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Diffstat (limited to 'third_party/abseil_cpp/absl/random/internal/iostream_state_saver_test.cc')
| -rw-r--r-- | third_party/abseil_cpp/absl/random/internal/iostream_state_saver_test.cc | 371 |
1 files changed, 0 insertions, 371 deletions
diff --git a/third_party/abseil_cpp/absl/random/internal/iostream_state_saver_test.cc b/third_party/abseil_cpp/absl/random/internal/iostream_state_saver_test.cc deleted file mode 100644 index 7bb8ad959c..0000000000 --- a/third_party/abseil_cpp/absl/random/internal/iostream_state_saver_test.cc +++ /dev/null @@ -1,371 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// https://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#include "absl/random/internal/iostream_state_saver.h" - -#include <sstream> -#include <string> - -#include "gtest/gtest.h" - -namespace { - -using absl::random_internal::make_istream_state_saver; -using absl::random_internal::make_ostream_state_saver; -using absl::random_internal::stream_precision_helper; - -template <typename T> -typename absl::enable_if_t<std::is_integral<T>::value, T> // -StreamRoundTrip(T t) { - std::stringstream ss; - { - auto saver = make_ostream_state_saver(ss); - ss.precision(stream_precision_helper<T>::kPrecision); - ss << t; - } - T result = 0; - { - auto saver = make_istream_state_saver(ss); - ss >> result; - } - EXPECT_FALSE(ss.fail()) // - << ss.str() << " " // - << (ss.good() ? "good " : "") // - << (ss.bad() ? "bad " : "") // - << (ss.eof() ? "eof " : "") // - << (ss.fail() ? "fail " : ""); - - return result; -} - -template <typename T> -typename absl::enable_if_t<std::is_floating_point<T>::value, T> // -StreamRoundTrip(T t) { - std::stringstream ss; - { - auto saver = make_ostream_state_saver(ss); - ss.precision(stream_precision_helper<T>::kPrecision); - ss << t; - } - T result = 0; - { - auto saver = make_istream_state_saver(ss); - result = absl::random_internal::read_floating_point<T>(ss); - } - EXPECT_FALSE(ss.fail()) // - << ss.str() << " " // - << (ss.good() ? "good " : "") // - << (ss.bad() ? "bad " : "") // - << (ss.eof() ? "eof " : "") // - << (ss.fail() ? "fail " : ""); - - return result; -} - -TEST(IOStreamStateSaver, BasicSaverState) { - std::stringstream ss; - ss.precision(2); - ss.fill('x'); - ss.flags(std::ios_base::dec | std::ios_base::right); - - { - auto saver = make_ostream_state_saver(ss); - ss.precision(10); - EXPECT_NE('x', ss.fill()); - EXPECT_EQ(10, ss.precision()); - EXPECT_NE(std::ios_base::dec | std::ios_base::right, ss.flags()); - - ss << 1.23; - } - - EXPECT_EQ('x', ss.fill()); - EXPECT_EQ(2, ss.precision()); - EXPECT_EQ(std::ios_base::dec | std::ios_base::right, ss.flags()); -} - -TEST(IOStreamStateSaver, RoundTripInts) { - const uint64_t kUintValues[] = { - 0, - 1, - static_cast<uint64_t>(-1), - 2, - static_cast<uint64_t>(-2), - - 1 << 7, - 1 << 8, - 1 << 16, - 1ull << 32, - 1ull << 50, - 1ull << 62, - 1ull << 63, - - (1 << 7) - 1, - (1 << 8) - 1, - (1 << 16) - 1, - (1ull << 32) - 1, - (1ull << 50) - 1, - (1ull << 62) - 1, - (1ull << 63) - 1, - - static_cast<uint64_t>(-(1 << 8)), - static_cast<uint64_t>(-(1 << 16)), - static_cast<uint64_t>(-(1ll << 32)), - static_cast<uint64_t>(-(1ll << 50)), - static_cast<uint64_t>(-(1ll << 62)), - - static_cast<uint64_t>(-(1 << 8) - 1), - static_cast<uint64_t>(-(1 << 16) - 1), - static_cast<uint64_t>(-(1ll << 32) - 1), - static_cast<uint64_t>(-(1ll << 50) - 1), - static_cast<uint64_t>(-(1ll << 62) - 1), - }; - - for (const uint64_t u : kUintValues) { - EXPECT_EQ(u, StreamRoundTrip<uint64_t>(u)); - - int64_t x = static_cast<int64_t>(u); - EXPECT_EQ(x, StreamRoundTrip<int64_t>(x)); - - double d = static_cast<double>(x); - EXPECT_EQ(d, StreamRoundTrip<double>(d)); - - float f = d; - EXPECT_EQ(f, StreamRoundTrip<float>(f)); - } -} - -TEST(IOStreamStateSaver, RoundTripFloats) { - static_assert( - stream_precision_helper<float>::kPrecision >= 9, - "stream_precision_helper<float>::kPrecision should be at least 9"); - - const float kValues[] = { - 1, - std::nextafter(1.0f, 0.0f), // 1 - epsilon - std::nextafter(1.0f, 2.0f), // 1 + epsilon - - 1.0e+1f, - 1.0e-1f, - 1.0e+2f, - 1.0e-2f, - 1.0e+10f, - 1.0e-10f, - - 0.00000051110000111311111111f, - -0.00000051110000111211111111f, - - 1.234678912345678912345e+6f, - 1.234678912345678912345e-6f, - 1.234678912345678912345e+30f, - 1.234678912345678912345e-30f, - 1.234678912345678912345e+38f, - 1.0234678912345678912345e-38f, - - // Boundary cases. - std::numeric_limits<float>::max(), - std::numeric_limits<float>::lowest(), - std::numeric_limits<float>::epsilon(), - std::nextafter(std::numeric_limits<float>::min(), - 1.0f), // min + epsilon - std::numeric_limits<float>::min(), // smallest normal - // There are some errors dealing with denorms on apple platforms. - std::numeric_limits<float>::denorm_min(), // smallest denorm - std::numeric_limits<float>::min() / 2, - std::nextafter(std::numeric_limits<float>::min(), - 0.0f), // denorm_max - std::nextafter(std::numeric_limits<float>::denorm_min(), 1.0f), - }; - - for (const float f : kValues) { - EXPECT_EQ(f, StreamRoundTrip<float>(f)); - EXPECT_EQ(-f, StreamRoundTrip<float>(-f)); - - double d = f; - EXPECT_EQ(d, StreamRoundTrip<double>(d)); - EXPECT_EQ(-d, StreamRoundTrip<double>(-d)); - - // Avoid undefined behavior (overflow/underflow). - if (f <= static_cast<float>(std::numeric_limits<int64_t>::max()) && - f >= static_cast<float>(std::numeric_limits<int64_t>::lowest())) { - int64_t x = static_cast<int64_t>(f); - EXPECT_EQ(x, StreamRoundTrip<int64_t>(x)); - } - } -} - -TEST(IOStreamStateSaver, RoundTripDoubles) { - static_assert( - stream_precision_helper<double>::kPrecision >= 17, - "stream_precision_helper<double>::kPrecision should be at least 17"); - - const double kValues[] = { - 1, - std::nextafter(1.0, 0.0), // 1 - epsilon - std::nextafter(1.0, 2.0), // 1 + epsilon - - 1.0e+1, - 1.0e-1, - 1.0e+2, - 1.0e-2, - 1.0e+10, - 1.0e-10, - - 0.00000051110000111311111111, - -0.00000051110000111211111111, - - 1.234678912345678912345e+6, - 1.234678912345678912345e-6, - 1.234678912345678912345e+30, - 1.234678912345678912345e-30, - 1.234678912345678912345e+38, - 1.0234678912345678912345e-38, - - 1.0e+100, - 1.0e-100, - 1.234678912345678912345e+308, - 1.0234678912345678912345e-308, - 2.22507385850720138e-308, - - // Boundary cases. - std::numeric_limits<double>::max(), - std::numeric_limits<double>::lowest(), - std::numeric_limits<double>::epsilon(), - std::nextafter(std::numeric_limits<double>::min(), - 1.0), // min + epsilon - std::numeric_limits<double>::min(), // smallest normal - // There are some errors dealing with denorms on apple platforms. - std::numeric_limits<double>::denorm_min(), // smallest denorm - std::numeric_limits<double>::min() / 2, - std::nextafter(std::numeric_limits<double>::min(), - 0.0), // denorm_max - std::nextafter(std::numeric_limits<double>::denorm_min(), 1.0f), - }; - - for (const double d : kValues) { - EXPECT_EQ(d, StreamRoundTrip<double>(d)); - EXPECT_EQ(-d, StreamRoundTrip<double>(-d)); - - // Avoid