code: def testCubicSplineBc1(self):
      expected = readVector(
          join(filedir(), "spline/cubicSpline_bc1.txt")
      )
      self.evaluateCubicSpline(expected, 1)
  
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 7 for calling the TestCubicSpline obj's underlying member method code with example usage: obj.testCubicSplineBc1() without return types