 0x72, 0x67, 0x65, 0x74, 0x73, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x4a, 0x53, 0x4f, 0x4e)
	if err != nil {
		return
	}
	err = en.WriteBytes(z.BucketTargetsConfigJSON)