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Diffstat (limited to 'third_party/abseil_cpp/absl/utility/utility_test.cc')
| -rw-r--r-- | third_party/abseil_cpp/absl/utility/utility_test.cc | 376 |
1 files changed, 0 insertions, 376 deletions
diff --git a/third_party/abseil_cpp/absl/utility/utility_test.cc b/third_party/abseil_cpp/absl/utility/utility_test.cc deleted file mode 100644 index f044ad644a..0000000000 --- a/third_party/abseil_cpp/absl/utility/utility_test.cc +++ /dev/null @@ -1,376 +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/utility/utility.h" - -#include <sstream> -#include <string> -#include <tuple> -#include <type_traits> -#include <vector> - -#include "gmock/gmock.h" -#include "gtest/gtest.h" -#include "absl/base/attributes.h" -#include "absl/memory/memory.h" -#include "absl/strings/str_cat.h" - -namespace { - -#ifdef _MSC_VER -// Warnings for unused variables in this test are false positives. On other -// platforms, they are suppressed by ABSL_ATTRIBUTE_UNUSED, but that doesn't -// work on MSVC. -// Both the unused variables and the name length warnings are due to calls -// to absl::make_index_sequence with very large values, creating very long type -// names. The resulting warnings are so long they make build output unreadable. -#pragma warning( push ) -#pragma warning( disable : 4503 ) // decorated name length exceeded -#pragma warning( disable : 4101 ) // unreferenced local variable -#endif // _MSC_VER - -using ::testing::ElementsAre; -using ::testing::Pointee; -using ::testing::StaticAssertTypeEq; - -TEST(IntegerSequenceTest, ValueType) { - StaticAssertTypeEq<int, absl::integer_sequence<int>::value_type>(); - StaticAssertTypeEq<char, absl::integer_sequence<char>::value_type>(); -} - -TEST(IntegerSequenceTest, Size) { - EXPECT_EQ(0, (absl::integer_sequence<int>::size())); - EXPECT_EQ(1, (absl::integer_sequence<int, 0>::size())); - EXPECT_EQ(1, (absl::integer_sequence<int, 1>::size())); - EXPECT_EQ(2, (absl::integer_sequence<int, 1, 2>::size())); - EXPECT_EQ(3, (absl::integer_sequence<int, 0, 1, 2>::size())); - EXPECT_EQ(3, (absl::integer_sequence<int, -123, 123, 456>::size())); - constexpr size_t sz = absl::integer_sequence<int, 0, 1>::size(); - EXPECT_EQ(2, sz); -} - -TEST(IntegerSequenceTest, MakeIndexSequence) { - StaticAssertTypeEq<absl::index_sequence<>, absl::make_index_sequence<0>>(); - StaticAssertTypeEq<absl::index_sequence<0>, absl::make_index_sequence<1>>(); - StaticAssertTypeEq<absl::index_sequence<0, 1>, - absl::make_index_sequence<2>>(); - StaticAssertTypeEq<absl::index_sequence<0, 1, 2>, - absl::make_index_sequence<3>>(); -} - -TEST(IntegerSequenceTest, MakeIntegerSequence) { - StaticAssertTypeEq<absl::integer_sequence<int>, - absl::make_integer_sequence<int, 0>>(); - StaticAssertTypeEq<absl::integer_sequence<int, 0>, - absl::make_integer_sequence<int, 1>>(); - StaticAssertTypeEq<absl::integer_sequence<int, 0, 1>, - absl::make_integer_sequence<int, 2>>(); - StaticAssertTypeEq<absl::integer_sequence<int, 0, 1, 2>, - absl::make_integer_sequence<int, 3>>(); -} - -template <typename... Ts> -class Counter {}; - -template <size_t... Is> -void CountAll(absl::index_sequence<Is...