code: def test_typical(self):
      # 1) Typical function with two extra arguments:
      def myfunc(x, n, z):  # Bessel function integrand
          return cos(n * x - z * sin(x)) / pi
  
      assert_quad(quad(myfunc, 0, pi, (2, 1.8)), 0.30614353532540296487)
  
imports: import sys
  import math
  import numpy
  from numpy import sqrt, cos, sin, arctan, exp, log, pi
  from numpy.testing import assert_, assert_allclose, assert_array_less, assert_almost_equal
  import pytest
  from scipy.integrate import quad, dblquad, tplquad, nquad
  from scipy.special import erf, erfc
  from scipy._lib._ccallback import LowLevelCallable
  import ctypes
  import ctypes.util
  from scipy._lib._ccallback_c import sine_ctypes
  import scipy.integrate._test_multivariate
label_desc: Use image node_id 1 for calling the TestQuad obj's underlying member method code with example usage: obj.test_typical() and returns: unknown