Mercurial > hg > orthanc-stone

annotate UnitTestsSources/TestMessageBroker.cpp @ 1066:b537002f83a9 broker

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removing broker from deprecated classes
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 15 Oct 2019 15:39:39 +0200
parents 5df50e0f0390
children 05b2e71ed145
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1 /**
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2 * Stone of Orthanc
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2019 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20
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21
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22 #include "gtest/gtest.h"
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23
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24 #include "Framework/Messages/IObservable.h"
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25 #include "Framework/Messages/IObserver.h"
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26 #include "Framework/Messages/MessageForwarder.h"
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27
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28
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29 int testCounter = 0;
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30 namespace {
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31
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32 using namespace OrthancStone;
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33
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34
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35 class MyObservable : public IObservable
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36 {
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37 public:
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38 struct MyCustomMessage : public IMessage
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39 {
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40 ORTHANC_STONE_MESSAGE(__FILE__, __LINE__);
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41
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42 int payload_;
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43
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44 MyCustomMessage(int payload) :
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45 payload_(payload)
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46 {
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47 }
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48 };
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49 };
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50
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51 class MyObserver : public IObserver
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52 {
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53 public:
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54 void HandleCompletedMessage(const MyObservable::MyCustomMessage& message)
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55 {
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56 testCounter += message.payload_;
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57 }
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58
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59 };
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60
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61
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62 class MyIntermediate : public IObserver, public IObservable
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63 {
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64 IObservable& observedObject_;
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65 public:
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66 MyIntermediate(IObservable& observedObject)
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67 : observedObject_(observedObject)
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68 {
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69 observedObject_.RegisterObserverCallback(new MessageForwarder<MyObservable::MyCustomMessage>(*this));
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70 }
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71 };
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72 }
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75 TEST(MessageBroker, TestPermanentConnectionSimpleUseCase)
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76 {
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77 MyObservable observable;
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78 MyObserver observer;
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79
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80 // create a permanent connection between an observable and an observer
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81 observable.RegisterObserverCallback(new Callable<MyObserver, MyObservable::MyCustomMessage>(observer, &MyObserver::HandleCompletedMessage));
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82
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83 testCounter = 0;
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84 observable.BroadcastMessage(MyObservable::MyCustomMessage(12));
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85 ASSERT_EQ(12, testCounter);
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86
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87 // the connection is permanent; if we emit the same message again, the observer will be notified again
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88 testCounter = 0;
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89 observable.BroadcastMessage(MyObservable::MyCustomMessage(20));
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90 ASSERT_EQ(20, testCounter);
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91
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92 // Unregister the observer; make sure it's not called anymore
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93 observable.Unregister(&observer);
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94 testCounter = 0;
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95 observable.BroadcastMessage(MyObservable::MyCustomMessage(20));
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96 ASSERT_EQ(0, testCounter);
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97 }
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98
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99 TEST(MessageBroker, TestMessageForwarderSimpleUseCase)
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100 {
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101 MyObservable observable;
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102 MyIntermediate intermediate(observable);
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103 MyObserver observer;
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104
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105 // let the observer observers the intermediate that is actually forwarding the messages from the observable
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106 intermediate.RegisterObserverCallback(new Callable<MyObserver, MyObservable::MyCustomMessage>(observer, &MyObserver::HandleCompletedMessage));
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107
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108 testCounter = 0;
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109 observable.BroadcastMessage(MyObservable::MyCustomMessage(12));
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110 ASSERT_EQ(12, testCounter);
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111
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112 // the connection is permanent; if we emit the same message again, the observer will be notified again
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113 testCounter = 0;
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114 observable.BroadcastMessage(MyObservable::MyCustomMessage(20));
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115 ASSERT_EQ(20, testCounter);
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116 }
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117
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118 TEST(MessageBroker, TestPermanentConnectionDeleteObserver)
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119 {
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120 MyObservable observable;
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121 MyObserver* observer(new MyObserver);
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122
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123 // create a permanent connection between an observable and an observer
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124 observable.RegisterObserverCallback(new Callable<MyObserver, MyObservable::MyCustomMessage>(*observer, &MyObserver::HandleCompletedMessage));
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125
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126 testCounter = 0;
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127 observable.BroadcastMessage(MyObservable::MyCustomMessage(12));
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128 ASSERT_EQ(12, testCounter);
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129
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130 // delete the observer and check that the callback is not called anymore
