old_contents: import unittest
  import numpy as N
  
  from neuroimaging.reference.axis import Axis, VoxelAxis, RegularAxis
  
  class AxisTest(unittest.TestCase):
  
      def testAxis(self):
          _axis = Axis(name='xspace')
          self.assertRaises(ValueError, Axis, name='bad_value')
  
      def testVoxelAxis(self):
          _axis = VoxelAxis(name='xspace', length=20)
          self.assertEquals(_axis.length, 20)
          self.assertEquals(len(_axis), 20)
          N.testing.assert_almost_equal(_axis.values(), N.arange(20))        
  
      def testRegularAxis(self):
          _axis = RegularAxis(name='yspace', length=20, start=1.0, step=2.0)
          v = N.arange(1,41,2).astype(N.float64)
          N.testing.assert_almost_equal(_axis.values(), v)
          print _axis
  
      def testRegularAxisEquality(self):
          a1 = RegularAxis(name='yspace', length=20, start=1.0, step=2.0)
          a2 = RegularAxis(name='yspace', length=20, start=1.0, step=2.0)
          self.assertEquals(a1, a2)
  
  if __name__ == '__main__':
      unittest.main()
  
new_contents: import unittest
  import numpy as N
  
  from neuroimaging.reference.axis import Axis, VoxelAxis, RegularAxis
  
  class AxisTest(unittest.TestCase):
  
      def test_Axis(self):
          _axis = Axis(name='xspace')
          self.assertRaises(ValueError, Axis, name='bad_value')
  
      def test_VoxelAxis(self):
          _axis = VoxelAxis(name='xspace', length=20)
          self.assertEquals(_axis.length, 20)
          self.assertEquals(len(_axis), 20)
          N.testing.assert_almost_equal(_axis.values(), N.arange(20))        
  
      def test_RegularAxis(self):
          _axis = RegularAxis(name='yspace', length=20, start=1.0, step=2.0)
          v = N.arange(1,41,2).astype(N.float64)
          N.testing.assert_almost_equal(_axis.values(), v)
          print _axis
  
      def test_RegularAxisEquality(self):
          a1 = RegularAxis(name='yspace', length=20, start=1.0, step=2.0)
          a2 = RegularAxis(name='yspace', length=20, start=1.0, step=2.0)
          self.assertEquals(a1, a2)
  
  if __name__ == '__main__':
      unittest.main()
  
subject: change test names to match the pattern used in other test files