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fmt/test/module-test.cc

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// Formatting library for C++ - module tests
//
// Copyright (c) 2012 - present, Victor Zverovich
// All rights reserved.
//
// For the license information refer to format.h.
//
// Copyright (c) 2021 - present, Daniela Engert
// All Rights Reserved
// {fmt} module.
#ifdef _MSC_FULL_VER
// hide some implementation bugs in msvc
// that are not essential to users of the module.
# define FMT_HIDE_MODULE_BUGS
#endif
#define FMT_MODULE_TEST
#include <bit>
#include <chrono>
#include <exception>
#include <iterator>
#include <locale>
#include <memory>
#include <ostream>
#include <string>
#include <string_view>
#include <system_error>
#if (__has_include(<fcntl.h>) || defined(__APPLE__) || \
defined(__linux__)) && \
(!defined(WINAPI_FAMILY) || (WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP))
# include <fcntl.h>
# define FMT_USE_FCNTL 1
#else
# define FMT_USE_FCNTL 0
#endif
#define FMT_NOEXCEPT noexcept
#if defined(_WIN32) && !defined(__MINGW32__)
# define FMT_POSIX(call) _##call
#else
# define FMT_POSIX(call) call
#endif
#define FMT_OS_H_ // don't pull in os.h directly or indirectly
import fmt;
// check for macros leaking from BMI
static bool macro_leaked =
#if defined(FMT_CORE_H_) || defined(FMT_FORMAT_H_)
true;
#else
false;
#endif
// Include sources to pick up functions and classes from the module rather than
// from the non-modular library which is baked into the 'test-main' library.
// This averts linker problems:
// - strong ownership model: missing linker symbols
// - weak ownership model: duplicate linker symbols
#include "gtest-extra.cc"
#include "util.cc"
// an implicitly exported namespace must be visible [module.interface]/2.2
TEST(module_test, namespace) {
using namespace fmt;
using namespace fmt::literals;
ASSERT_TRUE(true);
}
namespace detail {
bool oops_detail_namespace_is_visible;
}
namespace fmt {
bool namespace_detail_invisible() {
#if defined(FMT_HIDE_MODULE_BUGS) && defined(_MSC_FULL_VER) && \
((_MSC_VER == 1929 && _MSC_FULL_VER <= 192930136) || \
(_MSC_VER == 1930 && _MSC_FULL_VER <= 193030704))
// bug in msvc up to 16.11.5 / 17.0-pre5:
// the namespace is visible even when it is neither
// implicitly nor explicitly exported
return true;
#else
using namespace detail;
// this fails to compile if fmt::detail is visible
return !oops_detail_namespace_is_visible;
#endif
}
} // namespace fmt
// the non-exported namespace 'detail' must be invisible [module.interface]/2
TEST(module_test, detail_namespace) {
EXPECT_TRUE(fmt::namespace_detail_invisible());
}
// macros must not be imported from a *named* module [cpp.import]/5.1
TEST(module_test, macros) {
#if defined(FMT_HIDE_MODULE_BUGS) && defined(_MSC_FULL_VER) && \
_MSC_FULL_VER <= 192930130
// bug in msvc up to 16.11-pre2:
// include-guard macros leak from BMI
// and even worse: they cannot be #undef-ined
macro_leaked = false;
#endif
EXPECT_FALSE(macro_leaked);
}
// The following is less about functional testing (that's done elsewhere)
// but rather visibility of all client-facing overloads, reachability of
// non-exported entities, name lookup and overload resolution within
// template instantitions.
// Excercise all exported entities of the API at least once.
// Instantiate as many code paths as possible.
