mirror of
https://github.com/fmtlib/fmt.git
synced 2024-11-19 11:14:41 +00:00
470 lines
16 KiB
C++
470 lines
16 KiB
C++
// Formatting library for C++ - formatting library tests
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//
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// Copyright (c) 2012 - present, Victor Zverovich
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// All rights reserved.
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//
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// For the license information refer to format.h.
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#include "fmt/xchar.h"
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#include <complex>
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#include <cwchar>
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#include <vector>
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#include "fmt/chrono.h"
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#include "fmt/color.h"
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#include "fmt/ostream.h"
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#include "fmt/ranges.h"
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#include "gtest/gtest.h"
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using fmt::detail::max_value;
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namespace test_ns {
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template <typename Char> class test_string {
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private:
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std::basic_string<Char> s_;
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public:
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test_string(const Char* s) : s_(s) {}
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const Char* data() const { return s_.data(); }
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size_t length() const { return s_.size(); }
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operator const Char*() const { return s_.c_str(); }
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};
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template <typename Char>
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fmt::basic_string_view<Char> to_string_view(const test_string<Char>& s) {
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return {s.data(), s.length()};
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}
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struct non_string {};
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} // namespace test_ns
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template <typename T> class is_string_test : public testing::Test {};
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using string_char_types = testing::Types<char, wchar_t, char16_t, char32_t>;
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TYPED_TEST_SUITE(is_string_test, string_char_types);
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template <typename Char>
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struct derived_from_string_view : fmt::basic_string_view<Char> {};
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TYPED_TEST(is_string_test, is_string) {
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EXPECT_TRUE(fmt::detail::is_string<TypeParam*>::value);
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EXPECT_TRUE(fmt::detail::is_string<const TypeParam*>::value);
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EXPECT_TRUE(fmt::detail::is_string<TypeParam[2]>::value);
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EXPECT_TRUE(fmt::detail::is_string<const TypeParam[2]>::value);
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EXPECT_TRUE(fmt::detail::is_string<std::basic_string<TypeParam>>::value);
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EXPECT_TRUE(fmt::detail::is_string<fmt::basic_string_view<TypeParam>>::value);
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EXPECT_TRUE(
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fmt::detail::is_string<derived_from_string_view<TypeParam>>::value);
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using fmt_string_view = fmt::detail::std_string_view<TypeParam>;
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EXPECT_TRUE(std::is_empty<fmt_string_view>::value !=
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fmt::detail::is_string<fmt_string_view>::value);
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EXPECT_TRUE(fmt::detail::is_string<test_ns::test_string<TypeParam>>::value);
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EXPECT_FALSE(fmt::detail::is_string<test_ns::non_string>::value);
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}
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// std::is_constructible is broken in MSVC until version 2015.
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#if !FMT_MSC_VER || FMT_MSC_VER >= 1900
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struct explicitly_convertible_to_wstring_view {
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explicit operator fmt::wstring_view() const { return L"foo"; }
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};
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TEST(xchar_test, format_explicitly_convertible_to_wstring_view) {
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EXPECT_EQ(L"foo",
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fmt::format(L"{}", explicitly_convertible_to_wstring_view()));
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}
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#endif
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TEST(xchar_test, format) {
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EXPECT_EQ(L"42", fmt::format(L"{}", 42));
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EXPECT_EQ(L"4.2", fmt::format(L"{}", 4.2));
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EXPECT_EQ(L"abc", fmt::format(L"{}", L"abc"));
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EXPECT_EQ(L"z", fmt::format(L"{}", L'z'));
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EXPECT_THROW(fmt::format(L"{:*\x343E}", 42), fmt::format_error);
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EXPECT_EQ(L"true", fmt::format(L"{}", true));
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EXPECT_EQ(L"a", fmt::format(L"{0}", 'a'));
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EXPECT_EQ(L"a", fmt::format(L"{0}", L'a'));
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EXPECT_EQ(L"Cyrillic letter \x42e",
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fmt::format(L"Cyrillic letter {}", L'\x42e'));
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EXPECT_EQ(L"abc1", fmt::format(L"{}c{}", L"ab", 1));
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}
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TEST(xchar_test, is_formattable) {
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static_assert(!fmt::is_formattable<const wchar_t*>::value, "");
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}
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TEST(xchar_test, compile_time_string) {
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#if defined(FMT_USE_STRING_VIEW) && __cplusplus >= 201703L
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EXPECT_EQ(L"42", fmt::format(FMT_STRING(std::wstring_view(L"{}")), 42));
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#endif
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}
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#if __cplusplus > 201103L
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struct custom_char {
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int value;
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custom_char() = default;
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template <typename T>
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constexpr custom_char(T val) : value(static_cast<int>(val)) {}
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operator int() const { return value; }
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};
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int to_ascii(custom_char c) { return c; }
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FMT_BEGIN_NAMESPACE
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template <> struct is_char<custom_char> : std::true_type {};
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FMT_END_NAMESPACE
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TEST(xchar_test, format_custom_char) {
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const custom_char format[] = {'{', '}', 0};
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auto result = fmt::format(format, custom_char('x'));
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EXPECT_EQ(result.size(), 1);
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EXPECT_EQ(result[0], custom_char('x'));
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}
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#endif
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// Convert a char8_t string to std::string. Otherwise GTest will insist on
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// inserting `char8_t` NTBS into a `char` stream which is disabled by P1423.
