int initialBalance = accountManager.balance();
assertEquals("Unexpected initial balance", 0, initialBalance);
// credit
accountManager.credit(100);
AccountManager anotherAccountManagerInstance = (AccountManager) this.getInitialContext().lookup(
AccountManagerBean.JNDI_NAME);
int balanceAfterCredit = anotherAccountManagerInstance.balance();
assertEquals("Unexpected balance after credit", 100, balanceAfterCredit);