>) { - // We only need an alias here, but instantiate a variable to silence warnings - // for unused typedefs in some compilers. - ABSL_ATTRIBUTE_UNUSED Counter<absl::make_index_sequence<Is>...> seq; -} - -// This test verifies that absl::make_index_sequence can handle large arguments -// without blowing up template instantiation stack, going OOM or taking forever -// to compile (there is hard 15 minutes limit imposed by forge). -TEST(IntegerSequenceTest, MakeIndexSequencePerformance) { - // O(log N) template instantiations. - // We only need an alias here, but instantiate a variable to silence warnings - // for unused typedefs in some compilers. - ABSL_ATTRIBUTE_UNUSED absl::make_index_sequence<(1 << 16) - 1> seq; - // O(N) template instantiations. - CountAll(absl::make_index_sequence<(1 << 8) - 1>()); -} - -template <typename F, typename Tup, size_t... Is> -auto ApplyFromTupleImpl(F f, const Tup& tup, absl::index_sequence<Is...>) - -> decltype(f(std::get<Is>(tup)...)) { - return f(std::get<Is>(tup)...); -} - -template <typename Tup> -using TupIdxSeq = absl::make_index_sequence<std::tuple_size<Tup>::value>; - -template <typename F, typename Tup> -auto ApplyFromTuple(F f, const Tup& tup) - -> decltype(ApplyFromTupleImpl(f, tup, TupIdxSeq<Tup>{})) { - return ApplyFromTupleImpl(f, tup, TupIdxSeq<Tup>{}); -} - -template <typename T> -std::string Fmt(const T& x) { - std::ostringstream os; - os << x; - return os.str(); -} - -struct PoorStrCat { - template <typename... Args> - std::string operator()(const Args&... args) const { - std::string r; - for (const auto& e : {Fmt(args)...}) r += e; - return r; - } -}; - -template <typename Tup, size_t... Is> -std::vector<std::string> TupStringVecImpl(const Tup& tup, - absl::index_sequence<Is...>) { - return {Fmt(std::get<Is>(tup))...}; -} - -template <typename... Ts> -std::vector<std::string> TupStringVec(const std::tuple<Ts...>& tup) { - return TupStringVecImpl(tup, absl::index_sequence_for<Ts...>()); -} - -TEST(MakeIndexSequenceTest, ApplyFromTupleExample) { - PoorStrCat f{}; - EXPECT_EQ("12abc3.14", f(12, "abc", 3.14)); - EXPECT_EQ("12abc3.14", ApplyFromTuple(f, std::make_tuple(12, "abc", 3.14))); -} - -TEST(IndexSequenceForTest, Basic) { - StaticAssertTypeEq<absl::index_sequence<>, absl::index_sequence_for<>>(); - StaticAssertTypeEq<absl::index_sequence<0>, absl::index_sequence_for<int>>(); - StaticAssertTypeEq<absl::index_sequence<0, 1, 2, 3>, - absl::index_sequence_for<int, void, char, int>>(); -} - -TEST(IndexSequenceForTest, Example) { - EXPECT_THAT(TupStringVec(std::make_tuple(12, "abc", 3.14)), - ElementsAre("12", "abc", "3.14")); -} - -int Function(int a, int b) { return a - b; } - -int Sink(std::unique_ptr<int> p) { return *p; } - -std::unique_ptr<int> Factory(int n) { return absl::make_unique<int>(n); } - -void NoOp() {} - -struct ConstFunctor { - int operator()(int a, int b) const { return a - b; } -}; - -struct MutableFunctor { - int operator()(int a, int b) { return a - b; } -}; - -struct EphemeralFunctor { - EphemeralFunctor() {} - EphemeralFunctor(const EphemeralFunctor&) {} - EphemeralFunctor(EphemeralFunctor&&) {} - int operator()(int a, int b) && { return a - b; } -}; - -struct OverloadedFunctor { - OverloadedFunctor() {} - OverloadedFunctor(const OverloadedFunctor&) {} - OverloadedFunctor(OverloadedFunctor&&) {} - template <typename... Args> - std::string operator()(const Args&... args) & { - return absl::StrCat("&", args...); - } - template <typename... Args> - std::string operator()(const Args&... args) const& { - return absl::StrCat("const&", args...); - } - template <typename... Args> - std::string operator()(const Args&... args) && { - return absl::StrCat("&&", args...); - } -}; - -struct Class { - int Method(int a, int b) { return a - b; } - int ConstMethod(int a, int b) const { return a - b; } - - int member; -}; - -struct FlipFlop { - int ConstMethod() const { return member; } - FlipFlop operator*() const { return {-member}; } - - int member; -}; - -TEST(ApplyTest, Function) { - EXPECT_EQ(1, absl::apply(Function, std::make_tuple(3, 2))); - EXPECT_EQ(1, absl::apply(&Function, std::make_tuple(3, 2))); -} - -TEST(ApplyTest, NonCopyableArgument) { - EXPECT_EQ(42, absl::apply(Sink, std::make_tuple(absl::make_unique<int>(42)))); -} - -TEST(ApplyTest, NonCopyableResult) { - EXPECT_THAT(absl::apply(Factory, std::make_tuple(42)), - ::testing::Pointee(42)); -} - -TEST(ApplyTest, VoidResult) { absl::apply(NoOp, std::tuple<>()); } - -TEST(ApplyTest, ConstFunctor) { - EXPECT_EQ(1, absl::apply(ConstFunctor(), std::make_tuple(3, 2))); -} - -TEST(ApplyTest, MutableFunctor) { - MutableFunctor f; - EXPECT_EQ(1, absl::apply(f, std::make_tuple(3, 2))); - EXPECT_EQ(1, absl::apply(MutableFunctor(), std::make_tuple(3, 2))); -} -TEST(ApplyTest, EphemeralFunctor) { - EphemeralFunctor f; - EXPECT_EQ(1, absl::apply(std::move(f), std::make_tuple(3, 2))); - EXPECT_EQ(1, absl::apply(EphemeralFunctor(), std::make_tuple(3, 2))); -} -TEST(ApplyTest, OverloadedFunctor) { - OverloadedFunctor f; - const OverloadedFunctor& cf = f; - - EXPECT_EQ("&", absl::apply(f, std::tuple<>{})); - EXPECT_EQ("& 42", absl::apply(f, std::make_tuple(" 42"))); - - EXPECT_EQ("const&", absl::apply(cf, std::tuple<>{})); - EXPECT_EQ("const& 42", absl::apply(cf, std::make_tuple(" 42"))); - - EXPECT_EQ("&&", absl::apply(std::move(f), std::tuple<>{})); - OverloadedFunctor f2; - EXPECT_EQ("&& 42", absl::apply(std::move(f2), std::make_tuple(" 42"))); -} - -TEST(ApplyTest, ReferenceWrapper) { - ConstFunctor cf; - MutableFunctor mf; - EXPECT_EQ(1, absl::apply(std::cref(cf), std::make_tuple(3, 2))); - EXPECT_EQ(1, absl::apply(std::ref(cf), std::make_tuple(3, 2))); - EXPECT_EQ(1, absl::apply(std::ref(mf), std::make_tuple(3, 2))); -} - -TEST(ApplyTest, MemberFunction) { - std::unique_ptr<Class> p(new Class); - std::unique_ptr<const Class> cp(new Class); - EXPECT_EQ( - 1, absl::apply(&Class::Method, - std::tuple<std::unique_ptr<Class>&, int, int>(p, 3, 2))); - EXPECT_EQ(1, absl::apply(&Class::Method, - std::tuple<Class*, int, int>(p.get(), 3, 2))); - EXPECT_EQ( - 1, absl::apply(&Class::Method, std::tuple<Class&, int, int>(*p, 