### Question:
XmiMapping implements Comparable<XmiMapping> { @Override public int compareTo(final XmiMapping other) { return 0; } XmiMapping(final XmiFeature lhs, final XmiFeature rhs, final XmiMappingStatus status, final String tracking, final String comment); @Override int compareTo(final XmiMapping other); @Override boolean equals(Object o); @Override int hashCode(); XmiFeature getLhsFeature(); XmiFeature getRhsFeature(); XmiMappingStatus getStatus(); String getComment(); String getTracking(); @Override String toString();  }### Answer:
@Test public void testCompareTo() { Assert.assertTrue(XMI_MAPPING.compareTo(null) == 0); Assert.assertTrue(XMI_MAPPING.compareTo(XMI_MAPPING) == 0); }