@LoadGraphWith(MODERN)
    public void g_V_out_asXcX_matchXb_knows_a__c_created_eX_selectXcX() throws Exception {
        final Traversal<Vertex, String> traversal = get_g_V_out_asXcX_matchXb_knows_a__c_created_eX_selectXcX();
        try {
            printTraversalForm(traversal);
            traversal.iterate();
            fail("Should have tossed an exception because match pattern is not solvable");
        } catch (Exception ex) {
            //final Throwable root = ExceptionUtils.getRootCause(ex);
            //assertThat(root.getMessage(), startsWith("The provided match pattern is unsolvable:"));
        }
    }
@author Joshua Shinavier (http://fortytwo.net)
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/MatchTest.java