### Question:
IntegerUuid { @Override public String toString() { return Hexa.toHex(uuid); } IntegerUuid();  IntegerUuid(final byte[] bytes);  IntegerUuid(final int value);  IntegerUuid(final String idsource); @Override String toString(); byte[] getBytes(); long getTimestamp(); @Override boolean equals(final Object o); @Override int hashCode(); int getInt();  }### Answer:
@Test public void testStructure() { IntegerUuid id = new IntegerUuid(); String str = id.toString(); assertEquals(8, str.length()); }