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diff --git a/src/base/trie.test.cc b/src/base/trie.test.cc
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+/*
+ * Copyright (c) 2012 Google
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ */
+
+#include <gtest/gtest.h>
+
+#include <iostream>
+#include <sstream>
+#include <string>
+
+#include "base/trie.hh"
+#include "base/types.hh"
+
+namespace {
+
+static inline uint32_t *ptr(uintptr_t val)
+{
+    return (uint32_t *)val;
+}
+
+} // anonymous namespace
+
+class TrieTestData : public testing::Test
+{
+  protected:
+    typedef Trie<Addr, uint32_t> TrieType;
+    TrieType trie;
+
+    std::string
+    dumpTrie()
+    {
+        std::stringstream ss;
+        trie.dump("test trie", ss);
+        return ss.str();
+    }
+};
+
+TEST_F(TrieTestData, Empty)
+{
+    EXPECT_EQ(trie.lookup(0x123456701234567), nullptr) << dumpTrie();
+}
+
+TEST_F(TrieTestData, SingleEntry)
+{
+    trie.insert(0x0123456789abcdef, 40, ptr(1));
+    EXPECT_EQ(trie.lookup(0x123456701234567), nullptr) << dumpTrie();
+    EXPECT_EQ(trie.lookup(0x123456789ab0000), ptr(1)) << dumpTrie();
+}
+
+TEST_F(TrieTestData, TwoOverlappingEntries)
+{
+    trie.insert(0x0123456789abcdef, 40, ptr(1));
+    trie.insert(0x0123456789abcdef, 36, ptr(2));
+    EXPECT_EQ(trie.lookup(0x123456700000000), nullptr) << dumpTrie();
+    EXPECT_EQ(trie.lookup(0x123456789ab0000), ptr(2)) << dumpTrie();
+}
+
+TEST_F(TrieTestData, TwoOverlappingEntriesReversed)
+{
+    trie.insert(0x0123456789abcdef, 36, ptr(2));
+    trie.insert(0x0123456789abcdef, 40, ptr(1));
+    EXPECT_EQ(trie.lookup(0x123456700000000), nullptr) << dumpTrie();
+    EXPECT_EQ(trie.lookup(0x123456789ab0000), ptr(2)) << dumpTrie();
+}
+
+TEST_F(TrieTestData, TwoIndependentEntries)
+{
+    trie.insert(0x0123456789abcdef, 40, ptr(2));
+    trie.insert(0x0123456776543210, 40, ptr(1));
+    EXPECT_EQ(trie.lookup(0x0123456789000000), ptr(2)) << dumpTrie();
+    EXPECT_EQ(trie.lookup(0x0123456776000000), ptr(1)) << dumpTrie();
+    EXPECT_EQ(trie.lookup(0x0123456700000000), nullptr) << dumpTrie();
+}
+
+TEST_F(TrieTestData, TwoEntries)
+{
+    trie.insert(0x0123456789000000, 40, ptr(4));
+    trie.insert(0x0123000000000000, 40, ptr(1));
+    trie.insert(0x0123456780000000, 40, ptr(3));
+    trie.insert(0x0123456700000000, 40, ptr(2));
+
+    EXPECT_EQ(trie.lookup(0x0123000000000000), ptr(1)) << dumpTrie();
+    EXPECT_EQ(trie.lookup(0x0123456700000000), ptr(2)) << dumpTrie();
+    EXPECT_EQ(trie.lookup(0x0123456780000000), ptr(3)) << dumpTrie();
+    EXPECT_EQ(trie.lookup(0x0123456789000000), ptr(4)) << dumpTrie();
+}
+
+TEST_F(TrieTestData, RemovingEntries)
+{
+    TrieType::Handle node1, node2;
+    trie.insert(0x0123456789000000, 40, ptr(4));
+    trie.insert(0x0123000000000000, 40, ptr(1));
+    trie.insert(0x0123456780000000, 40, ptr(3));
+    node1 = trie.insert(0x0123456700000000, 40, ptr(2));
+    node2 = trie.insert(0x0123456700000000, 32, ptr(10));
+
+    EXPECT_EQ(trie.lookup(0x0123000000000000), ptr(1)) << dumpTrie();
+    EXPECT_EQ(trie.lookup(0x0123456700000000), ptr(10)) << dumpTrie();
+    EXPECT_EQ(trie.lookup(0x0123456780000000), ptr(10)) << dumpTrie();
+    EXPECT_EQ(trie.lookup(0x0123456789000000), ptr(10)) << dumpTrie();
+
+    trie.remove(node2);
+
+    EXPECT_EQ(trie.lookup(0x0123000000000000), ptr(1)) << dumpTrie();
+    EXPECT_EQ(trie.lookup(0x0123456700000000), ptr(2)) << dumpTrie();
+    EXPECT_EQ(trie.lookup(0x0123456780000000), ptr(3)) << dumpTrie();
+    EXPECT_EQ(trie.lookup(0x0123456789000000), ptr(4)) << dumpTrie();
+
+    trie.remove(node1);
+
+    EXPECT_EQ(trie.lookup(0x0123000000000000), ptr(1)) << dumpTrie();
+    EXPECT_EQ(trie.lookup(0x0123456700000000), nullptr) << dumpTrie();
+    EXPECT_EQ(trie.lookup(0x0123456780000000), ptr(3)) << dumpTrie();
+    EXPECT_EQ(trie.lookup(0x0123456789000000), ptr(4)) << dumpTrie();
+}