1 | #include "gtest/gtest.h"
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2 | #include "ariba/utility/system/SystemQueue.h"
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3 |
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4 | #include <unistd.h> // usleep
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5 | #include <boost/date_time.hpp> // local_time()
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6 |
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7 | #include <ostream>
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8 |
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9 | using namespace ::testing;
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10 | using namespace ariba::utility;
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11 | using namespace std;
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12 |
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13 | using boost::posix_time::microsec_clock;
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14 |
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15 |
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16 | /**
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17 | * Tests if the SystemQueue is initialized empty and not running.
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18 | */
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19 | TEST(SystemQueue, Instantiation)
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20 | {
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21 | SystemQueue& sysq = SystemQueue::instance();
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22 |
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23 | // cout << &sysq << endl;
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24 |
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25 | EXPECT_FALSE( sysq.isRunning() );
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26 | EXPECT_TRUE( sysq.isEmpty() );
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27 | }
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28 |
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29 |
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30 | /**
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31 | * Tests whether calling the SystemQueue::instance() always returns the same object.
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32 | *
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33 | * NOTE: This is an easy case, since this is the same compile unit..
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34 | * But can't hurt to test it anyway.
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35 | */
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36 | TEST(SystemQueue, Singleton)
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37 | {
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38 | SystemQueue& sysq = SystemQueue::instance();
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39 | SystemQueue& sysq2 = SystemQueue::instance();
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40 |
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41 | // cout << &sysq << endl;
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42 |
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43 | EXPECT_TRUE( &sysq == &sysq2 );
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44 | }
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45 |
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46 |
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47 | /**
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48 | * Start and stop the SystemQueue
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49 | */
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50 | TEST(SystemQueue, StartStop)
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51 | {
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52 | SystemQueue& sysq = SystemQueue::instance();
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53 |
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54 | EXPECT_FALSE( sysq.isRunning() );
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55 |
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56 | // start
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57 | sysq.run();
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58 |
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59 | EXPECT_TRUE( sysq.isRunning() );
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60 |
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61 | // stop
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62 | sysq.cancel();
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63 |
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64 | // XXX weg, wenn das join klappt!!
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65 | usleep(100);
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66 |
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67 | EXPECT_FALSE( sysq.isRunning() );
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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 | * Test fixture
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73 | *
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74 | * class that can be called by the SystemQueue
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75 | */
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76 | // To use a test fixture, derive a class from testing::Test.
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77 | class SystemQueueTest :
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78 | public testing::Test
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79 | {
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80 | public:
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81 |
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82 | // sleep time when waiting for the system queue (max total / each step)
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83 | #define MAX_WAIT 100 // microseconds
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84 | #define SLEEP_TIME 10 // microseconds
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85 |
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86 | SystemQueueTest() :
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87 | checkmark(false),
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88 | last_ordered_call(0)
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89 | {
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90 | }
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91 |
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92 | void Check()
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93 | {
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94 | cout << "### Check ### "<< endl;
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95 |
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96 | checkmark = true;
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97 | }
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98 |
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99 | void Cancel()
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100 | {
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101 | cout << "### Cancel ### "<< endl;
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102 |
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103 | SystemQueue::instance().cancel();
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104 | checkmark = true;
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105 | }
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106 |
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107 | void LongRunner()
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108 | {
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109 | usleep( MAX_WAIT / 2 );
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110 |
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111 | checkmark = true;
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112 | }
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113 |
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114 |
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115 | /// wait for the checkmark to be set by a SystemQueue call, (but not too long!)
