### Question:
Ed25519FieldElement implements Serializable { @Override public String toString() { return this.encode().toString(); } Ed25519FieldElement(final int[] values); static Ed25519FieldElement sqrt(final Ed25519FieldElement u, final Ed25519FieldElement v); int[] getRaw(); boolean isNonZero(); Ed25519FieldElement add(final Ed25519FieldElement g); Ed25519FieldElement subtract(final Ed25519FieldElement g); Ed25519FieldElement negate(); Ed25519FieldElement multiply(final Ed25519FieldElement g); Ed25519FieldElement square(); Ed25519FieldElement squareAndDouble(); Ed25519FieldElement invert(); Ed25519EncodedFieldElement encode(); boolean isNegative(); @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 Ed25519FieldElement f = new Ed25519EncodedFieldElement(bytes).decode(); final String fAsString = f.toString(); final StringBuilder builder = new StringBuilder(); for (final byte b : bytes) { builder.append(String.format("%02X", b)); } MatcherAssert.assertThat(fAsString, IsEqual.equalTo(builder.toString())); }