old_contents: import unittest
  import numpy as np
  from math import cos, sin
  from pymicro.crystal.microstructure import Orientation
  
  
  class LatticeTests(unittest.TestCase):
  
      def setUp(self):
          print('testing the Quaternion class')
          self.euler_deg = [343.580, 128.653, 290.986]
  
      def test_Euler2Quaternion(self):
          euler_rad = np.radians(self.euler_deg)
          # compute quaternion using the passive convention
          q = Orientation.Euler2Quaternion(self.euler_deg, P=-1)
  
          euler = 0.5 * euler_rad
          c1 = cos(euler[0])
          s1 = sin(euler[0])
          c2 = cos(euler[1])
          s2 = sin(euler[1])
          c3 = cos(euler[2])
          s3 = sin(euler[2])
          q0 = c1 * c2 * c3 - s1 * c2 * s3
          q1 = c1 * s2 * c3 + s1 * s2 * s3
          q2 = -c1 * s2 * s3 + s1 * s2 * c3
          q3 = c1 * c2 * s3 + s1 * c2 * c3
          self.assertAlmostEqual(q.q0, q0)
          self.assertAlmostEqual(q.q1, q1)
          self.assertAlmostEqual(q.q2, q2)
          self.assertAlmostEqual(q.q3, q3)
new_contents: import unittest
  import numpy as np
  from math import cos, sin
  from pymicro.crystal.microstructure import Orientation
  
  
  class QuaternionTests(unittest.TestCase):
  
      def setUp(self):
          print('testing the Quaternion class')
          self.euler_deg = [343.580, 128.653, 290.986]
  
      def test_Euler2Quaternion(self):
          euler_rad = np.radians(self.euler_deg)
          # compute quaternion using the passive convention
          q = Orientation.Euler2Quaternion(self.euler_deg, P=-1)
  
          euler = 0.5 * euler_rad
          c1 = cos(euler[0])
          s1 = sin(euler[0])
          c2 = cos(euler[1])
          s2 = sin(euler[1])
          c3 = cos(euler[2])
          s3 = sin(euler[2])
          q0 = c1 * c2 * c3 - s1 * c2 * s3
          q1 = c1 * s2 * c3 + s1 * s2 * s3
          q2 = -c1 * s2 * s3 + s1 * s2 * c3
          q3 = c1 * c2 * s3 + s1 * c2 * c3
          self.assertAlmostEqual(q.q0, q0)
          self.assertAlmostEqual(q.q1, q1)
          self.assertAlmostEqual(q.q2, q2)
          self.assertAlmostEqual(q.q3, q3)
subject: fix the name of the testing class