mirror of
https://github.com/fmtlib/fmt.git
synced 2025-10-31 14:11:44 +01:00
265 lines
8.5 KiB
C++
265 lines
8.5 KiB
C++
// Formatting library for C++ - formatting library implementation tests
|
|
//
|
|
// Copyright (c) 2012 - present, Victor Zverovich
|
|
// All rights reserved.
|
|
//
|
|
// For the license information refer to format.h.
|
|
|
|
#define FMT_NOEXCEPT
|
|
#undef FMT_SHARED
|
|
#include "test-assert.h"
|
|
|
|
// Include format.cc instead of format.h to test implementation.
|
|
#include "../src/format.cc"
|
|
#include "fmt/printf.h"
|
|
|
|
#include <algorithm>
|
|
#include <cstring>
|
|
|
|
#include "gmock.h"
|
|
#include "gtest-extra.h"
|
|
#include "util.h"
|
|
|
|
#undef max
|
|
|
|
using fmt::internal::fp;
|
|
|
|
template <bool is_iec559> void test_construct_from_double() {
|
|
fmt::print("warning: double is not IEC559, skipping FP tests\n");
|
|
}
|
|
|
|
template <> void test_construct_from_double<true>() {
|
|
auto v = fp(1.23);
|
|
EXPECT_EQ(v.f, 0x13ae147ae147aeu);
|
|
EXPECT_EQ(v.e, -52);
|
|
}
|
|
|
|
TEST(FPTest, ConstructFromDouble) {
|
|
test_construct_from_double<std::numeric_limits<double>::is_iec559>();
|
|
}
|
|
|
|
TEST(FPTest, Normalize) {
|
|
auto v = fp(0xbeef, 42);
|
|
v.normalize();
|
|
EXPECT_EQ(0xbeef000000000000, v.f);
|
|
EXPECT_EQ(-6, v.e);
|
|
}
|
|
|
|
TEST(FPTest, ComputeBoundariesSubnormal) {
|
|
auto v = fp(0xbeef, 42);
|
|
fp lower, upper;
|
|
v.compute_boundaries(lower, upper);
|
|
EXPECT_EQ(0xbeee800000000000, lower.f);
|
|
EXPECT_EQ(-6, lower.e);
|
|
EXPECT_EQ(0xbeef800000000000, upper.f);
|
|
EXPECT_EQ(-6, upper.e);
|
|
}
|
|
|
|
TEST(FPTest, ComputeBoundaries) {
|
|
auto v = fp(0x10000000000000, 42);
|
|
fp lower, upper;
|
|
v.compute_boundaries(lower, upper);
|
|
EXPECT_EQ(0x7ffffffffffffe00, lower.f);
|
|
EXPECT_EQ(31, lower.e);
|
|
EXPECT_EQ(0x8000000000000400, upper.f);
|
|
EXPECT_EQ(31, upper.e);
|
|
}
|
|
|
|
TEST(FPTest, Subtract) {
|
|
auto v = fp(123, 1) - fp(102, 1);
|
|
EXPECT_EQ(v.f, 21u);
|
|
EXPECT_EQ(v.e, 1);
|
|
}
|
|
|
|
TEST(FPTest, Multiply) {
|
|
auto v = fp(123ULL << 32, 4) * fp(56ULL << 32, 7);
|
|
EXPECT_EQ(v.f, 123u * 56u);
|
|
EXPECT_EQ(v.e, 4 + 7 + 64);
|
|
v = fp(123ULL << 32, 4) * fp(567ULL << 31, 8);
|
|
EXPECT_EQ(v.f, (123 * 567 + 1u) / 2);
|
|
EXPECT_EQ(v.e, 4 + 8 + 64);
|
|
}
|
|
|
|
TEST(FPTest, GetCachedPower) {
|
|
typedef std::numeric_limits<double> limits;
|
|
for (auto exp = limits::min_exponent; exp <= limits::max_exponent; ++exp) {
|
|
int dec_exp = 0;
|
|
auto fp = fmt::internal::get_cached_power(exp, dec_exp);
|
|
EXPECT_LE(exp, fp.e);
|
|
int dec_exp_step = 8;
|
|
EXPECT_LE(fp.e, exp + dec_exp_step * log2(10));
|
|
EXPECT_DOUBLE_EQ(pow(10, dec_exp), ldexp(static_cast<double>(fp.f), fp.e));
|
|
}
|
|
}
|
|
|
|
TEST(FPTest, GetRoundDirection) {
|
|
using fmt::internal::get_round_direction;
|
|
EXPECT_EQ(fmt::internal::down, get_round_direction(100, 50, 0));
|
|
EXPECT_EQ(fmt::internal::up, get_round_direction(100, 51, 0));
|
|
EXPECT_EQ(fmt::internal::down, get_round_direction(100, 40, 10));
|
|
EXPECT_EQ(fmt::internal::up, get_round_direction(100, 60, 10));
|
|
for (int i = 41; i < 60; ++i)
|
|
EXPECT_EQ(fmt::internal::unknown, get_round_direction(100, i, 10));
|
|
uint64_t max = std::numeric_limits<uint64_t>::max();
|
|
EXPECT_THROW(get_round_direction(100, 100, 0), assertion_failure);
|
|
EXPECT_THROW(get_round_direction(100, 0, 100), assertion_failure);
|
|
EXPECT_THROW(get_round_direction(100, 0, 50), assertion_failure);
|
|
// Check that remainder + error doesn't overflow.