TEST(module_test, to_string) {
EXPECT_EQ("42", fmt::to_string(42));
EXPECT_EQ("42", fmt::to_string(42.0));
EXPECT_EQ(L"42", fmt::to_wstring(42));
EXPECT_EQ(L"42", fmt::to_wstring(42.0));
}
TEST(module_test, format) {
EXPECT_EQ("42", fmt::format("{:}", 42));
EXPECT_EQ("-42", fmt::format("{0}", -42.0));
EXPECT_EQ(L"42", fmt::format(L"{:}", 42));
EXPECT_EQ(L"-42", fmt::format(L"{0}", -42.0));
}
TEST(module_test, format_to) {
std::string s;
fmt::format_to(std::back_inserter(s), "{}", 42);
EXPECT_EQ("42", s);
char buffer[4] = {0};
fmt::format_to(buffer, "{}", 42);
EXPECT_EQ("42", std::string_view(buffer));
fmt::memory_buffer mb;
fmt::format_to(mb, "{}", 42);
EXPECT_EQ("42", std::string_view(buffer));
std::wstring w;
fmt::format_to(std::back_inserter(w), L"{}", 42);
EXPECT_EQ(L"42", w);
wchar_t wbuffer[4] = {0};
fmt::format_to(wbuffer, L"{}", 42);
EXPECT_EQ(L"42", std::wstring_view(wbuffer));
fmt::wmemory_buffer wb;
fmt::format_to(wb, L"{}", 42);
EXPECT_EQ(L"42", std::wstring_view(wbuffer));
}
TEST(module_test, formatted_size) {
EXPECT_EQ(2u, fmt::formatted_size("{}", 42));
EXPECT_EQ(2u, fmt::formatted_size(L"{}", 42));
}
TEST(module_test, format_to_n) {
std::string s;
auto result = fmt::format_to_n(std::back_inserter(s), 1, "{}", 42);
EXPECT_EQ(2u, result.size);
char buffer[4] = {0};
fmt::format_to_n(buffer, 3, "{}", 12345);
std::wstring w;
auto wresult = fmt::format_to_n(std::back_inserter(w), 1, L"{}", 42);
EXPECT_EQ(2u, wresult.size);
wchar_t wbuffer[4] = {0};
fmt::format_to_n(wbuffer, 3, L"{}", 12345);
}
TEST(module_test, format_args) {
auto no_args = fmt::format_args();
EXPECT_FALSE(no_args.get(1));
fmt::basic_format_args args = fmt::make_format_args(42);
EXPECT_TRUE(args.max_size() > 0);
auto arg0 = args.get(0);
EXPECT_TRUE(arg0);
decltype(arg0) arg_none;
EXPECT_FALSE(arg_none);
EXPECT_TRUE(arg0.type() != arg_none.type());
}
TEST(module_test, wformat_args) {
auto no_args = fmt::wformat_args();
EXPECT_FALSE(no_args.get(1));
fmt::basic_format_args args = fmt::make_wformat_args(42);
EXPECT_TRUE(args.get(0));
}
TEST(module_test, checked_format_args) {
fmt::basic_format_args args = fmt::make_args_checked<int>("{}", 42);
EXPECT_TRUE(args.get(0));
fmt::basic_format_args wargs = fmt::make_args_checked<int>(L"{}", 42);
EXPECT_TRUE(wargs.get(0));
}
TEST(module_test, dynamic_format_args) {
fmt::dynamic_format_arg_store<fmt::format_context> dyn_store;
dyn_store.push_back(fmt::arg("a42", 42));
fmt::basic_format_args args = dyn_store;
EXPECT_FALSE(args.get(3));
EXPECT_TRUE(args.get(fmt::string_view("a42")));
fmt::dynamic_format_arg_store<fmt::wformat_context> wdyn_store;
wdyn_store.push_back(fmt::arg(L"a42", 42));
fmt::basic_format_args wargs = wdyn_store;
EXPECT_FALSE(wargs.get(3));
EXPECT_TRUE(wargs.get(fmt::wstring_view(L"a42")));
}
TEST(module_test, vformat) {
