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// 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/types/any.h"
#include <typeinfo>
#include <vector>
#include "gtest/gtest.h"
#include "absl/base/internal/exception_safety_testing.h"
using Thrower = testing::ThrowingValue<>;
using NoThrowMoveThrower =
testing::ThrowingValue<testing::TypeSpec::kNoThrowMove>;
using ThrowerList = std::initializer_list<Thrower>;
using ThrowerVec = std::vector<Thrower>;
using ThrowingAlloc = testing::ThrowingAllocator<Thrower>;
using ThrowingThrowerVec = std::vector<Thrower, ThrowingAlloc>;
namespace {
testing::AssertionResult AnyInvariants(absl::any* a) {
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<Thrower>(*a);
static_cast<void>(unused);
return AssertionFailure()
<< "A reset `any` should not be able to be any_cast";
} catch (const absl::bad_any_cast&) {
} catch (...) {
return AssertionFailure()
<< "Unexpected exception thrown from absl::any_cast";
}
return AssertionSuccess();
}
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<Thrower>(*a).Get();
}
TEST(AnyExceptionSafety, Ctors) {
Thrower val(1);
testing::TestThrowingCtor<absl::any>(val);
Thrower copy(val);
testing::TestThrowingCtor<absl::any>(copy);
testing::TestThrowingCtor<absl::any>(absl::in_place_type_t<Thrower>(), 1);
testing::TestThrowingCtor<absl::any>(absl::in_place_type_t<ThrowerVec>(),
ThrowerList{val});
testing::TestThrowingCtor<absl::any,
absl::in_place_type_t<ThrowingThrowerVec>,
ThrowerList, ThrowingAlloc>(
absl::in_place_type_t<ThrowingThrowerVec>(), {val}, ThrowingAlloc());
}
TEST(AnyExceptionSafety, Assignment) {
auto original =
absl::any(absl::in_place_type_t<Thrower>(), 1, testing::nothrow_ctor);
auto any_is_strong = [original](absl::any* ap) {
return testing::AssertionResult(ap->has_value() &&
absl::any_cast<Thrower>(original) ==
absl::any_cast<Thrower>(*ap));
};
auto any_strong_tester = testing::MakeExceptionSafetyTester()
.WithInitialValue(original)
.WithContracts(AnyInvariants, any_is_strong);
Thrower val(2);
absl::any any_val(val);
NoThrowMoveThrower mv_val(2);
auto assign_any = [&any_val](absl::any* ap) { *ap = any_val; };
auto assign_val = [&val](absl::any* ap) { *ap = val; };
auto move = [&val](absl::any* ap) { *ap = std::move(val); };
auto move_movable = [&mv_val](absl::any* ap) { *ap = std::move(mv_val); };
EXPECT_TRUE(any_strong_tester.Test(assign_any));
EXPECT_TRUE(any_strong_tester.Test(assign_val));
EXPECT_TRUE(any_strong_tester.Test(move));
EXPECT_TRUE(any_strong_tester.Test(move_movable));
auto empty_any_is_strong = [](absl::any* ap) {
return testing::AssertionResult{!ap->has_value()};
};
auto strong_empty_any_tester =
testing::MakeExceptionSafetyTester()
.WithInitialValue(absl::any{})
.WithContracts(AnyInvariants, empty_any_is_strong);
EXPECT_TRUE(strong_empty_any_tester.Test(assign_any));
EXPECT_TRUE(strong_empty_any_tester.Test(assign_val));
EXPECT_TRUE(strong_empty_any_tester.Test(move));
}
// libstdc++ std::any fails this test
#if !defined(ABSL_HAVE_STD_ANY)
TEST(AnyExceptionSafety, Emplace) {
auto initial_val =
absl::any{absl::in_place_type_t<Thrower>(), 1, testing::nothrow_ctor};
auto one_tester = testing::MakeExceptionSafetyTester()
.WithInitialValue(initial_val)
.WithContracts(AnyInvariants, AnyIsEmpty);
auto emp_thrower = [](absl::any* ap) { ap->emplace<Thrower>(2); };
auto emp_throwervec = [](absl::any* ap) {
std::initializer_list<Thrower> il{Thrower(2, testing::nothrow_ctor)};
ap->emplace<ThrowerVec>(il);
};
auto emp_movethrower = [](absl::any* ap) {
ap->emplace<NoThrowMoveThrower>(2);
};
EXPECT_TRUE(one_tester.Test(emp_thrower));
EXPECT_TRUE(one_tester.Test(emp_throwervec));
EXPECT_TRUE(one_tester.Test(emp_movethrower));
auto empty_tester = one_tester.WithInitialValue(absl::any{});
EXPECT_TRUE(empty_tester.Test(emp_thrower));
EXPECT_TRUE(empty_tester.Test(emp_throwervec));
}
#endif // ABSL_HAVE_STD_ANY
} // namespace
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