dynarmic/test/format-test.cc
Lioncash d4c6fa3122 Squashed 'externals/fmt/' changes from 9bdd1596c..cd4af11ef
cd4af11ef Update version
1ebc2f7cc Bump version
f4c997062 Fix changelog
72920ba30 Update changelog
0907c08ae Fix handling of default alignmment with locale (#1801)
37c8f4eaf Don't use 128 bit integers with clang-cl (#1800)
eaaaec999 Workaround a bug in msvc
ccf8561cb Workaround broken numeric_limites, part 2 (#1787)
0cc73ebf7 Report error on missing named argument (#1796)
33efc3c94 Fix handling of iterators in locale-specific formatting (#1782)
b9d749095 Update version
86b63bb71 Bump version
cbf6be960 Update changelog
229ee9b46 Workaround broken numeric_limits (#1725)
2b7a146fa Fix a regression in handling digit separators (#1782)
89d0c7124 Fix compatibility with CMake 3.4 (#1779)
f19b1a521 Update version
5c67fefb2 Fix a changelog entry
1d2a556e1 Fix undefined reference error
04c9b62fb Merge release branch
6be6762e5 Fix date
f1dd2eb3c Bump version
fbf3b943c Workaround a bug in gcc
a29a01d30 Fix docs
9f0b3afb7 Bump version in namespace
86b2f99f8 Fix the docs
c472ff12d Update version
5173a76ba Update version
1614af352 Minor corrections in the changelog
569a9b3a7 Bump version
4e7e3c65a Update docs
0f7a6bfa1 Add a section on std::format compatibility
4faec5a5e Update README.rst
7dbc8ac71 Update changelog
c87dd746f Update changelog
372175caf Revert changelog changes
904754876 Add ClickHouse to the list of projects (#1751)
d30bca64e Revert changelog conversion since GFM is not supported there
d6047cdc4 Update changelog
810241b36 Convert changlog to markdown
661c47473 Rename changelog
7c33059fa Update ChangeLog.rst
9e20883ab Update README.rst
41899d522 Update changelog
f42f45908 Update changelog
2381df654 Update readme
7ae816563 Update README.rst
c56cf3d07 Update changelog and readme
01309a34a Deprecate arg_formatter
a62d06055 Update changelog
23e3a2eee Update changelog
d8e0554b9 Disable numeric formatting by default
1e8eea4f4 Update changelog
44bd5384a Fix formatting
20e19387a Update changelog
56fed7814 FMT_NUMERIC_ALIGN -> FMT_DEPRECATED_NUMERIC_ALIGN
56e63078f Make the n specifier an opt-in
31ce6bc70 Fix a conversion warning with Clang10 on Windows (#1750)
c9c5b90da Fix a typo. Thanks Tracy Chapman from TripleChecker
1f3f84631 Fix a typo
5de62af60 Fix possible infinite recursion in FMT_ASSERT (#1744)
cbddab2fe Use consistent include style
f69b6eaab Add a simple buffered stream with no sync
ba363b3a2 Use digit pairs as in unrolledlut
a6f8e7d86 Update changelog
e753244ab Update changelog
98a7a8b40 Update changelog and disable internal
3135d95fd Don't use non-portable attribute
8630a8f5f Tweak the docs
cc3a88e6b Extract docs from compile.h
79c4b6bd7 Apply clang-format
d130ee070 Document format string compilation
d0f90b5be Spelling fixes
6e080660d Update README.rst
31c3a2426 Spelling fixes
613b3b459 Spelling fixes
978521bb8 Fix a compile error introduced in #1738
4e94c649f Deprecate compile
1a83443e6 Add user-defined type support to compilation
8bef1c3b3 Tweaks for EDG based compilers (Intel, nVidia, MCST/Elbrus, etc).
b287c37c6 Do not use -Wl,--as-needed with emscripten.
2cac8a9d2 Reintroduce UDT support to fmt::to_string and test ADL
9a4cc8842 Add FMT_COMPILE support to format_to
5ddf9ee1b Streamline default FP formatting
0b3a83f7f Update README.rst
5aa5c9873 Added  #define WIN32_LEAN_AND_MEAN before including windows.h (#1729)
397ad1bec Optimize common case
7431165f3 Make to_string bypass format
ee4d4c7fd Inline compiled format
ab2f8484e Finish text::format
e900d735b Re-enable assert in format_decimal
f4de7b684 Fix ambiguity
1f8f5450b Reuse format_decimal
d702a68df Fix formatting of bool with FMT_COMPILE and add more tests
e956a14e9 Use write instead of format_int in to_string
98dcc251e Undo branching reduction
5b8641ddd Undo branching reduction
8c88abde6 Fix sign handling in 'L'
23b976a61 Reduce branching
9edee0e72 Optimize small string parsing
a909d42b7 Fix a warning
16637341b Enable compilation for all types
2d71d7e03 Add a simple format string compilation API
d259fcfb0 Tweak comments
704ed557a Move project in order to solve a CMake warning
8603bd20d Update README.rst
547f12ae6 Fix a warning (#1722)
f904e8a1b c++11 use formatting user-defined types (#1721)
100e8af08 Update README.rst
c11d0f056 Update README.rst
2453ee576 Improve default formatting
47ae52155 MINGW cross compiler fixes
936a1833c Add default_arg_formatter
f2c9cb624 Fix a UB
d3107f855 Cleanup arg_formatter_base
5e7c70e20 Simplify arg_formatter_base
38cc68b3e Inline visitor
6732ea500 Make symbols readable
57ddc77ce Make advance_to a noop for back_insert_iterator
50bad7d62 Optimize format string parsing
8f7a824e4 Inline visit
f11e96870 Optimize format string parsing
09737dd83 Optimize format handler
d9e3d6e6e Move format_handler to detail
795b47a7b Fix a warning (#1712)
95c6ac0cc fix typo which caused the loss of the counting information when using a printf context with a truncating_iterator
21409cfdd Fix warnings
88c8d534e Move digits10 to where they belong and add comments
0f3eaeac0 Fix a warning
344218510 Ignore /doc/node_modules directory
16aec0617 Cleanup arg_formatter_base
1e1193590 Fix format_decimal overloads
0893c9c2e Inline parse_format_string
3245145a4 Remove undocumented buffer_range and output_range
57fc44907 Increase VM disk size
7d22bebb6 Remove uses of buffer_range
8f2b5fe74 Don't install sphinx cache files
f095c67b6 Remove uses of buffer_range
5aabf1f71 Simplify copy_str
19c5b5d15 Simplify arg_formatter
519571ede Simplify arg_formatter_base
ac8dfd841 Improve handling of separators
2c6165a22 Reduce the number of comparisons
28639969e Use memcpy for copying digits
f5fa1dee5 Support custom FMT_INC_DIR in pkgconfig and cmake configs (#1702)
51bf9cfac Fix Mingw support
1a716caf5 Optimize common case
98d4bbf81 Update README.rst
8c8f74a87 fix zero flag for char types and make zero flag ignored if a precision is specified
bc1b89da2 Temporarily revert parsing changes
a7fb321ac Remove a redundant branch
8cadb9650 fix max/min macro (#1697)
297c3b2ed Fix an example (thanks Alexey Kuzmenko)
943532fec Make ostream formatter work with compile-time format strings (#1692)
bd8804019 Update README.rst
f230300ac Knuth is using fmt library (#1691)
a265e25b7 Optimize small string parsing
2aa2526f6 Optimize small string concatenation
8d78045e7 Move void_t to where it's used
7aafa6bc6 Update analytics
c66aae165 Adding sentinel support to fmt::join(). (#1689)
6d66de380 Add c specifier support to integral types (#1652)
6b219a58d fix interaction of space flag and '+' flag, as well as '-' flag and '0' flag (#1687)
eee2023c2 Update signatures
c5ed73aab Add fmt::detail::buffer to the docs (#704)
ea1cd9638 Fix apidoc
d3964d7b1 Merge branch 'master' of github.com:fmtlib/fmt
d18c6723a Update docs
96c18b26c make plus flag for printf not be ignored for char argument (#1683)
ba25baeb9 Apply doc patch to 6.2.1
981b517cc nested replacement fields may omit arg_id (#1681)
922ea924b Make dynamic_format_arg_store reusable and add reserve() (#1677)
e0d98923c Update version
806926537 internal -> detail (#1538)
963ee0831 Simplify named arguments
02a6fe59f Named arguments go brrr
de290f5c4 Ditch internal::arg_map
d0623de51 Bump version
73e335ed3 Make implicit capture explicit for C++20 (#1669)
b4d46e398 Update changelog
a182f7341 Update changelog
68201831a Support named args in dynamic_format_arg_store (#1655). (#1663)
7f723fbcb Consistently namespace qualify size_t
c06851456 Purge basic_writer
2f05054dd Purge basic_writer
f0ce21164 Revert enum change
44639b11f Fix some warnings (#1667)
1c86a99e8 Purge basic_writer
8f511fc12 Make copyfmt not throw (#1666)
59fe455f3 Remove compatibility stubs
b0f47a13e Separate nonfinite formatting
d6cea50d0 Remove deprecated APIs
40bc7163f Move FMT_MAYBE_UNUSED to where it's actually used
080e44d0b Fix inconsistent type detection (#1662)
7e57cace5 Exclude std::abort from compilation when compiling CUDA with Clang (#1661)
7b66e2f21 Inherit arg_formatter_base from basic_writer
bab3f5800 Refactor pointer formatting
9cc7edfdd Move int_writer to the namespace scope
8d9d528bf Improve handling of alignment
8efd1a8ef Improve handling of alignment
a71bc9c82 Use '0' fill with numeric align for consistency with std::format
60d85d598 Suppress ubsan warning
c3099beb6 Cleanup
cbb4cb899 Remove undocumented deprecated APIs
b85e9ac38 Simplify vformat_to
e3710ab97 FMT_CONSTEXPR -> constexpr
d59751f0f Update date formatting example to use threadsafe localtime
d6abb2fa0 Reduce library size
e9fdea90b Update README.rst
44b6584f2 Update README.rst
78f041ab5 build: Fix installation paths
7ca89bf87 Reduce template bloat in write_int
3c114d091 Fix a shadowing warning (#1658)
e2ef12a8c Allow to avoid inclusion of os.cc in fmt target
bca82719a Pass iterator by value
99da38962 Make write_padded non-members
f19d66794 Bump fuzzer allocation limit
3e6984761 Reduce branching in write_padded
9ac1eebd4 Reduce library size
e2ff91067 Replace FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION  with fmt-specific macro (#1650)
f2ed03b91 Fix a warning (#1649)
9dde9f013 Reduce library size
b1af642d1 Reduce library size
4a617f25c Clarify encoding conversion in chrono
6f435f55c Improve compile time by using extern template (#1452)
cb475cb88 Clarify why we don't check argument id
1e1ac6e96 Check dynamic width/precision id at compile time (#1614)
e51c449fe Revert "Check dynamic widht/precision id at compile time (#1614)"
0463665ef Don't access a C string past precision in printf (#1595)
7d748a6f8 Check dynamic widht/precision id at compile time (#1614)
2b75bd7ce Get rid of do_check_format_string
4a1d5931c Simplify udl_formatter with FMT_STRING
811b0f905 Enable compile-time error tests
450e8eed9 Fix markup
b8fbcec1b Clarify formatter reuse
56bc86ffa Suppress bogus MSVC analysis warnings
3f79357ef Fix a recent regression in handling max packed arguments
8a11148f9 Add Facebook Folly to the list of projects
e371e8b68 Tweak readme
813732fed Improve readme formatting
3670d5b3f README: add vectorized.io/redpanda in the list of users
9e2ad7cf6 Add windows terminal to the projects using {fmt}
63479c851 Use a delegating ctor and add inlines
5944fcad3 Remove remaining wchar_t instantiation
e253b371b Don't generate RTTI for allocator
0c86f467b Fix build on ancient gcc
1929df4bc Simplify format_args
a13822181 Always inline arg_data functions
04e0dfd4b Always inline value ctors
04cde756b Simplify checks
c9a57b9a8 Fix incorrect assumptions about nul termination
f46f5ecaf Reenable constexpr _compile on GCC 9
6e8d7e277 Don't use constexpr on Intel compiler (#1628)
567ed03f8 Merge arg overloads and cleanup
c3fa33314 Remove warning in core.h with when compiling with gcc and -Wshadow
84898b462 Remove warning in format.h when compiling with gcc and -Wshadow
538d83fd0 Cleanup named arguments
8a4630686 Improve handling of named arguments
a9d62d3f3 Add check for CompiledFormat to avoid ambiguous call
fdcf7870a Add stack-based named argument storage
5899267c4 Fix a clang-tidy warning
07b4c246e Fix a typo
e99809f29 Fix ostream support in sprintf (#1631)
3cd5179f3 Fixed clang tidy warning -multiple declarations in a single statement reduces readability
7404e33a7 Fix clang warning about explicit ctor
3aab2171e Clean up basic_format_args
7645ca072 Clean up printf
e30d8391e Suppress an MSVC warning (#1622)
8cd8ef03e Simplify warning suppression
bbb6b357c Add floating-point L specifier (#1624)
36ea32640 Suppress a bogus MSVC warning
141a00d64 Define FMT_EXTERN_TEMPLATE_API on export
3860edc5d Bump version
7d01859ef Fix handling of unsigned char strings in printf
63b23e786 Merge branch 'master' of github.com:fmtlib/fmt
4999796c1 Fix the docs
34b3f7b7a Avoid windows issue with min() max() macros
27e3c0fe9 Update signature in the docs

git-subtree-dir: externals/fmt
git-subtree-split: cd4af11efc9c622896a3e4cb599fa28668ca3d05
2020-09-19 14:25:26 -04:00

2469 lines
91 KiB
C++

// 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 <stdint.h>
#include <cctype>
#include <cfloat>
#include <climits>
#include <cmath>
#include <cstring>
#include <list>
#include <memory>
#include <string>
// Check if fmt/format.h compiles with windows.h included before it.
#ifdef _WIN32
# include <windows.h>
#endif
// Check if fmt/format.h compiles with the X11 index macro defined.