|
|
EXPECT_EQ(fmt::internal::up, get_round_direction(max, max - 1, 2));
|
|
// Check that 2 * (remainder + error) doesn't overflow.
|
|
EXPECT_EQ(fmt::internal::unknown,
|
|
get_round_direction(max, max / 2 + 1, max / 2));
|
|
// Check that remainder - error doesn't overflow.
|
|
EXPECT_EQ(fmt::internal::unknown, get_round_direction(100, 40, 41));
|
|
// Check that 2 * (remainder - error) doesn't overflow.
|
|
EXPECT_EQ(fmt::internal::up, get_round_direction(max, max - 1, 1));
|
|
}
|
|
|
|
TEST(FPTest, FixedHandler) {
|
|
struct handler : fmt::internal::fixed_handler {
|
|
char buffer[10];
|
|
handler(int prec = 0) : fmt::internal::fixed_handler() {
|
|
buf = buffer;
|
|
precision = prec;
|
|
}
|
|
};
|
|
int exp = 0;
|
|
handler().on_digit('0', 100, 99, 0, exp, false);
|
|
EXPECT_THROW(handler().on_digit('0', 100, 100, 0, exp, false),
|
|
assertion_failure);
|
|
namespace digits = fmt::internal::digits;
|
|
EXPECT_EQ(handler(1).on_digit('0', 100, 10, 10, exp, false), digits::done);
|
|
// Check that divisor - error doesn't overflow.
|
|
EXPECT_EQ(handler(1).on_digit('0', 100, 10, 101, exp, false), digits::error);
|
|
// Check that 2 * error doesn't overflow.
|
|
uint64_t max = std::numeric_limits<uint64_t>::max();
|
|
EXPECT_EQ(handler(1).on_digit('0', max, 10, max - 1, exp, false),
|
|
digits::error);
|
|
}
|
|
|
|
TEST(FPTest, GrisuFormatCompilesWithNonIEEEDouble) {
|
|
fmt::memory_buffer buf;
|
|
int exp = 0;
|
|
grisu_format(4.2f, buf, -1, false, exp);
|
|
}
|
|
|
|
template <typename T> struct value_extractor {
|
|
T operator()(T value) { return value; }
|
|
|
|
template <typename U> FMT_NORETURN T operator()(U) {
|
|
throw std::runtime_error(fmt::format("invalid type {}", typeid(U).name()));
|
|
}
|
|
};
|
|
|
|
TEST(FormatTest, ArgConverter) {
|
|
long long value = std::numeric_limits<long long>::max();
|
|
auto arg = fmt::internal::make_arg<fmt::format_context>(value);
|
|
fmt::visit_format_arg(
|
|
fmt::internal::arg_converter<long long, fmt::format_context>(arg, 'd'),
|
|
arg);
|
|
EXPECT_EQ(value, fmt::visit_format_arg(value_extractor<long long>(), arg));
|
|
}
|
|
|
|
TEST(FormatTest, FormatNegativeNaN) {
|
|
double nan = std::numeric_limits<double>::quiet_NaN();
|
|
if (std::signbit(-nan))
|
|
EXPECT_EQ("-nan", fmt::format("{}", -nan));
|
|
else
|
|
fmt::print("Warning: compiler doesn't handle negative NaN correctly");
|
|
}
|
|
|
|
TEST(FormatTest, StrError) {
|
|
char* message = nullptr;
|
|
char buffer[BUFFER_SIZE];
|
|
EXPECT_ASSERT(fmt::safe_strerror(EDOM, message = nullptr, 0),
|
|
"invalid buffer");
|
|
EXPECT_ASSERT(fmt::safe_strerror(EDOM, message = buffer, 0),
|
|
"invalid buffer");
|
|
buffer[0] = 'x';
|
|
#if defined(_GNU_SOURCE) && !defined(__COVERITY__)
|
|
// Use invalid error code to make sure that safe_strerror returns an error
|
|
// message in the buffer rather than a pointer to a static string.
