new_contents: """
      Tests for the NURBS-Python package
      Released under The MIT License. See LICENSE file for details.
      Copyright (c) 2018 Onur Rauf Bingol
  
      Tests geomdl.helpers module.
  """
  
  from geomdl import helpers
  
  GEOMDL_DELTA = 10e-8
  
  def test_basis_function_one():
  	degree = 2
  	knot_vector = [0, 0, 0, 1, 2, 3, 4, 4, 5, 5, 5]
  	knot = 5. / 2.
  	span = 3
  
  	to_check = helpers.basis_function_one(degree, knot_vector, span, knot)
  	result = 0.75
  
  	assert to_check == result
  
  def test_basis_function_ders_one():
  	degree = 2
  	knot_vector = [0, 0, 0, 1, 2, 3, 4, 4, 5, 5, 5]
  	knot = 5. / 2.
  	span = 4
  
  	to_check = helpers.basis_function_ders_one(degree, knot_vector, 4, knot, 2)
  	result = [0.125, 0.5, 1.0]
  
  	assert to_check == result
  
subject: Add tests for A2.4 and A2.5