code: def test_general(self):
      x = np.array([-1, 0, 0.5, 2, 4, 4.5, 5.5, 9])
      y = np.array([0, -0.5, 2, 3, 2.5, 1, 1, 0.5])
      for n in [2, 3, x.size]:
          self.check_all_bc(x[:n], y[:n], 0)
  
          Y = np.empty((2, n, 2))
          Y[0, :, 0] = y[:n]
          Y[0, :, 1] = y[:n] - 1
          Y[1, :, 0] = y[:n] + 2
          Y[1, :, 1] = y[:n] + 3
          self.check_all_bc(x[:n], Y, 1)
  
imports: import warnings
  import io
  import numpy
  from numpy.testing import assert_almost_equal, assert_array_equal, assert_array_almost_equal, assert_allclose, assert_equal, assert_
  from pytest import raises
  from scipy.interpolate import KroghInterpolator, krogh_interpolate, BarycentricInterpolator, barycentric_interpolate, approximate_taylor_polynomial, CubicHermiteSpline, pchip, PchipInterpolator, pchip_interpolate, Akima1DInterpolator, CubicSpline, make_interp_spline
label_desc: Use image node_id 3 for calling the TestCubicSpline obj's underlying member method code with example usage: obj.test_general() without return types