public void intersectionStarts2() {
final ContinuousRealInterval a = interval( 2.1, 3.1, false, true );
final ContinuousRealInterval b = interval( 2.1, null, false, false );
assertEquals( a, a.intersection( b ) );
assertEquals( a, b.intersection( a ) );
assertEquals( IntervalRelations.STARTS, a.compare( b ) );
assertEquals( IntervalRelations.STARTED_BY, b.compare( a ) );
}