code: def testCubicSplineBc0(self):
      expected = readVector(
          join(filedir(), "spline/cubicSpline_bc0.txt")
      )
      self.evaluateCubicSpline(expected, 0)
  
file_path: essentia/test/src/unittests/standard/test_cubicspline.py
imports: from essentia_test import *
  from essentia.standard import *
  from numpy import r_, sin, pi
label_desc: Use image node_id 6 for calling the TestCubicSpline obj's underlying member method code with example usage: obj.testCubicSplineBc0() without return types