#define index(x, y) no nice things
#include "fmt/color.h"
#include "fmt/format.h"
#undef index
#include "gmock.h"
#include "gtest-extra.h"
#include "mock-allocator.h"
#include "util.h"
#undef ERROR
using fmt::basic_memory_buffer;
using fmt::format;
using fmt::format_error;
using fmt::memory_buffer;
using fmt::string_view;
using fmt::wmemory_buffer;
using fmt::wstring_view;
using fmt::detail::max_value;
using testing::Return;
using testing::StrictMock;
namespace {
#if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 408
template <typename Char, typename T> bool check_enabled_formatter() {
static_assert(std::is_default_constructible<fmt::formatter<T, Char>>::value,
"");
return true;
}
template <typename Char, typename... T> void check_enabled_formatters() {
auto dummy = {check_enabled_formatter<Char, T>()...};
(void)dummy;
}
TEST(FormatterTest, TestFormattersEnabled) {
check_enabled_formatters<char, bool, char, signed char, unsigned char, short,
unsigned short, int, unsigned, long, unsigned long,
long long, unsigned long long, float, double,
long double, void*, const void*, char*, const char*,
std::string, std::nullptr_t>();
check_enabled_formatters<wchar_t, bool, wchar_t, signed char, unsigned char,
short, unsigned short, int, unsigned, long,
unsigned long, long long, unsigned long long, float,
double, long double, void*, const void*, wchar_t*,
const wchar_t*, std::wstring, std::nullptr_t>();
}
#endif
// Format value using the standard library.
template <typename Char, typename T>
void std_format(const T& value, std::basic_string<Char>& result) {
std::basic_ostringstream<Char> os;
os << value;
result = os.str();
}
#ifdef __MINGW32__
// Workaround a bug in formatting long double in MinGW.
void std_format(long double value, std::string& result) {
char buffer[100];
safe_sprintf(buffer, "%Lg", value);
result = buffer;
}
void std_format(long double value, std::wstring& result) {
wchar_t buffer[100];
swprintf(buffer, L"%Lg", value);
result = buffer;
}
#endif
} // namespace
struct uint32_pair {
uint32_t u[2];
};
TEST(UtilTest, BitCast) {
auto s = fmt::detail::bit_cast<uint32_pair>(uint64_t{42});
EXPECT_EQ(fmt::detail::bit_cast<uint64_t>(s), 42ull);
s = fmt::detail::bit_cast<uint32_pair>(uint64_t(~0ull));
EXPECT_EQ(fmt::detail::bit_cast<uint64_t>(s), ~0ull);
}
TEST(UtilTest, Increment) {
char s[10] = "123";
increment(s);
EXPECT_STREQ("124", s);
s[2] = '8';
increment(s);
EXPECT_STREQ("129", s);
increment(s);
EXPECT_STREQ("130", s);
s[1] = s[2] = '9';
increment(s);
EXPECT_STREQ("200", s);
}
TEST(UtilTest, ParseNonnegativeInt) {
if (max_value<int>() != static_cast<int>(static_cast<unsigned>(1) << 31)) {
fmt::print("Skipping parse_nonnegative_int test\n");
return;
}
fmt::string_view s = "10000000000";
auto begin = s.begin(), end = s.end();
EXPECT_THROW_MSG(
parse_nonnegative_int(begin, end, fmt::detail::error_handler()),
fmt::format_error, "number is too big");
s = "2147483649";
begin = s.begin();
end = s.end();
EXPECT_THROW_MSG(
parse_nonnegative_int(begin, end, fmt::detail::error_handler()),
fmt::format_error, "number is too big");
}
TEST(IteratorTest, CountingIterator) {
fmt::detail::counting_iterator it;
auto prev = it++;
EXPECT_EQ(prev.count(), 0);
EXPECT_EQ(it.count(), 1);
}
TEST(IteratorTest, TruncatingIterator) {
char* p = nullptr;
fmt::detail::truncating_iterator<char*> it(p, 3);
auto prev = it++;
EXPECT_EQ(prev.base(), p);
EXPECT_EQ(it.base(), p + 1);
}
TEST(IteratorTest, TruncatingBackInserter) {
std::string buffer;
auto bi = std::back_inserter(buffer);
fmt::detail::truncating_iterator<decltype(bi)> it(bi, 2);
*it++ = '4';
*it++ = '2';
*it++ = '1';
EXPECT_EQ(buffer.size(), 2);
EXPECT_EQ(buffer, "42");
}
TEST(IteratorTest, IsOutputIterator) {
EXPECT_TRUE(fmt::detail::is_output_iterator<char*>::value);
EXPECT_FALSE(fmt::detail::is_output_iterator<const char*>::value);
EXPECT_FALSE(fmt::detail::is_output_iterator<std::string>::value);
EXPECT_TRUE(fmt::detail::is_output_iterator<
std::back_insert_iterator<std::string>>::value);
EXPECT_TRUE(fmt::detail::is_output_iterator<std::string::iterator>::value);
EXPECT_FALSE(
fmt::detail::is_output_iterator<std::string::const_iterator>::value);
EXPECT_FALSE(fmt::detail::is_output_iterator<std::list<char>>::value);
EXPECT_TRUE(
fmt::detail::is_output_iterator<std::list<char>::iterator>::value);
EXPECT_FALSE(
fmt::detail::is_output_iterator<std::list<char>::const_iterator>::value);
EXPECT_FALSE(fmt::detail::is_output_iterator<uint32_pair>::value);
}
TEST(MemoryBufferTest, Ctor) {
basic_memory_buffer<char, 123> buffer;
EXPECT_EQ(static_cast<size_t>(0), buffer.size());
EXPECT_EQ(123u, buffer.capacity());
}
static void check_forwarding(mock_allocator<int>& alloc,
allocator_ref<mock_allocator<int>>& ref) {
int mem;
// Check if value_type is properly defined.
allocator_ref<mock_allocator<int>>::value_type* ptr = &mem;
// Check forwarding.
EXPECT_CALL(alloc, allocate(42)).WillOnce(testing::Return(ptr));
ref.allocate(42);
EXPECT_CALL(alloc, deallocate(ptr, 42));
ref.deallocate(ptr, 42);
}
TEST(AllocatorTest, allocator_ref) {
StrictMock<mock_allocator<int>> alloc;
typedef allocator_ref<mock_allocator<int>> test_allocator_ref;
test_allocator_ref ref(&alloc);
// Check if allocator_ref forwards to the underlying allocator.
check_forwarding(alloc, ref);
test_allocator_ref ref2(ref);
check_forwarding(alloc, ref2);
test_allocator_ref ref3;
EXPECT_EQ(nullptr, ref3.get());
ref3 = ref;
check_forwarding(alloc, ref3);
}
typedef allocator_ref<std::allocator<char>> TestAllocator;
static void check_move_buffer(
const char* str, basic_memory_buffer<char, 5, TestAllocator>& buffer) {
std::allocator<char>* alloc = buffer.get_allocator().get();
basic_memory_buffer<char, 5, TestAllocator> buffer2(std::move(buffer));
// Move shouldn't destroy the inline content of the first buffer.
EXPECT_EQ(str, std::string(&buffer[0], buffer.size()));
EXPECT_EQ(str, std::string(&buffer2[0], buffer2.size()));
EXPECT_EQ(5u, buffer2.capacity());
// Move should transfer allocator.
EXPECT_EQ(nullptr, buffer.get_allocator().get());
EXPECT_EQ(alloc, buffer2.get_allocator().get());
}
TEST(MemoryBufferTest, MoveCtorInlineBuffer) {
std::allocator<char> alloc;
basic_memory_buffer<char, 5, TestAllocator> buffer((TestAllocator(&alloc)));
const char test[] = "test";
buffer.append(test, test + 4);
check_move_buffer("test", buffer);
// Adding one more character fills the inline buffer, but doesn't cause
// dynamic allocation.
buffer.push_back('a');
check_move_buffer("testa", buffer);
}
TEST(MemoryBufferTest, MoveCtorDynamicBuffer) {
std::allocator<char> alloc;
basic_memory_buffer<char, 4, TestAllocator> buffer((TestAllocator(&alloc)));
const char test[] = "test";
buffer.append(test, test + 4);
const char* inline_buffer_ptr = &buffer[0];
// Adding one more character causes the content to move from the inline to
// a dynamically allocated buffer.
buffer.push_back('a');
basic_memory_buffer<char, 4, TestAllocator> buffer2(std::move(buffer));
// Move should rip the guts of the first buffer.
EXPECT_EQ(inline_buffer_ptr, &buffer[0]);
EXPECT_EQ("testa", std::string(&buffer2[0], buffer2.size()));
EXPECT_GT(buffer2.capacity(), 4u);
}
static void check_move_assign_buffer(const char* str,
basic_memory_buffer<char, 5>& buffer) {
basic_memory_buffer<char, 5> buffer2;
buffer2 = std::move(buffer);
// Move shouldn't destroy the inline content of the first buffer.
EXPECT_EQ(str, std::string(&buffer[0], buffer.size()));
EXPECT_EQ(str, std::string(&buffer2[0], buffer2.size()));
EXPECT_EQ(5u, buffer2.capacity());
}
TEST(MemoryBufferTest, MoveAssignment) {
basic_memory_buffer<char, 5> buffer;
const char test[] = "test";
buffer.append(test, test + 4);
check_move_assign_buffer("test", buffer);
// Adding one more character fills the inline buffer, but doesn't cause
// dynamic allocation.
buffer.push_back('a');
check_move_assign_buffer("testa", buffer);
const char* inline_buffer_ptr = &buffer[0];
// Adding one more character causes the content to move from the inline to
// a dynamically allocated buffer.
buffer.push_back('b');
basic_memory_buffer<char, 5> buffer2;
buffer2 = std::move(buffer);
// Move should rip the guts of the first buffer.
EXPECT_EQ(inline_buffer_ptr, &buffer[0]);
EXPECT_EQ("testab", std::string(&buffer2[0], buffer2.size()));
EXPECT_GT(buffer2.capacity(), 5u);
}
TEST(MemoryBufferTest, Grow) {
typedef allocator_ref<mock_allocator<int>> Allocator;
typedef basic_memory_buffer<int, 10, Allocator> Base;
mock_allocator<int> alloc;
struct TestMemoryBuffer : Base {
TestMemoryBuffer(Allocator alloc) : Base(alloc) {}
void grow(size_t size) { Base::grow(size); }
} buffer((Allocator(&alloc)));
buffer.resize(7);
using fmt::detail::to_unsigned;
for (int i = 0; i < 7; ++i) buffer[to_unsigned(i)] = i * i;
EXPECT_EQ(10u, buffer.capacity());
int mem[20];
mem[7] = 0xdead;
EXPECT_CALL(alloc, allocate(20)).WillOnce(Return(mem));
buffer.grow(20);
EXPECT_EQ(20u, buffer.capacity());
// Check if size elements have been copied
for (int i = 0; i < 7; ++i) EXPECT_EQ(i * i, buffer[to_unsigned(i)]);
// and no more than that.
EXPECT_EQ(0xdead, buffer[7]);
EXPECT_CALL(alloc, deallocate(mem, 20));
}
TEST(MemoryBufferTest, Allocator) {
typedef allocator_ref<mock_allocator<char>> TestAllocator;
basic_memory_buffer<char, 10, TestAllocator> buffer;
EXPECT_EQ(nullptr, buffer.get_allocator().get());
StrictMock<mock_allocator<char>> alloc;
char mem;
{
basic_memory_buffer<char, 10, TestAllocator> buffer2(
(TestAllocator(&alloc)));
EXPECT_EQ(&alloc, buffer2.get_allocator().get());
size_t size = 2 * fmt::inline_buffer_size;
EXPECT_CALL(alloc, allocate(size)).WillOnce(Return(&mem));
buffer2.reserve(size);
EXPECT_CALL(alloc, deallocate(&mem, size));
}
}
TEST(MemoryBufferTest, ExceptionInDeallocate) {
typedef allocator_ref<mock_allocator<char>> TestAllocator;
StrictMock<mock_allocator<char>> alloc;
basic_memory_buffer<char, 10, TestAllocator> buffer((TestAllocator(&alloc)));
size_t size = 2 * fmt::inline_buffer_size;
std::vector<char> mem(size);
{
EXPECT_CALL(alloc, allocate(size)).WillOnce(Return(&mem[0]));
buffer.resize(size);
std::fill(&buffer[0], &buffer[0] + size, 'x');
}
std::vector<char> mem2(2 * size);
{
EXPECT_CALL(alloc, allocate(2 * size)).WillOnce(Return(&mem2[0]));
std::exception e;
EXPECT_CALL(alloc, deallocate(&mem[0], size)).WillOnce(testing::Throw(e));
EXPECT_THROW(buffer.reserve(2 * size), std::exception);
EXPECT_EQ(&mem2[0], &buffer[0]);
// Check that the data has been copied.
for (size_t i = 0; i < size; ++i) EXPECT_EQ('x', buffer[i]);
}
EXPECT_CALL(alloc, deallocate(&mem2[0], 2 * size));
}
TEST(UtilTest, UTF8ToUTF16) {
fmt::detail::utf8_to_utf16 u("лошадка");
EXPECT_EQ(L"\x043B\x043E\x0448\x0430\x0434\x043A\x0430", u.str());
EXPECT_EQ(7, u.size());
// U+10437 { DESERET SMALL LETTER YEE }
EXPECT_EQ(L"\xD801\xDC37", fmt::detail::utf8_to_utf16("𐐷").str());
EXPECT_THROW_MSG(fmt::detail::utf8_to_utf16("\xc3\x28"), std::runtime_error,
"invalid utf8");
EXPECT_THROW_MSG(fmt::detail::utf8_to_utf16(fmt::string_view("л", 1)),
std::runtime_error, "invalid utf8");
EXPECT_EQ(L"123456", fmt::detail::utf8_to_utf16("123456").str());
}
TEST(UtilTest, UTF8ToUTF16EmptyString) {
std::string s = "";
fmt::detail::utf8_to_utf16 u(s.c_str());
EXPECT_EQ(L"", u.str());
EXPECT_EQ(s.size(), u.size());
}
TEST(UtilTest, FormatSystemError) {
fmt::memory_buffer message;
fmt::format_system_error(message, EDOM, "test");
EXPECT_EQ(fmt::format("test: {}", get_system_error(EDOM)),
to_string(message));
message = fmt::memory_buffer();
// Check if std::allocator throws on allocating max size_t / 2 chars.
