From 4132ce25956a91e1224e0f205b7f8c326304a995 Mon Sep 17 00:00:00 2001 From: Abseil Team Date: Fri, 5 Jan 2018 07:54:33 -0800 Subject: Changes imported from Abseil "staging" branch: - 0a519d9a4507158267cc515e0c7c83959d94fc78 Fix missing header include when compiling with _GLIBCXX_D... by Alex Strelnikov - d089af70781d92af9a5de2d84c417ddf2c87689a Internal change by Gennadiy Rozental - 0d3afc89d3907923ede964d58c6bcca579e8ad65 Test absl::any for exception safety. This test is tempor... by Jon Cohen - 29af424b8a3174a7b3e657e478aa30a8a425aee2 Tweak the ABSL type trait library and expand its tests. by Abseil Team - 99ab42b2ebbe466cc3730fb6b16b5fad848f95af Rollback GLIBCXX_DEBUG fix due to internal breakage. by Alex Strelnikov - 1a5bcb93ee16d4dd2170254e54c4b62b38fbf17b Internal change. by Abseil Team - 46de7d09c7d4aef5b7b5389ce9b4f96b654aac02 absl::string_view::rfind: doc fix. by Abseil Team - edda4c7ddd2d76fbb5b3fd5226b95082083c57d9 Fix string_view_test with c++17/clang/libc++ to address by Xiaoyi Zhang GitOrigin-RevId: 0a519d9a4507158267cc515e0c7c83959d94fc78 Change-Id: Ie27de1be3e79bba011f05e924d34e8fcc62d8de5 --- absl/types/any_exception_safety_test.cc | 201 ++++++++++++++++++++++++++++++++ 1 file changed, 201 insertions(+) create mode 100644 absl/types/any_exception_safety_test.cc (limited to 'absl/types/any_exception_safety_test.cc') diff --git a/absl/types/any_exception_safety_test.cc b/absl/types/any_exception_safety_test.cc new file mode 100644 index 000000000000..eadba3080437 --- /dev/null +++ b/absl/types/any_exception_safety_test.cc @@ -0,0 +1,201 @@ +// 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 +// +// http://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/types/any.h" + +#include +#include + +#include "gtest/gtest.h" +#include "absl/base/internal/exception_safety_testing.h" + +using Thrower = absl::ThrowingValue<>; +using ThrowerList = std::initializer_list; +using ThrowerVec = std::vector; +using ThrowingAlloc = absl::ThrowingAllocator; +using ThrowingThrowerVec = std::vector; + +namespace absl { + +testing::AssertionResult AbslCheckInvariants(absl::any* a, + InternalAbslNamespaceFinder) { + using testing::AssertionFailure; + using testing::AssertionSuccess; + + if (a->has_value()) { + if (a->type() == typeid(void)) { + return AssertionFailure() + << "A non-empty any should not have type `void`"; + } + } else { + if (a->type() != typeid(void)) { + return AssertionFailure() + << "An empty any should have type void, but has type " + << a->type().name(); + } + } + + // Make sure that reset() changes any to a valid state. + a->reset(); + if (a->has_value()) { + return AssertionFailure() << "A reset `any` should be valueless"; + } + if (a->type() != typeid(void)) { + return AssertionFailure() << "A reset `any` should have type() of `void`, " + "but instead has type " + << a->type().name(); + } + try { + auto unused = absl::any_cast(*a); + static_cast(unused); + return AssertionFailure() + << "A reset `any` should not be able to be any_cast"; + } catch (absl::bad_any_cast) { + } catch (...) { + return AssertionFailure() + << "Unexpected exception thrown from absl::any_cast"; + } + return AssertionSuccess(); +} + +} // namespace absl + +namespace { + +class AnyExceptionSafety : public ::testing::Test { + private: + absl::AllocInspector inspector_; +}; + +testing::AssertionResult AnyIsEmpty(absl::any* a) { + if (!a->has_value()) return testing::AssertionSuccess(); + return testing::AssertionFailure() + << "a should be empty, but instead has value " + << absl::any_cast(*a).Get(); +} + +TEST_F(AnyExceptionSafety, Ctors) { + Thrower val(1); + auto with_val = absl::TestThrowingCtor(val); + auto copy = absl::TestThrowingCtor(with_val); + auto in_place = + absl::TestThrowingCtor(absl::in_place_type_t(), 1); + auto in_place_list = absl::TestThrowingCtor( + absl::in_place_type_t(), ThrowerList{val}); + auto in_place_list_again = + absl::TestThrowingCtor, + ThrowerList, ThrowingAlloc>( + absl::in_place_type_t(), {val}, ThrowingAlloc()); +} + +struct OneFactory { + std::unique_ptr operator()() const { + return absl::make_unique(absl::in_place_type_t(), 1, + absl::no_throw_ctor); + } +}; + +struct EmptyFactory { + std::unique_ptr operator()() const { + return absl::make_unique(); + } +}; + +TEST_F(AnyExceptionSafety, Assignment) { + auto thrower_comp = [](const absl::any& l, const absl::any& r) { + return absl::any_cast(l) == absl::any_cast(r); + }; + + OneFactory one_factory; + + absl::ThrowingValue + moveable_val(2); + Thrower val(2); + absl::any any_val(val); + + EXPECT_TRUE(absl::TestExceptionSafety( + one_factory, [&any_val](absl::any* ap) { *ap = any_val; }, + absl::StrongGuarantee(one_factory, thrower_comp))); + + EXPECT_TRUE(absl::TestExceptionSafety( + one_factory, [&val](absl::any* ap) { *ap = val; }, + absl::StrongGuarantee(one_factory, thrower_comp))); + + EXPECT_TRUE(absl::TestExceptionSafety( + one_factory, [&val](absl::any* ap) { *ap = std::move(val); }, + absl::StrongGuarantee(one_factory, thrower_comp))); + + EXPECT_TRUE(absl::TestExceptionSafety( + one_factory, + [&moveable_val](absl::any* ap) { *ap = std::move(moveable_val); }, + absl::StrongGuarantee(one_factory, thrower_comp))); + + EmptyFactory empty_factory; + auto empty_comp = [](const absl::any& l, const absl::any& r) { + return !(l.has_value() || r.has_value()); + }; + + EXPECT_TRUE(absl::TestExceptionSafety( + empty_factory, [&any_val](absl::any* ap) { *ap = any_val; }, + absl::StrongGuarantee(empty_factory, empty_comp))); + + EXPECT_TRUE(absl::TestExceptionSafety( + empty_factory, [&val](absl::any* ap) { *ap = val; }, + absl::StrongGuarantee(empty_factory, empty_comp))); + + EXPECT_TRUE(absl::TestExceptionSafety( + empty_factory, [&val](absl::any* ap) { *ap = std::move(val); }, + absl::StrongGuarantee(empty_factory, empty_comp))); +} +// libstdc++ std::any fails this test +#if !defined(ABSL_HAVE_STD_ANY) +TEST_F(AnyExceptionSafety, Emplace) { + OneFactory one_factory; + + EXPECT_TRUE(absl::TestExceptionSafety( + one_factory, [](absl::any* ap) { ap->emplace(2); }, AnyIsEmpty)); + + EXPECT_TRUE(absl::TestExceptionSafety( + one_factory, + [](absl::any* ap) { + ap->emplace>(2); + }, + AnyIsEmpty)); + + EXPECT_TRUE(absl::TestExceptionSafety(one_factory, + [](absl::any* ap) { + std::initializer_list il{ + Thrower(2, absl::no_throw_ctor)}; + ap->emplace(il); + }, + AnyIsEmpty)); + + EmptyFactory empty_factory; + EXPECT_TRUE(absl::TestExceptionSafety( + empty_factory, [](absl::any* ap) { ap->emplace(2); }, + AnyIsEmpty)); + + EXPECT_TRUE(absl::TestExceptionSafety(empty_factory, + [](absl::any* ap) { + std::initializer_list il{ + Thrower(2, absl::no_throw_ctor)}; + ap->emplace(il); + }, + AnyIsEmpty)); +} +#endif // ABSL_HAVE_STD_ANY + +} // namespace -- cgit 1.4.1