blame: source/misc/embedded_libs/fmt-11.0.2/test/xchar-test.cc

// Formatting library for C++ - formatting library tests

//

// Copyright (c) 2012 - present, Victor Zverovich

// All rights reserved.

//

// For the license information refer to format.h.

#include "fmt/xchar.h"

#include <algorithm>

#include <complex>

#include <cwchar>

#include <vector>

#include "fmt/chrono.h"

#include "fmt/color.h"

#include "fmt/ostream.h"

#include "fmt/ranges.h"

#include "fmt/std.h"

#include "gtest-extra.h"  // Contains

#include "util.h"         // get_locale

using fmt::detail::max_value;

using testing::Contains;

#if defined(__MINGW32__) && !defined(_UCRT)

// Only C89 conversion specifiers when using MSVCRT instead of UCRT

#  define FMT_HAS_C99_STRFTIME 0

#else

#  define FMT_HAS_C99_STRFTIME 1

#endif

struct non_string {};

template <typename T> class has_to_string_view_test : public testing::Test {};

using string_char_types = testing::Types<char, wchar_t, char16_t, char32_t>;

TYPED_TEST_SUITE(has_to_string_view_test, string_char_types);

template <typename Char>

struct derived_from_string_view : fmt::basic_string_view<Char> {};

TYPED_TEST(has_to_string_view_test, has_to_string_view) {

  EXPECT_TRUE(fmt::detail::has_to_string_view<TypeParam*>::value);

  EXPECT_TRUE(fmt::detail::has_to_string_view<const TypeParam*>::value);

  EXPECT_TRUE(fmt::detail::has_to_string_view<TypeParam[2]>::value);

  EXPECT_TRUE(fmt::detail::has_to_string_view<const TypeParam[2]>::value);

  EXPECT_TRUE(

      fmt::detail::has_to_string_view<std::basic_string<TypeParam>>::value);

  EXPECT_TRUE(fmt::detail::has_to_string_view<

              fmt::basic_string_view<TypeParam>>::value);

  EXPECT_TRUE(fmt::detail::has_to_string_view<

              derived_from_string_view<TypeParam>>::value);

  using fmt_string_view = fmt::detail::std_string_view<TypeParam>;

  EXPECT_TRUE(std::is_empty<fmt_string_view>::value !=

              fmt::detail::has_to_string_view<fmt_string_view>::value);

  EXPECT_FALSE(fmt::detail::has_to_string_view<non_string>::value);

}

// std::is_constructible is broken in MSVC until version 2015.

#if !FMT_MSC_VERSION || FMT_MSC_VERSION >= 1900

struct explicitly_convertible_to_wstring_view {

  explicit operator fmt::wstring_view() const { return L"foo"; }

};

TEST(xchar_test, format_explicitly_convertible_to_wstring_view) {

  // Types explicitly convertible to wstring_view are not formattable by

  // default because it may introduce ODR violations.

  static_assert(

      !fmt::is_formattable<explicitly_convertible_to_wstring_view>::value, "");

}

#endif

TEST(xchar_test, format) {

  EXPECT_EQ(L"42", fmt::format(L"{}", 42));

  EXPECT_EQ(L"4.2", fmt::format(L"{}", 4.2));

  EXPECT_EQ(L"abc", fmt::format(L"{}", L"abc"));

  EXPECT_EQ(L"z", fmt::format(L"{}", L'z'));

  EXPECT_THROW(fmt::format(fmt::runtime(L"{:*\x343E}"), 42), fmt::format_error);

  EXPECT_EQ(L"true", fmt::format(L"{}", true));

  EXPECT_EQ(L"a", fmt::format(L"{0}", 'a'));

  EXPECT_EQ(L"a", fmt::format(L"{0}", L'a'));

  EXPECT_EQ(L"Cyrillic letter \x42e",

            fmt::format(L"Cyrillic letter {}", L'\x42e'));

  EXPECT_EQ(L"abc1", fmt::format(L"{}c{}", L"ab", 1));

}

TEST(xchar_test, is_formattable) {

  static_assert(!fmt::is_formattable<const wchar_t*>::value, "");

}

TEST(xchar_test, compile_time_string) {

  EXPECT_EQ(fmt::format(fmt::wformat_string<int>(L"{}"), 42), L"42");

#if defined(FMT_USE_STRING_VIEW) && FMT_CPLUSPLUS >= 201703L

  EXPECT_EQ(fmt::format(FMT_STRING(std::wstring_view(L"{}")), 42), L"42");

