@Test
    public void shouldRemoveTraverser() {
        final TraverserSet<String> ts = makeStringTraversers();
        assertEquals(4, ts.size());
        assertEquals(5, ts.bulkSize());
        ts.remove();
        assertEquals(3, ts.size());
        assertEquals(3, ts.bulkSize());
    }
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/process/traversal/traverser/util/TraverserSetImplementationTest.java