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116 | void wait_for_checkmark(int max_wait = MAX_WAIT)
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117 | {
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118 | for ( int i = 0; i < max_wait / SLEEP_TIME; i++)
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119 | {
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120 | if ( checkmark )
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121 | break;
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122 |
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123 | cout << "### sleeping for " << SLEEP_TIME << " microseconds ..." << endl;
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124 | usleep(SLEEP_TIME);
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125 | }
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126 | }
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127 |
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128 | /// call that checks wheather it was performed in order
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129 | void OrderedCall(int num)
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130 | {
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131 | // XXX
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132 | cout << "### OrderedCall num: " << num << endl;
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133 |
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134 | // check ordering
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135 | EXPECT_EQ( num, last_ordered_call + 1);
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136 |
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137 | last_ordered_call = num;
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138 | }
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139 |
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140 | /// like OrderedCall, but calls itself to test nested calls
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141 | void NestedOrderedCall(int from, int to)
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142 | {
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143 | // check ordering
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144 | OrderedCall(from);
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145 |
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146 | // nested call
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147 | if ( from < to )
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148 | {
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149 | SystemQueue::instance().scheduleCall(
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150 | boost::bind(&SystemQueueTest::NestedOrderedCall,
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151 | this,
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152 | from+1,
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153 | to)
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154 | );
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155 | }
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156 | else
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157 | {
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158 | /// XXX because the current/old SystemQueue does not pass the Threading test,
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159 | /// we have to signal, that when all nested calls are finished,
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160 | /// so we need to set the checkmark here..
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161 |
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162 | checkmark = true;
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163 | }
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164 | }
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165 |
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166 | bool checkmark;
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167 | int last_ordered_call;
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168 | };
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169 |
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170 |
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171 | /**
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172 | * Enqueues an event but then cancels the SystemQueue without running
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173 | */
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174 | TEST_F(SystemQueueTest, EmptyAfterCancel)
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175 | {
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176 | SystemQueue& sysq = SystemQueue::instance();
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177 |
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178 | EXPECT_TRUE( sysq.isEmpty() );
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179 |
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180 | // enqueue event
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181 | sysq.scheduleCall(
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182 | boost::bind(&SystemQueueTest::Check, this)
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183 | );
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184 |
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185 | EXPECT_FALSE( sysq.isEmpty() );
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186 |
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187 | // cancel
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188 | sysq.cancel();
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189 |
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190 | EXPECT_TRUE( sysq.isEmpty() );
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191 | }
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192 |
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193 |
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194 | /**
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195 | * cancels the SystemQueue from inside a scheduled event
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196 | */
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197 | TEST_F(SystemQueueTest, CancelFromInsideEvent)
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198 | {
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199 | SystemQueue& sysq = SystemQueue::instance();
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200 | checkmark = false; // just to be sure..
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201 |
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202 | // start
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203 | sysq.run();
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204 |
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205 | // scheduleCall
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206 | sysq.scheduleCall(
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207 | boost::bind(&SystemQueueTest::Cancel, this)
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208 | );
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209 |
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210 | // wait for the event to happen
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211 | wait_for_checkmark(MAX_WAIT);
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212 |
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213 | EXPECT_FALSE( sysq.isRunning() ) << "SystemQueue has not stopped properly.";
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214 | EXPECT_TRUE( sysq.isEmpty() ) << "SystemQueue has not stopped properly.";
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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 | * schedule a call and test whether it is actually performed by the SystemQueue
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220 | */
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221 | TEST_F(SystemQueueTest, ScheduleCall)
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222 | {
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223 | SystemQueue& sysq = SystemQueue::instance();
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224 | checkmark = false; // just to be sure..
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225 |
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226 | // start
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227 | sysq.run();
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228 |
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229 | // scheduleCall
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230 | sysq.scheduleCall(
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231 | boost::bind(&SystemQueueTest::Check, this)
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232 | );
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233 |
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234 | // wait for the event to happen
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235 | wait_for_checkmark(MAX_WAIT);
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236 |
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237 | // stop
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238 | sysq.cancel();
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239 |
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240 | EXPECT_TRUE( checkmark ) << "Function was not called within " << MAX_WAIT << " microseconds.";
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241 | }
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242 |
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243 |
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244 | /**
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245 | * This test actually tests two things [sorry, but it's hard to test them separately!]
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246 | *
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247 | * - first: the SystemQueue should not consider itself empty, while an event is processed
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248 | * - second: SystemQueue events should be processed in parallel to the main thread
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249 | *
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250 | * NOTE: The timings here are not obvious, maybe they have to be adjusted on very slow machines
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251 | *
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252 | * NOTE: !! The current/old SystemQueue does NOT pass this test!!
