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QUICHE teama6ef0a62019-03-07 20:34:33 -05001// Copyright (c) 2016 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "net/third_party/quiche/src/quic/core/quic_lru_cache.h"
6
7#include "net/third_party/quiche/src/quic/platform/api/quic_test.h"
8
9namespace quic {
10namespace test {
11namespace {
12
13struct CachedItem {
14 explicit CachedItem(uint32_t new_value) : value(new_value) {}
15
16 uint32_t value;
17};
18
19TEST(QuicLRUCacheTest, InsertAndLookup) {
20 QuicLRUCache<int, CachedItem> cache(5);
21 EXPECT_EQ(nullptr, cache.Lookup(1));
22 EXPECT_EQ(0u, cache.Size());
23 EXPECT_EQ(5u, cache.MaxSize());
24
25 // Check that item 1 was properly inserted.
26 std::unique_ptr<CachedItem> item1(new CachedItem(11));
27 cache.Insert(1, std::move(item1));
28 EXPECT_EQ(1u, cache.Size());
29 EXPECT_EQ(11u, cache.Lookup(1)->value);
30
31 // Check that item 2 overrides item 1.
32 std::unique_ptr<CachedItem> item2(new CachedItem(12));
33 cache.Insert(1, std::move(item2));
34 EXPECT_EQ(1u, cache.Size());
35 EXPECT_EQ(12u, cache.Lookup(1)->value);
36
37 std::unique_ptr<CachedItem> item3(new CachedItem(13));
38 cache.Insert(3, std::move(item3));
39 EXPECT_EQ(2u, cache.Size());
40 EXPECT_EQ(13u, cache.Lookup(3)->value);
41
42 // No memory leakage.
43 cache.Clear();
44 EXPECT_EQ(0u, cache.Size());
45}
46
47TEST(QuicLRUCacheTest, Eviction) {
48 QuicLRUCache<int, CachedItem> cache(3);
49
50 for (size_t i = 1; i <= 4; ++i) {
51 std::unique_ptr<CachedItem> item(new CachedItem(10 + i));
52 cache.Insert(i, std::move(item));
53 }
54
55 EXPECT_EQ(3u, cache.Size());
56 EXPECT_EQ(3u, cache.MaxSize());
57
58 // Make sure item 1 is evicted.
59 EXPECT_EQ(nullptr, cache.Lookup(1));
60 EXPECT_EQ(14u, cache.Lookup(4)->value);
61
62 EXPECT_EQ(12u, cache.Lookup(2)->value);
63 std::unique_ptr<CachedItem> item5(new CachedItem(15));
64 cache.Insert(5, std::move(item5));
65 // Make sure item 3 is evicted.
66 EXPECT_EQ(nullptr, cache.Lookup(3));
67 EXPECT_EQ(15u, cache.Lookup(5)->value);
68
69 // No memory leakage.
70 cache.Clear();
71 EXPECT_EQ(0u, cache.Size());
72}
73
74} // namespace
75} // namespace test
76} // namespace quic