  @Test
  public void getGraphTransactions() throws Exception {

    GraphTransaction tx0 = new GraphTransaction(g0, Sets.newHashSet(v0, v1), Sets.newHashSet(e0));

    assertEquals(tx0,
      from(singletonList(g0), asList(v0, v1), singletonList(e0)).getGraphTransactions().collect().get(0));
  }