Utilities/test/HRTime_t.cpp

0001
0002 #include "FWCore/Utilities/interface/HRRealTime.h"
0003
0004 #include <ctime>
0005 #include <cmath>
0006 #include <typeinfo>
0007 #include <iostream>
0008
0009 #include <Utilities/Testing/interface/CppUnit_testdriver.icpp>
0010 #include <cppunit/extensions/HelperMacros.h>
0011
0012 namespace {
0013
0014   double gcrap = 0;
0015   void waiste() {
0016     for (double i = 1; i < 100000; i++)
0017       gcrap += std::log(std::sqrt(i));
0018   }
0019 }  // namespace
0020
0021 // FIXME
0022 // I would have preferred check by features....
0023 class TestTimers : public CppUnit::TestFixture {
0024   CPPUNIT_TEST_SUITE(TestTimers);
0025   CPPUNIT_TEST(check_stdclock);
0026   CPPUNIT_TEST(check_RealTime);
0027   CPPUNIT_TEST_SUITE_END();
0028
0029 public:
0030   void setUp() {}
0031   void tearDown() {}
0032   void check_stdclock();
0033   void check_RealTime();
0034 };
0035
0036 CPPUNIT_TEST_SUITE_REGISTRATION(TestTimers);
0037
0038 template <typename S>
0039 void checkTime(S source, bool hr) {
0040   //  typedef typename boost::function_traits<S>::result_type T;
0041   // typedef typename boost::function_types::result_type<S>::type T;
0042   typedef edm::HRTimeDiffType T;
0043
0044   T i = source();
0045
0046   CPPUNIT_ASSERT(!(i < 0));
0047
0048   // source()-source()  it seems that this may be negative...
0049
0050   waiste();
0051
0052   T a = source();
0053   T b = source();
0054   CPPUNIT_ASSERT(!((a - i) < 0));
0055   CPPUNIT_ASSERT(!((b - a) < 0));
0056   if (hr)
0057     CPPUNIT_ASSERT(a > i);  // not obvious if low resolution
0058
0059   waiste();
0060
0061   T c = source();
0062   double d = double(source() - c);
0063   CPPUNIT_ASSERT(!(d < 0));
0064
0065   T e = source();
0066   CPPUNIT_ASSERT(!((c - i) < (b - i)));
0067   CPPUNIT_ASSERT(!((e - i) < (c - i)));
0068   if (hr)
0069     CPPUNIT_ASSERT((e - i) > (b - i));  // not obvious if low resolution...
0070 }
0071
0072 #define CHECKTIME(S, HR)                              \
0073   std::cout << "checking source " << #S << std::endl; \
0074   checkTime(&S, HR)
0075
0076 void TestTimers::check_stdclock() { CHECKTIME(std::clock, false); }
0077
0078 void TestTimers::check_RealTime() { CHECKTIME(edm::hrRealTime, true); }