1 /*
2 * Copyright (C) 2020 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <map>
18 #include <mutex>
19 #include <string>
20 #include <string_view>
21
22 #include <android-base/format.h>
23 #include <android-base/test_utils.h>
24 #include <gmock/gmock.h>
25 #include <gtest/gtest.h>
26 #include <netdutils/NetNativeTestBase.h>
27
28 #include "Experiments.h"
29
30 namespace android::net {
31
32 class ExperimentsTest : public NetNativeTestBase {
33 public:
ExperimentsTest()34 ExperimentsTest() : mExperiments(fakeGetExperimentFlagInt) {}
35
36 protected:
fakeGetExperimentFlagInt(const std::string & key,int defaultValue)37 static int fakeGetExperimentFlagInt(const std::string& key, int defaultValue) {
38 auto it = sFakeFlagsMapInt.find(key);
39 if (it != sFakeFlagsMapInt.end()) {
40 return it->second;
41 }
42 return defaultValue;
43 }
44
setupFakeMap(int value)45 void setupFakeMap(int value) {
46 for (const auto& key : Experiments::kExperimentFlagKeyList) {
47 sFakeFlagsMapInt[key] = value;
48 }
49 }
50
setupExperimentsMap(int value)51 void setupExperimentsMap(int value) {
52 setupFakeMap(value);
53 std::lock_guard guard(mExperiments.mMutex);
54 mExperiments.mFlagsMapInt = sFakeFlagsMapInt;
55 }
56
expectFlagsMapInt()57 void expectFlagsMapInt() {
58 std::lock_guard guard(mExperiments.mMutex);
59 EXPECT_THAT(mExperiments.mFlagsMapInt, ::testing::ContainerEq(sFakeFlagsMapInt));
60 }
61
expectFlagsMapIntDefault()62 void expectFlagsMapIntDefault() {
63 std::lock_guard guard(mExperiments.mMutex);
64 for (const auto& [key, value] : mExperiments.mFlagsMapInt) {
65 EXPECT_EQ(value, Experiments::kFlagIntDefault);
66 }
67 }
68
expectGetDnsExperimentFlagIntDefault(int value)69 void expectGetDnsExperimentFlagIntDefault(int value) {
70 for (const auto& key : Experiments::kExperimentFlagKeyList) {
71 EXPECT_EQ(mExperiments.getFlag(key, value), value);
72 }
73 }
74
expectGetDnsExperimentFlagInt()75 void expectGetDnsExperimentFlagInt() {
76 std::map<std::string_view, int> tempMap;
77 for (const auto& key : Experiments::kExperimentFlagKeyList) {
78 tempMap[key] = mExperiments.getFlag(key, 0);
79 }
80 EXPECT_THAT(tempMap, ::testing::ContainerEq(sFakeFlagsMapInt));
81 }
82
expectDumpOutput()83 void expectDumpOutput() {
84 netdutils::DumpWriter dw(STDOUT_FILENO);
85 CapturedStdout captured;
86 mExperiments.dump(dw);
87 const std::string dumpString = captured.str();
88 const std::string title = "Experiments list:";
89 EXPECT_EQ(dumpString.find(title), 0U);
90 size_t startPos = title.size();
91 std::lock_guard guard(mExperiments.mMutex);
92 for (const auto& [key, value] : mExperiments.mFlagsMapInt) {
93 std::string flagDump = fmt::format("{}: {}", key, value);
94 if (value == Experiments::kFlagIntDefault) {
95 flagDump = fmt::format("{}: UNSET", key);
96 }
97 SCOPED_TRACE(flagDump);
98 size_t pos = dumpString.find(flagDump, startPos);
99 EXPECT_NE(pos, std::string::npos);
100 startPos = pos + flagDump.size();
101 }
102 EXPECT_EQ(startPos + 1, dumpString.size());
103 EXPECT_EQ(dumpString.substr(startPos), "\n");
104 }
105
106 static std::map<std::string_view, int> sFakeFlagsMapInt;
107 Experiments mExperiments;
108 };
109
110 std::map<std::string_view, int> ExperimentsTest::sFakeFlagsMapInt;
111
TEST_F(ExperimentsTest,update)112 TEST_F(ExperimentsTest, update) {
113 std::vector<int> testValues = {50, 3, 5, 0};
114 for (int testValue : testValues) {
115 setupFakeMap(testValue);
116 mExperiments.update();
117 expectFlagsMapInt();
118 }
119 }
120
TEST_F(ExperimentsTest,getDnsExperimentFlagInt)121 TEST_F(ExperimentsTest, getDnsExperimentFlagInt) {
122 std::vector<int> testValues = {5, 1, 6, 0};
123 for (int testValue : testValues) {
124 setupExperimentsMap(testValue);
125 expectGetDnsExperimentFlagInt();
126 }
127 }
128
TEST_F(ExperimentsTest,getDnsExperimentFlagIntDefaultValue)129 TEST_F(ExperimentsTest, getDnsExperimentFlagIntDefaultValue) {
130 // Clear the map and make mExperiments initialized with our default int value.
131 sFakeFlagsMapInt.clear();
132 mExperiments.update();
133 expectFlagsMapIntDefault();
134 std::vector<int> testValues = {100, 50, 30, 5};
135 for (int testValue : testValues) {
136 expectGetDnsExperimentFlagIntDefault(testValue);
137 }
138 }
139
TEST_F(ExperimentsTest,dump)140 TEST_F(ExperimentsTest, dump) {
141 std::vector<int> testValues = {100, 37, 0, 30};
142 for (int testValue : testValues) {
143 setupFakeMap(testValue);
144 mExperiments.update();
145 expectDumpOutput();
146 }
147 sFakeFlagsMapInt.clear();
148 mExperiments.update();
149 expectDumpOutput();
150 }
151
152 } // namespace android::net
153