[IndexedDB] Adding transaction and value support to observers

content/browser/indexed_db/list_set_unittest.cc

 // Copyright (c) 2012 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 "content/browser/indexed_db/list_set.h"
 
 #include <memory>
 
 #include "base/memory/ptr_util.h"
 #include "base/memory/ref_counted.h"
@@ skipping 32 matching lines @@
   const list_set<int>& ref = set;
 
   list_set<int>::const_iterator it = ref.begin();
   for (int i = 5; i > 0; --i) {
     EXPECT_EQ(i, *it);
     ++it;
   }
   EXPECT_EQ(ref.end(), it);
 }
 
+TEST(ListSetTest, ListSetInsertFront) {
+  list_set<int> set;
+  for (int i = 5; i > 0; --i)
+    set.insert(i);
+  for (int i = 6; i <= 10; ++i)
+    set.insert_front(i);
+
+  const list_set<int>& ref = set;
+
+  list_set<int>::const_iterator it = ref.begin();
+  for (int i = 10; i > 0; --i) {
+    EXPECT_EQ(i, *it);
+    ++it;
+  }
+  EXPECT_EQ(ref.end(), it);
+}
+
 TEST(ListSetTest, ListSetPrimitive) {
   list_set<int> set;
   EXPECT_TRUE(set.empty());
   EXPECT_EQ(0u, set.size());
   {
     list_set<int>::iterator it = set.begin();
     EXPECT_EQ(set.end(), it);
   }
 
   for (int i = 5; i > 0; --i)
@@ skipping 171 matching lines @@
   set.erase(r2);
 
   EXPECT_EQ(0u, set.size());
   {
     list_set<scoped_refptr<RefCounted<int> > >::iterator it = set.begin();
     EXPECT_EQ(set.end(), it);
   }
 }
 
 }  // namespace content