| #!/usr/bin/python2.4 |
| # |
| # Copyright 2011 Google Inc. All Rights Reserved. |
| # |
| # 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 trie_node.""" |
| |
| __author__ = 'bmcquade@google.com (Bryan McQuade)' |
| |
| import unittest |
| |
| import trie_node |
| |
| class TrieNodeTest(unittest.TestCase): |
| """Test cases for TrieNode.""" |
| |
| def testRoot(self): |
| """Tests the properties of a root node.""" |
| root = trie_node.TrieNode() |
| self.assertRaises(AttributeError, trie_node.TrieNode.GetName, root) |
| self.assertRaises(AttributeError, trie_node.TrieNode.GetParent, root) |
| self.assertEqual([], root.GetParentChain()) |
| self.assertEqual('', root.GetIdentifier()) |
| self.assertRaises(ValueError, trie_node.TrieNode.GetChild, root, 'a') |
| self.assertFalse(root.HasChildren()) |
| self.assertEqual([], root.GetChildren()) |
| self.assertFalse(root.IsTerminalNode()) |
| |
| def testAddChildren(self): |
| """Tests that AddChild and variants behaves as expected.""" |
| root = trie_node.TrieNode() |
| root.AddChild('a') |
| a = root.GetChild('a') |
| self.assertNotEqual(None, a) |
| self.assertNotEqual(None, root.GetOrCreateChild('a')) |
| self.assertEqual('a', a.GetName()) |
| self.assertEqual('a', a.GetIdentifier()) |
| self.assertRaises(ValueError, trie_node.TrieNode.AddChild, root, 'a') |
| self.assertFalse(a.HasChildren()) |
| |
| self.assertNotEqual(None, root.GetOrCreateChild('b')) |
| b = root.GetChild('b') |
| self.assertNotEqual(None, b) |
| self.assertEqual('b', b.GetName()) |
| self.assertEqual('b', b.GetIdentifier()) |
| self.assertFalse(b.HasChildren()) |
| |
| self.assertTrue(root.HasChildren()) |
| self.assertEqual([a, b], root.GetChildren()) |
| |
| def testTrieDepth(self): |
| """Tests parent chain/identifier computations for 3-deep tries.""" |
| root = trie_node.TrieNode() |
| a = root.GetOrCreateChild('a') |
| ab = a.GetOrCreateChild('b') |
| ac = a.GetOrCreateChild('c') |
| ab2 = ab.GetOrCreateChild('2') |
| ab1 = ab.GetOrCreateChild('1') |
| |
| self.assertTrue(a.HasChildren()) |
| self.assertTrue(ab.HasChildren()) |
| self.assertFalse(ac.HasChildren()) |
| self.assertFalse(ab1.HasChildren()) |
| |
| self.assertEqual('1', ab1.GetName()) |
| self.assertEqual('1ba', ab1.GetIdentifier()) |
| self.assertEqual('1.b.a', ab1.GetIdentifier('.')) |
| self.assertEqual(['1', 'b', 'a'], ab1.GetParentChain()) |
| |
| self.assertEqual([ab1, ab2], ab.GetChildren()) |
| self.assertEqual([ab, ac], a.GetChildren()) |
| |
| if __name__ == '__main__': |
| unittest.main() |
| |
| |
