1//===- llvm/unittest/Support/TimeValueTest.cpp - Time Value tests ---------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "gtest/gtest.h"
11#include "llvm/Support/TimeValue.h"
12#include <time.h>
13
14using namespace llvm;
15namespace {
16
17TEST(TimeValue, time_t) {
18  sys::TimeValue now = sys::TimeValue::now();
19  time_t now_t = time(nullptr);
20  EXPECT_TRUE(std::abs(static_cast<long>(now_t - now.toEpochTime())) < 2);
21}
22
23TEST(TimeValue, Win32FILETIME) {
24  uint64_t epoch_as_filetime = 0x19DB1DED53E8000ULL;
25  uint32_t ns = 765432100;
26  sys::TimeValue epoch;
27
28  // FILETIME has 100ns of intervals.
29  uint64_t ft1970 = epoch_as_filetime + ns / 100;
30  epoch.fromWin32Time(ft1970);
31
32  // The "seconds" part in Posix time may be expected as zero.
33  EXPECT_EQ(0u, epoch.toEpochTime());
34  EXPECT_EQ(ns, static_cast<uint32_t>(epoch.nanoseconds()));
35
36  // Confirm it reversible.
37  EXPECT_EQ(ft1970, epoch.toWin32Time());
38}
39
40}
41