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template <typename S> std::string from_u8str(const S& str) {
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return std::string(str.begin(), str.end());
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}
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TEST(xchar_test, format_utf8_precision) {
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using str_type = std::basic_string<fmt::detail::char8_type>;
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auto format =
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str_type(reinterpret_cast<const fmt::detail::char8_type*>(u8"{:.4}"));
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auto str = str_type(reinterpret_cast<const fmt::detail::char8_type*>(
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u8"caf\u00e9s")); // cafés
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auto result = fmt::format(format, str);
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EXPECT_EQ(fmt::detail::compute_width(result), 4);
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EXPECT_EQ(result.size(), 5);
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EXPECT_EQ(from_u8str(result), from_u8str(str.substr(0, 5)));
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}
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TEST(xchar_test, format_to) {
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auto buf = std::vector<wchar_t>();
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fmt::format_to(std::back_inserter(buf), L"{}{}", 42, L'\0');
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EXPECT_STREQ(buf.data(), L"42");
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}
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TEST(xchar_test, vformat_to) {
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using wcontext = fmt::wformat_context;
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fmt::basic_format_arg<wcontext> warg = fmt::detail::make_arg<wcontext>(42);
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auto wargs = fmt::basic_format_args<wcontext>(&warg, 1);
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auto w = std::wstring();
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fmt::vformat_to(std::back_inserter(w), L"{}", wargs);
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EXPECT_EQ(L"42", w);
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w.clear();
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fmt::vformat_to(std::back_inserter(w), FMT_STRING(L"{}"), wargs);
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EXPECT_EQ(L"42", w);
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}
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TEST(format_test, wide_format_to_n) {
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wchar_t buffer[4];
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buffer[3] = L'x';
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auto result = fmt::format_to_n(buffer, 3, L"{}", 12345);
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EXPECT_EQ(5u, result.size);
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EXPECT_EQ(buffer + 3, result.out);
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EXPECT_EQ(L"123x", fmt::wstring_view(buffer, 4));
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buffer[0] = L'x';
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buffer[1] = L'x';
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buffer[2] = L'x';
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result = fmt::format_to_n(buffer, 3, L"{}", L'A');
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EXPECT_EQ(1u, result.size);
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EXPECT_EQ(buffer + 1, result.out);
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EXPECT_EQ(L"Axxx", fmt::wstring_view(buffer, 4));
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result = fmt::format_to_n(buffer, 3, L"{}{} ", L'B', L'C');
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EXPECT_EQ(3u, result.size);
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EXPECT_EQ(buffer + 3, result.out);
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EXPECT_EQ(L"BC x", fmt::wstring_view(buffer, 4));
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}
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#if FMT_USE_USER_DEFINED_LITERALS
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TEST(xchar_test, format_udl) {
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using namespace fmt::literals;
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EXPECT_EQ(L"{}c{}"_format(L"ab", 1), fmt::format(L"{}c{}", L"ab", 1));
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}
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TEST(xchar_test, named_arg_udl) {
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using namespace fmt::literals;
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auto udl_a =
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fmt::format(L"{first}{second}{first}{third}", L"first"_a = L"abra",
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L"second"_a = L"cad", L"third"_a = 99);
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EXPECT_EQ(
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fmt::format(L"{first}{second}{first}{third}", fmt::arg(L"first", L"abra"),
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fmt::arg(L"second", L"cad"), fmt::arg(L"third", 99)),
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udl_a);
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}
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#endif // FMT_USE_USER_DEFINED_LITERALS
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TEST(xchar_test, print) {
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// Check that the wide print overload compiles.