undefined behavior (overflow/underflow). - if (d <= std::numeric_limits<float>::max() && - d >= std::numeric_limits<float>::lowest()) { - float f = static_cast<float>(d); - EXPECT_EQ(f, StreamRoundTrip<float>(f)); - } - - // Avoid undefined behavior (overflow/underflow). - if (d <= static_cast<double>(std::numeric_limits<int64_t>::max()) && - d >= static_cast<double>(std::numeric_limits<int64_t>::lowest())) { - int64_t x = static_cast<int64_t>(d); - EXPECT_EQ(x, StreamRoundTrip<int64_t>(x)); - } - } -} - -#if !defined(__EMSCRIPTEN__) -TEST(IOStreamStateSaver, RoundTripLongDoubles) { - // Technically, C++ only guarantees that long double is at least as large as a - // double. Practically it varies from 64-bits to 128-bits. - // - // So it is best to consider long double a best-effort extended precision - // type. - - static_assert( - stream_precision_helper<long double>::kPrecision >= 36, - "stream_precision_helper<long double>::kPrecision should be at least 36"); - - using real_type = long double; - const real_type kValues[] = { - 1, - std::nextafter(1.0, 0.0), // 1 - epsilon - std::nextafter(1.0, 2.0), // 1 + epsilon - - 1.0e+1, - 1.0e-1, - 1.0e+2, - 1.0e-2, - 1.0e+10, - 1.0e-10, - - 0.00000051110000111311111111, - -0.00000051110000111211111111, - - 1.2346789123456789123456789123456789e+6, - 1.2346789123456789123456789123456789e-6, - 1.2346789123456789123456789123456789e+30, - 1.2346789123456789123456789123456789e-30, - 1.2346789123456789123456789123456789e+38, - 1.2346789123456789123456789123456789e-38, - 1.2346789123456789123456789123456789e+308, - 1.2346789123456789123456789123456789e-308, - - 1.0e+100, - 1.0e-100, - 1.234678912345678912345e+308, - 1.0234678912345678912345e-308, - - // Boundary cases. - std::numeric_limits<real_type>::max(), - std::numeric_limits<real_type>::lowest(), - std::numeric_limits<real_type>::epsilon(), - std::nextafter(std::numeric_limits<real_type>::min(), - real_type(1)), // min + epsilon - std::numeric_limits<real_type>::min(), // smallest normal - // There are some errors dealing with denorms on apple platforms. - std::numeric_limits<real_type>::denorm_min(), // smallest denorm - std::numeric_limits<real_type>::min() / 2, - std::nextafter(std::numeric_limits<real_type>::min(), - 0.0), // denorm_max - std::nextafter(std::numeric_limits<real_type>::denorm_min(), 1.0f), - }; - - int index = -1; - for (const long double dd : kValues) { - index++; - EXPECT_EQ(dd, StreamRoundTrip<real_type>(dd)) << index; - EXPECT_EQ(-dd, StreamRoundTrip<real_type>(-dd)) << index; - - // Avoid undefined behavior (overflow/underflow). - if (dd <= std::numeric_limits<double>::max() && - dd >= std::numeric_limits<double>::lowest()) { - double d = static_cast<double>(dd); - EXPECT_EQ(d, StreamRoundTrip<double>(d)); - } - - // Avoid undefined behavior (overflow/underflow). - if (dd <= std::numeric_limits<int64_t>::max() && - dd >= std::numeric_limits<int64_t>::lowest()) { - int64_t x = static_cast<int64_t>(dd); - EXPECT_EQ(x, StreamRoundTrip<int64_t>(x)); - } - } -} -#endif // !defined(__EMSCRIPTEN__) - -TEST(StrToDTest, DoubleMin) { - const char kV[] = "2.22507385850720138e-308"; - char* end; - double x = std::strtod(kV, &end); - EXPECT_EQ(std::numeric_limits<double>::min(), x); - // errno may equal ERANGE. -} - -TEST(StrToDTest, DoubleDenormMin) { - const char kV[] = "4.94065645841246544e-324"; - char* end; - double x = std::strtod(kV, &end); - EXPECT_EQ(std::numeric_limits<double>::denorm_min(), x); - // errno may equal ERANGE. -} - -} // namespace |