fmt/test/time-test.cc

// Formatting library for C++ - time formatting tests
//
// Copyright (c) 2012 - present, Victor Zverovich
// All rights reserved.
//
// For the license information refer to format.h.

#ifdef WIN32
#  define _CRT_SECURE_NO_WARNINGS
#endif

#include "fmt/time.h"
#include "fmt/locale.h"
#include "gmock.h"

TEST(TimeTest, Format) {
  std::tm tm = std::tm();
  tm.tm_year = 116;
  tm.tm_mon = 3;
  tm.tm_mday = 25;
  EXPECT_EQ("The date is 2016-04-25.",
            fmt::format("The date is {:%Y-%m-%d}.", tm));
}

TEST(TimeTest, GrowBuffer) {
  std::string s = "{:";
  for (int i = 0; i < 30; ++i) s += "%c";
  s += "}\n";
  std::time_t t = std::time(FMT_NULL);
  fmt::format(s, *std::localtime(&t));
}

TEST(TimeTest, FormatToEmptyContainer) {
  std::string s;
  auto time = std::tm();
  time.tm_sec = 42;
  fmt::format_to(std::back_inserter(s), "{:%S}", time);
  EXPECT_EQ(s, "42");
}

TEST(TimeTest, EmptyResult) { EXPECT_EQ("", fmt::format("{}", std::tm())); }

static bool EqualTime(const std::tm& lhs, const std::tm& rhs) {
  return lhs.tm_sec == rhs.tm_sec && lhs.tm_min == rhs.tm_min &&
         lhs.tm_hour == rhs.tm_hour && lhs.tm_mday == rhs.tm_mday &&
         lhs.tm_mon == rhs.tm_mon && lhs.tm_year == rhs.tm_year &&
         lhs.tm_wday == rhs.tm_wday && lhs.tm_yday == rhs.tm_yday &&
         lhs.tm_isdst == rhs.tm_isdst;
}

TEST(TimeTest, LocalTime) {
  std::time_t t = std::time(FMT_NULL);
  std::tm tm = *std::localtime(&t);
  EXPECT_TRUE(EqualTime(tm, fmt::localtime(t)));
}

TEST(TimeTest, GMTime) {
  std::time_t t = std::time(FMT_NULL);
  std::tm tm = *std::gmtime(&t);
  EXPECT_TRUE(EqualTime(tm, fmt::gmtime(t)));
}