size_t max_size = max_value<size_t>() / 2;
bool throws_on_alloc = false;
try {
std::allocator<char> alloc;
alloc.deallocate(alloc.allocate(max_size), max_size);
} catch (const std::bad_alloc&) {
throws_on_alloc = true;
}
if (!throws_on_alloc) {
fmt::print("warning: std::allocator allocates {} chars", max_size);
return;
}
fmt::format_system_error(message, EDOM, fmt::string_view(nullptr, max_size));
EXPECT_EQ(fmt::format("error {}", EDOM), to_string(message));
}
TEST(UtilTest, SystemError) {
fmt::system_error e(EDOM, "test");
EXPECT_EQ(fmt::format("test: {}", get_system_error(EDOM)), e.what());
EXPECT_EQ(EDOM, e.error_code());
fmt::system_error error(0, "");
try {
throw fmt::system_error(EDOM, "test {}", "error");
} catch (const fmt::system_error& e) {
error = e;
}
fmt::memory_buffer message;
fmt::format_system_error(message, EDOM, "test error");
EXPECT_EQ(to_string(message), error.what());
EXPECT_EQ(EDOM, error.error_code());
}
TEST(UtilTest, ReportSystemError) {
fmt::memory_buffer out;
fmt::format_system_error(out, EDOM, "test error");
out.push_back('\n');
EXPECT_WRITE(stderr, fmt::report_system_error(EDOM, "test error"),
to_string(out));
}
TEST(StringViewTest, Ctor) {
EXPECT_STREQ("abc", string_view("abc").data());
EXPECT_EQ(3u, string_view("abc").size());
EXPECT_STREQ("defg", string_view(std::string("defg")).data());
EXPECT_EQ(4u, string_view(std::string("defg")).size());
}
TEST(FormatToTest, FormatWithoutArgs) {
std::string s;
fmt::format_to(std::back_inserter(s), "test");
EXPECT_EQ("test", s);
}
TEST(FormatToTest, Format) {
std::string s;
fmt::format_to(std::back_inserter(s), "part{0}", 1);
EXPECT_EQ("part1", s);
fmt::format_to(std::back_inserter(s), "part{0}", 2);
EXPECT_EQ("part1part2", s);
}
TEST(FormatToTest, WideString) {
std::vector<wchar_t> buf;
fmt::format_to(std::back_inserter(buf), L"{}{}", 42, L'\0');
EXPECT_STREQ(buf.data(), L"42");
}
TEST(FormatToTest, FormatToMemoryBuffer) {
fmt::basic_memory_buffer<char, 100> buffer;
fmt::format_to(buffer, "{}", "foo");
EXPECT_EQ("foo", to_string(buffer));
fmt::wmemory_buffer wbuffer;
fmt::format_to(wbuffer, L"{}", L"foo");
EXPECT_EQ(L"foo", to_string(wbuffer));
}
TEST(FormatterTest, Escape) {
EXPECT_EQ("{", format("{{"));
EXPECT_EQ("before {", format("before {{"));
EXPECT_EQ("{ after", format("{{ after"));
EXPECT_EQ("before { after", format("before {{ after"));
EXPECT_EQ("}", format("}}"));
EXPECT_EQ("before }", format("before }}"));
EXPECT_EQ("} after", format("}} after"));
EXPECT_EQ("before } after", format("before }} after"));
EXPECT_EQ("{}", format("{{}}"));
EXPECT_EQ("{42}", format("{{{0}}}", 42));
}
TEST(FormatterTest, UnmatchedBraces) {
EXPECT_THROW_MSG(format("{"), format_error, "invalid format string");
EXPECT_THROW_MSG(format("}"), format_error, "unmatched '}' in format string");
EXPECT_THROW_MSG(format("{0{}"), format_error, "invalid format string");
}
TEST(FormatterTest, NoArgs) { EXPECT_EQ("test", format("test")); }
TEST(FormatterTest, ArgsInDifferentPositions) {
EXPECT_EQ("42", format("{0}", 42));
EXPECT_EQ("before 42", format("before {0}", 42));
EXPECT_EQ("42 after", format("{0} after", 42));
EXPECT_EQ("before 42 after", format("before {0} after", 42));
EXPECT_EQ("answer = 42", format("{0} = {1}", "answer", 42));
EXPECT_EQ("42 is the answer", format("{1} is the {0}", "answer", 42));
EXPECT_EQ("abracadabra", format("{0}{1}{0}", "abra", "cad"));
}
TEST(FormatterTest, ArgErrors) {
EXPECT_THROW_MSG(format("{"), format_error, "invalid format string");
EXPECT_THROW_MSG(format("{?}"), format_error, "invalid format string");
EXPECT_THROW_MSG(format("{0"), format_error, "invalid format string");
EXPECT_THROW_MSG(format("{0}"), format_error, "argument not found");
EXPECT_THROW_MSG(format("{00}", 42), format_error, "invalid format string");
char format_str[BUFFER_SIZE];
safe_sprintf(format_str, "{%u", INT_MAX);
EXPECT_THROW_MSG(format(format_str), format_error, "invalid format string");
safe_sprintf(format_str, "{%u}", INT_MAX);
EXPECT_THROW_MSG(format(format_str), format_error, "argument not found");
safe_sprintf(format_str, "{%u", INT_MAX + 1u);
EXPECT_THROW_MSG(format(format_str), format_error, "number is too big");
safe_sprintf(format_str, "{%u}", INT_MAX + 1u);
EXPECT_THROW_MSG(format(format_str), format_error, "number is too big");
}
template <int N> struct TestFormat {
template <typename... Args>
static std::string format(fmt::string_view format_str, const Args&... args) {
return TestFormat<N - 1>::format(format_str, N - 1, args...);
}
};
template <> struct TestFormat<0> {
template <typename... Args>
static std::string format(fmt::string_view format_str, const Args&... args) {
return fmt::format(format_str, args...);
}
};
TEST(FormatterTest, ManyArgs) {
EXPECT_EQ("19", TestFormat<20>::format("{19}"));
EXPECT_THROW_MSG(TestFormat<20>::format("{20}"), format_error,
"argument not found");
EXPECT_THROW_MSG(TestFormat<21>::format("{21}"), format_error,
"argument not found");
enum { max_packed_args = fmt::detail::max_packed_args };
std::string format_str = fmt::format("{{{}}}", max_packed_args + 1);
EXPECT_THROW_MSG(TestFormat<max_packed_args>::format(format_str),
format_error, "argument not found");
}
TEST(FormatterTest, NamedArg) {
EXPECT_EQ("1/a/A", format("{_1}/{a_}/{A_}", fmt::arg("a_", 'a'),
fmt::arg("A_", "A"), fmt::arg("_1", 1)));
EXPECT_EQ(" -42", format("{0:{width}}", -42, fmt::arg("width", 4)));
EXPECT_EQ("st", format("{0:.{precision}}", "str", fmt::arg("precision", 2)));
EXPECT_EQ("1 2", format("{} {two}", 1, fmt::arg("two", 2)));
EXPECT_EQ("42", format("{c}", fmt::arg("a", 0), fmt::arg("b", 0),
fmt::arg("c", 42), fmt::arg("d", 0), fmt::arg("e", 0),
fmt::arg("f", 0), fmt::arg("g", 0), fmt::arg("h", 0),
fmt::arg("i", 0), fmt::arg("j", 0), fmt::arg("k", 0),
fmt::arg("l", 0), fmt::arg("m", 0), fmt::arg("n", 0),
fmt::arg("o", 0), fmt::arg("p", 0)));
EXPECT_THROW_MSG(format("{a}"), format_error, "argument not found");
EXPECT_THROW_MSG(format("{a}", 42), format_error, "argument not found");
}
TEST(FormatterTest, AutoArgIndex) {
EXPECT_EQ("abc", format("{}{}{}", 'a', 'b', 'c'));
EXPECT_THROW_MSG(format("{0}{}", 'a', 'b'), format_error,
"cannot switch from manual to automatic argument indexing");
EXPECT_THROW_MSG(format("{}{0}", 'a', 'b'), format_error,
"cannot switch from automatic to manual argument indexing");
EXPECT_EQ("1.2", format("{:.{}}", 1.2345, 2));
EXPECT_THROW_MSG(format("{0}:.{}", 1.2345, 2), format_error,
"cannot switch from manual to automatic argument indexing");
EXPECT_THROW_MSG(format("{:.{0}}", 1.2345, 2), format_error,
"cannot switch from automatic to manual argument indexing");
EXPECT_THROW_MSG(format("{}"), format_error, "argument not found");
}
TEST(FormatterTest, EmptySpecs) { EXPECT_EQ("42", format("{0:}", 42)); }
TEST(FormatterTest, LeftAlign) {
EXPECT_EQ("42 ", format("{0:<4}", 42));
EXPECT_EQ("42 ", format("{0:<4o}", 042));
EXPECT_EQ("42 ", format("{0:<4x}", 0x42));
EXPECT_EQ("-42 ", format("{0:<5}", -42));
EXPECT_EQ("42 ", format("{0:<5}", 42u));
EXPECT_EQ("-42 ", format("{0:<5}", -42l));
EXPECT_EQ("42 ", format("{0:<5}", 42ul));
EXPECT_EQ("-42 ", format("{0:<5}", -42ll));
EXPECT_EQ("42 ", format("{0:<5}", 42ull));
EXPECT_EQ("-42.0 ", format("{0:<7}", -42.0));
EXPECT_EQ("-42.0 ", format("{0:<7}", -42.0l));
EXPECT_EQ("c ", format("{0:<5}", 'c'));
EXPECT_EQ("abc ", format("{0:<5}", "abc"));
EXPECT_EQ("0xface ", format("{0:<8}", reinterpret_cast<void*>(0xface)));
}
TEST(FormatterTest, RightAlign) {
EXPECT_EQ(" 42", format("{0:>4}", 42));
EXPECT_EQ(" 42", format("{0:>4o}", 042));
EXPECT_EQ(" 42", format("{0:>4x}", 0x42));
EXPECT_EQ(" -42", format("{0:>5}", -42));
EXPECT_EQ(" 42", format("{0:>5}", 42u));
EXPECT_EQ(" -42", format("{0:>5}", -42l));
EXPECT_EQ(" 42", format("{0:>5}", 42ul));
EXPECT_EQ(" -42", format("{0:>5}", -42ll));
EXPECT_EQ(" 42", format("{0:>5}", 42ull));
EXPECT_EQ(" -42.0", format("{0:>7}", -42.0));
EXPECT_EQ(" -42.0", format("{0:>7}", -42.0l));
EXPECT_EQ(" c", format("{0:>5}", 'c'));
EXPECT_EQ(" abc", format("{0:>5}", "abc"));
EXPECT_EQ(" 0xface", format("{0:>8}", reinterpret_cast<void*>(0xface)));
}
#if FMT_DEPRECATED_NUMERIC_ALIGN
TEST(FormatterTest, NumericAlign) { EXPECT_EQ("0042", format("{0:=4}", 42)); }
#endif
TEST(FormatterTest, CenterAlign) {
EXPECT_EQ(" 42 ", format("{0:^5}", 42));
EXPECT_EQ(" 42 ", format("{0:^5o}", 042));
EXPECT_EQ(" 42 ", format("{0:^5x}", 0x42));
EXPECT_EQ(" -42 ", format("{0:^5}", -42));
EXPECT_EQ(" 42 ", format("{0:^5}", 42u));
EXPECT_EQ(" -42 ", format("{0:^5}", -42l));
EXPECT_EQ(" 42 ", format("{0:^5}", 42ul));
EXPECT_EQ(" -42 ", format("{0:^5}", -42ll));
EXPECT_EQ(" 42 ", format("{0:^5}", 42ull));
EXPECT_EQ(" -42.0 ", format("{0:^7}", -42.0));
EXPECT_EQ(" -42.0 ", format("{0:^7}", -42.0l));
EXPECT_EQ(" c ", format("{0:^5}", 'c'));
EXPECT_EQ(" abc ", format("{0:^6}", "abc"));
EXPECT_EQ(" 0xface ", format("{0:^8}", reinterpret_cast<void*>(0xface)));
}
TEST(FormatterTest, Fill) {
EXPECT_THROW_MSG(format("{0:{<5}", 'c'), format_error,
"invalid fill character '{'");
EXPECT_THROW_MSG(format("{0:{<5}}", 'c'), format_error,
"invalid fill character '{'");
EXPECT_EQ("**42", format("{0:*>4}", 42));
EXPECT_EQ("**-42", format("{0:*>5}", -42));
EXPECT_EQ("***42", format("{0:*>5}", 42u));
EXPECT_EQ("**-42", format("{0:*>5}", -42l));
EXPECT_EQ("***42", format("{0:*>5}", 42ul));
EXPECT_EQ("**-42", format("{0:*>5}", -42ll));
EXPECT_EQ("***42", format("{0:*>5}", 42ull));
EXPECT_EQ("**-42.0", format("{0:*>7}", -42.0));
EXPECT_EQ("**-42.0", format("{0:*>7}", -42.0l));
EXPECT_EQ("c****", format("{0:*<5}", 'c'));
EXPECT_EQ("abc**", format("{0:*<5}", "abc"));
EXPECT_EQ("**0xface", format("{0:*>8}", reinterpret_cast<void*>(0xface)));
EXPECT_EQ("foo=", format("{:}=", "foo"));
EXPECT_EQ(std::string("\0\0\0*", 4), format(string_view("{:\0>4}", 6), '*'));
EXPECT_EQ("жж42", format("{0:ж>4}", 42));
EXPECT_THROW_MSG(format("{:\x80\x80\x80\x80\x80>}", 0), format_error,
"invalid fill");
}
TEST(FormatterTest, PlusSign) {
EXPECT_EQ("+42", format("{0:+}", 42));
EXPECT_EQ("-42", format("{0:+}", -42));
EXPECT_EQ("+42", format("{0:+}", 42));
EXPECT_THROW_MSG(format("{0:+}", 42u), format_error,
"format specifier requires signed argument");
EXPECT_EQ("+42", format("{0:+}", 42l));
EXPECT_THROW_MSG(format("{0:+}", 42ul), format_error,
"format specifier requires signed argument");
EXPECT_EQ("+42", format("{0:+}", 42ll));
EXPECT_THROW_MSG(format("{0:+}", 42ull), format_error,
"format specifier requires signed argument");
EXPECT_EQ("+42.0", format("{0:+}", 42.0));
EXPECT_EQ("+42.0", format("{0:+}", 42.0l));
EXPECT_THROW_MSG(format("{0:+", 'c'), format_error,
"missing '}' in format string");
EXPECT_THROW_MSG(format("{0:+}", 'c'), format_error,
"invalid format specifier for char");
EXPECT_THROW_MSG(format("{0:+}", "abc"), format_error,
"format specifier requires numeric argument");
EXPECT_THROW_MSG(format("{0:+}", reinterpret_cast<void*>(0x42)), format_error,
"format specifier requires numeric argument");
}
TEST(FormatterTest, MinusSign) {
EXPECT_EQ("42", format("{0:-}", 42));
EXPECT_EQ("-42", format("{0:-}", -42));
EXPECT_EQ("42", format("{0:-}", 42));
EXPECT_THROW_MSG(format("{0:-}", 42u), format_error,
"format specifier requires signed argument");
EXPECT_EQ("42", format("{0:-}", 42l));
EXPECT_THROW_MSG(format("{0:-}", 42ul), format_error,
"format specifier requires signed argument");
EXPECT_EQ("42", format("{0:-}", 42ll));
EXPECT_THROW_MSG(format("{0:-}", 42ull), format_error,
"format specifier requires signed argument");
EXPECT_EQ("42.0", format("{0:-}", 42.0));
EXPECT_EQ("42.0", format("{0:-}", 42.0l));
EXPECT_THROW_MSG(format("{0:-", 'c'), format_error,
"missing '}' in format string");
EXPECT_THROW_MSG(format("{0:-}", 'c'), format_error,
"invalid format specifier for char");
EXPECT_THROW_MSG(format("{0:-}", "abc"), format_error,
"format specifier requires numeric argument");
EXPECT_THROW_MSG(format("{0:-}", reinterpret_cast<void*>(0x42)), format_error,
"format specifier requires numeric argument");
}
TEST(FormatterTest, SpaceSign) {
EXPECT_EQ(" 42", format("{0: }", 42));
EXPECT_EQ("-42", format("{0: }", -42));
EXPECT_EQ(" 42", format("{0: }", 42));
EXPECT_THROW_MSG(format("{0: }", 42u), format_error,
"format specifier requires signed argument");
EXPECT_EQ(" 42", format("{0: }", 42l));
EXPECT_THROW_MSG(format("{0: }", 42ul), format_error,
"format specifier requires signed argument");
EXPECT_EQ(" 42", format("{0: }", 42ll));
EXPECT_THROW_MSG(format("{0: }", 42ull), format_error,
"format specifier requires signed argument");
EXPECT_EQ(" 42.0", format("{0: }", 42.0));
EXPECT_EQ(" 42.0", format("{0: }", 42.0l));
EXPECT_THROW_MSG(format("{0: ", 'c'), format_error,
"missing '}' in format string");
EXPECT_THROW_MSG(format("{0: }", 'c'), format_error,
"invalid format specifier for char");
EXPECT_THROW_MSG(format("{0: }", "abc"), format_error,
"format specifier requires numeric argument");
EXPECT_THROW_MSG(format("{0: }", reinterpret_cast<void*>(0x42)), format_error,
"format specifier requires numeric argument");
}
TEST(FormatterTest, HashFlag) {
EXPECT_EQ("42", format("{0:#}", 42));
EXPECT_EQ("-42", format("{0:#}", -42));
EXPECT_EQ("0b101010", format("{0:#b}", 42));
EXPECT_EQ("0B101010", format("{0:#B}", 42));
EXPECT_EQ("-0b101010", format("{0:#b}", -42));
EXPECT_EQ("0x42", format("{0:#x}", 0x42));
EXPECT_EQ("0X42", format("{0:#X}", 0x42));
EXPECT_EQ("-0x42", format("{0:#x}", -0x42));
EXPECT_EQ("0", format("{0:#o}", 0));
EXPECT_EQ("042", format("{0:#o}", 042));
EXPECT_EQ("-042", format("{0:#o}", -042));
EXPECT_EQ("42", format("{0:#}", 42u));
EXPECT_EQ("0x42", format("{0:#x}", 0x42u));
EXPECT_EQ("042", format("{0:#o}", 042u));
EXPECT_EQ("-42", format("{0:#}", -42l));
EXPECT_EQ("0x42", format("{0:#x}", 0x42l));
EXPECT_EQ("-0x42", format("{0:#x}", -0x42l));
EXPECT_EQ("042", format("{0:#o}", 042l));
EXPECT_EQ("-042", format("{0:#o}", -042l));
EXPECT_EQ("42", format("{0:#}", 42ul));
EXPECT_EQ("0x42", format("{0:#x}", 0x42ul));
EXPECT_EQ("042", format("{0:#o}", 042ul));
EXPECT_EQ("-42", format("{0:#}", -42ll));
EXPECT_EQ("0x42", format("{0:#x}", 0x42ll));
EXPECT_EQ("-0x42", format("{0:#x}", -0x42ll));
EXPECT_EQ("042", format("{0:#o}", 042ll));
EXPECT_EQ("-042", format("{0:#o}", -042ll));
EXPECT_EQ("42", format("{0:#}", 42ull));
EXPECT_EQ("0x42", format("{0:#x}", 0x42ull));
EXPECT_EQ("042", format("{0:#o}", 042ull));
EXPECT_EQ("-42.0", format("{0:#}", -42.0));
EXPECT_EQ("-42.0", format("{0:#}", -42.0l));
EXPECT_EQ("4.e+01", format("{:#.0e}", 42.0));
EXPECT_EQ("0.", format("{:#.0f}", 0.01));
auto s = format("{:#.0f}", 0.5); // MSVC's printf uses wrong rounding mode.
