<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>
        <assert model="account.move" search="[]" string="For all Journal Items, the state is valid implies that the sum of credits equals the sum of debits">
            <test expr="not len(line_id) or line_id[0].state != 'valid' or (sum([l.debit - l.credit for l in line_id]) &lt;= 0.00001)"/>
        </assert>
    </data>
</openerp>
