Mercurial > hg > orthanc-stone

annotate UnitTestsSources/TestMessageBroker.cpp @ 1038:692291406f6a

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virtual Render
author Alain Mazy <alain@mazy.be>
date Mon, 07 Oct 2019 22:11:46 +0200
parents f0008c55e5f7
children 5df50e0f0390
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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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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/Promise.h"
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26 #include "Framework/Messages/IObservable.h"
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27 #include "Framework/Messages/IObserver.h"
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28 #include "Framework/Messages/MessageForwarder.h"
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29
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31 int testCounter = 0;
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32 namespace {
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33
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34 using namespace OrthancStone;
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35
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36
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37 class MyObservable : public IObservable
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38 {
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39 public:
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40 struct MyCustomMessage : public IMessage
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41 {
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42 ORTHANC_STONE_MESSAGE(__FILE__, __LINE__);
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43
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44 int payload_;
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45
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46 MyCustomMessage(int payload) :
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47 payload_(payload)
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48 {
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49 }
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50 };
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51
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52 MyObservable(MessageBroker& broker) :
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53 IObservable(broker)
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54 {
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55 }
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56 };
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57
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58 class MyObserver : public IObserver
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59 {
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60 public:
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61 MyObserver(MessageBroker& broker)
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62 : IObserver(broker)
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63 {}
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64
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65 void HandleCompletedMessage(const MyObservable::MyCustomMessage& message)
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66 {
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67 testCounter += message.payload_;
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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
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73 class MyIntermediate : public IObserver, public IObservable
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74 {
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75 IObservable& observedObject_;
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76 public:
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77 MyIntermediate(MessageBroker& broker, IObservable& observedObject)
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78 : IObserver(broker),
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79 IObservable(broker),
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80 observedObject_(observedObject)
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81 {
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82 observedObject_.RegisterObserverCallback(new MessageForwarder<MyObservable::MyCustomMessage>(broker, *this));
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83 }
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84 };
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86
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87 class MyPromiseSource : public IObservable
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88 {
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89 Promise* currentPromise_;
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91 public:
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92 struct MyPromiseMessage: public IMessage
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93 {
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94 ORTHANC_STONE_MESSAGE(__FILE__, __LINE__);
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95
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96 int increment;
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97
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98 MyPromiseMessage(int increment) :
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99 increment(increment)
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100 {
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101 }
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102 };
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103
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104 MyPromiseSource(MessageBroker& broker)
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105 : IObservable(broker),
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106 currentPromise_(NULL)
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107 {}
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108
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109 Promise& StartSomethingAsync()
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110 {
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111 currentPromise_ = new Promise(GetBroker());
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112 return *currentPromise_;
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113 }
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114
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115 void CompleteSomethingAsyncWithSuccess(int payload)
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116 {
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117 currentPromise_->Success(MyPromiseMessage(payload));
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118 delete currentPromise_;
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119 }
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120
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121 void CompleteSomethingAsyncWithFailure(int payload)
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122 {
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123 currentPromise_->Failure(MyPromiseMessage(payload));
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124 delete currentPromise_;
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125 }
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126 };
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127
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129 class MyPromiseTarget : public IObserver
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130 {
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131 public:
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132 MyPromiseTarget(MessageBroker& broker)
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133 : IObserver(broker)
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134 {}
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135
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136 void IncrementCounter(const MyPromiseSource::MyPromiseMessage& args)
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137 {
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138 testCounter += args.increment;
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139 }
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140
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141 void DecrementCounter(const MyPromiseSource::MyPromiseMessage& args)
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142 {
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143 testCounter -= args.increment;
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144 }
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145 };
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146 }
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148
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149 TEST(MessageBroker, TestPermanentConnectionSimpleUseCase)
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150 {
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151 MessageBroker broker;
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152 MyObservable observable(broker);