#endif

}

#if FMT_CPLUSPLUS > 201103L

struct custom_char {

  int value;

  custom_char() = default;

  template <typename T>

  constexpr custom_char(T val) : value(static_cast<int>(val)) {}

  constexpr operator char() const {

    return value <= 0xff ? static_cast<char>(value) : '\0';

  }

  constexpr bool operator<(custom_char c) const { return value < c.value; }

};

namespace std {

template <> struct char_traits<custom_char> {

  using char_type = custom_char;

  using int_type = int;

  using off_type = streamoff;

  using pos_type = streampos;

  using state_type = mbstate_t;

  static constexpr void assign(char_type& r, const char_type& a) { r = a; }

  static constexpr bool eq(char_type a, char_type b) { return a == b; }

  static constexpr bool lt(char_type a, char_type b) { return a < b; }

  static FMT_CONSTEXPR int compare(const char_type* s1, const char_type* s2,

                                   size_t count) {

    for (; count; count--, s1++, s2++) {

      if (lt(*s1, *s2)) return -1;

      if (lt(*s2, *s1)) return 1;

    }

    return 0;

  }

  static FMT_CONSTEXPR size_t length(const char_type* s) {

    size_t count = 0;

    while (!eq(*s++, custom_char(0))) count++;

    return count;

  }

  static const char_type* find(const char_type*, size_t, const char_type&);

  static FMT_CONSTEXPR char_type* move(char_type* dest, const char_type* src,

                                       size_t count) {

    if (count == 0) return dest;

    char_type* ret = dest;

    if (src < dest) {

      dest += count;

      src += count;

      for (; count; count--) assign(*--dest, *--src);

    } else if (src > dest)

      copy(dest, src, count);

    return ret;

  }

  static FMT_CONSTEXPR char_type* copy(char_type* dest, const char_type* src,

                                       size_t count) {

    char_type* ret = dest;

    for (; count; count--) assign(*dest++, *src++);

    return ret;

  }

  static FMT_CONSTEXPR char_type* assign(char_type* dest, std::size_t count,

                                         char_type a) {

    char_type* ret = dest;

    for (; count; count--) assign(*dest++, a);

    return ret;

  }

  static int_type not_eof(int_type);

  static char_type to_char_type(int_type);

  static int_type to_int_type(char_type);

  static bool eq_int_type(int_type, int_type);

  static int_type eof();

};

}  // namespace std

auto to_ascii(custom_char c) -> char { return c; }

FMT_BEGIN_NAMESPACE

template <> struct is_char<custom_char> : std::true_type {};

FMT_END_NAMESPACE

TEST(xchar_test, format_custom_char) {

  const custom_char format[] = {'{', '}', 0};

  auto result = fmt::format(format, custom_char('x'));

  EXPECT_EQ(result.size(), 1);

  EXPECT_EQ(result[0], custom_char('x'));

}

#endif

TEST(xchar_test, format_to) {

  auto buf = std::vector<wchar_t>();

  fmt::format_to(std::back_inserter(buf), L"{}{}", 42, L'\0');

  EXPECT_STREQ(buf.data(), L"42");

}

TEST(xchar_test, compile_time_string_format_to) {

  std::wstring ws;

  fmt::format_to(std::back_inserter(ws), FMT_STRING(L"{}"), 42);

  EXPECT_EQ(L"42", ws);

}

TEST(xchar_test, vformat_to) {

  int n = 42;

  auto args = fmt::make_wformat_args(n);

  auto w = std::wstring();

  fmt::vformat_to(std::back_inserter(w), L"{}", args);

  EXPECT_EQ(L"42", w);

}

namespace test {

struct struct_as_wstring_view {};

auto format_as(struct_as_wstring_view) -> fmt::wstring_view { return L"foo"; }

}  // namespace test

TEST(xchar_test, format_as) {

  EXPECT_EQ(fmt::format(L"{}", test::struct_as_wstring_view()), L"foo");

}

TEST(format_test, wide_format_to_n) {

  wchar_t buffer[4];

  buffer[3] = L'x';

  auto result = fmt::format_to_n(buffer, 3, L"{}", 12345);

  EXPECT_EQ(5u, result.size);

  EXPECT_EQ(buffer + 3, result.out);

  EXPECT_EQ(L"123x", fmt::wstring_view(buffer, 4));

  buffer[0] = L'x';

  buffer[1] = L'x';

  buffer[2] = L'x';

  result = fmt::format_to_n(buffer, 3, L"{}", L'A');

