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311
TMessagesProj/jni/voip/webrtc/absl/cleanup/cleanup_test.cc
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TMessagesProj/jni/voip/webrtc/absl/cleanup/cleanup_test.cc
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// Copyright 2021 The Abseil Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "absl/cleanup/cleanup.h"
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#include <functional>
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#include <type_traits>
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#include <utility>
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#include "gtest/gtest.h"
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#include "absl/base/config.h"
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#include "absl/utility/utility.h"
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namespace {
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using Tag = absl::cleanup_internal::Tag;
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template <typename Type1, typename Type2>
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constexpr bool IsSame() {
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return (std::is_same<Type1, Type2>::value);
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}
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struct IdentityFactory {
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template <typename Callback>
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static Callback AsCallback(Callback callback) {
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return Callback(std::move(callback));
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}
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};
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// `FunctorClass` is a type used for testing `absl::Cleanup`. It is intended to
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// represent users that make their own move-only callback types outside of
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// `std::function` and lambda literals.
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class FunctorClass {
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using Callback = std::function<void()>;
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public:
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explicit FunctorClass(Callback callback) : callback_(std::move(callback)) {}
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FunctorClass(FunctorClass&& other)
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: callback_(std::exchange(other.callback_, Callback())) {}
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FunctorClass(const FunctorClass&) = delete;
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FunctorClass& operator=(const FunctorClass&) = delete;
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FunctorClass& operator=(FunctorClass&&) = delete;
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void operator()() const& = delete;
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void operator()() && {
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ASSERT_TRUE(callback_);
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callback_();
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callback_ = nullptr;
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}
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private:
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Callback callback_;
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};
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struct FunctorClassFactory {
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template <typename Callback>
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static FunctorClass AsCallback(Callback callback) {
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return FunctorClass(std::move(callback));
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}
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};
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struct StdFunctionFactory {
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template <typename Callback>
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static std::function<void()> AsCallback(Callback callback) {
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return std::function<void()>(std::move(callback));
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}
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};
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using CleanupTestParams =
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::testing::Types<IdentityFactory, FunctorClassFactory, StdFunctionFactory>;
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template <typename>
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struct CleanupTest : public ::testing::Test {};
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TYPED_TEST_SUITE(CleanupTest, CleanupTestParams);
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bool fn_ptr_called = false;
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void FnPtrFunction() { fn_ptr_called = true; }
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TYPED_TEST(CleanupTest, FactoryProducesCorrectType) {
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{
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auto callback = TypeParam::AsCallback([] {});
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auto cleanup = absl::MakeCleanup(std::move(callback));
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static_assert(
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IsSame<absl::Cleanup<Tag, decltype(callback)>, decltype(cleanup)>(),
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"");
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}
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{
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auto cleanup = absl::MakeCleanup(&FnPtrFunction);
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static_assert(IsSame<absl::Cleanup<Tag, void (*)()>, decltype(cleanup)>(),
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"");
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}
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{
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auto cleanup = absl::MakeCleanup(FnPtrFunction);
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static_assert(IsSame<absl::Cleanup<Tag, void (*)()>, decltype(cleanup)>(),
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"");
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}
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}
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#if defined(ABSL_HAVE_CLASS_TEMPLATE_ARGUMENT_DEDUCTION)
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TYPED_TEST(CleanupTest, CTADProducesCorrectType) {
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{
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auto callback = TypeParam::AsCallback([] {});
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absl::Cleanup cleanup = std::move(callback);
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static_assert(
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IsSame<absl::Cleanup<Tag, decltype(callback)>, decltype(cleanup)>(),
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"");
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}
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{
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absl::Cleanup cleanup = &FnPtrFunction;
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static_assert(IsSame<absl::Cleanup<Tag, void (*)()>, decltype(cleanup)>(),
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"");
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}
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{
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absl::Cleanup cleanup = FnPtrFunction;
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static_assert(IsSame<absl::Cleanup<Tag, void (*)()>, decltype(cleanup)>(),
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"");
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}
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}
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TYPED_TEST(CleanupTest, FactoryAndCTADProduceSameType) {
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{
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auto callback = IdentityFactory::AsCallback([] {});
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auto factory_cleanup = absl::MakeCleanup(callback);
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absl::Cleanup deduction_cleanup = callback;
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static_assert(
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IsSame<decltype(factory_cleanup), decltype(deduction_cleanup)>(), "");
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}
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{
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auto factory_cleanup =
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absl::MakeCleanup(FunctorClassFactory::AsCallback([] {}));
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absl::Cleanup deduction_cleanup = FunctorClassFactory::AsCallback([] {});
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static_assert(
