join2.setSuccessors(Lists.newArrayList("file://" + System.getProperty("user.dir") + "/test_out_join"));
expectedOps.addAll(Lists.newArrayList(join1, join2));
// Add all expected P2jLOFilter objects
P2jLOFilter filter1 = new P2jLOFilter();
filter1.setAlias("colors_filtered");
filter1.setPredecessors(Lists.newArrayList("colors"));
expectedOps.add(filter1);
// Add all expected P2jLOCogroup objects
P2jLOCogroup cogroup1 = new P2jLOCogroup();