llvm/unittests/Support/Chrono.cpp

   1 //===- llvm/unittest/Support/Chrono.cpp - Time utilities tests ------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/Support/Chrono.h"
  10 #include "llvm/ADT/SmallVector.h"
  11 #include "llvm/Support/FormatVariadic.h"
  12 #include "gtest/gtest.h"
  13
  14 using namespace llvm;
  15 using namespace llvm::sys;
  16 using namespace std::chrono;
  17
  18 namespace {
  19
  20 TEST(Chrono, TimeTConversion) {
  21   EXPECT_EQ(time_t(0), toTimeT(toTimePoint(time_t(0))));
  22   EXPECT_EQ(time_t(1), toTimeT(toTimePoint(time_t(1))));
  23   EXPECT_EQ(time_t(47), toTimeT(toTimePoint(time_t(47))));
  24
  25   TimePoint<> TP;
  26   EXPECT_EQ(TP, toTimePoint(toTimeT(TP)));
  27   TP += seconds(1);
  28   EXPECT_EQ(TP, toTimePoint(toTimeT(TP)));
  29   TP += hours(47);
  30   EXPECT_EQ(TP, toTimePoint(toTimeT(TP)));
  31 }
  32
  33 TEST(Chrono, TimePointFormat) {
  34   using namespace std::chrono;
  35   struct tm TM {};
  36   TM.tm_year = 106;
  37   TM.tm_mon = 0;
  38   TM.tm_mday = 2;
  39   TM.tm_hour = 15;
  40   TM.tm_min = 4;
  41   TM.tm_sec = 5;
  42   TM.tm_isdst = -1;
  43   TimePoint<> T =
  44       system_clock::from_time_t(mktime(&TM)) + nanoseconds(123456789);
  45
  46   // operator<< uses the format YYYY-MM-DD HH:MM:SS.NNNNNNNNN
  47   std::string S;
  48   raw_string_ostream OS(S);
  49   OS << T;
  50   EXPECT_EQ("2006-01-02 15:04:05.123456789", OS.str());
  51
  52   // formatv default style matches operator<<.
  53   EXPECT_EQ("2006-01-02 15:04:05.123456789", formatv("{0}", T).str());
  54   // formatv supports strftime-style format strings.
  55   EXPECT_EQ("15:04:05", formatv("{0:%H:%M:%S}", T).str());
  56   // formatv supports our strftime extensions for sub-second precision.
  57   EXPECT_EQ("123", formatv("{0:%L}", T).str());
  58   EXPECT_EQ("123456", formatv("{0:%f}", T).str());
  59   EXPECT_EQ("123456789", formatv("{0:%N}", T).str());
  60   // our extensions don't interfere with %% escaping.
  61   EXPECT_EQ("%foo", formatv("{0:%%foo}", T).str());
  62 }
  63
  64 // Test that toTimePoint and toTimeT can be called with a arguments with varying
  65 // precisions.
  66 TEST(Chrono, ImplicitConversions) {
  67   std::time_t TimeT = 47;
  68   TimePoint<seconds> Sec = toTimePoint(TimeT);
  69   TimePoint<milliseconds> Milli = toTimePoint(TimeT);
  70   TimePoint<microseconds> Micro = toTimePoint(TimeT);
  71   TimePoint<nanoseconds> Nano = toTimePoint(TimeT);
  72   EXPECT_EQ(Sec, Milli);
  73   EXPECT_EQ(Sec, Micro);
  74   EXPECT_EQ(Sec, Nano);
  75   EXPECT_EQ(TimeT, toTimeT(Sec));
  76   EXPECT_EQ(TimeT, toTimeT(Milli));
  77   EXPECT_EQ(TimeT, toTimeT(Micro));
  78   EXPECT_EQ(TimeT, toTimeT(Nano));
  79 }
  80
  81 TEST(Chrono, DurationFormat) {
  82   EXPECT_EQ("1 h", formatv("{0}", hours(1)).str());
  83   EXPECT_EQ("1 m", formatv("{0}", minutes(1)).str());
  84   EXPECT_EQ("1 s", formatv("{0}", seconds(1)).str());
  85   EXPECT_EQ("1 ms", formatv("{0}", milliseconds(1)).str());
  86   EXPECT_EQ("1 us", formatv("{0}", microseconds(1)).str());
  87   EXPECT_EQ("1 ns", formatv("{0}", nanoseconds(1)).str());
  88
  89   EXPECT_EQ("1 s", formatv("{0:+}", seconds(1)).str());
  90   EXPECT_EQ("1", formatv("{0:-}", seconds(1)).str());
  91
  92   EXPECT_EQ("1000 ms", formatv("{0:ms}", seconds(1)).str());
  93   EXPECT_EQ("1000000 us", formatv("{0:us}", seconds(1)).str());
  94   EXPECT_EQ("1000", formatv("{0:ms-}", seconds(1)).str());
  95
  96   EXPECT_EQ("1,000 ms", formatv("{0:+n}", milliseconds(1000)).str());
  97   EXPECT_EQ("0x3e8", formatv("{0:-x}", milliseconds(1000)).str());
  98   EXPECT_EQ("010", formatv("{0:-3}", milliseconds(10)).str());
  99   EXPECT_EQ("10,000", formatv("{0:ms-n}", seconds(10)).str());
 100
 101   EXPECT_EQ("1.00 s", formatv("{0}", duration<float>(1)).str());
 102   EXPECT_EQ("0.123 s", formatv("{0:+3}", duration<float>(0.123f)).str());
 103   EXPECT_EQ("1.230e-01 s", formatv("{0:+e3}", duration<float>(0.123f)).str());
 104
 105   typedef duration<float, std::ratio<60 * 60 * 24 * 14, 1000000>>
 106       microfortnights;
 107   EXPECT_EQ("1.00", formatv("{0:-}", microfortnights(1)).str());
 108   EXPECT_EQ("1209.60 ms", formatv("{0:ms}", microfortnights(1)).str());
 109 }
 110
 111 } // anonymous namespace