EXPECT_EQ("42", fmt::vformat("{}", fmt::make_format_args(42)));
EXPECT_EQ(L"42", fmt::vformat(fmt::to_string_view(L"{}"),
fmt::make_wformat_args(42)));
}
TEST(module_test, vformat_to) {
auto store = fmt::make_format_args(42);
std::string s;
fmt::vformat_to(std::back_inserter(s), "{}", store);
EXPECT_EQ("42", s);
char buffer[4] = {0};
fmt::vformat_to(buffer, "{:}", store);
EXPECT_EQ("42", std::string_view(buffer));
auto wstore = fmt::make_wformat_args(42);
std::wstring w;
fmt::vformat_to(std::back_inserter(w), L"{}", wstore);
EXPECT_EQ(L"42", w);
wchar_t wbuffer[4] = {0};
fmt::vformat_to(wbuffer, L"{:}", wstore);
EXPECT_EQ(L"42", std::wstring_view(wbuffer));
}
TEST(module_test, vformat_to_n) {
auto store = fmt::make_format_args(12345);
std::string s;
auto result = fmt::vformat_to_n(std::back_inserter(s), 1, "{}", store);
char buffer[4] = {0};
fmt::vformat_to_n(buffer, 3, "{:}", store);
auto wstore = fmt::make_wformat_args(12345);
std::wstring w;
auto wresult = fmt::vformat_to_n(std::back_inserter(w), 1,
fmt::to_string_view(L"{}"), wstore);
wchar_t wbuffer[4] = {0};
fmt::vformat_to_n(wbuffer, 3, fmt::to_string_view(L"{:}"), wstore);
}
std::string as_string(std::wstring_view text) {
return {reinterpret_cast<const char*>(text.data()),
text.size() * sizeof(text[0])};
}
TEST(module_test, print) {
EXPECT_WRITE(stdout, fmt::print("{}µ", 42), "42µ");
EXPECT_WRITE(stderr, fmt::print(stderr, "{}µ", 4.2), "4.2µ");
if (false) {
EXPECT_WRITE(stdout, fmt::print(L"{}µ", 42), as_string(L"42µ"));
EXPECT_WRITE(stderr, fmt::print(stderr, L"{}µ", 4.2), as_string(L"4.2µ"));
}
}
TEST(module_test, vprint) {
EXPECT_WRITE(stdout, fmt::vprint("{:}µ", fmt::make_format_args(42)), "42µ");
EXPECT_WRITE(stderr, fmt::vprint(stderr, "{}", fmt::make_format_args(4.2)),
"4.2");
if (false) {
EXPECT_WRITE(stdout, fmt::vprint(L"{:}µ", fmt::make_wformat_args(42)),
as_string(L"42µ"));
EXPECT_WRITE(stderr, fmt::vprint(stderr, L"{}", fmt::make_wformat_args(42)),
as_string(L"42"));
}
}
TEST(module_test, named_args) {
EXPECT_EQ("42", fmt::format("{answer}", fmt::arg("answer", 42)));
EXPECT_EQ(L"42", fmt::format(L"{answer}", fmt::arg(L"answer", 42)));
}
TEST(module_test, literals) {
using namespace fmt::literals;
EXPECT_EQ("42", fmt::format("{answer}", "answer"_a = 42));
EXPECT_EQ("42", "{}"_format(42));
EXPECT_EQ(L"42", fmt::format(L"{answer}", L"answer"_a = 42));
EXPECT_EQ(L"42", L"{}"_format(42));
}
TEST(module_test, locale) {
auto store = fmt::make_format_args(4.2);
const auto classic = std::locale::classic();
EXPECT_EQ("4.2", fmt::format(classic, "{:L}", 4.2));
EXPECT_EQ("4.2", fmt::vformat(classic, "{:L}", store));
std::string s;
fmt::vformat_to(std::back_inserter(s), classic, "{:L}", store);
EXPECT_EQ("4.2", s);
EXPECT_EQ("4.2", fmt::format("{:L}", 4.2));
auto wstore = fmt::make_wformat_args(4.2);