  EXPECT_EQ(1u, result.size);

  EXPECT_EQ(buffer + 1, result.out);

  EXPECT_EQ(L"Axxx", fmt::wstring_view(buffer, 4));

  result = fmt::format_to_n(buffer, 3, L"{}{} ", L'B', L'C');

  EXPECT_EQ(3u, result.size);

  EXPECT_EQ(buffer + 3, result.out);

  EXPECT_EQ(L"BC x", fmt::wstring_view(buffer, 4));

}

#if FMT_USE_USER_DEFINED_LITERALS

TEST(xchar_test, named_arg_udl) {

  using namespace fmt::literals;

  auto udl_a =

      fmt::format(L"{first}{second}{first}{third}", L"first"_a = L"abra",

                  L"second"_a = L"cad", L"third"_a = 99);

  EXPECT_EQ(

      fmt::format(L"{first}{second}{first}{third}", fmt::arg(L"first", L"abra"),

                  fmt::arg(L"second", L"cad"), fmt::arg(L"third", 99)),

      udl_a);

}

#endif  // FMT_USE_USER_DEFINED_LITERALS

TEST(xchar_test, print) {

  // Check that the wide print overload compiles.

  if (fmt::detail::const_check(false)) {

    fmt::print(L"test");

    fmt::println(L"test");

  }

}

TEST(xchar_test, join) {

  int v[3] = {1, 2, 3};

  EXPECT_EQ(fmt::format(L"({})", fmt::join(v, v + 3, L", ")), L"(1, 2, 3)");

  auto t = std::tuple<wchar_t, int, float>('a', 1, 2.0f);

  EXPECT_EQ(fmt::format(L"({})", fmt::join(t, L", ")), L"(a, 1, 2)");

}

enum streamable_enum {};

std::wostream& operator<<(std::wostream& os, streamable_enum) {

  return os << L"streamable_enum";

}

namespace fmt {

template <>

struct formatter<streamable_enum, wchar_t> : basic_ostream_formatter<wchar_t> {

};

}  // namespace fmt

enum unstreamable_enum {};

auto format_as(unstreamable_enum e) -> int { return e; }

TEST(xchar_test, enum) {

  EXPECT_EQ(L"streamable_enum", fmt::format(L"{}", streamable_enum()));

  EXPECT_EQ(L"0", fmt::format(L"{}", unstreamable_enum()));

}

struct streamable_and_unformattable {};

auto operator<<(std::wostream& os, streamable_and_unformattable)

    -> std::wostream& {

  return os << L"foo";

}

TEST(xchar_test, streamed) {

  EXPECT_FALSE(fmt::is_formattable<streamable_and_unformattable>());

  EXPECT_EQ(fmt::format(L"{}", fmt::streamed(streamable_and_unformattable())),

            L"foo");

}

TEST(xchar_test, sign_not_truncated) {

  wchar_t format_str[] = {

      L'{', L':',

      '+' | static_cast<wchar_t>(1 << fmt::detail::num_bits<char>()), L'}', 0};

  EXPECT_THROW(fmt::format(fmt::runtime(format_str), 42), fmt::format_error);

}

TEST(xchar_test, chrono) {

  auto tm = std::tm();

  tm.tm_year = 116;

  tm.tm_mon = 3;

  tm.tm_mday = 25;

  tm.tm_hour = 11;

  tm.tm_min = 22;

  tm.tm_sec = 33;

  EXPECT_EQ(fmt::format("The date is {:%Y-%m-%d %H:%M:%S}.", tm),

            "The date is 2016-04-25 11:22:33.");

  EXPECT_EQ(L"42s", fmt::format(L"{}", std::chrono::seconds(42)));

  EXPECT_EQ(fmt::format(L"{:%F}", tm), L"2016-04-25");

  EXPECT_EQ(fmt::format(L"{:%T}", tm), L"11:22:33");

}

std::wstring system_wcsftime(const std::wstring& format, const std::tm* timeptr,

                             std::locale* locptr = nullptr) {

  auto loc = locptr ? *locptr : std::locale::classic();

  auto& facet = std::use_facet<std::time_put<wchar_t>>(loc);

  std::wostringstream os;

  os.imbue(loc);

  facet.put(os, os, L' ', timeptr, format.c_str(),

            format.c_str() + format.size());

#ifdef _WIN32

  // Workaround a bug in older versions of Universal CRT.

  auto str = os.str();

  if (str == L"-0000") str = L"+0000";

  return str;

#else

  return os.str();