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131 delete observer;
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132
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133 // the connection is permanent; if we emit the same message again, the observer will be notified again
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134 testCounter = 0;
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135 observable.BroadcastMessage(MyObservable::MyCustomMessage(20));
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136 ASSERT_EQ(0, testCounter);
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137 }
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138
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139 TEST(MessageBroker, TestMessageForwarderDeleteIntermediate)
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140 {
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141 MyObservable observable;
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142 MyIntermediate* intermediate(new MyIntermediate(observable));
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143 MyObserver observer;
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144
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145 // let the observer observers the intermediate that is actually forwarding the messages from the observable
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146 intermediate->RegisterObserverCallback(new Callable<MyObserver, MyObservable::MyCustomMessage>(observer, &MyObserver::HandleCompletedMessage));
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147
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148 testCounter = 0;
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149 observable.BroadcastMessage(MyObservable::MyCustomMessage(12));
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150 ASSERT_EQ(12, testCounter);
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151
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152 delete intermediate;
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153
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154 observable.BroadcastMessage(MyObservable::MyCustomMessage(20));
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155 ASSERT_EQ(12, testCounter);
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156 }
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157
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158 TEST(MessageBroker, TestCustomMessage)
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159 {
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160 MyObservable observable;
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161 MyIntermediate intermediate(observable);
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162 MyObserver observer;
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163
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164 // let the observer observers the intermediate that is actually forwarding the messages from the observable
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165 intermediate.RegisterObserverCallback(new Callable<MyObserver, MyObservable::MyCustomMessage>(observer, &MyObserver::HandleCompletedMessage));
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166
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167 testCounter = 0;
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168 observable.BroadcastMessage(MyObservable::MyCustomMessage(12));
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169 ASSERT_EQ(12, testCounter);
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170
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171 // the connection is permanent; if we emit the same message again, the observer will be notified again
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172 testCounter = 0;
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173 observable.BroadcastMessage(MyObservable::MyCustomMessage(20));
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174 ASSERT_EQ(20, testCounter);
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175 }
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176
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177
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178 #if 0 /* __cplusplus >= 201103L*/
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179
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180 TEST(MessageBroker, TestLambdaSimpleUseCase)
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181 {
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182 MyObservable observable;
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183 MyObserver* observer(new MyObserver);
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184
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185 // create a permanent connection between an observable and an observer
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186 observable.RegisterObserverCallback(new LambdaCallable<MyObservable::MyCustomMessage>(*observer, [&](const MyObservable::MyCustomMessage& message) {testCounter += 2 * message.payload_;}));
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187
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188 testCounter = 0;
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189 observable.BroadcastMessage(MyObservable::MyCustomMessage(12));
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190 ASSERT_EQ(24, testCounter);
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191
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192 // delete the observer and check that the callback is not called anymore
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193 delete observer;
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194
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195 // the connection is permanent; if we emit the same message again, the observer will be notified again
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196 testCounter = 0;
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197 observable.BroadcastMessage(MyObservable::MyCustomMessage(20));
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198 ASSERT_EQ(0, testCounter);
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199 }
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200
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201 namespace {
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202 class MyObserverWithLambda : public IObserver {
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203 private:
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204 int multiplier_; // this is a private variable we want to access in a lambda
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205
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206 public:
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207 MyObserverWithLambda(int multiplier, MyObservable& observable)
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208 : multiplier_(multiplier)
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209 {
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210 // register a callable to a lambda that access private members
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211 observable.RegisterObserverCallback(new LambdaCallable<MyObservable::MyCustomMessage>(*this, [this](const MyObservable::MyCustomMessage& message) {
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212 testCounter += multiplier_ * message.payload_;
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213 }));
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214
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215 }
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216 };
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217 }
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218
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219 TEST(MessageBroker, TestLambdaCaptureThisAndAccessPrivateMembers)
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220 {
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221 MyObservable observable;
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222 MyObserverWithLambda* observer = new MyObserverWithLambda(3, observable);
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223
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224 testCounter = 0;
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225 observable.BroadcastMessage(MyObservable::MyCustomMessage(12));
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226 ASSERT_EQ(36, testCounter);
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227
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228 // delete the observer and check that the callback is not called anymore
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229 delete observer;
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230
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231 // the connection is permanent; if we emit the same message again, the observer will be notified again
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232 testCounter = 0;
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233 observable.BroadcastMessage(MyObservable::MyCustomMessage(20));
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234 ASSERT_EQ(0, testCounter);
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235 }
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236
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237 #endif // C++ 11