EXPECT_EQ(L"4.2", fmt::format(classic, L"{:L}", 4.2));
EXPECT_EQ(L"4.2", fmt::vformat(classic, L"{:L}", wstore));
std::wstring w;
fmt::vformat_to(std::back_inserter(w), classic, L"{:L}", wstore);
EXPECT_EQ(L"4.2", w);
EXPECT_EQ(L"4.2", fmt::format(L"{:L}", 4.2));
}
TEST(module_test, string_view) {
fmt::string_view nsv("fmt");
EXPECT_EQ("fmt", nsv);
EXPECT_TRUE(fmt::string_view("fmt") == nsv);
fmt::wstring_view wsv(L"fmt");
EXPECT_EQ(L"fmt", wsv);
EXPECT_TRUE(fmt::wstring_view(L"fmt") == wsv);
}
TEST(module_test, memory_buffer) {
fmt::basic_memory_buffer<char, fmt::inline_buffer_size> buffer;
fmt::format_to(buffer, "{}", "42");
EXPECT_EQ("42", to_string(buffer));
fmt::memory_buffer nbuffer(std::move(buffer));
EXPECT_EQ("42", to_string(nbuffer));
buffer = std::move(nbuffer);
EXPECT_EQ("42", to_string(buffer));
nbuffer.clear();
EXPECT_EQ(0u, to_string(nbuffer).size());
fmt::wmemory_buffer wbuffer;
EXPECT_EQ(0u, to_string(wbuffer).size());
}
TEST(module_test, is_char) {
EXPECT_TRUE(fmt::is_char<char>());
EXPECT_TRUE(fmt::is_char<wchar_t>());
EXPECT_TRUE(fmt::is_char<char8_t>());
EXPECT_TRUE(fmt::is_char<char16_t>());
EXPECT_TRUE(fmt::is_char<char32_t>());
EXPECT_FALSE(fmt::is_char<signed char>());
}
TEST(module_test, ptr) {
uintptr_t answer = 42;
auto p = std::bit_cast<int*>(answer);
EXPECT_EQ("0x2a", fmt::to_string(fmt::ptr(p)));
std::unique_ptr<int> up(p);
EXPECT_EQ("0x2a", fmt::to_string(fmt::ptr(up)));
up.release();
auto sp = std::make_shared<int>(0);
p = sp.get();
EXPECT_EQ(fmt::to_string(fmt::ptr(p)), fmt::to_string(fmt::ptr(sp)));
}
TEST(module_test, errors) {
auto store = fmt::make_format_args(42);
EXPECT_THROW(throw fmt::format_error("oops"), std::exception);
EXPECT_THROW(throw fmt::vsystem_error(0, "{}", store), std::system_error);
EXPECT_THROW(throw fmt::system_error(0, "{}", 42), std::system_error);
fmt::memory_buffer buffer;
fmt::format_system_error(buffer, 0, "oops");
auto oops = to_string(buffer);
EXPECT_TRUE(oops.size() > 0);
EXPECT_WRITE(stderr, fmt::report_system_error(0, "oops"), oops + '\n');
#ifdef _WIN32
EXPECT_THROW(throw fmt::vwindows_error(0, "{}", store), std::system_error);
EXPECT_THROW(throw fmt::windows_error(0, "{}", 42), std::system_error);
output_redirect redirect(stderr);
fmt::report_windows_error(0, "oops");
EXPECT_TRUE(redirect.restore_and_read().size() > 0);
#endif
}
TEST(module_test, error_code) {
EXPECT_EQ("generic:42",
fmt::format("{0}", std::error_code(42, std::generic_category())));
EXPECT_EQ("system:42",
fmt::format("{0}", std::error_code(42, fmt::system_category())));
EXPECT_EQ(L"generic:42",
fmt::format(L"{0}", std::error_code(42, std::generic_category())));
}
TEST(module_test, format_int) {
fmt::format_int sanswer(42);
EXPECT_EQ("42", fmt::string_view(sanswer.data(), sanswer.size()));
fmt::format_int uanswer(42u);
