fmt/test/format-impl-test.cc
2020-09-11 07:20:16 -07:00

457 lines
15 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 <algorithm>
#include <cstring>
#include "../src/format.cc"
#include "fmt/printf.h"
#include "gmock.h"
#include "gtest-extra.h"
#include "util.h"
#undef max
using fmt::detail::bigint;
using fmt::detail::fp;
using fmt::detail::max_value;
static_assert(!std::is_copy_constructible<bigint>::value, "");
static_assert(!std::is_copy_assignable<bigint>::value, "");
TEST(BigIntTest, Construct) {
EXPECT_EQ("", fmt::format("{}", bigint()));
EXPECT_EQ("42", fmt::format("{}", bigint(0x42)));
EXPECT_EQ("123456789abcedf0", fmt::format("{}", bigint(0x123456789abcedf0)));
}
TEST(BigIntTest, Compare) {
bigint n1(42);
bigint n2(42);
EXPECT_EQ(compare(n1, n2), 0);
n2 <<= 32;
EXPECT_LT(compare(n1, n2), 0);
bigint n3(43);
EXPECT_LT(compare(n1, n3), 0);
EXPECT_GT(compare(n3, n1), 0);
bigint n4(42 * 0x100000001);
EXPECT_LT(compare(n2, n4), 0);
EXPECT_GT(compare(n4, n2), 0);
}
TEST(BigIntTest, AddCompare) {
EXPECT_LT(
add_compare(bigint(0xffffffff), bigint(0xffffffff), bigint(1) <<= 64), 0);
EXPECT_LT(add_compare(bigint(1) <<= 32, bigint(1), bigint(1) <<= 96), 0);
EXPECT_GT(add_compare(bigint(1) <<= 32, bigint(0), bigint(0xffffffff)), 0);
EXPECT_GT(add_compare(bigint(0), bigint(1) <<= 32, bigint(0xffffffff)), 0);
EXPECT_GT(add_compare(bigint(42), bigint(1), bigint(42)), 0);
EXPECT_GT(add_compare(bigint(0xffffffff), bigint(1), bigint(0xffffffff)), 0);
EXPECT_LT(add_compare(bigint(10), bigint(10), bigint(22)), 0);
EXPECT_LT(add_compare(bigint(0x100000010), bigint(0x100000010),
bigint(0x300000010)),
0);
EXPECT_GT(add_compare(bigint(0x1ffffffff), bigint(0x100000002),
bigint(0x300000000)),
0);
EXPECT_EQ(add_compare(bigint(0x1ffffffff), bigint(0x100000002),
bigint(0x300000001)),
0);
EXPECT_LT(add_compare(bigint(0x1ffffffff), bigint(0x100000002),
bigint(0x300000002)),
0);
EXPECT_LT(add_compare(bigint(0x1ffffffff), bigint(0x100000002),
bigint(0x300000003)),
0);
}
TEST(BigIntTest, ShiftLeft) {
bigint n(0x42);
n <<= 0;
EXPECT_EQ("42", fmt::format("{}", n));
n <<= 1;
EXPECT_EQ("84", fmt::format("{}", n));
n <<= 25;
EXPECT_EQ("108000000", fmt::format("{}", n));
}
TEST(BigIntTest, Multiply) {
bigint n(0x42);
EXPECT_THROW(n *= 0, assertion_failure);
n *= 1;
EXPECT_EQ("42", fmt::format("{}", n));
n *= 2;
EXPECT_EQ("84", fmt::format("{}", n));
n *= 0x12345678;
EXPECT_EQ("962fc95e0", fmt::format("{}", n));
bigint bigmax(max_value<uint32_t>());
bigmax *= max_value<uint32_t>();
EXPECT_EQ("fffffffe00000001", fmt::format("{}", bigmax));
bigmax.assign(max_value<uint64_t>());
bigmax *= max_value<uint64_t>();
EXPECT_EQ("fffffffffffffffe0000000000000001", fmt::format("{}", bigmax));
}
TEST(BigIntTest, Accumulator) {
fmt::detail::accumulator acc;
EXPECT_EQ(acc.lower, 0);
EXPECT_EQ(acc.upper, 0);
acc.upper = 12;
acc.lower = 34;
EXPECT_EQ(static_cast<uint32_t>(acc), 34);
acc += 56;
EXPECT_EQ(acc.lower, 90);
acc += fmt::detail::max_value<uint64_t>();
EXPECT_EQ(acc.upper, 13);
EXPECT_EQ(acc.lower, 89);
acc >>= 32;
EXPECT_EQ(acc.upper, 0);
EXPECT_EQ(acc.lower, 13 * 0x100000000);
}
TEST(BigIntTest, Square) {
bigint n0(0);
n0.square();
EXPECT_EQ("0", fmt::format("{}", n0));
bigint n1(0x100);
n1.square();
EXPECT_EQ("10000", fmt::format("{}", n1));
bigint n2(0xfffffffff);
n2.square();
EXPECT_EQ("ffffffffe000000001", fmt::format("{}", n2));
bigint n3(max_value<uint64_t>());
n3.square();
EXPECT_EQ("fffffffffffffffe0000000000000001", fmt::format("{}", n3));
bigint n4;
n4.assign_pow10(10);
EXPECT_EQ("2540be400", fmt::format("{}", n4));
}
TEST(BigIntTest, DivModAssignZeroDivisor) {
bigint zero(0);
EXPECT_THROW(bigint(0).divmod_assign(zero), assertion_failure);
EXPECT_THROW(bigint(42).divmod_assign(zero), assertion_failure);
}
TEST(BigIntTest, DivModAssignSelf) {
bigint n(100);
