# Create a manual invoice whose value is smaller than any of the

        # credit notes we created

        invoice = self._manual_invoice(1)

        notes_new = commerce.CreditNote.unclaimed().filter(

            invoice__user=self.USER_1

        )

        # Item is True if the note was't consumed when generating invoice.

        note_was_unused = [(i in notes_old) for i in notes_new]

        self.assertIn(True, note_was_unused)

    def test_credit_notes_are_not_applied_if_user_has_multiple_invoices(self):

        # Have an invoice pending with no credit notes; no payment will be made

        invoice1 = self._invoice_containing_prod_1(1)

        # Create some credit notes.

        self._generate_multiple_credit_notes()

        invoice = self._manual_invoice(2)

        # Because there's already an invoice open for this user

        # The credit notes are not automatically applied.

        self.assertEqual(0, invoice.total_payments())

        self.assertTrue(invoice.invoice.is_unpaid)