#endif

}

TEST(chrono_test_wchar, time_point) {

  auto t1 = std::chrono::time_point_cast<std::chrono::seconds>(

      std::chrono::system_clock::now());

  std::vector<std::wstring> spec_list = {

      L"%%",  L"%n",  L"%t",  L"%Y",  L"%EY", L"%y",  L"%Oy", L"%Ey", L"%C",

      L"%EC", L"%G",  L"%g",  L"%b",  L"%h",  L"%B",  L"%m",  L"%Om", L"%U",

      L"%OU", L"%W",  L"%OW", L"%V",  L"%OV", L"%j",  L"%d",  L"%Od", L"%e",

      L"%Oe", L"%a",  L"%A",  L"%w",  L"%Ow", L"%u",  L"%Ou", L"%H",  L"%OH",

      L"%I",  L"%OI", L"%M",  L"%OM", L"%S",  L"%OS", L"%x",  L"%Ex", L"%X",

      L"%EX", L"%D",  L"%F",  L"%R",  L"%T",  L"%p"};

#ifndef _WIN32

  // Disabled on Windows, because these formats is not consistent among

  // platforms.

  spec_list.insert(spec_list.end(), {L"%c", L"%Ec", L"%r"});

#elif !FMT_HAS_C99_STRFTIME

  // Only C89 conversion specifiers when using MSVCRT instead of UCRT

  spec_list = {L"%%", L"%Y", L"%y", L"%b", L"%B", L"%m", L"%U",

               L"%W", L"%j", L"%d", L"%a", L"%A", L"%w", L"%H",

               L"%I", L"%M", L"%S", L"%x", L"%X", L"%p"};

#endif

  spec_list.push_back(L"%Y-%m-%d %H:%M:%S");

  for (const auto& spec : spec_list) {

    auto t = std::chrono::system_clock::to_time_t(t1);

    auto tm = *std::gmtime(&t);

    auto sys_output = system_wcsftime(spec, &tm);

    auto fmt_spec = fmt::format(L"{{:{}}}", spec);

    EXPECT_EQ(sys_output, fmt::format(fmt::runtime(fmt_spec), t1));

    EXPECT_EQ(sys_output, fmt::format(fmt::runtime(fmt_spec), tm));

  }

  // Timezone formatters tests makes sense for localtime.

#if FMT_HAS_C99_STRFTIME

  spec_list = {L"%z", L"%Z"};

#else

  spec_list = {L"%Z"};

#endif

  for (const auto& spec : spec_list) {

    auto t = std::chrono::system_clock::to_time_t(t1);

    auto tm = *std::localtime(&t);

    auto sys_output = system_wcsftime(spec, &tm);

    auto fmt_spec = fmt::format(L"{{:{}}}", spec);

    EXPECT_EQ(sys_output, fmt::format(fmt::runtime(fmt_spec), tm));

    if (spec == L"%z") {

      sys_output.insert(sys_output.end() - 2, 1, L':');

      EXPECT_EQ(sys_output, fmt::format(L"{:%Ez}", tm));

      EXPECT_EQ(sys_output, fmt::format(L"{:%Oz}", tm));

    }

  }

  // Separate tests for UTC, since std::time_put can use local time and ignoring

  // the timezone in std::tm (if it presents on platform).

  if (fmt::detail::has_member_data_tm_zone<std::tm>::value) {

    auto t = std::chrono::system_clock::to_time_t(t1);

    auto tm = *std::gmtime(&t);

    std::vector<std::wstring> tz_names = {L"GMT", L"UTC"};

    EXPECT_THAT(tz_names, Contains(fmt::format(L"{:%Z}", t1)));

    EXPECT_THAT(tz_names, Contains(fmt::format(L"{:%Z}", tm)));

  }

  if (fmt::detail::has_member_data_tm_gmtoff<std::tm>::value) {

    auto t = std::chrono::system_clock::to_time_t(t1);

    auto tm = *std::gmtime(&t);

    EXPECT_EQ(L"+0000", fmt::format(L"{:%z}", t1));

    EXPECT_EQ(L"+0000", fmt::format(L"{:%z}", tm));

    EXPECT_EQ(L"+00:00", fmt::format(L"{:%Ez}", t1));

    EXPECT_EQ(L"+00:00", fmt::format(L"{:%Ez}", tm));

    EXPECT_EQ(L"+00:00", fmt::format(L"{:%Oz}", t1));

    EXPECT_EQ(L"+00:00", fmt::format(L"{:%Oz}", tm));

