Mercurial > hg > orthanc-stone

annotate UnitTestsSources/TestMessageBroker.cpp @ 1221:e2435a524029

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merge
author Alain Mazy <alain@mazy.be>
date Sat, 07 Dec 2019 17:47:35 +0100
parents 287ec78f63b4
children f72d1ab42932 2d8ab34c8c91
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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/MessageBroker.h"
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25 #include "../Framework/Messages/IObservable.h"
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26 #include "../Framework/Messages/IObserver.h"
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27 #include "../Framework/Messages/MessageForwarder.h"
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29
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30 int testCounter = 0;
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31 namespace {
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32
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33 using namespace OrthancStone;
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34
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35
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36 class MyObservable : public IObservable
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37 {
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38 public:
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39 struct MyCustomMessage : public IMessage
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40 {
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41 ORTHANC_STONE_MESSAGE(__FILE__, __LINE__);
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42
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43 int payload_;
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44
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45 MyCustomMessage(int payload) :
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46 payload_(payload)
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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 MyObservable(MessageBroker& broker) :
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52 IObservable(broker)
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53 {
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54 }
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55 };
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57 class MyObserver : public IObserver
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58 {
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59 public:
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60 MyObserver(MessageBroker& broker)
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61 : IObserver(broker)
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62 {}
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63
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64 void HandleCompletedMessage(const MyObservable::MyCustomMessage& message)
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65 {
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66 testCounter += message.payload_;
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67 }
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68
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69 };
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70
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71
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72 class MyIntermediate : public IObserver, public IObservable
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73 {
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74 IObservable& observedObject_;
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75 public:
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76 MyIntermediate(MessageBroker& broker, IObservable& observedObject)
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77 : IObserver(broker),
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78 IObservable(broker),
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79 observedObject_(observedObject)
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80 {
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81 observedObject_.RegisterObserverCallback(new MessageForwarder<MyObservable::MyCustomMessage>(broker, *this));
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82 }
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83 };
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84 }
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87 TEST(MessageBroker, TestPermanentConnectionSimpleUseCase)
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88 {
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89 MessageBroker broker;
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90 MyObservable observable(broker);
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91 MyObserver observer(broker);
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92
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93 // create a permanent connection between an observable and an observer
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94 observable.RegisterObserverCallback(new Callable<MyObserver, MyObservable::MyCustomMessage>(observer, &MyObserver::HandleCompletedMessage));
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95
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96 testCounter = 0;
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97 observable.BroadcastMessage(MyObservable::MyCustomMessage(12));
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98 ASSERT_EQ(12, testCounter);
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99
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100 // the connection is permanent; if we emit the same message again, the observer will be notified again
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101 testCounter = 0;
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102 observable.BroadcastMessage(MyObservable::MyCustomMessage(20));
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103 ASSERT_EQ(20, testCounter);
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104
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105 // Unregister the observer; make sure it's not called anymore
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106 observable.Unregister(&observer);
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107 testCounter = 0;
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108 observable.BroadcastMessage(MyObservable::MyCustomMessage(20));
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109 ASSERT_EQ(0, testCounter);
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110 }
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111
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112 TEST(MessageBroker, TestMessageForwarderSimpleUseCase)
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113 {
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114 MessageBroker broker;
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115 MyObservable observable(broker);
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116 MyIntermediate intermediate(broker, observable);
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117 MyObserver observer(broker);
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118
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119 // let the observer observers the intermediate that is actually forwarding the messages from the observable
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120 intermediate.RegisterObserverCallback(new Callable<MyObserver, MyObservable::MyCustomMessage>(observer, &MyObserver::HandleCompletedMessage));
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121
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122 testCounter = 0;
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123 observable.BroadcastMessage(MyObservable::MyCustomMessage(12));
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124 ASSERT_EQ(12, testCounter);
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125
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126 // the connection is permanent; if we emit the same message again, the observer will be notified again
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127 testCounter = 0;
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128 observable.BroadcastMessage(MyObservable::MyCustomMessage(20));
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129 ASSERT_EQ(20, testCounter);
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130 }
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131
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132 TEST(MessageBroker, TestPermanentConnectionDeleteObserver)
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133 {
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134 MessageBroker broker;
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135 MyObservable observable(broker);
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136 MyObserver* observer = new MyObserver(broker);
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137
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138 // create a permanent connection between an observable and an observer
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139 observable.RegisterObserverCallback(new Callable<MyObserver, MyObservable::MyCustomMessage>(*observer, &MyObserver::HandleCompletedMessage));
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140
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141 testCounter = 0;
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142 observable.BroadcastMessage(MyObservable::MyCustomMessage(12));
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143 ASSERT_EQ(12, testCounter);
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144
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145 // delete the observer and check that the callback is not called anymore