EXPECT_TRUE(s == "0." || s == "1.");
EXPECT_THROW_MSG(format("{0:#", 'c'), format_error,
"missing '}' in format string");
EXPECT_THROW_MSG(format("{0:#}", 'c'), format_error,
"invalid format specifier for char");
EXPECT_THROW_MSG(format("{0:#}", "abc"), format_error,
"format specifier requires numeric argument");
EXPECT_THROW_MSG(format("{0:#}", reinterpret_cast<void*>(0x42)), format_error,
"format specifier requires numeric argument");
}
TEST(FormatterTest, ZeroFlag) {
EXPECT_EQ("42", format("{0:0}", 42));
EXPECT_EQ("-0042", format("{0:05}", -42));
EXPECT_EQ("00042", format("{0:05}", 42u));
EXPECT_EQ("-0042", format("{0:05}", -42l));
EXPECT_EQ("00042", format("{0:05}", 42ul));
EXPECT_EQ("-0042", format("{0:05}", -42ll));
EXPECT_EQ("00042", format("{0:05}", 42ull));
EXPECT_EQ("-0042.0", format("{0:07}", -42.0));
EXPECT_EQ("-0042.0", format("{0:07}", -42.0l));
EXPECT_THROW_MSG(format("{0:0", 'c'), format_error,
"missing '}' in format string");
EXPECT_THROW_MSG(format("{0:05}", 'c'), format_error,
"invalid format specifier for char");
EXPECT_THROW_MSG(format("{0:05}", "abc"), format_error,
"format specifier requires numeric argument");
EXPECT_THROW_MSG(format("{0:05}", reinterpret_cast<void*>(0x42)),
format_error, "format specifier requires numeric argument");
}
TEST(FormatterTest, Width) {
char format_str[BUFFER_SIZE];
safe_sprintf(format_str, "{0:%u", UINT_MAX);
increment(format_str + 3);
EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big");
size_t size = std::strlen(format_str);
format_str[size] = '}';
format_str[size + 1] = 0;
EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big");
safe_sprintf(format_str, "{0:%u", INT_MAX + 1u);
EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big");
safe_sprintf(format_str, "{0:%u}", INT_MAX + 1u);
EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big");
EXPECT_EQ(" -42", format("{0:4}", -42));
EXPECT_EQ(" 42", format("{0:5}", 42u));
EXPECT_EQ(" -42", format("{0:6}", -42l));
EXPECT_EQ(" 42", format("{0:7}", 42ul));
EXPECT_EQ(" -42", format("{0:6}", -42ll));
EXPECT_EQ(" 42", format("{0:7}", 42ull));
EXPECT_EQ(" -1.23", format("{0:8}", -1.23));
EXPECT_EQ(" -1.23", format("{0:9}", -1.23l));
EXPECT_EQ(" 0xcafe", format("{0:10}", reinterpret_cast<void*>(0xcafe)));
EXPECT_EQ("x ", format("{0:11}", 'x'));
EXPECT_EQ("str ", format("{0:12}", "str"));
EXPECT_EQ(fmt::format("{:*^5}", "🤡"), "**🤡**");
}
template <typename T> inline T const_check(T value) { return value; }
TEST(FormatterTest, RuntimeWidth) {
char format_str[BUFFER_SIZE];
safe_sprintf(format_str, "{0:{%u", UINT_MAX);
increment(format_str + 4);
EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big");
size_t size = std::strlen(format_str);
format_str[size] = '}';
format_str[size + 1] = 0;
EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big");
format_str[size + 1] = '}';
format_str[size + 2] = 0;
EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big");
EXPECT_THROW_MSG(format("{0:{", 0), format_error, "invalid format string");
EXPECT_THROW_MSG(format("{0:{}", 0), format_error,
"cannot switch from manual to automatic argument indexing");
EXPECT_THROW_MSG(format("{0:{?}}", 0), format_error, "invalid format string");
EXPECT_THROW_MSG(format("{0:{1}}", 0), format_error, "argument not found");
EXPECT_THROW_MSG(format("{0:{0:}}", 0), format_error,
"invalid format string");
EXPECT_THROW_MSG(format("{0:{1}}", 0, -1), format_error, "negative width");
EXPECT_THROW_MSG(format("{0:{1}}", 0, (INT_MAX + 1u)), format_error,
"number is too big");
EXPECT_THROW_MSG(format("{0:{1}}", 0, -1l), format_error, "negative width");
if (const_check(sizeof(long) > sizeof(int))) {
long value = INT_MAX;
EXPECT_THROW_MSG(format("{0:{1}}", 0, (value + 1)), format_error,
"number is too big");
}
EXPECT_THROW_MSG(format("{0:{1}}", 0, (INT_MAX + 1ul)), format_error,
"number is too big");
EXPECT_THROW_MSG(format("{0:{1}}", 0, '0'), format_error,
"width is not integer");
EXPECT_THROW_MSG(format("{0:{1}}", 0, 0.0), format_error,
"width is not integer");
EXPECT_EQ(" -42", format("{0:{1}}", -42, 4));
EXPECT_EQ(" 42", format("{0:{1}}", 42u, 5));
EXPECT_EQ(" -42", format("{0:{1}}", -42l, 6));
EXPECT_EQ(" 42", format("{0:{1}}", 42ul, 7));
EXPECT_EQ(" -42", format("{0:{1}}", -42ll, 6));
EXPECT_EQ(" 42", format("{0:{1}}", 42ull, 7));
EXPECT_EQ(" -1.23", format("{0:{1}}", -1.23, 8));
EXPECT_EQ(" -1.23", format("{0:{1}}", -1.23l, 9));
EXPECT_EQ(" 0xcafe",
format("{0:{1}}", reinterpret_cast<void*>(0xcafe), 10));
EXPECT_EQ("x ", format("{0:{1}}", 'x', 11));
EXPECT_EQ("str ", format("{0:{1}}", "str", 12));
}
TEST(FormatterTest, Precision) {
char format_str[BUFFER_SIZE];
safe_sprintf(format_str, "{0:.%u", UINT_MAX);
increment(format_str + 4);
EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big");
size_t size = std::strlen(format_str);
format_str[size] = '}';
format_str[size + 1] = 0;
EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big");
safe_sprintf(format_str, "{0:.%u", INT_MAX + 1u);
EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big");
safe_sprintf(format_str, "{0:.%u}", INT_MAX + 1u);
EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big");
EXPECT_THROW_MSG(format("{0:.", 0), format_error,
"missing precision specifier");
EXPECT_THROW_MSG(format("{0:.}", 0), format_error,
"missing precision specifier");
EXPECT_THROW_MSG(format("{0:.2", 0), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.2}", 42), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.2f}", 42), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.2}", 42u), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.2f}", 42u), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.2}", 42l), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.2f}", 42l), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.2}", 42ul), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.2f}", 42ul), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.2}", 42ll), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.2f}", 42ll), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.2}", 42ull), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.2f}", 42ull), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:3.0}", 'x'), format_error,
"precision not allowed for this argument type");
EXPECT_EQ("1.2", format("{0:.2}", 1.2345));
EXPECT_EQ("1.2", format("{0:.2}", 1.2345l));
EXPECT_EQ("1.2e+56", format("{:.2}", 1.234e56));
EXPECT_EQ("1e+00", format("{:.0e}", 1.0L));
EXPECT_EQ(" 0.0e+00", format("{:9.1e}", 0.0));
EXPECT_EQ(
"4.9406564584124654417656879286822137236505980261432476442558568250067550"
"727020875186529983636163599237979656469544571773092665671035593979639877"
"479601078187812630071319031140452784581716784898210368871863605699873072"
"305000638740915356498438731247339727316961514003171538539807412623856559"
"117102665855668676818703956031062493194527159149245532930545654440112748"
"012970999954193198940908041656332452475714786901472678015935523861155013"
"480352649347201937902681071074917033322268447533357208324319361e-324",
format("{:.494}", 4.9406564584124654E-324));
EXPECT_EQ(
"-0X1.41FE3FFE71C9E000000000000000000000000000000000000000000000000000000"
"000000000000000000000000000000000000000000000000000000000000000000000000"
"000000000000000000000000000000000000000000000000000000000000000000000000"
"000000000000000000000000000000000000000000000000000000000000000000000000"
"000000000000000000000000000000000000000000000000000000000000000000000000"
"000000000000000000000000000000000000000000000000000000000000000000000000"
"000000000000000000000000000000000000000000000000000000000000000000000000"
"000000000000000000000000000000000000000000000000000000000000000000000000"
"000000000000000000000000000000000000000000000000000000000000000000000000"
"000000000000000000000000000000000000000000000000000000000000000000000000"
"000000000000000000000000000000000000000000000000000000000000000000000000"
"000000000000000000000000000000000000000000000000000P+127",
format("{:.838A}", -2.14001164E+38));
EXPECT_EQ("123.", format("{:#.0f}", 123.0));
EXPECT_EQ("1.23", format("{:.02f}", 1.234));
EXPECT_EQ("0.001", format("{:.1g}", 0.001));
EXPECT_THROW_MSG(format("{0:.2}", reinterpret_cast<void*>(0xcafe)),
format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.2f}", reinterpret_cast<void*>(0xcafe)),
format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{:.{}e}", 42.0, fmt::detail::max_value<int>()),
format_error, "number is too big");
EXPECT_EQ("st", format("{0:.2}", "str"));
}
TEST(FormatterTest, RuntimePrecision) {
char format_str[BUFFER_SIZE];
safe_sprintf(format_str, "{0:.{%u", UINT_MAX);
increment(format_str + 5);
EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big");
size_t size = std::strlen(format_str);
format_str[size] = '}';
format_str[size + 1] = 0;
EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big");
format_str[size + 1] = '}';
format_str[size + 2] = 0;
EXPECT_THROW_MSG(format(format_str, 0), format_error, "number is too big");
EXPECT_THROW_MSG(format("{0:.{", 0), format_error, "invalid format string");
EXPECT_THROW_MSG(format("{0:.{}", 0), format_error,
"cannot switch from manual to automatic argument indexing");
EXPECT_THROW_MSG(format("{0:.{?}}", 0), format_error,
"invalid format string");
EXPECT_THROW_MSG(format("{0:.{1}", 0, 0), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.{1}}", 0), format_error, "argument not found");
EXPECT_THROW_MSG(format("{0:.{0:}}", 0), format_error,
"invalid format string");
EXPECT_THROW_MSG(format("{0:.{1}}", 0, -1), format_error,
"negative precision");
EXPECT_THROW_MSG(format("{0:.{1}}", 0, (INT_MAX + 1u)), format_error,
"number is too big");
EXPECT_THROW_MSG(format("{0:.{1}}", 0, -1l), format_error,
"negative precision");
if (const_check(sizeof(long) > sizeof(int))) {
long value = INT_MAX;
EXPECT_THROW_MSG(format("{0:.{1}}", 0, (value + 1)), format_error,
"number is too big");
}
