tests/events/stopwatch.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        tests/events/stopwatch.cpp
   3 // Purpose:     Test wxStopWatch class
   4 // Author:      Francesco Montorsi (extracted from console sample)
   5 // Created:     2010-05-16
   6 // Copyright:   (c) 2010 wxWidgets team
   7 ///////////////////////////////////////////////////////////////////////////////
   8
   9
  10 // ----------------------------------------------------------------------------
  11 // headers
  12 // ----------------------------------------------------------------------------
  13
  14 #include "testprec.h"
  15
  16 #ifdef __BORLANDC__
  17     #pragma hdrstop
  18 #endif
  19
  20 #ifndef WX_PRECOMP
  21 #endif // WX_PRECOMP
  22
  23 #include <time.h>
  24
  25 #include "wx/stopwatch.h"
  26 #include "wx/utils.h"
  27
  28 namespace
  29 {
  30
  31 const long tolerance = 50;  // in ms
  32 const int sleepTime = 500;
  33
  34 } // anonymous namespace
  35
  36 // --------------------------------------------------------------------------
  37 // test class
  38 // --------------------------------------------------------------------------
  39
  40 class StopWatchTestCase : public CppUnit::TestCase
  41 {
  42 public:
  43     StopWatchTestCase() {}
  44
  45 private:
  46     CPPUNIT_TEST_SUITE( StopWatchTestCase );
  47         CPPUNIT_TEST( Misc );
  48         CPPUNIT_TEST( BackwardsClockBug );
  49         CPPUNIT_TEST( RestartBug );
  50     CPPUNIT_TEST_SUITE_END();
  51
  52     void Misc();
  53     void BackwardsClockBug();
  54     void RestartBug();
  55
  56     DECLARE_NO_COPY_CLASS(StopWatchTestCase)
  57 };
  58
  59 // register in the unnamed registry so that these tests are run by default
  60 CPPUNIT_TEST_SUITE_REGISTRATION( StopWatchTestCase );
  61
  62 // also include in its own registry so that these tests can be run alone
  63 CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( StopWatchTestCase, "StopWatchTestCase" );
  64
  65 void StopWatchTestCase::Misc()
  66 {
  67     wxStopWatch sw;
  68     long t;
  69     wxLongLong usec;
  70
  71     sw.Pause();         // pause it immediately
  72
  73     // verify that almost no time elapsed
  74     usec = sw.TimeInMicro();
  75     WX_ASSERT_MESSAGE
  76     (
  77         ("Elapsed time was %" wxLongLongFmtSpec "dus", usec),
  78         usec < tolerance*1000
  79     );
  80
  81     wxSleep(1);
  82     t = sw.Time();
  83
  84     // check that the stop watch doesn't advance while paused
  85     WX_ASSERT_MESSAGE
  86     (
  87         ("Actual time value is %ld", t),
  88         t >= 0 && t < tolerance
  89     );
  90
  91     sw.Resume();
  92     wxMilliSleep(sleepTime);
  93     t = sw.Time();
  94     // check that it did advance now by ~1.5s
  95     WX_ASSERT_MESSAGE
  96     (
  97         ("Actual time value is %ld", t),
  98         t > sleepTime - tolerance && t < sleepTime + tolerance
  99     );
 100
 101     sw.Pause();
 102
 103     // check that this sleep won't be taken into account below
 104     wxMilliSleep(sleepTime);
 105     sw.Resume();
 106
 107     wxMilliSleep(sleepTime);
 108     t = sw.Time();
 109
 110     // and it should advance again
 111     WX_ASSERT_MESSAGE
 112     (
 113         ("Actual time value is %ld", t),
 114         t > 2*sleepTime - tolerance && t < 2*sleepTime + tolerance
 115     );
 116 }
 117
 118 void StopWatchTestCase::BackwardsClockBug()
 119 {
 120     wxStopWatch sw;
 121     wxStopWatch sw2;
 122
 123     for ( size_t n = 0; n < 10; n++ )
 124     {
 125         sw2.Start();
 126
 127         for ( size_t m = 0; m < 10000; m++ )
 128         {
 129             CPPUNIT_ASSERT ( sw.Time() >= 0 && sw2.Time() >= 0 );
 130         }
 131     }
 132 }
 133
 134 void StopWatchTestCase::RestartBug()
 135 {
 136     wxStopWatch sw;
 137     sw.Pause();
 138
 139     // Calling Start() should resume the stopwatch if it was paused.
 140     static const int offset = 5000;
 141     sw.Start(offset);
 142     wxMilliSleep(sleepTime);
 143
 144     long t = sw.Time();
 145     WX_ASSERT_MESSAGE
 146     (
 147         ("Actual time value is %ld", t),
 148         t > offset + sleepTime - tolerance &&
 149             t < offset + sleepTime + tolerance
 150     );
 151 }