code: @Test public void testAddAndRemoveSameName() throws Exception {
    final String dsName="SameNameDs";
    final ModelNode address=new ModelNode();
    address.add("subsystem","datasources");
    address.add("data-source",dsName);
    address.protect();
    final ModelNode operation=new ModelNode();
    operation.get(OP).set("add");
    operation.get(OP_ADDR).set(address);
    operation.get("name").set(dsName);
    operation.get("jndi-name").set("java:jboss/datasources/" + dsName);
    operation.get("enabled").set(false);
    operation.get("driver-name").set("h2");
    operation.get("pool-name").set(dsName + "_Pool");
    operation.get("connection-url").set("jdbc:h2:mem:test;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE");
    operation.get("user-name").set("sa");
    operation.get("password").set("sa");
    for (int i=1; i <= 2; i++) {
      executeOperation(operation);
      remove(address);
    }
  }
  