Testing of JPA queries with @UsingDataSet and @ShouldMatchDataSet

@Test
@UsingDataSet("all.xls")
@ShouldMatchDataSet("hits.xls")
public List<Customer> getAllowedCustomers() {
  return em.createNamedQuery("customers", Customer.class).getResultList();
}

    @Test
    @UsingDataSet("all.xls")
    public void testCustomers() throws Exception
    {
	IDataSet expected = new XlsDataSet(getClass().getResourceAsStream("/hits.xls"));
	ITableMetaData metadata = expected.getTableMetaData(expected.getTableNames()[0]);
	IDataSet real = new PojoDataSet(em.createNamedQuery("customers", Customer.class).getResultList(), metadata);
	Assertion.assertEquals(expected, real);
    }

public class PojoDataSet extends DefaultDataSet
{

    public PojoDataSet(List<?> entities, ITableMetaData metaData)
    {
	try
	{
	    DefaultTable table = new DefaultTable(metaData);
	    for (Object entity : entities)
	    {
		List<Object> values = new ArrayList<Object>();
		for (Column column : metaData.getColumns())
		{
		    values.add(BeanUtils.getNestedProperty(entity, column.getColumnName()));
		}
		table.addRow(values.toArray());
	    }
	    addTable(table);
	} catch (Exception e)
	{
	    throw new IllegalArgumentException(e);
	}
    }

}