EXPECT_EQ("42", fmt::string_view(uanswer.data(), uanswer.size()));
}
struct test_formatter : fmt::formatter<char> {
bool check() { return true; }
};
struct test_dynamic_formatter : fmt::dynamic_formatter<> {
bool check() { return true; }
};
TEST(module_test, formatter) {
EXPECT_TRUE(test_formatter{}.check());
EXPECT_TRUE(test_dynamic_formatter{}.check());
}
TEST(module_test, join) {
int arr[3] = {1, 2, 3};
std::vector<double> vec{1.0, 2.0, 3.0};
std::initializer_list<int> il{1, 2, 3};
auto sep = fmt::to_string_view(", ");
EXPECT_EQ("1, 2, 3", to_string(fmt::join(arr + 0, arr + 3, sep)));
EXPECT_EQ("1, 2, 3", to_string(fmt::join(arr, sep)));
EXPECT_EQ("1, 2, 3", to_string(fmt::join(vec.begin(), vec.end(), sep)));
EXPECT_EQ("1, 2, 3", to_string(fmt::join(vec, sep)));
EXPECT_EQ("1, 2, 3", to_string(fmt::join(il, sep)));
auto wsep = fmt::to_string_view(L", ");
EXPECT_EQ(L"1, 2, 3", fmt::format(L"{}", fmt::join(arr + 0, arr + 3, wsep)));
EXPECT_EQ(L"1, 2, 3", fmt::format(L"{}", fmt::join(arr, wsep)));
EXPECT_EQ(L"1, 2, 3", fmt::format(L"{}", fmt::join(il, wsep)));
}
TEST(module_test, time) {
auto time_now = std::time(nullptr);
EXPECT_TRUE(fmt::localtime(time_now).tm_year > 120);
EXPECT_TRUE(fmt::gmtime(time_now).tm_year > 120);
auto chrono_now = std::chrono::system_clock::now();
EXPECT_TRUE(fmt::localtime(chrono_now).tm_year > 120);
EXPECT_TRUE(fmt::gmtime(chrono_now).tm_year > 120);
}
TEST(module_test, time_point) {
auto now = std::chrono::system_clock::now();
std::string_view past("2021-05-20 10:30:15");
EXPECT_TRUE(past < fmt::format("{:%Y-%m-%d %H:%M:%S}", now));
std::wstring_view wpast(L"2021-05-20 10:30:15");
EXPECT_TRUE(wpast < fmt::format(L"{:%Y-%m-%d %H:%M:%S}", now));
}
TEST(module_test, time_duration) {
using us = std::chrono::duration<double, std::micro>;
EXPECT_EQ("42s", fmt::format("{}", std::chrono::seconds{42}));
EXPECT_EQ("4.2µs", fmt::format("{:3.1}", us{4.234}));
EXPECT_EQ("4.2µs", fmt::format(std::locale::classic(), "{:L}", us{4.2}));
EXPECT_EQ(L"42s", fmt::format(L"{}", std::chrono::seconds{42}));
EXPECT_EQ(L"4.2µs", fmt::format(L"{:3.1}", us{4.234}));
EXPECT_EQ(L"4.2µs", fmt::format(std::locale::classic(), L"{:L}", us{4.2}));
}
TEST(module_test, weekday) {
EXPECT_EQ("Mon", fmt::format(std::locale::classic(), "{}", fmt::weekday(1)));
}
TEST(module_test, to_string_view) {
using fmt::to_string_view;
fmt::string_view nsv{to_string_view("42")};
EXPECT_EQ("42", nsv);
fmt::wstring_view wsv{to_string_view(L"42")};
EXPECT_EQ(L"42", wsv);
}
TEST(module_test, printf) {
EXPECT_WRITE(stdout, fmt::printf("%f", 42.123456), "42.123456");
EXPECT_WRITE(stdout, fmt::printf("%d", 42), "42");
if (false) {
EXPECT_WRITE(stdout, fmt::printf(L"%f", 42.123456),
as_string(L"42.123456"));
EXPECT_WRITE(stdout, fmt::printf(L"%d", 42), as_string(L"42"));
}
}
TEST(module_test, fprintf) {
