Concept extends PartiallyOrdered<Concept> { @Override public double measure() { return extent.cardinality(); } Concept(final MutableBitSet extent, final MutableBitSet intent); MutableBitSet extent(); MutableBitSet intent(); @Override boolean apply(final Concept that); @Override boolean isLessThan(final Concept that); @Override boolean isLessOrEqualTo(final Concept that); @Override boolean isGreaterThan(final Concept that); @Override boolean isGreaterOrEqualTo(final Concept that); @Override boolean equals(final Object that); @Override int hashCode(); @Override String toString(); @Override Concept intersect(final Concept that); @Override Concept union(final Concept that); @Override double measure();  }
@Test public void testMeasure() { assertEquals(1.0, S.measure(), 0.0); }