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240 lines
7.7 KiB
C++
240 lines
7.7 KiB
C++
// Formatting library for C++ - formatting library implementation tests
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//
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// Copyright (c) 2012 - present, Victor Zverovich
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// All rights reserved.
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//
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// For the license information refer to format.h.
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#define FMT_NOEXCEPT
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#undef FMT_SHARED
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#include "test-assert.h"
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// Include format.cc instead of format.h to test implementation.
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#include "../src/format.cc"
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#include "fmt/printf.h"
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#include <algorithm>
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#include <cstring>
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#include "gmock.h"
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#include "gtest-extra.h"
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#include "util.h"
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#undef max
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using fmt::internal::fp;
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template <bool is_iec559> void test_construct_from_double() {
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fmt::print("warning: double is not IEC559, skipping FP tests\n");
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}
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template <> void test_construct_from_double<true>() {
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auto v = fp(1.23);
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EXPECT_EQ(v.f, 0x13ae147ae147aeu);
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EXPECT_EQ(v.e, -52);
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}
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TEST(FPTest, ConstructFromDouble) {
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test_construct_from_double<std::numeric_limits<double>::is_iec559>();
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}
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TEST(FPTest, Normalize) {
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auto v = fp(0xbeef, 42);
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v.normalize();
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EXPECT_EQ(0xbeef000000000000, v.f);
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EXPECT_EQ(-6, v.e);
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}
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TEST(FPTest, ComputeBoundariesSubnormal) {
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auto v = fp(0xbeef, 42);
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fp lower, upper;
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v.compute_boundaries(lower, upper);
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EXPECT_EQ(0xbeee800000000000, lower.f);
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EXPECT_EQ(-6, lower.e);
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EXPECT_EQ(0xbeef800000000000, upper.f);
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EXPECT_EQ(-6, upper.e);
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}
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TEST(FPTest, ComputeBoundaries) {
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auto v = fp(0x10000000000000, 42);
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fp lower, upper;
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v.compute_boundaries(lower, upper);
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EXPECT_EQ(0x7ffffffffffffe00, lower.f);
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EXPECT_EQ(31, lower.e);
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EXPECT_EQ(0x8000000000000400, upper.f);
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EXPECT_EQ(31, upper.e);
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}
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TEST(FPTest, Subtract) {
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auto v = fp(123, 1) - fp(102, 1);
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EXPECT_EQ(v.f, 21u);
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EXPECT_EQ(v.e, 1);
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}
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TEST(FPTest, Multiply) {
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auto v = fp(123ULL << 32, 4) * fp(56ULL << 32, 7);
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EXPECT_EQ(v.f, 123u * 56u);
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EXPECT_EQ(v.e, 4 + 7 + 64);
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v = fp(123ULL << 32, 4) * fp(567ULL << 31, 8);
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EXPECT_EQ(v.f, (123 * 567 + 1u) / 2);
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EXPECT_EQ(v.e, 4 + 8 + 64);
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}
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TEST(FPTest, GetCachedPower) {
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typedef std::numeric_limits<double> limits;
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for (auto exp = limits::min_exponent; exp <= limits::max_exponent; ++exp) {
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int dec_exp = 0;
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auto fp = fmt::internal::get_cached_power(exp, dec_exp);
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EXPECT_LE(exp, fp.e);
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int dec_exp_step = 8;
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EXPECT_LE(fp.e, exp + dec_exp_step * log2(10));
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EXPECT_DOUBLE_EQ(pow(10, dec_exp), ldexp(static_cast<double>(fp.f), fp.e));
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}
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}
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TEST(FPTest, GetRoundDirection) {
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using fmt::internal::get_round_direction;
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EXPECT_EQ(fmt::internal::down, get_round_direction(100, 50, 0));
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EXPECT_EQ(fmt::internal::up, get_round_direction(100, 51, 0));
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EXPECT_EQ(fmt::internal::down, get_round_direction(100, 40, 10));
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EXPECT_EQ(fmt::internal::up, get_round_direction(100, 60, 10));
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for (int i = 41; i < 60; ++i)
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EXPECT_EQ(fmt::internal::unknown, get_round_direction(100, i, 10));
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uint64_t max = std::numeric_limits<uint64_t>::max();
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EXPECT_THROW(get_round_direction(100, 100, 0), assertion_failure);
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EXPECT_THROW(get_round_direction(100, 0, 100), assertion_failure);
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EXPECT_THROW(get_round_direction(100, 0, 50), assertion_failure);
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// Check that remainder + error doesn't overflow.
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EXPECT_EQ(fmt::internal::up, get_round_direction(max, max - 1, 2));
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// Check that 2 * (remainder + error) doesn't overflow.
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EXPECT_EQ(fmt::internal::unknown,
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get_round_direction(max, max / 2 + 1, max / 2));
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// Check that remainder - error doesn't overflow.
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EXPECT_EQ(fmt::internal::unknown, get_round_direction(100, 40, 41));
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// Check that 2 * (remainder - error) doesn't overflow.