  }

}

TEST(xchar_test, color) {

  EXPECT_EQ(fmt::format(fg(fmt::rgb(255, 20, 30)), L"rgb(255,20,30) wide"),

            L"\x1b[38;2;255;020;030mrgb(255,20,30) wide\x1b[0m");

}

TEST(xchar_test, ostream) {

#if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 409

  {

    std::wostringstream wos;

    fmt::print(wos, L"Don't {}!", L"panic");

    EXPECT_EQ(wos.str(), L"Don't panic!");

  }

  {

    std::wostringstream wos;

    fmt::println(wos, L"Don't {}!", L"panic");

    EXPECT_EQ(wos.str(), L"Don't panic!\n");

  }

#endif

}

TEST(xchar_test, format_map) {

  auto m = std::map<std::wstring, int>{{L"one", 1}, {L"t\"wo", 2}};

  EXPECT_EQ(fmt::format(L"{}", m), L"{\"one\": 1, \"t\\\"wo\": 2}");

}

TEST(xchar_test, escape_string) {

  using vec = std::vector<std::wstring>;

  EXPECT_EQ(fmt::format(L"{}", vec{L"\n\r\t\"\\"}), L"[\"\\n\\r\\t\\\"\\\\\"]");

  EXPECT_EQ(fmt::format(L"{}", vec{L"понедельник"}), L"[\"понедельник\"]");

}

TEST(xchar_test, to_wstring) { EXPECT_EQ(L"42", fmt::to_wstring(42)); }

#ifndef FMT_STATIC_THOUSANDS_SEPARATOR

template <typename Char> struct numpunct : std::numpunct<Char> {

 protected:

  Char do_decimal_point() const override { return '?'; }

  std::string do_grouping() const override { return "\03"; }

  Char do_thousands_sep() const override { return '~'; }

};

template <typename Char> struct no_grouping : std::numpunct<Char> {

 protected:

  Char do_decimal_point() const override { return '.'; }

  std::string do_grouping() const override { return ""; }

  Char do_thousands_sep() const override { return ','; }

};

template <typename Char> struct special_grouping : std::numpunct<Char> {

 protected:

  Char do_decimal_point() const override { return '.'; }

  std::string do_grouping() const override { return "\03\02"; }

  Char do_thousands_sep() const override { return ','; }

};

template <typename Char> struct small_grouping : std::numpunct<Char> {

 protected:

  Char do_decimal_point() const override { return '.'; }

  std::string do_grouping() const override { return "\01"; }

  Char do_thousands_sep() const override { return ','; }

};

TEST(locale_test, localized_double) {

  auto loc = std::locale(std::locale(), new numpunct<char>());

  EXPECT_EQ(fmt::format(loc, "{:L}", 1.23), "1?23");

  EXPECT_EQ(fmt::format(loc, "{:Lf}", 1.23), "1?230000");

  EXPECT_EQ(fmt::format(loc, "{:L}", 1234.5), "1~234?5");

  EXPECT_EQ(fmt::format(loc, "{:L}", 12000.0), "12~000");

  EXPECT_EQ(fmt::format(loc, "{:8L}", 1230.0), "   1~230");

  EXPECT_EQ(fmt::format(loc, "{:15.6Lf}", 0.1), "       0?100000");

  EXPECT_EQ(fmt::format(loc, "{:15.6Lf}", 1.0), "       1?000000");

  EXPECT_EQ(fmt::format(loc, "{:15.6Lf}", 1e3), "   1~000?000000");

}

TEST(locale_test, format) {

  auto loc = std::locale(std::locale(), new numpunct<char>());

  EXPECT_EQ("1234567", fmt::format(std::locale(), "{:L}", 1234567));

  EXPECT_EQ("1~234~567", fmt::format(loc, "{:L}", 1234567));

  EXPECT_EQ("-1~234~567", fmt::format(loc, "{:L}", -1234567));

  EXPECT_EQ("-256", fmt::format(loc, "{:L}", -256));

  auto n = 1234567;

  EXPECT_EQ("1~234~567", fmt::vformat(loc, "{:L}", fmt::make_format_args(n)));

  auto s = std::string();

  fmt::format_to(std::back_inserter(s), loc, "{:L}", 1234567);

  EXPECT_EQ("1~234~567", s);

  auto no_grouping_loc = std::locale(std::locale(), new no_grouping<char>());

  EXPECT_EQ("1234567", fmt::format(no_grouping_loc, "{:L}", 1234567));

  auto special_grouping_loc =

      std::locale(std::locale(), new special_grouping<char>());

