1/*
2 * Copyright (c) 2012 Google
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Gabe Black
29 */
30
31#include <gtest/gtest.h>
32
33#include <iostream>
34#include <sstream>
35#include <string>
36
37#include "base/trie.hh"
38#include "base/types.hh"
39
40namespace {
41
42static inline uint32_t *ptr(uintptr_t val)
43{
44    return (uint32_t *)val;
45}
46
47} // anonymous namespace
48
49class TrieTestData : public testing::Test
50{
51  protected:
52    typedef Trie<Addr, uint32_t> TrieType;
53    TrieType trie;
54
55    std::string
56    dumpTrie()
57    {
58        std::stringstream ss;
59        trie.dump("test trie", ss);
60        return ss.str();
61    }
62};
63
64TEST_F(TrieTestData, Empty)
65{
66    EXPECT_EQ(trie.lookup(0x123456701234567), nullptr) << dumpTrie();
67}
68
69TEST_F(TrieTestData, SingleEntry)
70{
71    trie.insert(0x0123456789abcdef, 40, ptr(1));
72    EXPECT_EQ(trie.lookup(0x123456701234567), nullptr) << dumpTrie();
73    EXPECT_EQ(trie.lookup(0x123456789ab0000), ptr(1)) << dumpTrie();
74}
75
76TEST_F(TrieTestData, TwoOverlappingEntries)
77{
78    trie.insert(0x0123456789abcdef, 40, ptr(1));
79    trie.insert(0x0123456789abcdef, 36, ptr(2));
80    EXPECT_EQ(trie.lookup(0x123456700000000), nullptr) << dumpTrie();
81    EXPECT_EQ(trie.lookup(0x123456789ab0000), ptr(2)) << dumpTrie();
82}
83
84TEST_F(TrieTestData, TwoOverlappingEntriesReversed)
85{
86    trie.insert(0x0123456789abcdef, 36, ptr(2));
87    trie.insert(0x0123456789abcdef, 40, ptr(1));
88    EXPECT_EQ(trie.lookup(0x123456700000000), nullptr) << dumpTrie();
89    EXPECT_EQ(trie.lookup(0x123456789ab0000), ptr(2)) << dumpTrie();
90}
91
92TEST_F(TrieTestData, TwoIndependentEntries)
93{
94    trie.insert(0x0123456789abcdef, 40, ptr(2));
95    trie.insert(0x0123456776543210, 40, ptr(1));
96    EXPECT_EQ(trie.lookup(0x0123456789000000), ptr(2)) << dumpTrie();
97    EXPECT_EQ(trie.lookup(0x0123456776000000), ptr(1)) << dumpTrie();
98    EXPECT_EQ(trie.lookup(0x0123456700000000), nullptr) << dumpTrie();
99}
100
101TEST_F(TrieTestData, TwoEntries)
102{
103    trie.insert(0x0123456789000000, 40, ptr(4));
104    trie.insert(0x0123000000000000, 40, ptr(1));
105    trie.insert(0x0123456780000000, 40, ptr(3));
106    trie.insert(0x0123456700000000, 40, ptr(2));
107
108    EXPECT_EQ(trie.lookup(0x0123000000000000), ptr(1)) << dumpTrie();
109    EXPECT_EQ(trie.lookup(0x0123456700000000), ptr(2)) << dumpTrie();
110    EXPECT_EQ(trie.lookup(0x0123456780000000), ptr(3)) << dumpTrie();
111    EXPECT_EQ(trie.lookup(0x0123456789000000), ptr(4)) << dumpTrie();
112}
113
114TEST_F(TrieTestData, RemovingEntries)
115{
116    TrieType::Handle node1, node2;
117    trie.insert(0x0123456789000000, 40, ptr(4));
118    trie.insert(0x0123000000000000, 40, ptr(1));
119    trie.insert(0x0123456780000000, 40, ptr(3));
120    node1 = trie.insert(0x0123456700000000, 40, ptr(2));
121    node2 = trie.insert(0x0123456700000000, 32, ptr(10));
122
123    EXPECT_EQ(trie.lookup(0x0123000000000000), ptr(1)) << dumpTrie();
124    EXPECT_EQ(trie.lookup(0x0123456700000000), ptr(10)) << dumpTrie();
125    EXPECT_EQ(trie.lookup(0x0123456780000000), ptr(10)) << dumpTrie();
126    EXPECT_EQ(trie.lookup(0x0123456789000000), ptr(10)) << dumpTrie();
127
128    trie.remove(node2);
129
130    EXPECT_EQ(trie.lookup(0x0123000000000000), ptr(1)) << dumpTrie();
131    EXPECT_EQ(trie.lookup(0x0123456700000000), ptr(2)) << dumpTrie();
132    EXPECT_EQ(trie.lookup(0x0123456780000000), ptr(3)) << dumpTrie();
133    EXPECT_EQ(trie.lookup(0x0123456789000000), ptr(4)) << dumpTrie();
134
135    trie.remove(node1);
136
137    EXPECT_EQ(trie.lookup(0x0123000000000000), ptr(1)) << dumpTrie();
138    EXPECT_EQ(trie.lookup(0x0123456700000000), nullptr) << dumpTrie();
139    EXPECT_EQ(trie.lookup(0x0123456780000000), ptr(3)) << dumpTrie();
140    EXPECT_EQ(trie.lookup(0x0123456789000000), ptr(4)) << dumpTrie();
141}
142