def METHOD_NAME(self):
    recurring_next_date = to_date("2020-02-15")
    self.assertAlmostEqual(self.contract_line.price_subtotal, 50.0)
    self.contract_line.price_unit = 100.0
    self.contract.partner_id = self.partner.id
    self.contract.recurring_create_sale()
    self.sale_monthly = self.contract._get_related_sales()
    self.assertTrue(self.sale_monthly)
    self.assertEqual(self.contract_line.recurring_next_date, recurring_next_date)
    self.order_line = self.sale_monthly.order_line[0]
    self.assertTrue(self.order_line.tax_id)
    self.assertAlmostEqual(self.order_line.price_subtotal, 50.0)
    self.assertEqual(self.contract.user_id, self.sale_monthly.user_id)