### Question:
AndPredicate implements StreamPredicate, CompoundPredicate { @Override public boolean apply(Collection<Attribute> attributes) { for (StreamPredicate predicate : predicates) { if (!predicate.apply(attributes)){ return false; } } return true; } AndPredicate();  AndPredicate(StreamPredicate... predicates); @Override StreamPredicate[] getPredicates(); @Override void setPredicates(StreamPredicate[] predicates); @Override boolean apply(Collection<Attribute> attributes);  }### Answer:
@Test public void testApplyPredicates(){ StreamPredicate[] predicates = new StreamPredicate[0]; AndPredicate andPredicate = new AndPredicate(predicates); Collection<Attribute> attributes = Collections.emptyList(); assertTrue(andPredicate.apply(attributes)); }
@Test public void testApplyToNullPredicates(){ StreamPredicate[] predicates = new StreamPredicate[1]; predicates[0] = new EqualToPredicate(); AndPredicate andPredicate = new AndPredicate(predicates); Collection<Attribute> attributes = Collections.emptyList(); assertFalse(andPredicate.apply(attributes)); }