llvm/unittests/Support/TimeValueTest.cpp
Pavel Labath 911bb941ce Reapply "Add Chrono.h - std::chrono support header"
This is a resubmission of r284590. The mingw build should be fixed now. The
problem was we were matching time_t with _localtime_64s, which was incorrect on
_USE_32BIT_TIME_T systems. Instead I use localtime_s, which should always
evaluate to the correct function.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284720 91177308-0d34-0410-b5e6-96231b3b80d8
2016-10-20 12:05:50 +00:00

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1.3 KiB
C++

//===- llvm/unittest/Support/TimeValueTest.cpp - Time Value tests ---------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "gtest/gtest.h"
#include "llvm/Support/TimeValue.h"
#include <time.h>
using namespace llvm;
namespace {
TEST(TimeValue, time_t) {
sys::TimeValue now = sys::TimeValue::now();
time_t now_t = time(nullptr);
EXPECT_TRUE(std::abs(static_cast<long>(now_t - now.toEpochTime())) < 2);
}
TEST(TimeValue, Win32FILETIME) {
uint64_t epoch_as_filetime = 0x19DB1DED53E8000ULL;
uint32_t ns = 765432100;
sys::TimeValue epoch;
// FILETIME has 100ns of intervals.
uint64_t ft1970 = epoch_as_filetime + ns / 100;
epoch.fromWin32Time(ft1970);
// The "seconds" part in Posix time may be expected as zero.
EXPECT_EQ(0u, epoch.toEpochTime());
EXPECT_EQ(ns, static_cast<uint32_t>(epoch.nanoseconds()));
// Confirm it reversible.
EXPECT_EQ(ft1970, epoch.toWin32Time());
}
TEST(TimeValue, Chrono) {
sys::TimeValue TV;
TV.fromEpochTime(0);
sys::TimePoint<> TP = TV;
EXPECT_EQ(0u, sys::toTimeT(TP));
TP += std::chrono::seconds(47);
TV = TP;
EXPECT_EQ(47u, TV.toEpochTime());
}
}