EXPECT_THROW_MSG(format("{0:.{1}}", 0, (INT_MAX + 1ul)), format_error,
"number is too big");
EXPECT_THROW_MSG(format("{0:.{1}}", 0, '0'), format_error,
"precision is not integer");
EXPECT_THROW_MSG(format("{0:.{1}}", 0, 0.0), format_error,
"precision is not integer");
EXPECT_THROW_MSG(format("{0:.{1}}", 42, 2), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.{1}f}", 42, 2), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.{1}}", 42u, 2), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.{1}f}", 42u, 2), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.{1}}", 42l, 2), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.{1}f}", 42l, 2), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.{1}}", 42ul, 2), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.{1}f}", 42ul, 2), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.{1}}", 42ll, 2), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.{1}f}", 42ll, 2), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.{1}}", 42ull, 2), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.{1}f}", 42ull, 2), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:3.{1}}", 'x', 0), format_error,
"precision not allowed for this argument type");
EXPECT_EQ("1.2", format("{0:.{1}}", 1.2345, 2));
EXPECT_EQ("1.2", format("{1:.{0}}", 2, 1.2345l));
EXPECT_THROW_MSG(format("{0:.{1}}", reinterpret_cast<void*>(0xcafe), 2),
format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.{1}f}", reinterpret_cast<void*>(0xcafe), 2),
format_error,
"precision not allowed for this argument type");
EXPECT_EQ("st", format("{0:.{1}}", "str", 2));
}
template <typename T>
void check_unknown_types(const T& value, const char* types, const char*) {
char format_str[BUFFER_SIZE];
const char* special = ".0123456789}";
for (int i = CHAR_MIN; i <= CHAR_MAX; ++i) {
char c = static_cast<char>(i);
if (std::strchr(types, c) || std::strchr(special, c) || !c) continue;
safe_sprintf(format_str, "{0:10%c}", c);
const char* message = "invalid type specifier";
EXPECT_THROW_MSG(format(format_str, value), format_error, message)
<< format_str << " " << message;
}
}
TEST(BoolTest, FormatBool) {
EXPECT_EQ("true", format("{}", true));
EXPECT_EQ("false", format("{}", false));
EXPECT_EQ("1", format("{:d}", true));
EXPECT_EQ("true ", format("{:5}", true));
EXPECT_EQ(L"true", format(L"{}", true));
}
TEST(FormatterTest, FormatShort) {
short s = 42;
EXPECT_EQ("42", format("{0:d}", s));
unsigned short us = 42;
EXPECT_EQ("42", format("{0:d}", us));
}
TEST(FormatterTest, FormatInt) {
EXPECT_THROW_MSG(format("{0:v", 42), format_error,
"missing '}' in format string");
check_unknown_types(42, "bBdoxXnLc", "integer");
EXPECT_EQ("x", format("{:c}", static_cast<int>('x')));
}
TEST(FormatterTest, FormatBin) {
EXPECT_EQ("0", format("{0:b}", 0));
EXPECT_EQ("101010", format("{0:b}", 42));
EXPECT_EQ("101010", format("{0:b}", 42u));
EXPECT_EQ("-101010", format("{0:b}", -42));
EXPECT_EQ("11000000111001", format("{0:b}", 12345));
EXPECT_EQ("10010001101000101011001111000", format("{0:b}", 0x12345678));
EXPECT_EQ("10010000101010111100110111101111", format("{0:b}", 0x90ABCDEF));
EXPECT_EQ("11111111111111111111111111111111",
format("{0:b}", max_value<uint32_t>()));
}
#if FMT_USE_INT128
constexpr auto int128_max = static_cast<__int128_t>(
(static_cast<__uint128_t>(1) << ((__SIZEOF_INT128__ * CHAR_BIT) - 1)) - 1);
constexpr auto int128_min = -int128_max - 1;
constexpr auto uint128_max = ~static_cast<__uint128_t>(0);
#endif
TEST(FormatterTest, FormatDec) {
EXPECT_EQ("0", format("{0}", 0));
EXPECT_EQ("42", format("{0}", 42));
EXPECT_EQ("42", format("{0:d}", 42));
EXPECT_EQ("42", format("{0}", 42u));
EXPECT_EQ("-42", format("{0}", -42));
EXPECT_EQ("12345", format("{0}", 12345));
EXPECT_EQ("67890", format("{0}", 67890));
#if FMT_USE_INT128
EXPECT_EQ("0", format("{0}", static_cast<__int128_t>(0)));
EXPECT_EQ("0", format("{0}", static_cast<__uint128_t>(0)));
EXPECT_EQ("9223372036854775808",
format("{0}", static_cast<__int128_t>(INT64_MAX) + 1));
EXPECT_EQ("-9223372036854775809",
format("{0}", static_cast<__int128_t>(INT64_MIN) - 1));
EXPECT_EQ("18446744073709551616",
format("{0}", static_cast<__int128_t>(UINT64_MAX) + 1));
EXPECT_EQ("170141183460469231731687303715884105727",
format("{0}", int128_max));
EXPECT_EQ("-170141183460469231731687303715884105728",
format("{0}", int128_min));
EXPECT_EQ("340282366920938463463374607431768211455",
format("{0}", uint128_max));
#endif
char buffer[BUFFER_SIZE];
safe_sprintf(buffer, "%d", INT_MIN);
EXPECT_EQ(buffer, format("{0}", INT_MIN));
safe_sprintf(buffer, "%d", INT_MAX);
EXPECT_EQ(buffer, format("{0}", INT_MAX));
safe_sprintf(buffer, "%u", UINT_MAX);
EXPECT_EQ(buffer, format("{0}", UINT_MAX));
safe_sprintf(buffer, "%ld", 0 - static_cast<unsigned long>(LONG_MIN));
EXPECT_EQ(buffer, format("{0}", LONG_MIN));
safe_sprintf(buffer, "%ld", LONG_MAX);
EXPECT_EQ(buffer, format("{0}", LONG_MAX));
safe_sprintf(buffer, "%lu", ULONG_MAX);
EXPECT_EQ(buffer, format("{0}", ULONG_MAX));
}
TEST(FormatterTest, FormatHex) {
EXPECT_EQ("0", format("{0:x}", 0));
EXPECT_EQ("42", format("{0:x}", 0x42));
EXPECT_EQ("42", format("{0:x}", 0x42u));
EXPECT_EQ("-42", format("{0:x}", -0x42));
EXPECT_EQ("12345678", format("{0:x}", 0x12345678));
EXPECT_EQ("90abcdef", format("{0:x}", 0x90abcdef));
EXPECT_EQ("12345678", format("{0:X}", 0x12345678));
EXPECT_EQ("90ABCDEF", format("{0:X}", 0x90ABCDEF));
#if FMT_USE_INT128
EXPECT_EQ("0", format("{0:x}", static_cast<__int128_t>(0)));
EXPECT_EQ("0", format("{0:x}", static_cast<__uint128_t>(0)));
EXPECT_EQ("8000000000000000",
format("{0:x}", static_cast<__int128_t>(INT64_MAX) + 1));
EXPECT_EQ("-8000000000000001",
format("{0:x}", static_cast<__int128_t>(INT64_MIN) - 1));
EXPECT_EQ("10000000000000000",
format("{0:x}", static_cast<__int128_t>(UINT64_MAX) + 1));
EXPECT_EQ("7fffffffffffffffffffffffffffffff", format("{0:x}", int128_max));
EXPECT_EQ("-80000000000000000000000000000000", format("{0:x}", int128_min));
EXPECT_EQ("ffffffffffffffffffffffffffffffff", format("{0:x}", uint128_max));
#endif
char buffer[BUFFER_SIZE];
safe_sprintf(buffer, "-%x", 0 - static_cast<unsigned>(INT_MIN));
EXPECT_EQ(buffer, format("{0:x}", INT_MIN));
safe_sprintf(buffer, "%x", INT_MAX);
EXPECT_EQ(buffer, format("{0:x}", INT_MAX));
safe_sprintf(buffer, "%x", UINT_MAX);
EXPECT_EQ(buffer, format("{0:x}", UINT_MAX));
safe_sprintf(buffer, "-%lx", 0 - static_cast<unsigned long>(LONG_MIN));
EXPECT_EQ(buffer, format("{0:x}", LONG_MIN));
safe_sprintf(buffer, "%lx", LONG_MAX);
EXPECT_EQ(buffer, format("{0:x}", LONG_MAX));
safe_sprintf(buffer, "%lx", ULONG_MAX);
EXPECT_EQ(buffer, format("{0:x}", ULONG_MAX));
}
TEST(FormatterTest, FormatOct) {
EXPECT_EQ("0", format("{0:o}", 0));
EXPECT_EQ("42", format("{0:o}", 042));
EXPECT_EQ("42", format("{0:o}", 042u));
EXPECT_EQ("-42", format("{0:o}", -042));
EXPECT_EQ("12345670", format("{0:o}", 012345670));
#if FMT_USE_INT128
EXPECT_EQ("0", format("{0:o}", static_cast<__int128_t>(0)));
EXPECT_EQ("0", format("{0:o}", static_cast<__uint128_t>(0)));
EXPECT_EQ("1000000000000000000000",
format("{0:o}", static_cast<__int128_t>(INT64_MAX) + 1));
EXPECT_EQ("-1000000000000000000001",
format("{0:o}", static_cast<__int128_t>(INT64_MIN) - 1));
EXPECT_EQ("2000000000000000000000",
format("{0:o}", static_cast<__int128_t>(UINT64_MAX) + 1));
EXPECT_EQ("1777777777777777777777777777777777777777777",
format("{0:o}", int128_max));
EXPECT_EQ("-2000000000000000000000000000000000000000000",
format("{0:o}", int128_min));
EXPECT_EQ("3777777777777777777777777777777777777777777",
format("{0:o}", uint128_max));
#endif
char buffer[BUFFER_SIZE];
safe_sprintf(buffer, "-%o", 0 - static_cast<unsigned>(INT_MIN));
EXPECT_EQ(buffer, format("{0:o}", INT_MIN));
safe_sprintf(buffer, "%o", INT_MAX);
EXPECT_EQ(buffer, format("{0:o}", INT_MAX));
safe_sprintf(buffer, "%o", UINT_MAX);
EXPECT_EQ(buffer, format("{0:o}", UINT_MAX));
safe_sprintf(buffer, "-%lo", 0 - static_cast<unsigned long>(LONG_MIN));
EXPECT_EQ(buffer, format("{0:o}", LONG_MIN));
safe_sprintf(buffer, "%lo", LONG_MAX);
EXPECT_EQ(buffer, format("{0:o}", LONG_MAX));
safe_sprintf(buffer, "%lo", ULONG_MAX);
EXPECT_EQ(buffer, format("{0:o}", ULONG_MAX));
}
TEST(FormatterTest, FormatIntLocale) {
EXPECT_EQ("1234", format("{:L}", 1234));
}
struct ConvertibleToLongLong {
operator long long() const { return 1LL << 32; }
};
TEST(FormatterTest, FormatConvertibleToLongLong) {
EXPECT_EQ("100000000", format("{:x}", ConvertibleToLongLong()));
}
TEST(FormatterTest, FormatFloat) {
EXPECT_EQ("392.500000", format("{0:f}", 392.5f));
}
TEST(FormatterTest, FormatDouble) {
check_unknown_types(1.2, "eEfFgGaAnL%", "double");
EXPECT_EQ("0.0", format("{:}", 0.0));
EXPECT_EQ("0.000000", format("{:f}", 0.0));
EXPECT_EQ("0", format("{:g}", 0.0));
EXPECT_EQ("392.65", format("{:}", 392.65));
EXPECT_EQ("392.65", format("{:g}", 392.65));
EXPECT_EQ("392.65", format("{:G}", 392.65));
EXPECT_EQ("392.650000", format("{:f}", 392.65));
EXPECT_EQ("392.650000", format("{:F}", 392.65));
EXPECT_EQ("42", format("{:L}", 42.0));
char buffer[BUFFER_SIZE];
safe_sprintf(buffer, "%e", 392.65);
EXPECT_EQ(buffer, format("{0:e}", 392.65));
safe_sprintf(buffer, "%E", 392.65);
EXPECT_EQ(buffer, format("{0:E}", 392.65));
EXPECT_EQ("+0000392.6", format("{0:+010.4g}", 392.65));
safe_sprintf(buffer, "%a", -42.0);
EXPECT_EQ(buffer, format("{:a}", -42.0));
safe_sprintf(buffer, "%A", -42.0);
EXPECT_EQ(buffer, format("{:A}", -42.0));
}
TEST(FormatterTest, PrecisionRounding) {
EXPECT_EQ("0", format("{:.0f}", 0.0));
EXPECT_EQ("0", format("{:.0f}", 0.01));
EXPECT_EQ("0", format("{:.0f}", 0.1));
EXPECT_EQ("0.000", format("{:.3f}", 0.00049));
EXPECT_EQ("0.001", format("{:.3f}", 0.0005));
EXPECT_EQ("0.001", format("{:.3f}", 0.00149));
EXPECT_EQ("0.002", format("{:.3f}", 0.0015));
EXPECT_EQ("1.000", format("{:.3f}", 0.9999));
EXPECT_EQ("0.00123", format("{:.3}", 0.00123));
EXPECT_EQ("0.1", format("{:.16g}", 0.1));
// Trigger rounding error in Grisu by a carefully chosen number.
