text: # Copyright 2017 Google Inc.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #      http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  """Tests for sampling_methods.utils.tree."""
  
  from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  
  import unittest
  import tree
  
  
  class TreeTest(unittest.TestCase):
  
    def setUp(self):
      node_dict = {
          1: (2, 3),
          2: (4, 5),
          3: (6, 7),
          4: [None, None],
          5: [None, None],
          6: [None, None],
          7: [None, None]
      }
      self.tree = tree.Tree(1, node_dict)
      self.tree.create_child_leaves_mapping([4, 5, 6, 7])
      node = self.tree.get_node(1)
      node.split = True
      node = self.tree.get_node(2)
      node.split = True
  
    def assertNode(self, node, name, left, right):
      self.assertEqual(node.name, name)
      self.assertEqual(node.left.name, left)
      self.assertEqual(node.right.name, right)
  
    def testTreeRootSetCorrectly(self):
      self.assertNode(self.tree.root, 1, 2, 3)
  
    def testGetNode(self):
      node = self.tree.get_node(1)
      assert isinstance(node, tree.Node)
      self.assertEqual(node.name, 1)
  
    def testFillParent(self):
      node = self.tree.get_node(3)
      self.assertEqual(node.parent.name, 1)
  
    def testGetAncestors(self):
      ancestors = self.tree.get_ancestor(5)
      self.assertTrue(all([a in ancestors for a in [1, 2]]))
  
    def testChildLeaves(self):
      leaves = self.tree.get_child_leaves(3)
      self.assertTrue(all([c in leaves for c in [6, 7]]))
  
    def testFillWeights(self):
      node = self.tree.get_node(3)
      self.assertEqual(node.weight, 0.5)
  
    def testGetPruning(self):
      node = self.tree.get_node(1)
      pruning = self.tree.get_pruning(node)
      self.assertTrue(all([n in pruning for n in [3, 4, 5]]))
  
  if __name__ == '__main__':
    unittest.main()
  