EXPECT_WRITE(stderr, fmt::fprintf(stderr, "%d", 42), "42");
std::ostringstream os;
fmt::fprintf(os, "%s", "bla");
EXPECT_EQ("bla", os.str());
EXPECT_WRITE(stderr, fmt::fprintf(stderr, L"%d", 42), as_string(L"42"));
std::wostringstream ws;
fmt::fprintf(ws, L"%s", L"bla");
EXPECT_EQ(L"bla", ws.str());
}
TEST(module_test, sprintf) {
EXPECT_EQ("42", fmt::sprintf("%d", 42));
EXPECT_EQ(L"42", fmt::sprintf(L"%d", 42));
}
TEST(module_test, vprintf) {
EXPECT_WRITE(stdout, fmt::vprintf("%d", fmt::make_printf_args(42)), "42");
if (false) {
EXPECT_WRITE(stdout, fmt::vprintf(L"%d", fmt::make_wprintf_args(42)),
as_string(L"42"));
}
}
TEST(module_test, vfprintf) {
auto args = fmt::make_printf_args(42);
EXPECT_WRITE(stderr, fmt::vfprintf(stderr, "%d", args), "42");
std::ostringstream os;
fmt::vfprintf(os, "%d", args);
EXPECT_EQ("42", os.str());
auto wargs = fmt::make_wprintf_args(42);
if (false) {
EXPECT_WRITE(stderr, fmt::vfprintf(stderr, L"%d", wargs), as_string(L"42"));
}
std::wostringstream ws;
fmt::vfprintf(ws, L"%d", wargs);
EXPECT_EQ(L"42", ws.str());
}
TEST(module_test, vsprintf) {
EXPECT_EQ("42", fmt::vsprintf("%d", fmt::make_printf_args(42)));
EXPECT_EQ(L"42", fmt::vsprintf(L"%d", fmt::make_wprintf_args(42)));
}
TEST(module_test, color) {
auto fg_check = fg(fmt::rgb(255, 200, 30));
auto bg_check = bg(fmt::color::dark_slate_gray) | fmt::emphasis::italic;
auto emphasis_check = fmt::emphasis::underline | fmt::emphasis::bold;
EXPECT_EQ("\x1B[30m42\x1B[0m",
fmt::format(fg(fmt::terminal_color::black), "{}", 42));
EXPECT_EQ(L"\x1B[30m42\x1B[0m",
fmt::format(fg(fmt::terminal_color::black), L"{}", 42));
}
TEST(module_test, cstring_view) {
auto s = "fmt";
EXPECT_EQ(s, fmt::cstring_view(s).c_str());
auto w = L"fmt";
EXPECT_EQ(w, fmt::wcstring_view(w).c_str());
}
TEST(module_test, buffered_file) {
EXPECT_TRUE(fmt::buffered_file{}.get() == nullptr);
}
TEST(module_test, output_file) {
fmt::ostream out = fmt::output_file("module-test", fmt::buffer_size = 1);
out.close();
}
struct custom_context {
using char_type = char;
using parse_context_type = fmt::format_parse_context;
};
TEST(module_test, custom_context) {
fmt::basic_format_arg<custom_context> custom_arg;
EXPECT_TRUE(!custom_arg);
}
struct disabled_formatter {};
TEST(module_test, has_formatter) {
EXPECT_FALSE(
(fmt::has_formatter<disabled_formatter, fmt::format_context>::value));
}
TEST(module_test, is_formattable) {
EXPECT_FALSE(fmt::is_formattable<disabled_formatter>::value);
}
TEST(module_test, compile_format_string) {
using namespace fmt::literals;
EXPECT_EQ("42", fmt::format("{0:x}"_cf, 0x42));
EXPECT_EQ(L"42", fmt::format(L"{:}"_cf, 42));
EXPECT_EQ("4.2", fmt::format("{arg:3.1f}"_cf, "arg"_a = 4.2));
EXPECT_EQ(L" 42", fmt::format(L"{arg:>3}"_cf, L"arg"_a = L"42"));
}
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