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EXPECT_EQ(fmt::internal::up, get_round_direction(max, max - 1, 1));
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}
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TEST(FPTest, FixedHandler) {
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struct handler : fmt::internal::fixed_handler {
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char buffer[10];
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handler(int prec = 0) : fmt::internal::fixed_handler() {
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buf = buffer;
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precision = prec;
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}
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};
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int exp = 0;
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handler().on_digit('0', 100, 99, 0, exp, false);
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EXPECT_THROW(handler().on_digit('0', 100, 100, 0, exp, false),
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assertion_failure);
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namespace digits = fmt::internal::digits;
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EXPECT_EQ(handler(1).on_digit('0', 100, 10, 10, exp, false), digits::done);
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// Check that divisor - error doesn't overflow.
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EXPECT_EQ(handler(1).on_digit('0', 100, 10, 101, exp, false), digits::error);
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// Check that 2 * error doesn't overflow.
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uint64_t max = std::numeric_limits<uint64_t>::max();
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EXPECT_EQ(handler(1).on_digit('0', max, 10, max - 1, exp, false),
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digits::error);
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}
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TEST(FPTest, Grisu2FormatCompilesWithNonIEEEDouble) {
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fmt::memory_buffer buf;
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int exp = 0;
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grisu2_format(4.2f, buf, -1, false, exp);
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}
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template <typename T> struct ValueExtractor : fmt::internal::function<T> {
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T operator()(T value) { return value; }
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template <typename U> FMT_NORETURN T operator()(U) {
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throw std::runtime_error(fmt::format("invalid type {}", typeid(U).name()));
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}
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};
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TEST(FormatTest, ArgConverter) {
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long long value = std::numeric_limits<long long>::max();
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auto arg = fmt::internal::make_arg<fmt::format_context>(value);
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fmt::visit_format_arg(
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fmt::internal::arg_converter<long long, fmt::format_context>(arg, 'd'),
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arg);
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EXPECT_EQ(value, fmt::visit_format_arg(ValueExtractor<long long>(), arg));
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}
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TEST(FormatTest, FormatNegativeNaN) {
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double nan = std::numeric_limits<double>::quiet_NaN();
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if (std::signbit(-nan))
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EXPECT_EQ("-nan", fmt::format("{}", -nan));
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else
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fmt::print("Warning: compiler doesn't handle negative NaN correctly");
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}
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TEST(FormatTest, StrError) {
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char* message = FMT_NULL;
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char buffer[BUFFER_SIZE];
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EXPECT_ASSERT(fmt::safe_strerror(EDOM, message = FMT_NULL, 0),
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"invalid buffer");
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EXPECT_ASSERT(fmt::safe_strerror(EDOM, message = buffer, 0),
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"invalid buffer");
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buffer[0] = 'x';
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#if defined(_GNU_SOURCE) && !defined(__COVERITY__)
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// Use invalid error code to make sure that safe_strerror returns an error
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// message in the buffer rather than a pointer to a static string.
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int error_code = -1;
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#else
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int error_code = EDOM;
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#endif
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int result = fmt::safe_strerror(error_code, message = buffer, BUFFER_SIZE);
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EXPECT_EQ(result, 0);
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std::size_t message_size = std::strlen(message);
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EXPECT_GE(BUFFER_SIZE - 1u, message_size);
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EXPECT_EQ(get_system_error(error_code), message);
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// safe_strerror never uses buffer on MinGW.
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#ifndef __MINGW32__
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result = fmt::safe_strerror(error_code, message = buffer, message_size);
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EXPECT_EQ(ERANGE, result);
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result = fmt::safe_strerror(error_code, message = buffer, 1);
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EXPECT_EQ(buffer, message); // Message should point to buffer.
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EXPECT_EQ(ERANGE, result);
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EXPECT_STREQ("", message);
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#endif
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}
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TEST(FormatTest, FormatErrorCode) {
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std::string msg = "error 42", sep = ": ";
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{
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fmt::memory_buffer buffer;
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format_to(buffer, "garbage");
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fmt::format_error_code(buffer, 42, "test");
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EXPECT_EQ("test: " + msg, to_string(buffer));
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}
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{
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fmt::memory_buffer buffer;
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std::string prefix(fmt::inline_buffer_size - msg.size() - sep.size() + 1,
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'x');
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fmt::format_error_code(buffer, 42, prefix);
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EXPECT_EQ(msg, to_string(buffer));
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}
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int codes[] = {42, -1};
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for (std::size_t i = 0, n = sizeof(codes) / sizeof(*codes); i < n; ++i) {
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// Test maximum buffer size.
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msg = fmt::format("error {}", codes[i]);
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fmt::memory_buffer buffer;
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std::string prefix(fmt::inline_buffer_size - msg.size() - sep.size(), 'x');
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fmt::format_error_code(buffer, codes[i], prefix);
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EXPECT_EQ(prefix + sep + msg, to_string(buffer));
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std::size_t size = fmt::inline_buffer_size;
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EXPECT_EQ(size, buffer.size());
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buffer.resize(0);
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// Test with a message that doesn't fit into the buffer.
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prefix += 'x';
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fmt::format_error_code(buffer, codes[i], prefix);
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EXPECT_EQ(msg, to_string(buffer));
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}
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}
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TEST(FormatTest, CountCodePoints) {
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EXPECT_EQ(4, fmt::internal::count_code_points(fmt::u8string_view("ёжик")));
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}
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