### Question:
Gas { public int compareTo(long other) { return Long.compare(value, other); } private  Gas(long value); static Gas valueOf(UInt256 value); static Gas valueOf(long value); static Gas valueOf(BigInteger value); Wei priceFor(Wei gasPrice); Gas add(Gas other); @Override boolean equals(Object o); @Override int hashCode(); @Override String toString(); long toLong(); Bytes toBytes(); Bytes toMinimalBytes(); int compareTo(long other);  }### Answer:
@Test void testCompareTo() { assertEquals(-1, (Gas.valueOf(1L)).compareTo(2L)); }