xpcom/tests/TestTimeStamp.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* ***** BEGIN LICENSE BLOCK *****
   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   4  *
   5  * The contents of this file are subject to the Mozilla Public License Version
   6  * 1.1 (the "License"); you may not use this file except in compliance with
   7  * the License. You may obtain a copy of the License at
   8  * http://www.mozilla.org/MPL/
   9  *
  10  * Software distributed under the License is distributed on an "AS IS" basis,
  11  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  12  * for the specific language governing rights and limitations under the
  13  * License.
  14  *
  15  * The Original Code is XPCOM TimeStamp tests.
  16  *
  17  * The Initial Developer of the Original Code is Mozilla Foundation.
  18  * Portions created by the Initial Developer are Copyright (C) 2009
  19  * the Initial Developer. All Rights Reserved.
  20  *
  21  * Contributor(s):
  22  *   robert@ocallahan.org
  23  *
  24  * Alternatively, the contents of this file may be used under the terms of
  25  * either the GNU General Public License Version 2 or later (the "GPL"), or
  26  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  27  * in which case the provisions of the GPL or the LGPL are applicable instead
  28  * of those above. If you wish to allow use of your version of this file only
  29  * under the terms of either the GPL or the LGPL, and not to allow others to
  30  * use your version of this file under the terms of the MPL, indicate your
  31  * decision by deleting the provisions above and replace them with the notice
  32  * and other provisions required by the GPL or the LGPL. If you do not delete
  33  * the provisions above, a recipient may use your version of this file under
  34  * the terms of any one of the MPL, the GPL or the LGPL.
  35  *
  36  * ***** END LICENSE BLOCK ***** */
  37
  38 #include "mozilla/TimeStamp.h"
  39
  40 #include "TestHarness.h"
  41
  42 #include "prinrval.h"
  43 #include "prthread.h"
  44
  45 using mozilla::TimeStamp;
  46 using mozilla::TimeDuration;
  47
  48 static void Assert(PRBool aCond, const char* aMsg)
  49 {
  50     if (aCond) {
  51         passed(aMsg);
  52     } else {
  53         fail("%s", aMsg);
  54     }
  55 }
  56
  57 int main(int argc, char** argv)
  58 {
  59     ScopedXPCOM xpcom("nsTimeStamp");
  60     if (xpcom.failed())
  61         return 1;
  62
  63     TimeDuration td;
  64     Assert(td.ToSeconds() == 0.0, "TimeDuration default value 0");
  65     Assert(TimeDuration::FromSeconds(5).ToSeconds() == 5.0,
  66            "TimeDuration FromSeconds/ToSeconds round-trip");
  67     Assert(TimeDuration::FromMilliseconds(5000).ToSeconds() == 5.0,
  68            "TimeDuration FromMilliseconds/ToSeconds round-trip");
  69     Assert(TimeDuration::FromSeconds(1) < TimeDuration::FromSeconds(2),
  70            "TimeDuration < operator works");
  71     Assert(!(TimeDuration::FromSeconds(1) < TimeDuration::FromSeconds(1)),
  72            "TimeDuration < operator works");
  73     Assert(TimeDuration::FromSeconds(2) > TimeDuration::FromSeconds(1),
  74            "TimeDuration > operator works");
  75     Assert(!(TimeDuration::FromSeconds(1) > TimeDuration::FromSeconds(1)),
  76            "TimeDuration > operator works");
  77     Assert(TimeDuration::FromSeconds(1) <= TimeDuration::FromSeconds(2),
  78            "TimeDuration <= operator works");
  79     Assert(TimeDuration::FromSeconds(1) <= TimeDuration::FromSeconds(1),
  80            "TimeDuration <= operator works");
  81     Assert(!(TimeDuration::FromSeconds(2) <= TimeDuration::FromSeconds(1)),
  82            "TimeDuration <= operator works");
  83     Assert(TimeDuration::FromSeconds(2) >= TimeDuration::FromSeconds(1),
  84            "TimeDuration >= operator works");
  85     Assert(TimeDuration::FromSeconds(1) >= TimeDuration::FromSeconds(1),
  86            "TimeDuration >= operator works");
  87     Assert(!(TimeDuration::FromSeconds(1) >= TimeDuration::FromSeconds(2)),
  88            "TimeDuration >= operator works");
  89
  90     TimeStamp ts;
  91     Assert(ts.IsNull(), "Default TimeStamp value null");
  92
  93     ts = TimeStamp::Now();
  94     Assert(!ts.IsNull(), "TimeStamp time value non-null");
  95     Assert((ts - ts).ToSeconds() == 0.0, "TimeStamp zero-length duration");
  96
  97     PR_Sleep(PR_SecondsToInterval(2));
  98
  99     TimeStamp ts2(TimeStamp::Now());
 100     Assert(ts2 > ts, "TimeStamp > comparison");
 101     Assert(!(ts > ts), "TimeStamp > comparison");
 102     Assert(ts < ts2, "TimeStamp < comparison");
 103     Assert(!(ts < ts), "TimeStamp < comparison");
 104     Assert(ts <= ts2, "TimeStamp <= comparison");
 105     Assert(ts <= ts, "TimeStamp <= comparison");
 106     Assert(!(ts2 <= ts), "TimeStamp <= comparison");
 107     Assert(ts2 >= ts, "TimeStamp >= comparison");
 108     Assert(ts2 >= ts, "TimeStamp >= comparison");
 109     Assert(!(ts >= ts2), "TimeStamp >= comparison");
 110
 111     // We can't be sure exactly how long PR_Sleep slept for. It should have
 112     // slept for at least one second. We might have slept a lot longer due
 113     // to process scheduling, but hopefully not more than 10 seconds.
 114     td = ts2 - ts;
 115     Assert(td.ToSeconds() > 1.0, "TimeStamp difference lower bound");
 116     Assert(td.ToSeconds() < 20.0, "TimeStamp difference upper bound");
 117     td = ts - ts2;
 118     Assert(td.ToSeconds() < -1.0, "TimeStamp negative difference lower bound");
 119     Assert(td.ToSeconds() > -20.0, "TimeStamp negative difference upper bound");
 120
 121     double resolution = TimeDuration::Resolution().ToSecondsSigDigits();
 122     printf(" (platform timer resolution is ~%g s)\n", resolution);
 123     Assert(0.000000001 < resolution, "Time resolution is sane");
 124     // Don't upper-bound sanity check ... although NSPR reports 1ms
 125     // resolution, it might be lying, so we shouldn't compare with it
 126
 127     return gFailCount > 0;
 128 }