  EXPECT_EQ("1,23,45,678", fmt::format(special_grouping_loc, "{:L}", 12345678));

  EXPECT_EQ("12,345", fmt::format(special_grouping_loc, "{:L}", 12345));

  auto small_grouping_loc =

      std::locale(std::locale(), new small_grouping<char>());

  EXPECT_EQ("4,2,9,4,9,6,7,2,9,5",

            fmt::format(small_grouping_loc, "{:L}", max_value<uint32_t>()));

}

TEST(locale_test, format_default_align) {

  auto loc = std::locale({}, new special_grouping<char>());

  EXPECT_EQ("  12,345", fmt::format(loc, "{:8L}", 12345));

}

TEST(locale_test, format_plus) {

  auto loc = std::locale({}, new special_grouping<char>());

  EXPECT_EQ("+100", fmt::format(loc, "{:+L}", 100));

}

TEST(locale_test, wformat) {

  auto loc = std::locale(std::locale(), new numpunct<wchar_t>());

  EXPECT_EQ(L"1234567", fmt::format(std::locale(), L"{:L}", 1234567));

  EXPECT_EQ(L"1~234~567", fmt::format(loc, L"{:L}", 1234567));

  int n = 1234567;

  EXPECT_EQ(L"1~234~567",

            fmt::vformat(loc, L"{:L}", fmt::make_wformat_args(n)));

  EXPECT_EQ(L"1234567", fmt::format(std::locale("C"), L"{:L}", 1234567));

  auto no_grouping_loc = std::locale(std::locale(), new no_grouping<wchar_t>());

  EXPECT_EQ(L"1234567", fmt::format(no_grouping_loc, L"{:L}", 1234567));

  auto special_grouping_loc =

      std::locale(std::locale(), new special_grouping<wchar_t>());

  EXPECT_EQ(L"1,23,45,678",

            fmt::format(special_grouping_loc, L"{:L}", 12345678));

  auto small_grouping_loc =

      std::locale(std::locale(), new small_grouping<wchar_t>());

  EXPECT_EQ(L"4,2,9,4,9,6,7,2,9,5",

            fmt::format(small_grouping_loc, L"{:L}", max_value<uint32_t>()));

}

TEST(locale_test, int_formatter) {

  auto loc = std::locale(std::locale(), new special_grouping<char>());

  auto f = fmt::formatter<int>();

  auto parse_ctx = fmt::format_parse_context("L");

  f.parse(parse_ctx);

  auto buf = fmt::memory_buffer();

  fmt::basic_format_context<fmt::appender, char> format_ctx(

      fmt::appender(buf), {}, fmt::detail::locale_ref(loc));

  f.format(12345, format_ctx);

  EXPECT_EQ(fmt::to_string(buf), "12,345");

}

TEST(locale_test, chrono_weekday) {

  auto loc = get_locale("es_ES.UTF-8", "Spanish_Spain.1252");

  auto loc_old = std::locale::global(loc);

  auto sat = fmt::weekday(6);

  EXPECT_EQ(fmt::format(L"{}", sat), L"Sat");

  if (loc != std::locale::classic()) {

    // L'\xE1' is 'á'.

    auto saturdays = std::vector<std::wstring>{

        L"s\xE1"

        "b",

        L"s\xE1."};

    EXPECT_THAT(saturdays, Contains(fmt::format(loc, L"{:L}", sat)));

  }

  std::locale::global(loc_old);

}

TEST(locale_test, sign) {

  EXPECT_EQ(fmt::format(std::locale(), L"{:L}", -50), L"-50");

}

TEST(std_test_xchar, complex) {

  auto s = fmt::format(L"{}", std::complex<double>(1, 2));

  EXPECT_EQ(s, L"(1+2i)");

  EXPECT_EQ(fmt::format(L"{:.2f}", std::complex<double>(1, 2)), L"(1.00+2.00i)");

  EXPECT_EQ(fmt::format(L"{:8}", std::complex<double>(1, 2)), L"(1+2i)  ");

}

TEST(std_test_xchar, optional) {

#  ifdef __cpp_lib_optional

  EXPECT_EQ(fmt::format(L"{}", std::optional{L'C'}), L"optional(\'C\')");

  EXPECT_EQ(fmt::format(L"{}", std::optional{std::wstring{L"wide string"}}),

            L"optional(\"wide string\")");

#  endif

}

#endif  // FMT_STATIC_THOUSANDS_SEPARATOR