Permanent folders changes

ui/base/models/tree_node_iterator_unittest.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 #include "ui/base/models/tree_node_iterator.h"
 #include "ui/base/models/tree_node_model.h"
 
 namespace ui {
@@ skipping 20 matching lines @@
 
   ASSERT_TRUE(iterator.has_next());
   ASSERT_EQ(f4, iterator.Next());
 
   ASSERT_TRUE(iterator.has_next());
   ASSERT_EQ(f4->GetChild(0), iterator.Next());
 
   ASSERT_FALSE(iterator.has_next());
 }
 
+static bool PruneOdd(TreeNodeWithValue<int>* node) {
+  return node->value % 2;
+}
+
+static bool PruneEven(TreeNodeWithValue<int>* node) {
+  return !(node->value % 2);
+}
+
+// The tree used for testing:
+// * + 1
+//   + 2
+//   + 3 + 4 + 5
+//       + 7
+
+TEST(TreeNodeIteratorPruneTest, Test) {
+  TreeNodeWithValue<int> root;
+  root.Add(new TreeNodeWithValue<int>(1), 0);
+  root.Add(new TreeNodeWithValue<int>(2), 1);
+  TreeNodeWithValue<int>* f3 = new TreeNodeWithValue<int>(3);
+  root.Add(f3, 2);
+  TreeNodeWithValue<int>* f4 = new TreeNodeWithValue<int>(4);
+  f3->Add(f4, 0);
+  f4->Add(new TreeNodeWithValue<int>(5), 0);
+  f3->Add(new TreeNodeWithValue<int>(7), 1);
+
+  TreeNodeIterator<TreeNodeWithValue<int> > oddIterator(&root, PruneOdd);
+  ASSERT_TRUE(oddIterator.has_next());
+  ASSERT_EQ(2, oddIterator.Next()->value);
+  ASSERT_FALSE(oddIterator.has_next());
+
+  TreeNodeIterator<TreeNodeWithValue<int> > evenIterator(&root, PruneEven);
+  ASSERT_TRUE(evenIterator.has_next());
+  ASSERT_EQ(1, evenIterator.Next()->value);
+  ASSERT_TRUE(evenIterator.has_next());
+  ASSERT_EQ(3, evenIterator.Next()->value);
+  ASSERT_TRUE(evenIterator.has_next());
+  ASSERT_EQ(7, evenIterator.Next()->value);
+  ASSERT_FALSE(evenIterator.has_next());
+}
+
 }  // namespace ui