auto n = 3788512123356.985352;
char buffer[64];
safe_sprintf(buffer, "%f", n);
EXPECT_EQ(buffer, format("{:f}", n));
}
TEST(FormatterTest, FormatNaN) {
double nan = std::numeric_limits<double>::quiet_NaN();
EXPECT_EQ("nan", format("{}", nan));
EXPECT_EQ("+nan", format("{:+}", nan));
EXPECT_EQ(" nan", format("{: }", nan));
EXPECT_EQ("NAN", format("{:F}", nan));
EXPECT_EQ("nan ", format("{:<7}", nan));
EXPECT_EQ(" nan ", format("{:^7}", nan));
EXPECT_EQ(" nan", format("{:>7}", nan));
}
TEST(FormatterTest, FormatInfinity) {
double inf = std::numeric_limits<double>::infinity();
EXPECT_EQ("inf", format("{}", inf));
EXPECT_EQ("+inf", format("{:+}", inf));
EXPECT_EQ("-inf", format("{}", -inf));
EXPECT_EQ(" inf", format("{: }", inf));
EXPECT_EQ("INF", format("{:F}", inf));
EXPECT_EQ("inf ", format("{:<7}", inf));
EXPECT_EQ(" inf ", format("{:^7}", inf));
EXPECT_EQ(" inf", format("{:>7}", inf));
}
TEST(FormatterTest, FormatLongDouble) {
EXPECT_EQ("0.0", format("{0:}", 0.0l));
EXPECT_EQ("0.000000", format("{0:f}", 0.0l));
EXPECT_EQ("392.65", format("{0:}", 392.65l));
EXPECT_EQ("392.65", format("{0:g}", 392.65l));
EXPECT_EQ("392.65", format("{0:G}", 392.65l));
EXPECT_EQ("392.650000", format("{0:f}", 392.65l));
EXPECT_EQ("392.650000", format("{0:F}", 392.65l));
char buffer[BUFFER_SIZE];
safe_sprintf(buffer, "%Le", 392.65l);
EXPECT_EQ(buffer, format("{0:e}", 392.65l));
EXPECT_EQ("+0000392.6", format("{0:+010.4g}", 392.64l));
safe_sprintf(buffer, "%La", 3.31l);
EXPECT_EQ(buffer, format("{:a}", 3.31l));
}
TEST(FormatterTest, FormatChar) {
const char types[] = "cbBdoxXL";
check_unknown_types('a', types, "char");
EXPECT_EQ("a", format("{0}", 'a'));
EXPECT_EQ("z", format("{0:c}", 'z'));
EXPECT_EQ(L"a", format(L"{0}", 'a'));
int n = 'x';
for (const char* type = types + 1; *type; ++type) {
std::string format_str = fmt::format("{{:{}}}", *type);
EXPECT_EQ(fmt::format(format_str, n), fmt::format(format_str, 'x'));
}
EXPECT_EQ(fmt::format("{:02X}", n), fmt::format("{:02X}", 'x'));
}
TEST(FormatterTest, FormatVolatileChar) {
volatile char c = 'x';
EXPECT_EQ("x", format("{}", c));
}
TEST(FormatterTest, FormatUnsignedChar) {
EXPECT_EQ("42", format("{}", static_cast<unsigned char>(42)));
EXPECT_EQ("42", format("{}", static_cast<uint8_t>(42)));
}
TEST(FormatterTest, FormatWChar) {
EXPECT_EQ(L"a", format(L"{0}", L'a'));
// This shouldn't compile:
// format("{}", L'a');
}
TEST(FormatterTest, FormatCString) {
check_unknown_types("test", "sp", "string");
EXPECT_EQ("test", format("{0}", "test"));
EXPECT_EQ("test", format("{0:s}", "test"));
char nonconst[] = "nonconst";
EXPECT_EQ("nonconst", format("{0}", nonconst));
EXPECT_THROW_MSG(format("{0}", static_cast<const char*>(nullptr)),
format_error, "string pointer is null");
}
TEST(FormatterTest, FormatSCharString) {
signed char str[] = "test";
EXPECT_EQ("test", format("{0:s}", str));
const signed char* const_str = str;
EXPECT_EQ("test", format("{0:s}", const_str));
}
TEST(FormatterTest, FormatUCharString) {
unsigned char str[] = "test";
EXPECT_EQ("test", format("{0:s}", str));
const unsigned char* const_str = str;
EXPECT_EQ("test", format("{0:s}", const_str));
unsigned char* ptr = str;
EXPECT_EQ("test", format("{0:s}", ptr));
}
TEST(FormatterTest, FormatPointer) {
check_unknown_types(reinterpret_cast<void*>(0x1234), "p", "pointer");
EXPECT_EQ("0x0", format("{0}", static_cast<void*>(nullptr)));
EXPECT_EQ("0x1234", format("{0}", reinterpret_cast<void*>(0x1234)));
EXPECT_EQ("0x1234", format("{0:p}", reinterpret_cast<void*>(0x1234)));
EXPECT_EQ("0x" + std::string(sizeof(void*) * CHAR_BIT / 4, 'f'),
format("{0}", reinterpret_cast<void*>(~uintptr_t())));
EXPECT_EQ("0x1234", format("{}", fmt::ptr(reinterpret_cast<int*>(0x1234))));
std::unique_ptr<int> up(new int(1));
EXPECT_EQ(format("{}", fmt::ptr(up.get())), format("{}", fmt::ptr(up)));
std::shared_ptr<int> sp(new int(1));
EXPECT_EQ(format("{}", fmt::ptr(sp.get())), format("{}", fmt::ptr(sp)));
EXPECT_EQ("0x0", format("{}", nullptr));
}
TEST(FormatterTest, FormatString) {
EXPECT_EQ("test", format("{0}", std::string("test")));
}
TEST(FormatterTest, FormatStringView) {
EXPECT_EQ("test", format("{}", string_view("test")));
EXPECT_EQ("", format("{}", string_view()));
}
#ifdef FMT_USE_STRING_VIEW
struct string_viewable {};
FMT_BEGIN_NAMESPACE
template <> struct formatter<string_viewable> : formatter<std::string_view> {
auto format(string_viewable, format_context& ctx) -> decltype(ctx.out()) {
return formatter<std::string_view>::format("foo", ctx);
}
};
FMT_END_NAMESPACE
TEST(FormatterTest, FormatStdStringView) {
EXPECT_EQ("test", format("{}", std::string_view("test")));
EXPECT_EQ("foo", format("{}", string_viewable()));
}
struct explicitly_convertible_to_std_string_view {
explicit operator std::string_view() const { return "foo"; }
};
namespace fmt {
template <>
struct formatter<explicitly_convertible_to_std_string_view>
: formatter<std::string_view> {
auto format(const explicitly_convertible_to_std_string_view& v,
format_context& ctx) -> decltype(ctx.out()) {
return format_to(ctx.out(), "'{}'", std::string_view(v));
}
};
} // namespace fmt
TEST(FormatterTest, FormatExplicitlyConvertibleToStdStringView) {
EXPECT_EQ("'foo'",
fmt::format("{}", explicitly_convertible_to_std_string_view()));
}
#endif
// std::is_constructible is broken in MSVC until version 2015.
#if !FMT_MSC_VER || FMT_MSC_VER >= 1900
struct explicitly_convertible_to_wstring_view {
explicit operator fmt::wstring_view() const { return L"foo"; }
};
TEST(FormatTest, FormatExplicitlyConvertibleToWStringView) {
EXPECT_EQ(L"foo",
fmt::format(L"{}", explicitly_convertible_to_wstring_view()));
}
#endif
namespace fake_qt {
class QString {
public:
QString(const wchar_t* s) : s_(std::make_shared<std::wstring>(s)) {}
const wchar_t* utf16() const FMT_NOEXCEPT { return s_->data(); }
int size() const FMT_NOEXCEPT { return static_cast<int>(s_->size()); }
private:
std::shared_ptr<std::wstring> s_;
};
fmt::basic_string_view<wchar_t> to_string_view(const QString& s) FMT_NOEXCEPT {
return {s.utf16(), static_cast<size_t>(s.size())};
}
} // namespace fake_qt
TEST(FormatTest, FormatForeignStrings) {
using fake_qt::QString;
EXPECT_EQ(fmt::format(QString(L"{}"), 42), L"42");
EXPECT_EQ(fmt::format(QString(L"{}"), QString(L"42")), L"42");
}
FMT_BEGIN_NAMESPACE
template <> struct formatter<Date> {
template <typename ParseContext>
FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
auto it = ctx.begin();
if (it != ctx.end() && *it == 'd') ++it;
return it;
}
auto format(const Date& d, format_context& ctx) -> decltype(ctx.out()) {
format_to(ctx.out(), "{}-{}-{}", d.year(), d.month(), d.day());
return ctx.out();
}
};
FMT_END_NAMESPACE
TEST(FormatterTest, FormatCustom) {
Date date(2012, 12, 9);
EXPECT_THROW_MSG(fmt::format("{:s}", date), format_error,
"unknown format specifier");
}
class Answer {};
FMT_BEGIN_NAMESPACE
template <> struct formatter<Answer> : formatter<int> {
template <typename FormatContext>
auto format(Answer, FormatContext& ctx) -> decltype(ctx.out()) {
return formatter<int>::format(42, ctx);
}
};
FMT_END_NAMESPACE
TEST(FormatterTest, CustomFormat) {
EXPECT_EQ("42", format("{0}", Answer()));
EXPECT_EQ("0042", format("{:04}", Answer()));
}
TEST(FormatterTest, CustomFormatTo) {
char buf[10] = {};
auto end =
&*fmt::format_to(fmt::detail::make_checked(buf, 10), "{}", Answer());
EXPECT_EQ(end, buf + 2);
EXPECT_STREQ(buf, "42");
}
TEST(FormatterTest, WideFormatString) {
EXPECT_EQ(L"42", format(L"{}", 42));
EXPECT_EQ(L"4.2", format(L"{}", 4.2));
EXPECT_EQ(L"abc", format(L"{}", L"abc"));
EXPECT_EQ(L"z", format(L"{}", L'z'));
}
TEST(FormatterTest, FormatStringFromSpeedTest) {
EXPECT_EQ("1.2340000000:0042:+3.13:str:0x3e8:X:%",
format("{0:0.10f}:{1:04}:{2:+g}:{3}:{4}:{5}:%", 1.234, 42, 3.13,
"str", reinterpret_cast<void*>(1000), 'X'));
}
TEST(FormatterTest, FormatExamples) {
std::string message = format("The answer is {}", 42);
EXPECT_EQ("The answer is 42", message);
EXPECT_EQ("42", format("{}", 42));
EXPECT_EQ("42", format(std::string("{}"), 42));
memory_buffer out;
format_to(out, "The answer is {}.", 42);
EXPECT_EQ("The answer is 42.", to_string(out));
const char* filename = "nonexistent";
FILE* ftest = safe_fopen(filename, "r");
if (ftest) fclose(ftest);
int error_code = errno;
EXPECT_TRUE(ftest == nullptr);
EXPECT_SYSTEM_ERROR(
{
FILE* f = safe_fopen(filename, "r");
if (!f)
throw fmt::system_error(errno, "Cannot open file '{}'", filename);
fclose(f);
},
error_code, "Cannot open file 'nonexistent'");
}
TEST(FormatterTest, Examples) {
EXPECT_EQ("First, thou shalt count to three",
format("First, thou shalt count to {0}", "three"));
EXPECT_EQ("Bring me a shrubbery", format("Bring me a {}", "shrubbery"));
EXPECT_EQ("From 1 to 3", format("From {} to {}", 1, 3));
char buffer[BUFFER_SIZE];
safe_sprintf(buffer, "%03.2f", -1.2);
EXPECT_EQ(buffer, format("{:03.2f}", -1.2));
EXPECT_EQ("a, b, c", format("{0}, {1}, {2}", 'a', 'b', 'c'));
EXPECT_EQ("a, b, c", format("{}, {}, {}", 'a', 'b', 'c'));
EXPECT_EQ("c, b, a", format("{2}, {1}, {0}", 'a', 'b', 'c'));
EXPECT_EQ("abracadabra", format("{0}{1}{0}", "abra", "cad"));
EXPECT_EQ("left aligned ", format("{:<30}", "left aligned"));
EXPECT_EQ(" right aligned",
format("{:>30}", "right aligned"));
EXPECT_EQ(" centered ", format("{:^30}", "centered"));
EXPECT_EQ("***********centered***********", format("{:*^30}", "centered"));
EXPECT_EQ("+3.140000; -3.140000", format("{:+f}; {:+f}", 3.14, -3.14));
EXPECT_EQ(" 3.140000; -3.140000", format("{: f}; {: f}", 3.14, -3.14));
EXPECT_EQ("3.140000; -3.140000", format("{:-f}; {:-f}", 3.14, -3.14));
EXPECT_EQ("int: 42; hex: 2a; oct: 52",
format("int: {0:d}; hex: {0:x}; oct: {0:o}", 42));
EXPECT_EQ("int: 42; hex: 0x2a; oct: 052",
format("int: {0:d}; hex: {0:#x}; oct: {0:#o}", 42));
EXPECT_EQ("The answer is 42", format("The answer is {}", 42));
EXPECT_THROW_MSG(format("The answer is {:d}", "forty-two"), format_error,
"invalid type specifier");
EXPECT_EQ(L"Cyrillic letter \x42e", format(L"Cyrillic letter {}", L'\x42e'));
EXPECT_WRITE(
stdout, fmt::print("{}", std::numeric_limits<double>::infinity()), "inf");
}
TEST(FormatIntTest, Data) {
fmt::format_int format_int(42);
EXPECT_EQ("42", std::string(format_int.data(), format_int.size()));
}
TEST(FormatIntTest, FormatInt) {
EXPECT_EQ("42", fmt::format_int(42).str());
EXPECT_EQ(2u, fmt::format_int(42).size());
EXPECT_EQ("-42", fmt::format_int(-42).str());
EXPECT_EQ(3u, fmt::format_int(-42).size());
EXPECT_EQ("42", fmt::format_int(42ul).str());
EXPECT_EQ("-42", fmt::format_int(-42l).str());
EXPECT_EQ("42", fmt::format_int(42ull).str());
EXPECT_EQ("-42", fmt::format_int(-42ll).str());
std::ostringstream os;
os << max_value<int64_t>();
EXPECT_EQ(os.str(), fmt::format_int(max_value<int64_t>()).str());
}
TEST(FormatTest, Print) {
#if FMT_USE_FCNTL
EXPECT_WRITE(stdout, fmt::print("Don't {}!", "panic"), "Don't panic!");
EXPECT_WRITE(stderr, fmt::print(stderr, "Don't {}!", "panic"),
"Don't panic!");
#endif
// Check that the wide print overload compiles.
if (fmt::detail::const_check(false)) fmt::print(L"test");
}
TEST(FormatTest, Variadic) {
EXPECT_EQ("abc1", format("{}c{}", "ab", 1));
EXPECT_EQ(L"abc1", format(L"{}c{}", L"ab", 1));
}
TEST(FormatTest, Dynamic) {
typedef fmt::format_context ctx;
std::vector<fmt::basic_format_arg<ctx>> args;
args.emplace_back(fmt::detail::make_arg<ctx>(42));
args.emplace_back(fmt::detail::make_arg<ctx>("abc1"));
args.emplace_back(fmt::detail::make_arg<ctx>(1.5f));
std::string result = fmt::vformat(
"{} and {} and {}",
fmt::basic_format_args<ctx>(args.data(), static_cast<int>(args.size())));
EXPECT_EQ("42 and abc1 and 1.5", result);
}
TEST(FormatTest, Bytes) {
auto s = fmt::format("{:10}", fmt::bytes("ёжик"));
EXPECT_EQ("ёжик ", s);
EXPECT_EQ(10, s.size());
}
TEST(FormatTest, JoinArg) {
using fmt::join;
int v1[3] = {1, 2, 3};
std::vector<float> v2;
v2.push_back(1.2f);
v2.push_back(3.4f);
void* v3[2] = {&v1[0], &v1[1]};
EXPECT_EQ("(1, 2, 3)", format("({})", join(v1, v1 + 3, ", ")));
EXPECT_EQ("(1)", format("({})", join(v1, v1 + 1, ", ")));
EXPECT_EQ("()", format("({})", join(v1, v1, ", ")));
EXPECT_EQ("(001, 002, 003)", format("({:03})", join(v1, v1 + 3, ", ")));
EXPECT_EQ("(+01.20, +03.40)",
format("({:+06.2f})", join(v2.begin(), v2.end(), ", ")));
EXPECT_EQ(L"(1, 2, 3)", format(L"({})", join(v1, v1 + 3, L", ")));
EXPECT_EQ("1, 2, 3", format("{0:{1}}", join(v1, v1 + 3, ", "), 1));
EXPECT_EQ(format("{}, {}", v3[0], v3[1]),
format("{}", join(v3, v3 + 2, ", ")));
#if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 405
EXPECT_EQ("(1, 2, 3)", format("({})", join(v1, ", ")));
EXPECT_EQ("(+01.20, +03.40)", format("({:+06.2f})", join(v2, ", ")));
#endif
}
template <typename T> std::string str(const T& value) {
return fmt::format("{}", value);
}
TEST(StrTest, Convert) {
EXPECT_EQ("42", str(42));
std::string s = str(Date(2012, 12, 9));
EXPECT_EQ("2012-12-9", s);
}
std::string vformat_message(int id, const char* format, fmt::format_args args) {
fmt::memory_buffer buffer;
format_to(buffer, "[{}] ", id);
vformat_to(buffer, format, args);
return to_string(buffer);
}
template <typename... Args>
std::string format_message(int id, const char* format, const Args&... args) {
auto va = fmt::make_format_args(args...);
return vformat_message(id, format, va);
}
TEST(FormatTest, FormatMessageExample) {
EXPECT_EQ("[42] something happened",
format_message(42, "{} happened", "something"));
}
template <typename... Args>
void print_error(const char* file, int line, const char* format,
const Args&... args) {
fmt::print("{}: {}: ", file, line);
fmt::print(format, args...);
}
TEST(FormatTest, UnpackedArgs) {
EXPECT_EQ("0123456789abcdefg",
fmt::format("{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}{}", 0, 1, 2, 3, 4, 5,
6, 7, 8, 9, 'a', 'b', 'c', 'd', 'e', 'f', 'g'));
}
struct string_like {};
fmt::string_view to_string_view(string_like) { return "foo"; }
constexpr char with_null[3] = {'{', '}', '\0'};
constexpr char no_null[2] = {'{', '}'};
TEST(FormatTest, CompileTimeString) {
EXPECT_EQ("42", fmt::format(FMT_STRING("{}"), 42));
EXPECT_EQ(L"42", fmt::format(FMT_STRING(L"{}"), 42));
EXPECT_EQ("foo", fmt::format(FMT_STRING("{}"), string_like()));
(void)with_null;
(void)no_null;
#if __cplusplus >= 201703L
EXPECT_EQ("42", fmt::format(FMT_STRING(with_null), 42));
EXPECT_EQ("42", fmt::format(FMT_STRING(no_null), 42));
#endif
#if defined(FMT_USE_STRING_VIEW) && __cplusplus >= 201703L
EXPECT_EQ("42", fmt::format(FMT_STRING(std::string_view("{}")), 42));
EXPECT_EQ(L"42", fmt::format(FMT_STRING(std::wstring_view(L"{}")), 42));
#endif
}
TEST(FormatTest, CustomFormatCompileTimeString) {
EXPECT_EQ("42", fmt::format(FMT_STRING("{}"), Answer()));
Answer answer;
EXPECT_EQ("42", fmt::format(FMT_STRING("{}"), answer));
char buf[10] = {};
fmt::format_to(buf, FMT_STRING("{}"), answer);
const Answer const_answer = Answer();
EXPECT_EQ("42", fmt::format(FMT_STRING("{}"), const_answer));
}
#if FMT_USE_USER_DEFINED_LITERALS
// Passing user-defined literals directly to EXPECT_EQ causes problems
// with macro argument stringification (#) on some versions of GCC.
