def METHOD_NAME(self):
    error, u = main(nrefine=2, etype='mixed', degree=1)
    with self.subTest('degrees of freedom'):
        self.assertEqual(len(u), 34)
    with self.subTest('L2-error'):
        self.assertAlmostEqual(error[0], 0.00450, places=5)
    with self.subTest('H1-error'):
        self.assertAlmostEqual(error[1], 0.11692, places=5)
    with self.subTest('left-hand side'):
        self.assertAlmostEqual64(u, '''
            eNprMT1u6mQyxUTRzMCUAQhazL6b3jNrMYPxp5iA5FtMD+lcMgDxHa4aXzS+6HDV+fKO85cMnC8zMBzS
            AQDBThbY''')