ceph/src/jaegertracing/opentracing-cpp/test/util_test.cpp

   1 #include <opentracing/util.h>
   2 #include <cmath>
   3 #include <cstdlib>  // Work around to https://stackoverflow.com/a/30084734.
   4 using namespace opentracing;
   5
   6 #define CATCH_CONFIG_MAIN
   7 #include <opentracing/catch2/catch.hpp>
   8
   9 TEST_CASE("convert_time_point") {
  10   SECTION("We can convert between time points of different clocks") {
  11     // Check that converting from a system_clock time_point to a steady_clock
  12     // time point and then back again produces approximately the same
  13     // system_clock time_point.
  14     auto t1 = SystemClock::now();
  15     auto t2 = convert_time_point<SteadyClock>(t1);
  16     auto t3 = convert_time_point<SystemClock>(t2);
  17     auto difference = std::abs(
  18         std::chrono::duration_cast<std::chrono::microseconds>(t3 - t1).count());
  19     CHECK(difference < 100);
  20   }
  21
  22   SECTION("Converting times from the same clock gives the identity") {
  23     auto t = SystemClock::now();
  24     CHECK(t == convert_time_point<SystemClock>(t));
  25   }
  26 }