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if (fmt::detail::const_check(false)) fmt::print(L"test");
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}
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TEST(xchar_test, join) {
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int v[3] = {1, 2, 3};
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EXPECT_EQ(fmt::format(L"({})", fmt::join(v, v + 3, L", ")), L"(1, 2, 3)");
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auto t = std::tuple<wchar_t, int, float>('a', 1, 2.0f);
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EXPECT_EQ(fmt::format(L"({})", fmt::join(t, L", ")), L"(a, 1, 2)");
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}
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enum streamable_enum {};
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std::wostream& operator<<(std::wostream& os, streamable_enum) {
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return os << L"streamable_enum";
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}
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enum unstreamable_enum {};
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TEST(xchar_test, enum) {
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EXPECT_EQ(L"streamable_enum", fmt::format(L"{}", streamable_enum()));
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EXPECT_EQ(L"0", fmt::format(L"{}", unstreamable_enum()));
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}
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TEST(xchar_test, sign_not_truncated) {
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wchar_t format_str[] = {
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L'{', L':',
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'+' | static_cast<wchar_t>(1 << fmt::detail::num_bits<char>()), L'}', 0};
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EXPECT_THROW(fmt::format(format_str, 42), fmt::format_error);
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}
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namespace fake_qt {
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class QString {
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public:
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QString(const wchar_t* s) : s_(s) {}
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const wchar_t* utf16() const FMT_NOEXCEPT { return s_.data(); }
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int size() const FMT_NOEXCEPT { return static_cast<int>(s_.size()); }
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private:
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std::wstring s_;
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};
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fmt::basic_string_view<wchar_t> to_string_view(const QString& s) FMT_NOEXCEPT {
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return {s.utf16(), static_cast<size_t>(s.size())};
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}
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} // namespace fake_qt
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TEST(format_test, format_foreign_strings) {
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using fake_qt::QString;
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EXPECT_EQ(fmt::format(QString(L"{}"), 42), L"42");
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EXPECT_EQ(fmt::format(QString(L"{}"), QString(L"42")), L"42");
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}
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TEST(xchar_test, chrono) {
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auto tm = std::tm();
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tm.tm_year = 116;
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tm.tm_mon = 3;
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tm.tm_mday = 25;
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tm.tm_hour = 11;
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tm.tm_min = 22;
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tm.tm_sec = 33;
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EXPECT_EQ(fmt::format("The date is {:%Y-%m-%d %H:%M:%S}.", tm),
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"The date is 2016-04-25 11:22:33.");
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EXPECT_EQ(L"42s", fmt::format(L"{}", std::chrono::seconds(42)));
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EXPECT_EQ(fmt::format(L"{:%F}", tm), L"2016-04-25");
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EXPECT_EQ(fmt::format(L"{:%T}", tm), L"11:22:33");
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}
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std::wstring system_wcsftime(const std::wstring& format, const std::tm* timeptr,
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size_t maxsize = 1024) {
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std::vector<wchar_t> output(maxsize);
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auto size =
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std::wcsftime(output.data(), output.size(), format.c_str(), timeptr);
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return std::wstring(output.data(), size);
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}
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TEST(chrono_test, time_point) {
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auto t1 = std::chrono::system_clock::now();
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std::vector<std::wstring> spec_list = {
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L"%%", L"%n", L"%t", L"%Y", L"%EY", L"%y", L"%Oy", L"%Ey",
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L"%C", L"%EC", L"%G", L"%g", L"%b", L"%h", L"%B", L"%m",
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L"%Om", L"%U", L"%OU", L"%W", L"%OW", L"%V", L"%OV", L"%j",
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L"%d", L"%Od", L"%e", L"%Oe", L"%a", L"%A", L"%w", L"%Ow",
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L"%u", L"%Ou", L"%H", L"%OH", L"%I", L"%OI", L"%M", L"%OM",
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L"%S", L"%OS", L"%c", L"%Ec", L"%x", L"%Ex", L"%X", L"%EX",
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L"%D", L"%F", L"%r", L"%R", L"%T", L"%p", L"%z", L"%Z"};
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spec_list.push_back(L"%Y-%m-%d %H:%M:%S");
