* bounds an empty intersection is identified
*/
@Test
public void intersectionEmpty() {
for( LineType t : LineType.values() ) {
final OWLRealInterval a = interval( null, 0, false, true, t );
final OWLRealInterval b = interval( 1, null, true, false, t );
assertNull( a.intersection( b ) );
assertNull( b.intersection( a ) );
assertEquals( IntervalRelations.PRECEDES, a.compare( b ) );
assertEquals( IntervalRelations.PRECEDED_BY, b.compare( a ) );
}
}