function testGetTransformed_NoColumns() {
  var relation = lf.proc.Relation.fromRows(sampleJobs, [j.getName()]);
  var transformer = new lf.proc.RelationTransformer(relation, []);
  var transformedRelation = transformer.getTransformed();
  transformedRelation.entries.forEach(
      function(entry) {
        assertTrue(goog.object.isEmpty(entry.row.payload()));
      });
}
Tests the case where no columns are requested.