3, 2))); - - EXPECT_EQ( - 1, absl::apply(&Class::ConstMethod, - std::tuple<std::unique_ptr<Class>&, int, int>(p, 3, 2))); - EXPECT_EQ(1, absl::apply(&Class::ConstMethod, - std::tuple<Class*, int, int>(p.get(), 3, 2))); - EXPECT_EQ(1, absl::apply(&Class::ConstMethod, - std::tuple<Class&, int, int>(*p, 3, 2))); - - EXPECT_EQ(1, absl::apply(&Class::ConstMethod, - std::tuple<std::unique_ptr<const Class>&, int, int>( - cp, 3, 2))); - EXPECT_EQ(1, absl::apply(&Class::ConstMethod, - std::tuple<const Class*, int, int>(cp.get(), 3, 2))); - EXPECT_EQ(1, absl::apply(&Class::ConstMethod, - std::tuple<const Class&, int, int>(*cp, 3, 2))); - - EXPECT_EQ(1, absl::apply(&Class::Method, - std::make_tuple(absl::make_unique<Class>(), 3, 2))); - EXPECT_EQ(1, absl::apply(&Class::ConstMethod, - std::make_tuple(absl::make_unique<Class>(), 3, 2))); - EXPECT_EQ( - 1, absl::apply(&Class::ConstMethod, - std::make_tuple(absl::make_unique<const Class>(), 3, 2))); -} - -TEST(ApplyTest, DataMember) { - std::unique_ptr<Class> p(new Class{42}); - std::unique_ptr<const Class> cp(new Class{42}); - EXPECT_EQ( - 42, absl::apply(&Class::member, std::tuple<std::unique_ptr<Class>&>(p))); - EXPECT_EQ(42, absl::apply(&Class::member, std::tuple<Class&>(*p))); - EXPECT_EQ(42, absl::apply(&Class::member, std::tuple<Class*>(p.get()))); - - absl::apply(&Class::member, std::tuple<std::unique_ptr<Class>&>(p)) = 42; - absl::apply(&Class::member, std::tuple<Class*>(p.get())) = 42; - absl::apply(&Class::member, std::tuple<Class&>(*p)) = 42; - - EXPECT_EQ(42, absl::apply(&Class::member, - std::tuple<std::unique_ptr<const Class>&>(cp))); - EXPECT_EQ(42, absl::apply(&Class::member, std::tuple<const Class&>(*cp))); - EXPECT_EQ(42, - absl::apply(&Class::member, std::tuple<const Class*>(cp.get()))); -} - -TEST(ApplyTest, FlipFlop) { - FlipFlop obj = {42}; - // This call could resolve to (obj.*&FlipFlop::ConstMethod)() or - // ((*obj).*&FlipFlop::ConstMethod)(). We verify that it's the former. - EXPECT_EQ(42, absl::apply(&FlipFlop::ConstMethod, std::make_tuple(obj))); - EXPECT_EQ(42, absl::apply(&FlipFlop::member, std::make_tuple(obj))); -} - -TEST(ExchangeTest, MoveOnly) { - auto a = Factory(1); - EXPECT_EQ(1, *a); - auto b = absl::exchange(a, Factory(2)); - EXPECT_EQ(2, *a); - EXPECT_EQ(1, *b); -} - -TEST(MakeFromTupleTest, String) { - EXPECT_EQ( - absl::make_from_tuple<std::string>(std::make_tuple("hello world", 5)), - "hello"); -} - -TEST(MakeFromTupleTest, MoveOnlyParameter) { - struct S { - S(std::unique_ptr<int> n, std::unique_ptr<int> m) : value(*n + *m) {} - int value = 0; - }; - auto tup = - std::make_tuple(absl::make_unique<int>(3), absl::make_unique<int>(4)); - auto s = absl::make_from_tuple<S>(std::move(tup)); - EXPECT_EQ(s.value, 7); -} - -TEST(MakeFromTupleTest, NoParameters) { - struct S { - S() : value(1) {} - int value = 2; - }; - EXPECT_EQ(absl::make_from_tuple<S>(std::make_tuple()).value, 1); -} - -TEST(MakeFromTupleTest, Pair) { - EXPECT_EQ( - (absl::make_from_tuple<std::pair<bool, int>>(std::make_tuple(true, 17))), - std::make_pair(true, 17)); -} - -} // namespace - |