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for (const auto& spec : spec_list) {
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auto t = std::chrono::system_clock::to_time_t(t1);
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auto tm = *std::localtime(&t);
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auto sys_output = system_wcsftime(spec, &tm);
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auto fmt_spec = fmt::format(L"{{:{}}}", spec);
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EXPECT_EQ(sys_output, fmt::format(fmt_spec, t1));
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EXPECT_EQ(sys_output, fmt::format(fmt_spec, tm));
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}
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}
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TEST(xchar_test, color) {
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EXPECT_EQ(fmt::format(fg(fmt::rgb(255, 20, 30)), L"rgb(255,20,30) wide"),
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L"\x1b[38;2;255;020;030mrgb(255,20,30) wide\x1b[0m");
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}
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TEST(xchar_test, ostream) {
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std::wostringstream wos;
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fmt::print(wos, L"Don't {}!", L"panic");
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EXPECT_EQ(L"Don't panic!", wos.str());
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}
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TEST(xchar_test, to_wstring) { EXPECT_EQ(L"42", fmt::to_wstring(42)); }
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#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
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template <typename Char> struct numpunct : std::numpunct<Char> {
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protected:
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Char do_decimal_point() const override { return '?'; }
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std::string do_grouping() const override { return "\03"; }
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Char do_thousands_sep() const override { return '~'; }
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};
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template <typename Char> struct no_grouping : std::numpunct<Char> {
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protected:
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Char do_decimal_point() const override { return '.'; }
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std::string do_grouping() const override { return ""; }
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Char do_thousands_sep() const override { return ','; }
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};
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template <typename Char> struct special_grouping : std::numpunct<Char> {
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protected:
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Char do_decimal_point() const override { return '.'; }
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std::string do_grouping() const override { return "\03\02"; }
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Char do_thousands_sep() const override { return ','; }
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};
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template <typename Char> struct small_grouping : std::numpunct<Char> {
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protected:
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Char do_decimal_point() const override { return '.'; }
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std::string do_grouping() const override { return "\01"; }
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Char do_thousands_sep() const override { return ','; }
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};
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TEST(locale_test, localized_double) {
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auto loc = std::locale(std::locale(), new numpunct<char>());
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EXPECT_EQ("1?23", fmt::format(loc, "{:L}", 1.23));
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EXPECT_EQ("1?230000", fmt::format(loc, "{:Lf}", 1.23));
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EXPECT_EQ("1~234?5", fmt::format(loc, "{:L}", 1234.5));
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EXPECT_EQ("12~000", fmt::format(loc, "{:L}", 12000.0));
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}
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TEST(locale_test, format) {
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auto loc = std::locale(std::locale(), new numpunct<char>());
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EXPECT_EQ("1234567", fmt::format(std::locale(), "{:L}", 1234567));
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EXPECT_EQ("1~234~567", fmt::format(loc, "{:L}", 1234567));
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EXPECT_EQ("-1~234~567", fmt::format(loc, "{:L}", -1234567));
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EXPECT_EQ("-256", fmt::format(loc, "{:L}", -256));
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fmt::format_arg_store<fmt::format_context, int> as{1234567};
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EXPECT_EQ("1~234~567", fmt::vformat(loc, "{:L}", fmt::format_args(as)));
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auto s = std::string();
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fmt::format_to(std::back_inserter(s), loc, "{:L}", 1234567);
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EXPECT_EQ("1~234~567", s);
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auto no_grouping_loc = std::locale(std::locale(), new no_grouping<char>());
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EXPECT_EQ("1234567", fmt::format(no_grouping_loc, "{:L}", 1234567));
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auto special_grouping_loc =
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std::locale(std::locale(), new special_grouping<char>());
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EXPECT_EQ("1,23,45,678", fmt::format(special_grouping_loc, "{:L}", 12345678));
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EXPECT_EQ("12,345", fmt::format(special_grouping_loc, "{:L}", 12345));