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253 | *
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254 | * That's also why we need the unhandy wait_for_checkmark function,
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255 | * instead a wait_until_empty function.
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256 | */
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257 | TEST_F(SystemQueueTest, Threading)
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258 | {
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259 | SystemQueue& sysq = SystemQueue::instance();
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260 | checkmark = false; // just to be sure..
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261 |
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262 | // start
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263 | sysq.run();
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264 |
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265 | // scheduleCall
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266 | sysq.scheduleCall(
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267 | boost::bind(&SystemQueueTest::LongRunner, this)
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268 | );
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269 |
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270 | // SystemQueue must not be empty as long as the event is not finished
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271 | if ( sysq.isEmpty() )
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272 | {
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273 | // assert that this test is actually meaningful
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274 | ASSERT_FALSE( checkmark )
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275 | << "NOTE: This is not necessarily a bug, maybe the timing just have to adjusted. Try to increase MAX_WAIT.";
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276 |
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277 | EXPECT_TRUE( ! sysq.isEmpty() || checkmark );
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278 | }
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279 |
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280 | // wait for the event to finish
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281 | wait_for_checkmark(MAX_WAIT);
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282 |
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283 | // stop
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284 | sysq.cancel();
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285 |
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286 | // even the long-runner should finally finish
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287 | EXPECT_TRUE( checkmark ) << "Function has not finished within " << MAX_WAIT << " microseconds.";
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288 | }
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289 |
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290 | /**
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291 | * schedule multiple calls
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292 | *
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293 | * each call must be performed, in the correct order
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294 | *
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295 | * NOTE: The nested calls are not necessarily in order with calls scheduled from the main thread,
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296 | * that's fine, therefore we make sure the nested calls are done, before scheduling new ones.
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297 | */
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298 | TEST_F(SystemQueueTest, MultipleCalls)
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299 | {
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300 | SystemQueue& sysq = SystemQueue::instance();
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301 |
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302 | // start
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303 | sysq.run();
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304 |
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305 | sysq.scheduleCall( boost::bind(&SystemQueueTest::OrderedCall, this, 1) );
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306 | sysq.scheduleCall( boost::bind(&SystemQueueTest::OrderedCall, this, 2) );
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307 | sysq.scheduleCall( boost::bind(&SystemQueueTest::NestedOrderedCall, this, 3, 5) );
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308 |
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309 | // make sure all nested calls are done
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310 | wait_for_checkmark(MAX_WAIT); // XXX should be "wait_until_empty() ...."
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311 |
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312 | checkmark = false;
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313 | sysq.scheduleCall( boost::bind(&SystemQueueTest::OrderedCall, this, 6) );
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314 |
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315 | // XXX same here... [ wait_until_empty() ]
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316 | sysq.scheduleCall( boost::bind(&SystemQueueTest::Check, this) );
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317 | wait_for_checkmark(MAX_WAIT);
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318 |
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319 | // evaluation
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320 | EXPECT_EQ( 6, last_ordered_call);
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321 |
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322 | // stop
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323 | sysq.cancel();
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324 | }
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325 |
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326 |
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327 |
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328 | /**
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329 | * This subclass has some special member functions suitable for timing tests
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330 | *
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331 | * NOTE: Timing tests are not always reproducable.. sorry. :-/
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332 | */
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333 | class SystemQueueTimingTest :
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334 | public SystemQueueTest
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335 | {
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336 | public:
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337 |
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338 | /**
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339 | * typical delay time
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340 | *
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341 | * should be long enough for meaningful tests,
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342 | * but should not lengthen the test excessivly
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343 | */
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344 | #define DELAY_TIME 20 // ms
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345 | #define DELAY_MARGIN 2000 // microseconds (1/1000 ms) // TODO maybe this is too much..
