Substitution sub = new Substitution();
sub = sub.addSub(new SpecVar("a"), labels[0]);
RelationshipDelta delta = env.getInferredDelta(find, sub);
assertNotNull(delta);
SevenPointLattice val = delta.getValue(new Relationship(relations[1], new ObjectLabel[] {labels[0], labels[0]}));
assertEquals(SevenPointLattice.TRU, val);
assertEquals(1, delta.numberOfChanges());
}