public void test1() throws FrontendException {
LogicalPlanTester lpt = new LogicalPlanTester( pc );
lpt.buildPlan( "A = LOAD 'file.txt' AS (a(u,v), b, c);" );
lpt.buildPlan( "B = FOREACH A GENERATE $0, b;" );
lpt.buildPlan( "C = FILTER B BY " + Identity.class.getName() +"($0, $1) > 5;" );
org.apache.pig.impl.logicalLayer.LogicalPlan plan = lpt.buildPlan( "STORE C INTO 'empty';" );
LogicalPlan newLogicalPlan = migrateAndOptimizePlan( plan );
Operator load = newLogicalPlan.getSources().get( 0 );
Assert.assertTrue( load instanceof LOLoad );
Operator fe1 = newLogicalPlan.getSuccessors( load ).get( 0 );