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346 |
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347 |
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348 | /// constructor
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349 | SystemQueueTimingTest() :
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350 | SystemQueueTest() /* super constructor */,
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351 | sysq( SystemQueue::instance() ),
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352 | calls(0)
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353 | {
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354 | }
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355 |
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356 | virtual void SetUp()
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357 | {
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358 | // start SystemQueue
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359 | sysq.run();
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360 | }
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361 |
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362 |
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363 | virtual void TearDown()
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364 | {
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365 | // stop SystemQueue
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366 | sysq.cancel();
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367 | }
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368 |
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369 |
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370 | /**
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371 | * @param placed_in_queue The time (as ptime) when this event is put into the delay queue
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372 | * @param intended_sleep_time The time (in microseconds) the event is supposed to sleep in the queue
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373 | * @param margin The acceptable margin (in microseconds)
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374 | */
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375 | void TimeCheckingCall(ptime placed_in_queue, uint64_t intended_sleep_time, uint64_t margin)
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376 | {
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377 | ptime called_at = microsec_clock::local_time();
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378 |
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379 | // calculate actual sleep time and difference to intended sleep time
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380 | boost::posix_time::time_duration actual_sleep_time = called_at - placed_in_queue;
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381 | uint64_t diff = actual_sleep_time.total_microseconds() - intended_sleep_time;
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382 |
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383 | // info
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384 | cout << "### Timing difference: " << diff << " microseconds" << endl;
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385 |
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386 | EXPECT_LT( abs(diff), margin );
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387 |
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388 | calls++;
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389 | checkmark = true;
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390 | }
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391 |
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392 | SystemQueue& sysq;
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393 | int calls;
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394 | };
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395 |
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396 |
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397 | /**
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398 | * schedules a delayed call and tests whether it is called (more or less timely..)
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399 | */
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400 | TEST_F(SystemQueueTimingTest, DelayedCall)
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401 | {
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402 | // scheduleCall
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403 | sysq.scheduleCall(
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404 | boost::bind(&SystemQueueTimingTest::Check, this), DELAY_TIME
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405 | );
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406 |
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407 | // noting to do until the delay is up..
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408 | usleep(DELAY_TIME*1000 + DELAY_MARGIN*10); // XXX margin too high (TODO lower when SysQ is reimplemented)
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409 |
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410 | // wait for the event to happen
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411 | wait_for_checkmark(MAX_WAIT);
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412 |
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413 | EXPECT_TRUE( checkmark ) << "Delayed function was not called within delaytime ("
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414 | << DELAY_TIME << " ms) + " << (MAX_WAIT + DELAY_MARGIN) << " microseconds.";
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415 | }
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416 |
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417 |
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418 | /**
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419 | * tests whether the SystemQueue is considered non-empty, while an event is delayed-waiting
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420 | */
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421 | TEST_F(SystemQueueTimingTest, NotEmptyWhileWaiting)
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422 | {
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423 | // scheduleCall
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424 | sysq.scheduleCall(
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425 | boost::bind(&SystemQueueTimingTest::Check, this), DELAY_TIME
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426 | );
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427 |
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428 | // SystemQueue must not be empty as long as the event is not finished (and especially while stille queued)
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429 | if ( sysq.isEmpty() )
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430 | {
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431 | // assert that this test is actually meaningful
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432 | ASSERT_FALSE( checkmark )
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433 | << "NOTE: This is not necessarily a bug, maybe the timing just have to adjusted. Try to increase MAX_WAIT.";
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434 |
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435 | EXPECT_TRUE( ! sysq.isEmpty() || checkmark );
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436 | }
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437 | }
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438 |
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439 |
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440 |
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441 | /**
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442 | * schedules a delayed call and tests whether it is called (more or less timely..)