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153 MyObserver observer(broker);
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154
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155 // create a permanent connection between an observable and an observer
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156 observable.RegisterObserverCallback(new Callable<MyObserver, MyObservable::MyCustomMessage>(observer, &MyObserver::HandleCompletedMessage));
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157
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158 testCounter = 0;
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159 observable.BroadcastMessage(MyObservable::MyCustomMessage(12));
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160 ASSERT_EQ(12, testCounter);
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161
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162 // the connection is permanent; if we emit the same message again, the observer will be notified again
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163 testCounter = 0;
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164 observable.BroadcastMessage(MyObservable::MyCustomMessage(20));
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165 ASSERT_EQ(20, testCounter);
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166
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167 // Unregister the observer; make sure it's not called anymore
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168 observable.Unregister(&observer);
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169 testCounter = 0;
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170 observable.BroadcastMessage(MyObservable::MyCustomMessage(20));
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171 ASSERT_EQ(0, testCounter);
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172 }
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173
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174 TEST(MessageBroker, TestMessageForwarderSimpleUseCase)
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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 TEST(MessageBroker, TestPermanentConnectionDeleteObserver)
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195 {
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196 MessageBroker broker;
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197 MyObservable observable(broker);
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198 MyObserver* observer = new MyObserver(broker);
251
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199
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200 // create a permanent connection between an observable and an observer
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201 observable.RegisterObserverCallback(new Callable<MyObserver, MyObservable::MyCustomMessage>(*observer, &MyObserver::HandleCompletedMessage));
267
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202
428
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203 testCounter = 0;
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204 observable.BroadcastMessage(MyObservable::MyCustomMessage(12));
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205 ASSERT_EQ(12, testCounter);
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206
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207 // delete the observer and check that the callback is not called anymore
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208 delete observer;
267
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209
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210 // the connection is permanent; if we emit the same message again, the observer will be notified again
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211 testCounter = 0;
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212 observable.BroadcastMessage(MyObservable::MyCustomMessage(20));
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213 ASSERT_EQ(0, testCounter);
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214 }
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215
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216 TEST(MessageBroker, TestMessageForwarderDeleteIntermediate)
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217 {
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218 MessageBroker broker;
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219 MyObservable observable(broker);
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220 MyIntermediate* intermediate = new MyIntermediate(broker, observable);
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221 MyObserver observer(broker);
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222
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223 // let the observer observers the intermediate that is actually forwarding the messages from the observable
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224 intermediate->RegisterObserverCallback(new Callable<MyObserver, MyObservable::MyCustomMessage>(observer, &MyObserver::HandleCompletedMessage));
267
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225
428
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226 testCounter = 0;
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227 observable.BroadcastMessage(MyObservable::MyCustomMessage(12));
428
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228 ASSERT_EQ(12, testCounter);
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229
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230 delete intermediate;
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231
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232 observable.BroadcastMessage(MyObservable::MyCustomMessage(20));
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233 ASSERT_EQ(12, testCounter);
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234 }
251
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235
428
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236 TEST(MessageBroker, TestCustomMessage)
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237 {
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238 MessageBroker broker;
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239 MyObservable observable(broker);
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240 MyIntermediate intermediate(broker, observable);
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241 MyObserver observer(broker);
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242
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243 // let the observer observers the intermediate that is actually forwarding the messages from the observable
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244 intermediate.RegisterObserverCallback(new Callable<MyObserver, MyObservable::MyCustomMessage>(observer, &MyObserver::HandleCompletedMessage));
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245
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246 testCounter = 0;
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247 observable.BroadcastMessage(MyObservable::MyCustomMessage(12));
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248 ASSERT_EQ(12, testCounter);
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249
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250 // the connection is permanent; if we emit the same message again, the observer will be notified again
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251 testCounter = 0;
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252 observable.BroadcastMessage(MyObservable::MyCustomMessage(20));
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253 ASSERT_EQ(20, testCounter);
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254 }
251
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255
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256
428
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257 TEST(MessageBroker, TestPromiseSuccessFailure)
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258 {
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259 MessageBroker broker;
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260 MyPromiseSource source(broker);
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261 MyPromiseTarget target(broker);
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262
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263 // test a successful promise
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264 source.StartSomethingAsync()
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265 .Then(new Callable<MyPromiseTarget, MyPromiseSource::MyPromiseMessage>(target, &MyPromiseTarget::IncrementCounter))
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266 .Else(new Callable<MyPromiseTarget, MyPromiseSource::MyPromiseMessage>(target, &MyPromiseTarget::DecrementCounter));
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267
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268 testCounter = 0;
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269 source.CompleteSomethingAsyncWithSuccess(10);
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270 ASSERT_EQ(10, testCounter);
251
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271
428
