Assert.assertEquals(2, projects.length);
Assert.assertEquals(1, projects[0].getSelections().length);
Assert.assertEquals(Filter.class, projects[0].getInput().getClass());
Assert.assertEquals(2, projects[1].getSelections().length);
Assert.assertEquals(Project.class, projects[1].getInput().getClass());
Store store = findOnlyOperator(plan, Store.class);
Assert.assertEquals("queue", store.getStorageEngine());
Assert.assertEquals("output sink", store.getMemo());
Assert.assertEquals(Project.class, store.getInput().getClass());
}