VectorView extends AbstractVector { @Override public int getNumNondefaultElements() { return size(); } VectorView();  VectorView(Vector vector, int offset, int cardinality); @Override Vector clone(); @Override boolean isDense(); @Override boolean isSequentialAccess(); @Override VectorView like(); @Override double getQuick(int index); @Override void setQuick(int index, double value); @Override int getNumNondefaultElements(); @Override Vector viewPart(int offset, int length); @Override Iterator<Element> iterateNonZero(); @Override Iterator<Element> iterator(); @Override double getLengthSquared(); @Override double getDistanceSquared(Vector v); @Override double getLookupCost(); @Override double getIteratorAdvanceCost(); @Override boolean isAddConstantTime(); @Override void mergeUpdates(OrderedIntDoubleMapping updates);  }
@Test public void testSize() throws Exception { assertEquals("size", 3, test.getNumNondefaultElements()); }