EXPECT_THROW(n.divmod_assign(n), assertion_failure);
}
TEST(BigIntTest, DivModAssignUnaligned) {
// (42 << 340) / pow(10, 100):
bigint n1(42);
n1 <<= 340;
bigint n2;
n2.assign_pow10(100);
int result = n1.divmod_assign(n2);
EXPECT_EQ(result, 9406);
EXPECT_EQ("10f8353019583bfc29ffc8f564e1b9f9d819dbb4cf783e4507eca1539220p96",
fmt::format("{}", n1));
}
TEST(BigIntTest, DivModAssign) {
// 100 / 10:
bigint n1(100);
int result = n1.divmod_assign(bigint(10));
EXPECT_EQ(result, 10);
EXPECT_EQ("0", fmt::format("{}", n1));
// pow(10, 100) / (42 << 320):
n1.assign_pow10(100);
result = n1.divmod_assign(bigint(42) <<= 320);
EXPECT_EQ(result, 111);
EXPECT_EQ("13ad2594c37ceb0b2784c4ce0bf38ace408e211a7caab24308a82e8f10p96",
fmt::format("{}", n1));
// 42 / 100:
bigint n2(42);
n1.assign_pow10(2);
result = n2.divmod_assign(n1);
EXPECT_EQ(result, 0);
EXPECT_EQ("2a", fmt::format("{}", n2));
}
template <bool is_iec559> void run_double_tests() {
fmt::print("warning: double is not IEC559, skipping FP tests\n");
}
template <> void run_double_tests<true>() {
// Construct from double.
EXPECT_EQ(fp(1.23), fp(0x13ae147ae147aeu, -52));
// Compute boundaries:
fp value;
// Normalized & not power of 2 - equidistant boundaries:
auto b = value.assign_with_boundaries(1.23);
EXPECT_EQ(value, fp(0x0013ae147ae147ae, -52));
EXPECT_EQ(b.lower, 0x9d70a3d70a3d6c00);
EXPECT_EQ(b.upper, 0x9d70a3d70a3d7400);
// Normalized power of 2 - lower boundary is closer:
b = value.assign_with_boundaries(1.9807040628566084e+28); // 2**94
EXPECT_EQ(value, fp(0x0010000000000000, 42));
EXPECT_EQ(b.lower, 0x7ffffffffffffe00);
EXPECT_EQ(b.upper, 0x8000000000000400);
// Smallest normalized double - equidistant boundaries:
b = value.assign_with_boundaries(2.2250738585072014e-308);
EXPECT_EQ(value, fp(0x0010000000000000, -1074));
EXPECT_EQ(b.lower, 0x7ffffffffffffc00);
EXPECT_EQ(b.upper, 0x8000000000000400);
// Subnormal - equidistant boundaries:
b = value.assign_with_boundaries(4.9406564584124654e-324);
EXPECT_EQ(value, fp(0x0000000000000001, -1074));
EXPECT_EQ(b.lower, 0x4000000000000000);
EXPECT_EQ(b.upper, 0xc000000000000000);
}
TEST(FPTest, DoubleTests) {
run_double_tests<std::numeric_limits<double>::is_iec559>();
}
TEST(FPTest, Normalize) {
const auto v = fp(0xbeef, 42);
auto normalized = normalize(v);
EXPECT_EQ(0xbeef000000000000, normalized.f);
EXPECT_EQ(-6, normalized.e);
}
TEST(FPTest, ComputeFloatBoundaries) {
struct {
double x, lower, upper;
} tests[] = {
// regular
{1.5f, 1.4999999403953552, 1.5000000596046448},
// boundary
{1.0f, 0.9999999701976776, 1.0000000596046448},
// min normal
{1.1754944e-38f, 1.1754942807573643e-38, 1.1754944208872107e-38},
// max subnormal
{1.1754942e-38f, 1.1754941406275179e-38, 1.1754942807573643e-38},
// min subnormal
{1e-45f, 7.006492321624085e-46, 2.1019476964872256e-45},
};
for (auto test : tests) {
fp vlower = normalize(fp(test.lower));
fp vupper = normalize(fp(test.upper));
vlower.f >>= vupper.e - vlower.e;
vlower.e = vupper.e;
fp value;
auto b = value.assign_float_with_boundaries(test.x);
EXPECT_EQ(vlower.f, b.lower);
EXPECT_EQ(vupper.f, b.upper);
}
}
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::detail::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::detail::get_round_direction;
using fmt::detail::round_direction;
EXPECT_EQ(round_direction::down, get_round_direction(100, 50, 0));
EXPECT_EQ(round_direction::up, get_round_direction(100, 51, 0));
EXPECT_EQ(round_direction::down, get_round_direction(100, 40, 10));
EXPECT_EQ(round_direction::up, get_round_direction(100, 60, 10));
for (size_t i = 41; i < 60; ++i)
EXPECT_EQ(round_direction::unknown, get_round_direction(100, i, 10));
uint64_t max = max_value<uint64_t>();
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(round_direction::up, get_round_direction(max, max - 1, 2));
// Check that 2 * (remainder + error) doesn't overflow.