// Workaround: Assing the UDL result to a variable before the macro.
using namespace fmt::literals;
TEST(LiteralsTest, Format) {
auto udl_format = "{}c{}"_format("ab", 1);
EXPECT_EQ(format("{}c{}", "ab", 1), udl_format);
auto udl_format_w = L"{}c{}"_format(L"ab", 1);
EXPECT_EQ(format(L"{}c{}", L"ab", 1), udl_format_w);
}
TEST(LiteralsTest, NamedArg) {
auto udl_a = format("{first}{second}{first}{third}", "first"_a = "abra",
"second"_a = "cad", "third"_a = 99);
EXPECT_EQ(format("{first}{second}{first}{third}", fmt::arg("first", "abra"),
fmt::arg("second", "cad"), fmt::arg("third", 99)),
udl_a);
auto udl_a_w = format(L"{first}{second}{first}{third}", L"first"_a = L"abra",
L"second"_a = L"cad", L"third"_a = 99);
EXPECT_EQ(
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_w);
}
TEST(FormatTest, UdlTemplate) {
EXPECT_EQ("foo", "foo"_format());
EXPECT_EQ(" 42", "{0:10}"_format(42));
}
TEST(FormatTest, UdlPassUserDefinedObjectAsLvalue) {
Date date(2015, 10, 21);
EXPECT_EQ("2015-10-21", "{}"_format(date));
}
#endif // FMT_USE_USER_DEFINED_LITERALS
enum TestEnum { A };
TEST(FormatTest, Enum) { EXPECT_EQ("0", fmt::format("{}", A)); }
TEST(FormatTest, FormatterNotSpecialized) {
static_assert(
!fmt::has_formatter<fmt::formatter<TestEnum>, fmt::format_context>::value,
"");
}
#if FMT_HAS_FEATURE(cxx_strong_enums)
enum big_enum : unsigned long long { big_enum_value = 5000000000ULL };
TEST(FormatTest, StrongEnum) {
EXPECT_EQ("5000000000", fmt::format("{}", big_enum_value));
}
#endif
using buffer_iterator = fmt::format_context::iterator;
class mock_arg_formatter
: public fmt::detail::arg_formatter_base<buffer_iterator, char> {
private:
#if FMT_USE_INT128
MOCK_METHOD1(call, void(__int128_t value));
#else
MOCK_METHOD1(call, void(long long value));
#endif
public:
using base = fmt::detail::arg_formatter_base<buffer_iterator, char>;
mock_arg_formatter(fmt::format_context& ctx, fmt::format_parse_context*,
fmt::format_specs* s = nullptr, const char* = nullptr)
: base(ctx.out(), s, ctx.locale()) {
EXPECT_CALL(*this, call(42));
}
template <typename T>
typename std::enable_if<fmt::detail::is_integral<T>::value, iterator>::type
operator()(T value) {
call(value);
return base::operator()(value);
}
template <typename T>
typename std::enable_if<!fmt::detail::is_integral<T>::value, iterator>::type
operator()(T value) {
return base::operator()(value);
}
iterator operator()(fmt::basic_format_arg<fmt::format_context>::handle) {
return base::operator()(fmt::monostate());
}
};
static void custom_vformat(fmt::string_view format_str, fmt::format_args args) {
fmt::memory_buffer buffer;
fmt::detail::buffer<char>& base = buffer;
fmt::vformat_to<mock_arg_formatter>(std::back_inserter(base), format_str,
args);
}
template <typename... Args>
void custom_format(const char* format_str, const Args&... args) {
auto va = fmt::make_format_args(args...);
return custom_vformat(format_str, va);
}
TEST(FormatTest, CustomArgFormatter) { custom_format("{}", 42); }
TEST(FormatTest, NonNullTerminatedFormatString) {
EXPECT_EQ("42", format(string_view("{}foo", 2), 42));
}
struct variant {
enum { INT, STRING } type;
explicit variant(int) : type(INT) {}
explicit variant(const char*) : type(STRING) {}
};
FMT_BEGIN_NAMESPACE
template <> struct formatter<variant> : dynamic_formatter<> {
auto format(variant value, format_context& ctx) -> decltype(ctx.out()) {
if (value.type == variant::INT) return dynamic_formatter<>::format(42, ctx);
return dynamic_formatter<>::format("foo", ctx);
}
};
FMT_END_NAMESPACE
TEST(FormatTest, DynamicFormatter) {
auto num = variant(42);
auto str = variant("foo");
EXPECT_EQ("42", format("{:d}", num));
EXPECT_EQ("foo", format("{:s}", str));
EXPECT_EQ(" 42 foo ", format("{:{}} {:{}}", num, 3, str, 4));
EXPECT_THROW_MSG(format("{0:{}}", num), format_error,
"cannot switch from manual to automatic argument indexing");
EXPECT_THROW_MSG(format("{:{0}}", num), format_error,
"cannot switch from automatic to manual argument indexing");
#if FMT_DEPRECATED_NUMERIC_ALIGN
EXPECT_THROW_MSG(format("{:=}", str), format_error,
"format specifier requires numeric argument");
#endif
EXPECT_THROW_MSG(format("{:+}", str), format_error,
"format specifier requires numeric argument");
EXPECT_THROW_MSG(format("{:-}", str), format_error,
"format specifier requires numeric argument");
EXPECT_THROW_MSG(format("{: }", str), format_error,
"format specifier requires numeric argument");
EXPECT_THROW_MSG(format("{:#}", str), format_error,
"format specifier requires numeric argument");
EXPECT_THROW_MSG(format("{:0}", str), format_error,
"format specifier requires numeric argument");
EXPECT_THROW_MSG(format("{:.2}", num), format_error,
"precision not allowed for this argument type");
}
namespace adl_test {
namespace fmt {
namespace detail {
struct foo {};
template <typename, typename OutputIt> void write(OutputIt, foo) = delete;
} // namespace detail
} // namespace fmt
} // namespace adl_test
FMT_BEGIN_NAMESPACE
template <>
struct formatter<adl_test::fmt::detail::foo> : formatter<std::string> {
template <typename FormatContext>
auto format(adl_test::fmt::detail::foo, FormatContext& ctx)
-> decltype(ctx.out()) {
return formatter<std::string>::format("foo", ctx);
}
};
FMT_END_NAMESPACE
TEST(FormatTest, ToString) {
EXPECT_EQ("42", fmt::to_string(42));
EXPECT_EQ("0x1234", fmt::to_string(reinterpret_cast<void*>(0x1234)));
EXPECT_EQ("foo", fmt::to_string(adl_test::fmt::detail::foo()));
}
TEST(FormatTest, ToWString) { EXPECT_EQ(L"42", fmt::to_wstring(42)); }
TEST(FormatTest, OutputIterators) {
std::list<char> out;
fmt::format_to(std::back_inserter(out), "{}", 42);
EXPECT_EQ("42", std::string(out.begin(), out.end()));
std::stringstream s;
fmt::format_to(std::ostream_iterator<char>(s), "{}", 42);
EXPECT_EQ("42", s.str());
}
TEST(FormatTest, FormattedSize) {
EXPECT_EQ(2u, fmt::formatted_size("{}", 42));
}
TEST(FormatTest, FormatToN) {
char buffer[4];
buffer[3] = 'x';
auto result = fmt::format_to_n(buffer, 3, "{}", 12345);
EXPECT_EQ(5u, result.size);
EXPECT_EQ(buffer + 3, result.out);
EXPECT_EQ("123x", fmt::string_view(buffer, 4));
result = fmt::format_to_n(buffer, 3, "{:s}", "foobar");
EXPECT_EQ(6u, result.size);
EXPECT_EQ(buffer + 3, result.out);
EXPECT_EQ("foox", fmt::string_view(buffer, 4));
buffer[0] = 'x';
buffer[1] = 'x';
buffer[2] = 'x';
result = fmt::format_to_n(buffer, 3, "{}", 'A');
EXPECT_EQ(1u, result.size);
EXPECT_EQ(buffer + 1, result.out);
EXPECT_EQ("Axxx", fmt::string_view(buffer, 4));
result = fmt::format_to_n(buffer, 3, "{}{} ", 'B', 'C');
EXPECT_EQ(3u, result.size);
EXPECT_EQ(buffer + 3, result.out);
EXPECT_EQ("BC x", fmt::string_view(buffer, 4));
}
TEST(FormatTest, WideFormatToN) {
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));
}
struct test_output_iterator {
char* data;
using iterator_category = std::output_iterator_tag;
using value_type = void;
using difference_type = void;
using pointer = void;
using reference = void;
test_output_iterator& operator++() {
++data;
return *this;
}
test_output_iterator operator++(int) {
auto tmp = *this;
++data;
return tmp;
}
char& operator*() { return *data; }
};
TEST(FormatTest, FormatToNOutputIterator) {
char buf[10] = {};
fmt::format_to_n(test_output_iterator{buf}, 10, "{}", 42);
EXPECT_STREQ(buf, "42");
}
#if FMT_USE_CONSTEXPR
struct test_arg_id_handler {
enum result { NONE, EMPTY, INDEX, NAME, ERROR };
result res = NONE;
int index = 0;
string_view name;
FMT_CONSTEXPR void operator()() { res = EMPTY; }
FMT_CONSTEXPR void operator()(int i) {
res = INDEX;
index = i;
}
FMT_CONSTEXPR void operator()(string_view n) {
res = NAME;
name = n;
}
FMT_CONSTEXPR void on_error(const char*) { res = ERROR; }
};
template <size_t N>
FMT_CONSTEXPR test_arg_id_handler parse_arg_id(const char (&s)[N]) {
test_arg_id_handler h;
fmt::detail::parse_arg_id(s, s + N, h);
return h;
}
TEST(FormatTest, ConstexprParseArgID) {
static_assert(parse_arg_id(":").res == test_arg_id_handler::EMPTY, "");
static_assert(parse_arg_id("}").res == test_arg_id_handler::EMPTY, "");
static_assert(parse_arg_id("42:").res == test_arg_id_handler::INDEX, "");
static_assert(parse_arg_id("42:").index == 42, "");
static_assert(parse_arg_id("foo:").res == test_arg_id_handler::NAME, "");
static_assert(parse_arg_id("foo:").name.size() == 3, "");
static_assert(parse_arg_id("!").res == test_arg_id_handler::ERROR, "");
}
struct test_format_specs_handler {
enum Result { NONE, PLUS, MINUS, SPACE, HASH, ZERO, ERROR };
Result res = NONE;
fmt::align_t align = fmt::align::none;
char fill = 0;
int width = 0;
fmt::detail::arg_ref<char> width_ref;
int precision = 0;
fmt::detail::arg_ref<char> precision_ref;
char type = 0;
// Workaround for MSVC2017 bug that results in "expression did not evaluate
// to a constant" with compiler-generated copy ctor.
