// Query for single assets
  @Test
  public void testQuerySingleAsset() throws Exception {

    Oid memberId = Oid.fromToken("Member:20", metaModel);
    Query query = new Query(memberId);
    IAttributeDefinition nameAttribute = metaModel.getAttributeDefinition("Member.Username");
    query.getSelection().add(nameAttribute);
    QueryResult result = services.retrieve(query);

    Assert.assertNotNull(result.getAssets());

    Assert.assertEquals("1 asset", 1, result.getAssets().length);
  }