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272 // test a failing promise
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273 source.StartSomethingAsync()
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274 .Then(new Callable<MyPromiseTarget, MyPromiseSource::MyPromiseMessage>(target, &MyPromiseTarget::IncrementCounter))
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275 .Else(new Callable<MyPromiseTarget, MyPromiseSource::MyPromiseMessage>(target, &MyPromiseTarget::DecrementCounter));
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276
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277 testCounter = 0;
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278 source.CompleteSomethingAsyncWithFailure(15);
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279 ASSERT_EQ(-15, testCounter);
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280 }
251
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281
428
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282 TEST(MessageBroker, TestPromiseDeleteTarget)
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283 {
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284 MessageBroker broker;
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285 MyPromiseSource source(broker);
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286 MyPromiseTarget* target = new MyPromiseTarget(broker);
251
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287
428
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288 // create the promise
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289 source.StartSomethingAsync()
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290 .Then(new Callable<MyPromiseTarget, MyPromiseSource::MyPromiseMessage>(*target, &MyPromiseTarget::IncrementCounter))
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291 .Else(new Callable<MyPromiseTarget, MyPromiseSource::MyPromiseMessage>(*target, &MyPromiseTarget::DecrementCounter));
251
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292
428
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293 // delete the promise target
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294 delete target;
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295
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296 // trigger the promise, make sure it does not throw and does not call the callback
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297 testCounter = 0;
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298 source.CompleteSomethingAsyncWithSuccess(10);
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299 ASSERT_EQ(0, testCounter);
251
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300
428
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301 // test a failing promise
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302 source.StartSomethingAsync()
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303 .Then(new Callable<MyPromiseTarget, MyPromiseSource::MyPromiseMessage>(*target, &MyPromiseTarget::IncrementCounter))
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304 .Else(new Callable<MyPromiseTarget, MyPromiseSource::MyPromiseMessage>(*target, &MyPromiseTarget::DecrementCounter));
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305
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306 testCounter = 0;
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307 source.CompleteSomethingAsyncWithFailure(15);
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308 ASSERT_EQ(0, testCounter);
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309 }
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310
560
aaeec7be8fb7 add support for alpha channel in CairoSurface
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311 #if 0 /* __cplusplus >= 201103L*/
251
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312
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313 TEST(MessageBroker, TestLambdaSimpleUseCase)
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314 {
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315 MessageBroker broker;
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316 MyObservable observable(broker);
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317 MyObserver* observer = new MyObserver(broker);
251
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318
428
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319 // create a permanent connection between an observable and an observer
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320 observable.RegisterObserverCallback(new LambdaCallable<MyObservable::MyCustomMessage>(*observer, [&](const MyObservable::MyCustomMessage& message) {testCounter += 2 * message.payload_;}));
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321
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322 testCounter = 0;
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323 observable.BroadcastMessage(MyObservable::MyCustomMessage(12));
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324 ASSERT_EQ(24, testCounter);
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325
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326 // delete the observer and check that the callback is not called anymore
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327 delete observer;
251
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328
428
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329 // the connection is permanent; if we emit the same message again, the observer will be notified again
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330 testCounter = 0;
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331 observable.BroadcastMessage(MyObservable::MyCustomMessage(20));
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332 ASSERT_EQ(0, testCounter);
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333 }
251
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334
428
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335 namespace {
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336 class MyObserverWithLambda : public IObserver {
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337 private:
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338 int multiplier_; // this is a private variable we want to access in a lambda
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339
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340 public:
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341 MyObserverWithLambda(MessageBroker& broker, int multiplier, MyObservable& observable)
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342 : IObserver(broker),
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343 multiplier_(multiplier)
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344 {
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345 // register a callable to a lambda that access private members
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346 observable.RegisterObserverCallback(new LambdaCallable<MyObservable::MyCustomMessage>(*this, [this](const MyObservable::MyCustomMessage& message) {
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347 testCounter += multiplier_ * message.payload_;
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348 }));
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349
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350 }
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351 };
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352 }
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353
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354 TEST(MessageBroker, TestLambdaCaptureThisAndAccessPrivateMembers)
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355 {
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356 MessageBroker broker;
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357 MyObservable observable(broker);
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358 MyObserverWithLambda* observer = new MyObserverWithLambda(broker, 3, observable);
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359
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360 testCounter = 0;
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361 observable.BroadcastMessage(MyObservable::MyCustomMessage(12));
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362 ASSERT_EQ(36, testCounter);
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363
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364 // delete the observer and check that the callback is not called anymore
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365 delete observer;
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366
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367 // the connection is permanent; if we emit the same message again, the observer will be notified again
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368 testCounter = 0;
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369 observable.BroadcastMessage(MyObservable::MyCustomMessage(20));
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370 ASSERT_EQ(0, testCounter);
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371 }
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372
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373 #endif // C++ 11