@Test
    public void shouldCorrectlyIdentifyStepIds() {
        testEachTraversal(__.out().in().groupCount().unfold().select("a").asAdmin());
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/process/traversal/util/StepPositionTest.java