LogicalRelationalOperator fil = (LogicalRelationalOperator)
newLogicalPlan.getSuccessors( newLogicalPlan.getSources().get(0) ).get(0);
assertEquals( LOFilter.class,
fil.getClass() );
LOFilter filter = (LOFilter)fil;
LogicalExpressionPlan filPlan = filter.getFilterPlan();
assertEquals( 1, filPlan.getSources().size() );
assertEquals( 3, filPlan.size() );
assertEquals( 1, filPlan.getSinks().size() );
assertEquals( NotExpression.class, filPlan.getSources().get(0).getClass() );