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#include "FWCore/Utilities/interface/HRRealTime.h"
#include <ctime>
#include <cmath>
#include <typeinfo>
#include <iostream>
#include <catch.hpp>
namespace {
double gcrap = 0;
void waiste() {
for (double i = 1; i < 100000; i++)
gcrap += std::log(std::sqrt(i));
}
} // namespace
// Helper for timing checks
// Replace CppUnit assertions with Catch2 REQUIRE
template <typename S>
void checkTime(S source, bool hr) {
typedef edm::HRTimeDiffType T;
T i = source();
REQUIRE(!(i < 0));
waiste();
T a = source();
T b = source();
REQUIRE(!((a - i) < 0));
REQUIRE(!((b - a) < 0));
if (hr)
REQUIRE(a > i); // not obvious if low resolution
waiste();
T c = source();
double d = double(source() - c);
REQUIRE(!(d < 0));
T e = source();
REQUIRE(!((c - i) < (b - i)));
REQUIRE(!((e - i) < (c - i)));
if (hr)
REQUIRE((e - i) > (b - i)); // not obvious if low resolution...
}
TEST_CASE("HRTime", "[HRTime]") {
SECTION("stdclock") {
std::cout << "checking source std::clock" << std::endl;
checkTime(&std::clock, false);
}
SECTION("RealTime") {
std::cout << "checking source edm::hrRealTime" << std::endl;
checkTime(&edm::hrRealTime, true);
}
}
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