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auto small_grouping_loc =
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std::locale(std::locale(), new small_grouping<char>());
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EXPECT_EQ("4,2,9,4,9,6,7,2,9,5",
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fmt::format(small_grouping_loc, "{:L}", max_value<uint32_t>()));
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}
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TEST(locale_test, format_detault_align) {
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auto loc = std::locale({}, new special_grouping<char>());
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EXPECT_EQ(" 12,345", fmt::format(loc, "{:8L}", 12345));
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}
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TEST(locale_test, format_plus) {
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auto loc = std::locale({}, new special_grouping<char>());
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EXPECT_EQ("+100", fmt::format(loc, "{:+L}", 100));
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}
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TEST(locale_test, wformat) {
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auto loc = std::locale(std::locale(), new numpunct<wchar_t>());
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EXPECT_EQ(L"1234567", fmt::format(std::locale(), L"{:L}", 1234567));
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EXPECT_EQ(L"1~234~567", fmt::format(loc, L"{:L}", 1234567));
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using wcontext = fmt::buffer_context<wchar_t>;
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fmt::format_arg_store<wcontext, int> as{1234567};
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EXPECT_EQ(L"1~234~567",
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fmt::vformat(loc, L"{:L}", fmt::basic_format_args<wcontext>(as)));
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EXPECT_EQ(L"1234567", fmt::format(std::locale("C"), L"{:L}", 1234567));
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auto no_grouping_loc = std::locale(std::locale(), new no_grouping<wchar_t>());
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EXPECT_EQ(L"1234567", fmt::format(no_grouping_loc, L"{:L}", 1234567));
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auto special_grouping_loc =
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std::locale(std::locale(), new special_grouping<wchar_t>());
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EXPECT_EQ(L"1,23,45,678",
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fmt::format(special_grouping_loc, L"{:L}", 12345678));
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auto small_grouping_loc =
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std::locale(std::locale(), new small_grouping<wchar_t>());
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EXPECT_EQ(L"4,2,9,4,9,6,7,2,9,5",
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fmt::format(small_grouping_loc, L"{:L}", max_value<uint32_t>()));
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|
}
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|
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TEST(locale_test, double_formatter) {
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|
auto loc = std::locale(std::locale(), new special_grouping<char>());
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|
auto f = fmt::formatter<int>();
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|
auto parse_ctx = fmt::format_parse_context("L");
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|
f.parse(parse_ctx);
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|
char buf[10] = {};
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|
fmt::basic_format_context<char*, char> format_ctx(
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|
buf, {}, fmt::detail::locale_ref(loc));
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|
*f.format(12345, format_ctx) = 0;
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|
EXPECT_STREQ("12,345", buf);
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|
}
|
|
|
|
FMT_BEGIN_NAMESPACE
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|
template <class charT> struct formatter<std::complex<double>, charT> {
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|
private:
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|
detail::dynamic_format_specs<char> specs_;
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|
|
|
public:
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|
FMT_CONSTEXPR typename basic_format_parse_context<charT>::iterator parse(
|
|
basic_format_parse_context<charT>& ctx) {
|
|
using handler_type =
|
|
detail::dynamic_specs_handler<basic_format_parse_context<charT>>;
|
|
detail::specs_checker<handler_type> handler(handler_type(specs_, ctx),
|
|
detail::type::string_type);
|
|
auto it = parse_format_specs(ctx.begin(), ctx.end(), handler);
|
|
detail::parse_float_type_spec(specs_, ctx.error_handler());
|
|
return it;
|
|
}
|
|
|
|
template <class FormatContext>
|
|
typename FormatContext::iterator format(const std::complex<double>& c,
|
|
FormatContext& ctx) {
|
|
detail::handle_dynamic_spec<detail::precision_checker>(
|
|
specs_.precision, specs_.precision_ref, ctx);
|
|
auto specs = std::string();
|
|
if (specs_.precision > 0) specs = fmt::format(".{}", specs_.precision);
|
|
if (specs_.type == presentation_type::fixed_lower) specs += 'f';
|
|
auto real = fmt::format(ctx.locale().template get<std::locale>(),
|
|
fmt::runtime("{:" + specs + "}"), c.real());
|
|
auto imag = fmt::format(ctx.locale().template get<std::locale>(),
|
|
fmt::runtime("{:" + specs + "}"), c.imag());
|
|
auto fill_align_width = std::string();
|
|
if (specs_.width > 0) fill_align_width = fmt::format(">{}", specs_.width);
|
|
return format_to(ctx.out(), runtime("{:" + fill_align_width + "}"),
|
|
c.real() != 0 ? fmt::format("({}+{}i)", real, imag)
|
|
: fmt::format("{}i", imag));
|
|
}
|
|
};
|
|
FMT_END_NAMESPACE
|
|
|
|
TEST(locale_test, complex) {
|
|
std::string s = fmt::format("{}", std::complex<double>(1, 2));
|
|
EXPECT_EQ(s, "(1+2i)");
|
|
EXPECT_EQ(fmt::format("{:.2f}", std::complex<double>(1, 2)), "(1.00+2.00i)");
|
|
EXPECT_EQ(fmt::format("{:8}", std::complex<double>(1, 2)), " (1+2i)");
|
|
}
|
|
|
|
#endif // FMT_STATIC_THOUSANDS_SEPARATOR
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