old_contents: import unittest
  
  import numpy
  from numpy.testing import assert_array_equal
  
  from simphony.cuds.particles import ParticleContainer, Particle, Bond
  from simphony_mayavi.sources import ParticleSource, cell_array_slicer
  
  
  class TestParticleSource(unittest.TestCase):
  
      def setUp(self):
          self.points = [
              [0.0, 0.0, 0.0], [1.0, 0.0, 0.0], [0.0, 1.0, 0.0], [0.0, 0.0, 1.0]]
          self.bonds = [[0, 1], [0, 3], [1, 3, 2]]
          self.container = ParticleContainer('test')
          self.point_uids = [
              self.container.add_particle(Particle(coordinates=point))
              for point in self.points]
          self.bond_uids = [
              self.container.add_bond(
                  Bond(particles=[self.point_uids[index] for index in indices]))
              for indices in self.bonds]
  
      def test_particles(self):
          container = self.container
          source = ParticleSource.from_particles(container)
          points = source.data.points.to_array()
  
          number_of_particles = len(self.points)
          self.assertEqual(len(points), number_of_particles)
          self.assertEqual(len(source.point2index), number_of_particles)
  
          for key, index in source.point2index.iteritems():
              point = container.get_particle(key)
              assert_array_equal(points[index], point.coordinates)
  
      def test_bonds(self):
          container = self.container
          source = ParticleSource.from_particles(container)
          vtk_source = source.data
          bonds = [
              bond for bond in cell_array_slicer(vtk_source.lines.to_array())]
          number_of_bonds = len(self.bonds)
          self.assertEqual(len(bonds), number_of_bonds)
          self.assertEqual(len(source.bond2index), number_of_bonds)
  
          for key, index in source.bond2index.iteritems():
              bond = container.get_bond(key)
              particles = [source.point2index[uid] for uid in bond.particles]
              self.assertEqual(bonds[index], particles)
  
      def test_cell_array_slicer(self):
          data = numpy.array([2, 0, 1, 2, 0, 3, 3, 1, 3, 2])
          slices = [slice for slice in cell_array_slicer(data)]
          assert_array_equal(slices, [[0, 1], [0, 3], [1, 3, 2]])
  
      def test_particle_data_properties(self):
  
new_contents: import unittest
  
  import numpy
  from numpy.testing import assert_array_equal
  
  from simphony.cuds.particles import ParticleContainer, Particle, Bond
  from simphony_mayavi.sources import ParticleSource, cell_array_slicer
  
  
  class TestParticleSource(unittest.TestCase):
  
      def setUp(self):
          self.points = [
              [0.0, 0.0, 0.0], [1.0, 0.0, 0.0], [0.0, 1.0, 0.0], [0.0, 0.0, 1.0]]
          self.bonds = [[0, 1], [0, 3], [1, 3, 2]]
          self.container = ParticleContainer('test')
          self.point_uids = [
              self.container.add_particle(Particle(coordinates=point))
              for point in self.points]
          self.bond_uids = [
              self.container.add_bond(
                  Bond(particles=[self.point_uids[index] for index in indices]))
              for indices in self.bonds]
  
      def test_particles(self):
          container = self.container
          source = ParticleSource.from_particles(container)
          points = source.data.points.to_array()
  
          number_of_particles = len(self.points)
          self.assertEqual(len(points), number_of_particles)
          self.assertEqual(len(source.point2index), number_of_particles)
  
          for key, index in source.point2index.iteritems():
              point = container.get_particle(key)
              assert_array_equal(points[index], point.coordinates)
  
      def test_bonds(self):
          container = self.container
          source = ParticleSource.from_particles(container)
          vtk_source = source.data
          bonds = [
              bond for bond in cell_array_slicer(vtk_source.lines.to_array())]
          number_of_bonds = len(self.bonds)
          self.assertEqual(len(bonds), number_of_bonds)
          self.assertEqual(len(source.bond2index), number_of_bonds)
  
          for key, index in source.bond2index.iteritems():
              bond = container.get_bond(key)
              particles = [source.point2index[uid] for uid in bond.particles]
              self.assertEqual(bonds[index], particles)
  
      def test_cell_array_slicer(self):
          data = numpy.array([2, 0, 1, 2, 0, 3, 3, 1, 3, 2])
          slices = [slice for slice in cell_array_slicer(data)]
          assert_array_equal(slices, [[0, 1], [0, 3], [1, 3, 2]])
  
subject: remove incorrect commit change