FMT_CONSTEXPR test_format_specs_handler() {}
FMT_CONSTEXPR test_format_specs_handler(
const test_format_specs_handler& other)
: res(other.res),
align(other.align),
fill(other.fill),
width(other.width),
width_ref(other.width_ref),
precision(other.precision),
precision_ref(other.precision_ref),
type(other.type) {}
FMT_CONSTEXPR void on_align(fmt::align_t a) { align = a; }
FMT_CONSTEXPR void on_fill(fmt::string_view f) { fill = f[0]; }
FMT_CONSTEXPR void on_plus() { res = PLUS; }
FMT_CONSTEXPR void on_minus() { res = MINUS; }
FMT_CONSTEXPR void on_space() { res = SPACE; }
FMT_CONSTEXPR void on_hash() { res = HASH; }
FMT_CONSTEXPR void on_zero() { res = ZERO; }
FMT_CONSTEXPR void on_width(int w) { width = w; }
FMT_CONSTEXPR void on_dynamic_width(fmt::detail::auto_id) {}
FMT_CONSTEXPR void on_dynamic_width(int index) { width_ref = index; }
FMT_CONSTEXPR void on_dynamic_width(string_view) {}
FMT_CONSTEXPR void on_precision(int p) { precision = p; }
FMT_CONSTEXPR void on_dynamic_precision(fmt::detail::auto_id) {}
FMT_CONSTEXPR void on_dynamic_precision(int index) { precision_ref = index; }
FMT_CONSTEXPR void on_dynamic_precision(string_view) {}
FMT_CONSTEXPR void end_precision() {}
FMT_CONSTEXPR void on_type(char t) { type = t; }
FMT_CONSTEXPR void on_error(const char*) { res = ERROR; }
};
template <size_t N>
FMT_CONSTEXPR test_format_specs_handler parse_test_specs(const char (&s)[N]) {
test_format_specs_handler h;
fmt::detail::parse_format_specs(s, s + N, h);
return h;
}
TEST(FormatTest, ConstexprParseFormatSpecs) {
typedef test_format_specs_handler handler;
static_assert(parse_test_specs("<").align == fmt::align::left, "");
static_assert(parse_test_specs("*^").fill == '*', "");
static_assert(parse_test_specs("+").res == handler::PLUS, "");
static_assert(parse_test_specs("-").res == handler::MINUS, "");
static_assert(parse_test_specs(" ").res == handler::SPACE, "");
static_assert(parse_test_specs("#").res == handler::HASH, "");
static_assert(parse_test_specs("0").res == handler::ZERO, "");
static_assert(parse_test_specs("42").width == 42, "");
static_assert(parse_test_specs("{42}").width_ref.val.index == 42, "");
static_assert(parse_test_specs(".42").precision == 42, "");
static_assert(parse_test_specs(".{42}").precision_ref.val.index == 42, "");
static_assert(parse_test_specs("d").type == 'd', "");
static_assert(parse_test_specs("{<").res == handler::ERROR, "");
}
struct test_parse_context {
typedef char char_type;
FMT_CONSTEXPR int next_arg_id() { return 11; }
template <typename Id> FMT_CONSTEXPR void check_arg_id(Id) {}
FMT_CONSTEXPR const char* begin() { return nullptr; }
FMT_CONSTEXPR const char* end() { return nullptr; }
void on_error(const char*) {}
};
struct test_context {
using char_type = char;
using format_arg = fmt::basic_format_arg<test_context>;
using parse_context_type = fmt::format_parse_context;
template <typename T> struct formatter_type {
typedef fmt::formatter<T, char_type> type;
};
template <typename Id>
FMT_CONSTEXPR fmt::basic_format_arg<test_context> arg(Id id) {
return fmt::detail::make_arg<test_context>(id);
}
void on_error(const char*) {}
FMT_CONSTEXPR test_context error_handler() { return *this; }
};
template <size_t N>
FMT_CONSTEXPR fmt::format_specs parse_specs(const char (&s)[N]) {
auto specs = fmt::format_specs();
auto parse_ctx = test_parse_context();
auto ctx = test_context();
fmt::detail::specs_handler<test_parse_context, test_context> h(
specs, parse_ctx, ctx);
parse_format_specs(s, s + N, h);
return specs;
}
TEST(FormatTest, ConstexprSpecsHandler) {
static_assert(parse_specs("<").align == fmt::align::left, "");
static_assert(parse_specs("*^").fill[0] == '*', "");
static_assert(parse_specs("+").sign == fmt::sign::plus, "");
static_assert(parse_specs("-").sign == fmt::sign::minus, "");
static_assert(parse_specs(" ").sign == fmt::sign::space, "");
static_assert(parse_specs("#").alt, "");
static_assert(parse_specs("0").align == fmt::align::numeric, "");
static_assert(parse_specs("42").width == 42, "");
static_assert(parse_specs("{}").width == 11, "");
static_assert(parse_specs("{22}").width == 22, "");
static_assert(parse_specs(".42").precision == 42, "");
static_assert(parse_specs(".{}").precision == 11, "");
static_assert(parse_specs(".{22}").precision == 22, "");
static_assert(parse_specs("d").type == 'd', "");
}
template <size_t N>
FMT_CONSTEXPR fmt::detail::dynamic_format_specs<char> parse_dynamic_specs(
const char (&s)[N]) {
fmt::detail::dynamic_format_specs<char> specs;
test_parse_context ctx{};
fmt::detail::dynamic_specs_handler<test_parse_context> h(specs, ctx);
parse_format_specs(s, s + N, h);
return specs;
}
TEST(FormatTest, ConstexprDynamicSpecsHandler) {
static_assert(parse_dynamic_specs("<").align == fmt::align::left, "");
static_assert(parse_dynamic_specs("*^").fill[0] == '*', "");
static_assert(parse_dynamic_specs("+").sign == fmt::sign::plus, "");
static_assert(parse_dynamic_specs("-").sign == fmt::sign::minus, "");
static_assert(parse_dynamic_specs(" ").sign == fmt::sign::space, "");
static_assert(parse_dynamic_specs("#").alt, "");
static_assert(parse_dynamic_specs("0").align == fmt::align::numeric, "");
static_assert(parse_dynamic_specs("42").width == 42, "");
static_assert(parse_dynamic_specs("{}").width_ref.val.index == 11, "");
static_assert(parse_dynamic_specs("{42}").width_ref.val.index == 42, "");
static_assert(parse_dynamic_specs(".42").precision == 42, "");
static_assert(parse_dynamic_specs(".{}").precision_ref.val.index == 11, "");
static_assert(parse_dynamic_specs(".{42}").precision_ref.val.index == 42, "");
static_assert(parse_dynamic_specs("d").type == 'd', "");
}
template <size_t N>
FMT_CONSTEXPR test_format_specs_handler check_specs(const char (&s)[N]) {
fmt::detail::specs_checker<test_format_specs_handler> checker(
test_format_specs_handler(), fmt::detail::type::double_type);
parse_format_specs(s, s + N, checker);
return checker;
}
TEST(FormatTest, ConstexprSpecsChecker) {
typedef test_format_specs_handler handler;
static_assert(check_specs("<").align == fmt::align::left, "");
static_assert(check_specs("*^").fill == '*', "");
static_assert(check_specs("+").res == handler::PLUS, "");
static_assert(check_specs("-").res == handler::MINUS, "");
static_assert(check_specs(" ").res == handler::SPACE, "");
static_assert(check_specs("#").res == handler::HASH, "");
static_assert(check_specs("0").res == handler::ZERO, "");
static_assert(check_specs("42").width == 42, "");
static_assert(check_specs("{42}").width_ref.val.index == 42, "");
static_assert(check_specs(".42").precision == 42, "");
static_assert(check_specs(".{42}").precision_ref.val.index == 42, "");
static_assert(check_specs("d").type == 'd', "");
static_assert(check_specs("{<").res == handler::ERROR, "");
}
struct test_format_string_handler {
FMT_CONSTEXPR void on_text(const char*, const char*) {}
FMT_CONSTEXPR int on_arg_id() { return 0; }
template <typename T> FMT_CONSTEXPR int on_arg_id(T) { return 0; }
FMT_CONSTEXPR void on_replacement_field(int, const char*) {}
FMT_CONSTEXPR const char* on_format_specs(int, const char* begin,
const char*) {
return begin;
}
FMT_CONSTEXPR void on_error(const char*) { error = true; }
bool error = false;
};
template <size_t N> FMT_CONSTEXPR bool parse_string(const char (&s)[N]) {
test_format_string_handler h;
fmt::detail::parse_format_string<true>(fmt::string_view(s, N - 1), h);
return !h.error;
}
TEST(FormatTest, ConstexprParseFormatString) {
static_assert(parse_string("foo"), "");
static_assert(!parse_string("}"), "");
static_assert(parse_string("{}"), "");
static_assert(parse_string("{42}"), "");
static_assert(parse_string("{foo}"), "");
static_assert(parse_string("{:}"), "");
}
struct test_error_handler {
const char*& error;
FMT_CONSTEXPR test_error_handler(const char*& err) : error(err) {}
FMT_CONSTEXPR test_error_handler(const test_error_handler& other)
: error(other.error) {}
FMT_CONSTEXPR void on_error(const char* message) {
if (!error) error = message;
}
};
FMT_CONSTEXPR size_t len(const char* s) {
size_t len = 0;
while (*s++) ++len;
return len;
}
FMT_CONSTEXPR bool equal(const char* s1, const char* s2) {
if (!s1 || !s2) return s1 == s2;
while (*s1 && *s1 == *s2) {
++s1;
++s2;
}
return *s1 == *s2;
}
template <typename... Args>
FMT_CONSTEXPR bool test_error(const char* fmt, const char* expected_error) {
const char* actual_error = nullptr;
string_view s(fmt, len(fmt));
fmt::detail::format_string_checker<char, test_error_handler, Args...> checker(
s, test_error_handler(actual_error));
fmt::detail::parse_format_string<true>(s, checker);
return equal(actual_error, expected_error);
}
# define EXPECT_ERROR_NOARGS(fmt, error) \
static_assert(test_error(fmt, error), "")
# define EXPECT_ERROR(fmt, error, ...) \
static_assert(test_error<__VA_ARGS__>(fmt, error), "")
TEST(FormatTest, FormatStringErrors) {
EXPECT_ERROR_NOARGS("foo", nullptr);
EXPECT_ERROR_NOARGS("}", "unmatched '}' in format string");
EXPECT_ERROR("{0:s", "unknown format specifier", Date);
# if !FMT_MSC_VER || FMT_MSC_VER >= 1916
// This causes an detail compiler error in MSVC2017.
EXPECT_ERROR("{:{<}", "invalid fill character '{'", int);
EXPECT_ERROR("{:10000000000}", "number is too big", int);
EXPECT_ERROR("{:.10000000000}", "number is too big", int);
EXPECT_ERROR_NOARGS("{:x}", "argument not found");
# if FMT_DEPRECATED_NUMERIC_ALIGN
EXPECT_ERROR("{0:=5", "unknown format specifier", int);
EXPECT_ERROR("{:=}", "format specifier requires numeric argument",
const char*);
# endif
EXPECT_ERROR("{:+}", "format specifier requires numeric argument",
const char*);
EXPECT_ERROR("{:-}", "format specifier requires numeric argument",
const char*);
EXPECT_ERROR("{:#}", "format specifier requires numeric argument",
const char*);
EXPECT_ERROR("{: }", "format specifier requires numeric argument",
const char*);
EXPECT_ERROR("{:0}", "format specifier requires numeric argument",
const char*);
EXPECT_ERROR("{:+}", "format specifier requires signed argument", unsigned);
EXPECT_ERROR("{:-}", "format specifier requires signed argument", unsigned);
EXPECT_ERROR("{: }", "format specifier requires signed argument", unsigned);
EXPECT_ERROR("{:{}}", "argument not found", int);
EXPECT_ERROR("{:.{}}", "argument not found", double);
EXPECT_ERROR("{:.2}", "precision not allowed for this argument type", int);
EXPECT_ERROR("{:s}", "invalid type specifier", int);
EXPECT_ERROR("{:s}", "invalid type specifier", bool);
EXPECT_ERROR("{:s}", "invalid type specifier", char);
EXPECT_ERROR("{:+}", "invalid format specifier for char", char);
EXPECT_ERROR("{:s}", "invalid type specifier", double);
EXPECT_ERROR("{:d}", "invalid type specifier", const char*);
EXPECT_ERROR("{:d}", "invalid type specifier", std::string);
EXPECT_ERROR("{:s}", "invalid type specifier", void*);
# else
fmt::print("warning: constexpr is broken in this version of MSVC\n");
# endif
EXPECT_ERROR("{foo", "compile-time checks don't support named arguments",
int);
EXPECT_ERROR_NOARGS("{10000000000}", "number is too big");
EXPECT_ERROR_NOARGS("{0x}", "invalid format string");
EXPECT_ERROR_NOARGS("{-}", "invalid format string");
EXPECT_ERROR("{:{0x}}", "invalid format string", int);
EXPECT_ERROR("{:{-}}", "invalid format string", int);
EXPECT_ERROR("{:.{0x}}", "invalid format string", int);
EXPECT_ERROR("{:.{-}}", "invalid format string", int);
EXPECT_ERROR("{:.x}", "missing precision specifier", int);
EXPECT_ERROR_NOARGS("{}", "argument not found");
EXPECT_ERROR("{1}", "argument not found", int);
EXPECT_ERROR("{1}{}",
"cannot switch from manual to automatic argument indexing", int,
int);
EXPECT_ERROR("{}{1}",
"cannot switch from automatic to manual argument indexing", int,
int);
}
TEST(FormatTest, VFormatTo) {
typedef fmt::format_context context;
fmt::basic_format_arg<context> arg = fmt::detail::make_arg<context>(42);
fmt::basic_format_args<context> args(&arg, 1);
std::string s;
fmt::vformat_to(std::back_inserter(s), "{}", args);
EXPECT_EQ("42", s);
s.clear();
fmt::vformat_to(std::back_inserter(s), FMT_STRING("{}"), args);
EXPECT_EQ("42", s);
typedef fmt::wformat_context wcontext;
fmt::basic_format_arg<wcontext> warg = fmt::detail::make_arg<wcontext>(42);
fmt::basic_format_args<wcontext> wargs(&warg, 1);
std::wstring w;
fmt::vformat_to(std::back_inserter(w), L"{}", wargs);
EXPECT_EQ(L"42", w);
w.clear();
fmt::vformat_to(std::back_inserter(w), FMT_STRING(L"{}"), wargs);
EXPECT_EQ(L"42", w);
}
template <typename T> static std::string FmtToString(const T& t) {
return fmt::format(FMT_STRING("{}"), t);
}
TEST(FormatTest, FmtStringInTemplate) {
EXPECT_EQ(FmtToString(1), "1");
EXPECT_EQ(FmtToString(0), "0");
}
#endif // FMT_USE_CONSTEXPR
TEST(FormatTest, EmphasisNonHeaderOnly) {
// Ensure this compiles even if FMT_HEADER_ONLY is not defined.
EXPECT_EQ(fmt::format(fmt::emphasis::bold, "bold error"),
"\x1b[1mbold error\x1b[0m");
}
TEST(FormatTest, CharTraitsIsNotAmbiguous) {
// Test that we don't inject detail names into the std namespace.
using namespace std;
char_traits<char>::char_type c;
(void)c;
#if __cplusplus >= 201103L
std::string s;
auto lval = begin(s);
(void)lval;
#endif
}
struct mychar {
int value;
mychar() = default;
template <typename T> mychar(T val) : value(static_cast<int>(val)) {}
operator int() const { return value; }
};
FMT_BEGIN_NAMESPACE
template <> struct is_char<mychar> : std::true_type {};
FMT_END_NAMESPACE
TEST(FormatTest, FormatCustomChar) {
const mychar format[] = {'{', '}', 0};
auto result = fmt::format(format, mychar('x'));
EXPECT_EQ(result.size(), 1);
EXPECT_EQ(result[0], mychar('x'));
}
// Convert a char8_t string to std::string. Otherwise GTest will insist on
// inserting `char8_t` NTBS into a `char` stream which is disabled by P1423.
template <typename S> std::string from_u8str(const S& str) {
return std::string(str.begin(), str.end());
}
TEST(FormatTest, FormatUTF8Precision) {
using str_type = std::basic_string<fmt::detail::char8_type>;
str_type format(reinterpret_cast<const fmt::detail::char8_type*>(u8"{:.4}"));
str_type str(reinterpret_cast<const fmt::detail::char8_type*>(
u8"caf\u00e9s")); // cafés
auto result = fmt::format(format, str);
EXPECT_EQ(fmt::detail::count_code_points(result), 4);
EXPECT_EQ(result.size(), 5);
EXPECT_EQ(from_u8str(result), from_u8str(str.substr(0, 5)));
}