|
|
int error_code = -1;
|
|
#else
|
|
int error_code = EDOM;
|
|
#endif
|
|
|
|
int result = fmt::safe_strerror(error_code, message = buffer, BUFFER_SIZE);
|
|
EXPECT_EQ(result, 0);
|
|
std::size_t message_size = std::strlen(message);
|
|
EXPECT_GE(BUFFER_SIZE - 1u, message_size);
|
|
EXPECT_EQ(get_system_error(error_code), message);
|
|
|
|
// safe_strerror never uses buffer on MinGW.
|
|
#ifndef __MINGW32__
|
|
result = fmt::safe_strerror(error_code, message = buffer, message_size);
|
|
EXPECT_EQ(ERANGE, result);
|
|
result = fmt::safe_strerror(error_code, message = buffer, 1);
|
|
EXPECT_EQ(buffer, message); // Message should point to buffer.
|
|
EXPECT_EQ(ERANGE, result);
|
|
EXPECT_STREQ("", message);
|
|
#endif
|
|
}
|
|
|
|
TEST(FormatTest, FormatErrorCode) {
|
|
std::string msg = "error 42", sep = ": ";
|
|
{
|
|
fmt::memory_buffer buffer;
|
|
format_to(buffer, "garbage");
|
|
fmt::format_error_code(buffer, 42, "test");
|
|
EXPECT_EQ("test: " + msg, to_string(buffer));
|
|
}
|
|
{
|
|
fmt::memory_buffer buffer;
|
|
std::string prefix(fmt::inline_buffer_size - msg.size() - sep.size() + 1,
|
|
'x');
|
|
fmt::format_error_code(buffer, 42, prefix);
|
|
EXPECT_EQ(msg, to_string(buffer));
|
|
}
|
|
int codes[] = {42, -1};
|
|
for (std::size_t i = 0, n = sizeof(codes) / sizeof(*codes); i < n; ++i) {
|
|
// Test maximum buffer size.
|
|
msg = fmt::format("error {}", codes[i]);
|
|
fmt::memory_buffer buffer;
|
|
std::string prefix(fmt::inline_buffer_size - msg.size() - sep.size(), 'x');
|
|
fmt::format_error_code(buffer, codes[i], prefix);
|
|
EXPECT_EQ(prefix + sep + msg, to_string(buffer));
|
|
std::size_t size = fmt::inline_buffer_size;
|
|
EXPECT_EQ(size, buffer.size());
|
|
buffer.resize(0);
|
|
// Test with a message that doesn't fit into the buffer.
|
|
prefix += 'x';
|
|
fmt::format_error_code(buffer, codes[i], prefix);
|
|
EXPECT_EQ(msg, to_string(buffer));
|
|
}
|
|
}
|
|
|
|
TEST(FormatTest, CountCodePoints) {
|
|
EXPECT_EQ(4, fmt::internal::count_code_points(fmt::u8string_view("ёжик")));
|
|
}
|
|
|
|
// Tests fmt::internal::count_digits for integer type Int.
|
|
template <typename Int> void test_count_digits() {
|
|
for (Int i = 0; i < 10; ++i) EXPECT_EQ(1u, fmt::internal::count_digits(i));
|
|
for (Int i = 1, n = 1, end = std::numeric_limits<Int>::max() / 10; n <= end;
|
|
++i) {
|
|
n *= 10;
|
|
EXPECT_EQ(i, fmt::internal::count_digits(n - 1));
|
|
EXPECT_EQ(i + 1, fmt::internal::count_digits(n));
|
|
}
|
|
}
|
|
|
|
TEST(UtilTest, CountDigits) {
|
|
test_count_digits<uint32_t>();
|
|
test_count_digits<uint64_t>();
|
|
}
|
|
|
|
TEST(UtilTest, WriteUIntPtr) {
|
|
fmt::memory_buffer buf;
|
|
fmt::writer writer(buf);
|
|
writer.write_pointer(fmt::internal::bit_cast<fmt::internal::uintptr>(
|
|
reinterpret_cast<void*>(0xface)),
|
|
nullptr);
|
|
EXPECT_EQ("0xface", to_string(buf));
|
|
}
|