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443 | */
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444 | TEST_F(SystemQueueTimingTest, MultipleCalls)
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445 | {
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446 | // schedule 4th call
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447 | sysq.scheduleCall(
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448 | boost::bind(&SystemQueueTest::OrderedCall, this, 4),
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449 | DELAY_TIME*3
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450 | );
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451 |
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452 | // schedule 2nd call
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453 | sysq.scheduleCall(
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454 | boost::bind(&SystemQueueTest::OrderedCall, this, 2),
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455 | DELAY_TIME*1
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456 | );
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457 |
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458 | // schedule 3rd call
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459 | sysq.scheduleCall(
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460 | boost::bind(&SystemQueueTest::OrderedCall, this, 3),
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461 | DELAY_TIME*2
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462 | );
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463 |
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464 | // schedule 1st call (without delay)
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465 | sysq.scheduleCall(
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466 | boost::bind(&SystemQueueTest::OrderedCall, this, 1)
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467 | );
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468 |
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469 |
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470 | // XXX the usual bug..
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471 | sysq.scheduleCall(
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472 | boost::bind(&SystemQueueTimingTest::Check, this),
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473 | DELAY_TIME*4
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474 | );
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475 |
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476 | // noting to do until the delay is up..
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477 | usleep(DELAY_TIME * 4000 + DELAY_MARGIN*100); // XXX margin too high
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478 |
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479 | // wait for the event to happen
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480 | wait_for_checkmark(MAX_WAIT);
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481 |
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482 | // evaluation
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483 | EXPECT_EQ( 4, last_ordered_call);
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484 | }
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485 |
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486 |
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487 | /**
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488 | * Schedules a delayed call and test whether the sleep time is acurate
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489 | */
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490 | TEST_F(SystemQueueTimingTest, TimingSingleCall)
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491 | {
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492 | ptime now = microsec_clock::local_time();
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493 |
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494 | sysq.scheduleCall(
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495 | boost::bind(&SystemQueueTimingTest::TimeCheckingCall, this,
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496 | now, DELAY_TIME*1000, DELAY_MARGIN),
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497 | DELAY_TIME
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498 | );
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499 |
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500 | // main thread is going to sleep..
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501 | usleep(DELAY_TIME * 1000 + DELAY_MARGIN * 2);
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502 | wait_for_checkmark(MAX_WAIT);
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503 |
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504 | // make sure the measurement function was called at all
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505 | EXPECT_TRUE(checkmark) << "Measurement function was NOT RUN AT ALL!";
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506 | }
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507 |
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508 |
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509 | /**
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510 | * Like TimingSingleCall but tests whether the timings change when multiple events are scheduled.
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511 | */
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512 | TEST_F(SystemQueueTimingTest, TimingMultipleCalls)
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513 | {
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514 | ptime now = microsec_clock::local_time();
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515 |
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516 | sysq.scheduleCall(
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517 | boost::bind(&SystemQueueTimingTest::TimeCheckingCall, this,
|
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518 | now, DELAY_TIME*1000 * 2, DELAY_MARGIN),
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519 | DELAY_TIME * 2
|
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520 | );
|
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521 |
|
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522 | sysq.scheduleCall(
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523 | boost::bind(&SystemQueueTimingTest::TimeCheckingCall, this,
|
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524 | now, DELAY_TIME*1000 * 3, DELAY_MARGIN),
|
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525 | DELAY_TIME * 3
|
---|
526 | );
|
---|
527 |
|
---|
528 | sysq.scheduleCall(
|
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529 | boost::bind(&SystemQueueTimingTest::TimeCheckingCall, this,
|
---|
530 | now, DELAY_TIME*1000, DELAY_MARGIN),
|
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531 | DELAY_TIME
|
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532 | );
|
---|
533 |
|
---|
534 | // main thread is going to sleep..
|
---|
535 | usleep(DELAY_TIME * 3000 + DELAY_MARGIN * 2);
|
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536 | wait_for_checkmark(MAX_WAIT); // XXX wait_until_empty
|
---|
537 |
|
---|
538 | // make sure the measurement function was called at all
|
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539 | EXPECT_EQ(3, calls) << "Not every event was performed..";
|
---|
540 | }
|
---|
541 |
|
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542 |
|
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543 | /*
|
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544 | * TODO
|
---|
545 | *
|
---|
546 | * maybe one more complicated testcall with timing and directly scheduled events
|
---|
547 | *
|
---|
548 | * but this probably only makes sense after a working SysQ implementation exists..
|
---|
549 | */
|
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