campanhas_email/wizard/test_mailing.xml

<?xml version="1.0"?>
<openerp>
    <data>

        <record model="ir.ui.view" id="view_mail_mass_mailing_test_form">
            <field name="name">mail.mass_mailing.test.form</field>
            <field name="model">mail.mass_mailing.test</field>
            <field name="arch" type="xml">
                <form string="Send a Sample Mail">
                    <p class="text-muted">
                        Send a sample of this mailing to the above of email addresses for test purpose.
                    </p>
                    <group>
                        <field name="email_to"/>
                    </group>
                    <footer>
                        <button string="Send Sample Mail" name="send_mail_test" type="object" class="oe_highlight"/>
                        or
                        <button string="Cancel" class="oe_link" special="cancel" />
                    </footer>
                </form>
            </field>
        </record>

        <record id="action_mail_mass_mailing_test" model="ir.actions.act_window">
            <field name="name">Mailing Test</field>
            <field name="res_model">mail.mass_mailing.test</field>
            <field name="view_type">form</field>
            <field name="view_mode">form</field>
            <field name="target">new</field>
        </record>

    </data>
</openerp>