def test_init_matrix(self): ''' Tests the init_matrix method of the Calculator class. ''' matrix = Calculator.init_matrix(3, 1) self.assertEqual(1, matrix[0][0]) self.assertEqual(1, matrix[0][1]) self.assertEqual(1, matrix[0][2]) self.assertEqual(1, matrix[1][0]) self.assertEqual(1, matrix[1][1]) self.assertEqual(1, matrix[1][2]) self.assertEqual(1, matrix[2][0]) self.assertEqual(1, matrix[2][1]) self.assertEqual(1, matrix[2][2])