第35章 Seam アプリケーションのテスト

@Stateless
@Scope(EVENT)
@Name("statementOfAccount")
public class StatementOfAccount {
   
  @In(create=true) EntityManager entityManager
   
  private double statementTotal;
   
  @In
  private Customer customer;
   
  @Create
  public void create() {
    List<Invoice> invoices = entityManager
      .createQuery("select invoice from Invoice invoice where " + 
                   "invoice.customer = :customer")
      .setParameter("customer", customer)
      .getResultList();
    statementTotal = calculateTotal(invoices);
  }
   
  public double calculateTotal(List<Invoice> invoices) {
    double total = 0.0;
      for (Invoice invoice: invoices) {
        double += invoice.getTotal();
      }
      return total;
     }
   // getter and setter for statementTotal
}

public class StatementOfAccountTest { 
  @Test 
  public testCalculateTotal { 
    List<Invoice> invoices = 
      generateTestInvoices(); // A test data generator 
    double statementTotal = 
      new StatementOfAccount().calculateTotal(invoices); 
    assert statementTotal = 123.45; 
  }   
}