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146 delete observer;
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147
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148 // the connection is permanent; if we emit the same message again, the observer will be notified again
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149 testCounter = 0;
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150 observable.BroadcastMessage(MyObservable::MyCustomMessage(20));
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151 ASSERT_EQ(0, testCounter);
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152 }
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153
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154 TEST(MessageBroker, TestMessageForwarderDeleteIntermediate)
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155 {
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156 MessageBroker broker;
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157 MyObservable observable(broker);
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158 MyIntermediate* intermediate = new MyIntermediate(broker, observable);
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159 MyObserver observer(broker);
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160
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161 // let the observer observers the intermediate that is actually forwarding the messages from the observable
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162 intermediate->RegisterObserverCallback(new Callable<MyObserver, MyObservable::MyCustomMessage>(observer, &MyObserver::HandleCompletedMessage));
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163
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164 testCounter = 0;
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165 observable.BroadcastMessage(MyObservable::MyCustomMessage(12));
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166 ASSERT_EQ(12, testCounter);
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167
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168 delete intermediate;
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169
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170 observable.BroadcastMessage(MyObservable::MyCustomMessage(20));
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171 ASSERT_EQ(12, testCounter);
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172 }
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173
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174 TEST(MessageBroker, TestCustomMessage)
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175 {
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176 MessageBroker broker;
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177 MyObservable observable(broker);
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178 MyIntermediate intermediate(broker, observable);
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179 MyObserver observer(broker);
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180
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181 // let the observer observers the intermediate that is actually forwarding the messages from the observable
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182 intermediate.RegisterObserverCallback(new Callable<MyObserver, MyObservable::MyCustomMessage>(observer, &MyObserver::HandleCompletedMessage));
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183
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184 testCounter = 0;
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185 observable.BroadcastMessage(MyObservable::MyCustomMessage(12));
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186 ASSERT_EQ(12, testCounter);
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187
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188 // the connection is permanent; if we emit the same message again, the observer will be notified again
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189 testCounter = 0;
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190 observable.BroadcastMessage(MyObservable::MyCustomMessage(20));
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191 ASSERT_EQ(20, testCounter);
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192 }
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193
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194
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195 #if 0 /* __cplusplus >= 201103L*/
251
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196
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197 TEST(MessageBroker, TestLambdaSimpleUseCase)
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198 {
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199 MessageBroker broker;
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200 MyObservable observable(broker);
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201 MyObserver* observer = new MyObserver(broker);
251
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202
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203 // create a permanent connection between an observable and an observer
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204 observable.RegisterObserverCallback(new LambdaCallable<MyObservable::MyCustomMessage>(*observer, [&](const MyObservable::MyCustomMessage& message) {testCounter += 2 * message.payload_;}));
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205
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206 testCounter = 0;
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207 observable.BroadcastMessage(MyObservable::MyCustomMessage(12));
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208 ASSERT_EQ(24, testCounter);
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209
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210 // delete the observer and check that the callback is not called anymore
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211 delete observer;
251
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212
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213 // the connection is permanent; if we emit the same message again, the observer will be notified again
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214 testCounter = 0;
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215 observable.BroadcastMessage(MyObservable::MyCustomMessage(20));
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216 ASSERT_EQ(0, testCounter);
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217 }
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218
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219 namespace {
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220 class MyObserverWithLambda : public IObserver {
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221 private:
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222 int multiplier_; // this is a private variable we want to access in a lambda
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223
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224 public:
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225 MyObserverWithLambda(MessageBroker& broker, int multiplier, MyObservable& observable)
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226 : IObserver(broker),
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227 multiplier_(multiplier)
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228 {
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229 // register a callable to a lambda that access private members
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230 observable.RegisterObserverCallback(new LambdaCallable<MyObservable::MyCustomMessage>(*this, [this](const MyObservable::MyCustomMessage& message) {
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231 testCounter += multiplier_ * message.payload_;
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232 }));
251
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233
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234 }
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235 };
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236 }
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237
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238 TEST(MessageBroker, TestLambdaCaptureThisAndAccessPrivateMembers)
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239 {
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240 MessageBroker broker;
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241 MyObservable observable(broker);
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242 MyObserverWithLambda* observer = new MyObserverWithLambda(broker, 3, observable);
251
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243
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244 testCounter = 0;
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245 observable.BroadcastMessage(MyObservable::MyCustomMessage(12));
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246 ASSERT_EQ(36, testCounter);
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247
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248 // delete the observer and check that the callback is not called anymore
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249 delete observer;
251
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250
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251 // the connection is permanent; if we emit the same message again, the observer will be notified again
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252 testCounter = 0;
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253 observable.BroadcastMessage(MyObservable::MyCustomMessage(20));
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254 ASSERT_EQ(0, testCounter);
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255 }
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256
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257 #endif // C++ 11