old_contents: #!/usr/bin/env python
  """
  ====================
  Generators - Non Isomorphic Trees
  ====================
  
  Unit tests for WROM algorithm generator in generators/nonisomorphic_trees.py
  """
  from nose.tools import *
  from networkx import *
  
  
  class TestGeneratorNonIsomorphicTrees():
  
      def test_number_of_nonisomorphic_trees(self):
          # http://oeis.org/A000055
          assert_equal(nx.number_of_nonisomorphic_trees(2), 1)
          assert_equal(nx.number_of_nonisomorphic_trees(3), 1)
          assert_equal(nx.number_of_nonisomorphic_trees(4), 2)
          assert_equal(nx.number_of_nonisomorphic_trees(5), 3)
          assert_equal(nx.number_of_nonisomorphic_trees(6), 6)
          assert_equal(nx.number_of_nonisomorphic_trees(7), 11)
          assert_equal(nx.number_of_nonisomorphic_trees(8), 23)
  
      def test_nonisomorphic_trees(self):
          f = lambda x: list(nx.nonisomorphic_trees(x))
          assert_equal(f(3)[0].edges(), [(0, 1), (0, 2)])
          assert_equal(f(4)[0].edges(), [(0, 1), (0, 3), (1, 2)])
          assert_equal(f(4)[1].edges(), [(0, 1), (0, 2), (0, 3)])
  
new_contents: #!/usr/bin/env python
  """
  ====================
  Generators - Non Isomorphic Trees
  ====================
  
  Unit tests for WROM algorithm generator in generators/nonisomorphic_trees.py
  """
  from nose.tools import *
  from networkx import *
  
  
  class TestGeneratorNonIsomorphicTrees():
  
      def test_tree_structure(self):
          # test for tree structure for nx.nonisomorphic_trees()
          f = lambda x: list(nx.nonisomorphic_trees(x))
          for i in f(6):
              assert_true(nx.is_tree(i))
          for i in f(8):
              assert_true(nx.is_tree(i))
  
      def test_nonisomorphism(self):
          # test for non isomorphism of trees for nx.nonisomorphic_trees()
          f = lambda x: list(nx.nonisomorphic_trees(x))
          trees = f(6)
          for i in range(len(trees)):
              for j in range(i + 1, len(trees)):
                  assert_false(nx.is_isomorphic(trees[i], trees[j]))
          trees = f(8)
          for i in range(len(trees)):
              for j in range(i + 1, len(trees)):
                  assert_false(nx.is_isomorphic(trees[i], trees[j]))
  
      def test_number_of_nonisomorphic_trees(self):
          # http://oeis.org/A000055
          assert_equal(nx.number_of_nonisomorphic_trees(2), 1)
          assert_equal(nx.number_of_nonisomorphic_trees(3), 1)
          assert_equal(nx.number_of_nonisomorphic_trees(4), 2)
          assert_equal(nx.number_of_nonisomorphic_trees(5), 3)
          assert_equal(nx.number_of_nonisomorphic_trees(6), 6)
          assert_equal(nx.number_of_nonisomorphic_trees(7), 11)
          assert_equal(nx.number_of_nonisomorphic_trees(8), 23)
  
      def test_nonisomorphic_trees(self):
          f = lambda x: list(nx.nonisomorphic_trees(x))
          assert_equal(sorted(f(3)[0].edges()), [(0, 1), (0, 2)])
          assert_equal(sorted(f(4)[0].edges()), [(0, 1), (0, 3), (1, 2)])
          assert_equal(sorted(f(4)[1].edges()), [(0, 1), (0, 2), (0, 3)])
  
subject: Update test cases for nx.nonisomorphic_trees()