EXPECT_EQ(round_direction::unknown,
get_round_direction(max, max / 2 + 1, max / 2));
// Check that remainder - error doesn't overflow.
EXPECT_EQ(round_direction::unknown, get_round_direction(100, 40, 41));
// Check that 2 * (remainder - error) doesn't overflow.
EXPECT_EQ(round_direction::up, get_round_direction(max, max - 1, 1));
}
TEST(FPTest, FixedHandler) {
struct handler : fmt::detail::fixed_handler {
char buffer[10];
handler(int prec = 0) : fmt::detail::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::detail::digits;
EXPECT_EQ(handler(1).on_digit('0', 100, 10, 10, exp, false), digits::error);
// 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 = max_value<uint64_t>();
EXPECT_EQ(handler(1).on_digit('0', max, 10, max - 1, exp, false),
digits::error);
}
TEST(FPTest, GrisuFormatCompilesWithNonIEEEDouble) {
fmt::memory_buffer buf;
format_float(0.42, -1, fmt::detail::float_specs(), buf);
}
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()));
}
#if FMT_USE_INT128
// Apple Clang does not define typeid for __int128_t and __uint128_t.
FMT_NORETURN T operator()(fmt::detail::int128_t) {
throw std::runtime_error("invalid type __int128_t");
}
FMT_NORETURN T operator()(fmt::detail::uint128_t) {
throw std::runtime_error("invalid type __uint128_t");
}
#endif
};
TEST(FormatTest, ArgConverter) {
long long value = max_value<long long>();
auto arg = fmt::detail::make_arg<fmt::format_context>(value);
fmt::visit_format_arg(
fmt::detail::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::detail::safe_strerror(EDOM, message = nullptr, 0),
"invalid buffer");
EXPECT_ASSERT(fmt::detail::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::detail::safe_strerror(error_code, message = buffer, BUFFER_SIZE);
EXPECT_EQ(result, 0);
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.
#if !defined(__MINGW32__) && !defined(__sun)
result =
fmt::detail::safe_strerror(error_code, message = buffer, message_size);
EXPECT_EQ(ERANGE, result);
result = fmt::detail::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::detail::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::detail::format_error_code(buffer, 42, prefix);
EXPECT_EQ(msg, to_string(buffer));
}
int codes[] = {42, -1};
for (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::detail::format_error_code(buffer, codes[i], prefix);
EXPECT_EQ(prefix + sep + msg, to_string(buffer));
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::detail::format_error_code(buffer, codes[i], prefix);
EXPECT_EQ(msg, to_string(buffer));
}
}
TEST(FormatTest, CountCodePoints) {
EXPECT_EQ(4,
fmt::detail::count_code_points(
fmt::basic_string_view<fmt::detail::char8_type>(
reinterpret_cast<const fmt::detail::char8_type*>("ёжик"))));
}
// Tests fmt::detail::count_digits for integer type Int.
template <typename Int> void test_count_digits() {
for (Int i = 0; i < 10; ++i) EXPECT_EQ(1u, fmt::detail::count_digits(i));
for (Int i = 1, n = 1, end = max_value<Int>() / 10; n <= end; ++i) {
n *= 10;
EXPECT_EQ(i, fmt::detail::count_digits(n - 1));
EXPECT_EQ(i + 1, fmt::detail::count_digits(n));
}
}
TEST(UtilTest, CountDigits) {
test_count_digits<uint32_t>();
test_count_digits<uint64_t>();
}
TEST(UtilTest, WriteFallbackUIntPtr) {
std::string s;
fmt::detail::write_ptr<char>(
std::back_inserter(s),
fmt::detail::fallback_uintptr(reinterpret_cast<void*>(0xface)), nullptr);
EXPECT_EQ(s, "0xface");
}