### Question:
Ed25519EncodedFieldElement implements Serializable { @Override public String toString() { return ConvertUtils.toHex(this.values); } Ed25519EncodedFieldElement(final byte[] values); byte[] getRaw(); boolean isNegative(); boolean isNonZero(); Ed25519FieldElement decode(); Ed25519EncodedFieldElement modQ(); Ed25519EncodedFieldElement multiplyAndAddModQ(
      final Ed25519EncodedFieldElement b, final Ed25519EncodedFieldElement c); @Override int hashCode(); @Override boolean equals(final Object obj); @Override String toString();  }### Answer:
@Test public void toStringReturnsCorrectRepresentation() { final byte[] bytes = new byte[32]; for (int i = 0; i < 32; i++) { bytes[i] = (byte) (i + 1); } final Ed25519EncodedFieldElement encoded = new Ed25519EncodedFieldElement(bytes); final String encodedAsString = encoded.toString(); final StringBuilder builder = new StringBuilder(); for (final byte b : bytes) { builder.append(String.format("%02X", b)); } MatcherAssert.assertThat(encodedAsString, IsEqual.equalTo(builder.toString())); }