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IsSame<decltype(factory_cleanup), decltype(deduction_cleanup)>(), "");
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}
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{
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auto factory_cleanup =
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absl::MakeCleanup(StdFunctionFactory::AsCallback([] {}));
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absl::Cleanup deduction_cleanup = StdFunctionFactory::AsCallback([] {});
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static_assert(
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IsSame<decltype(factory_cleanup), decltype(deduction_cleanup)>(), "");
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}
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{
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auto factory_cleanup = absl::MakeCleanup(&FnPtrFunction);
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absl::Cleanup deduction_cleanup = &FnPtrFunction;
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static_assert(
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IsSame<decltype(factory_cleanup), decltype(deduction_cleanup)>(), "");
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}
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{
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auto factory_cleanup = absl::MakeCleanup(FnPtrFunction);
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absl::Cleanup deduction_cleanup = FnPtrFunction;
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static_assert(
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IsSame<decltype(factory_cleanup), decltype(deduction_cleanup)>(), "");
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}
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}
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#endif // defined(ABSL_HAVE_CLASS_TEMPLATE_ARGUMENT_DEDUCTION)
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TYPED_TEST(CleanupTest, BasicUsage) {
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bool called = false;
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{
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auto cleanup =
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absl::MakeCleanup(TypeParam::AsCallback([&called] { called = true; }));
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EXPECT_FALSE(called); // Constructor shouldn't invoke the callback
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}
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EXPECT_TRUE(called); // Destructor should invoke the callback
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}
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TYPED_TEST(CleanupTest, BasicUsageWithFunctionPointer) {
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fn_ptr_called = false;
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{
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auto cleanup = absl::MakeCleanup(TypeParam::AsCallback(&FnPtrFunction));
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EXPECT_FALSE(fn_ptr_called); // Constructor shouldn't invoke the callback
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}
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EXPECT_TRUE(fn_ptr_called); // Destructor should invoke the callback
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}
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TYPED_TEST(CleanupTest, Cancel) {
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bool called = false;
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{
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auto cleanup =
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absl::MakeCleanup(TypeParam::AsCallback([&called] { called = true; }));
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EXPECT_FALSE(called); // Constructor shouldn't invoke the callback
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std::move(cleanup).Cancel();
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EXPECT_FALSE(called); // Cancel shouldn't invoke the callback
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}
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EXPECT_FALSE(called); // Destructor shouldn't invoke the callback
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}
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TYPED_TEST(CleanupTest, Invoke) {
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bool called = false;
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{
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auto cleanup =
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absl::MakeCleanup(TypeParam::AsCallback([&called] { called = true; }));
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EXPECT_FALSE(called); // Constructor shouldn't invoke the callback
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std::move(cleanup).Invoke();
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EXPECT_TRUE(called); // Invoke should invoke the callback
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called = false; // Reset tracker before destructor runs
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}
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EXPECT_FALSE(called); // Destructor shouldn't invoke the callback
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}
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TYPED_TEST(CleanupTest, Move) {
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bool called = false;
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{
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auto moved_from_cleanup =
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absl::MakeCleanup(TypeParam::AsCallback([&called] { called = true; }));
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EXPECT_FALSE(called); // Constructor shouldn't invoke the callback
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{
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auto moved_to_cleanup = std::move(moved_from_cleanup);
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EXPECT_FALSE(called); // Move shouldn't invoke the callback
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}
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EXPECT_TRUE(called); // Destructor should invoke the callback
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called = false; // Reset tracker before destructor runs
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}
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EXPECT_FALSE(called); // Destructor shouldn't invoke the callback
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}
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int DestructionCount = 0;
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struct DestructionCounter {
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void operator()() {}
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~DestructionCounter() { ++DestructionCount; }
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};
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TYPED_TEST(CleanupTest, DestructorDestroys) {
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{
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auto cleanup =
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absl::MakeCleanup(TypeParam::AsCallback(DestructionCounter()));
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DestructionCount = 0;
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}
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EXPECT_EQ(DestructionCount, 1); // Engaged cleanup destroys
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}
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TYPED_TEST(CleanupTest, CancelDestroys) {
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{
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auto cleanup =
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absl::MakeCleanup(TypeParam::AsCallback(DestructionCounter()));
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DestructionCount = 0;
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std::move(cleanup).Cancel();
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EXPECT_EQ(DestructionCount, 1); // Cancel destroys
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}
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EXPECT_EQ(DestructionCount, 1); // Canceled cleanup does not double destroy
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}
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TYPED_TEST(CleanupTest, InvokeDestroys) {
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{
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auto cleanup =
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absl::MakeCleanup(TypeParam::AsCallback(DestructionCounter()));
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DestructionCount = 0;
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std::move(cleanup).Invoke();
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EXPECT_EQ(DestructionCount, 1); // Invoke destroys
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}
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EXPECT_EQ(DestructionCount, 1); // Invoked cleanup does not double destroy
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}
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} // namespace
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