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// Copyright 2018 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/container/internal/container_memory.h"
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#include <cstdint>
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#include <tuple>
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#include <utility>
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#include "gmock/gmock.h"
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#include "gtest/gtest.h"
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#include "absl/strings/string_view.h"
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namespace absl {
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ABSL_NAMESPACE_BEGIN
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namespace container_internal {
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namespace {
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using ::testing::Pair;
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TEST(Memory, AlignmentLargerThanBase) {
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std::allocator<int8_t> alloc;
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void* mem = Allocate<2>(&alloc, 3);
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EXPECT_EQ(0, reinterpret_cast<uintptr_t>(mem) % 2);
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memcpy(mem, "abc", 3);
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Deallocate<2>(&alloc, mem, 3);
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}
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TEST(Memory, AlignmentSmallerThanBase) {
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std::allocator<int64_t> alloc;
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void* mem = Allocate<2>(&alloc, 3);
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EXPECT_EQ(0, reinterpret_cast<uintptr_t>(mem) % 2);
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memcpy(mem, "abc", 3);
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Deallocate<2>(&alloc, mem, 3);
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}
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class Fixture : public ::testing::Test {
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using Alloc = std::allocator<std::string>;
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public:
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Fixture() { ptr_ = std::allocator_traits<Alloc>::allocate(*alloc(), 1); }
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~Fixture() override {
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std::allocator_traits<Alloc>::destroy(*alloc(), ptr_);
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std::allocator_traits<Alloc>::deallocate(*alloc(), ptr_, 1);
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}
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std::string* ptr() { return ptr_; }
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Alloc* alloc() { return &alloc_; }
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private:
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Alloc alloc_;
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std::string* ptr_;
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};
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TEST_F(Fixture, ConstructNoArgs) {
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ConstructFromTuple(alloc(), ptr(), std::forward_as_tuple());
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EXPECT_EQ(*ptr(), "");
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}
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TEST_F(Fixture, ConstructOneArg) {
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ConstructFromTuple(alloc(), ptr(), std::forward_as_tuple("abcde"));
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EXPECT_EQ(*ptr(), "abcde");
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}
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TEST_F(Fixture, ConstructTwoArg) {
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ConstructFromTuple(alloc(), ptr(), std::forward_as_tuple(5, 'a'));
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EXPECT_EQ(*ptr(), "aaaaa");
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}
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TEST(PairArgs, NoArgs) {
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EXPECT_THAT(PairArgs(),
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Pair(std::forward_as_tuple(), std::forward_as_tuple()));
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}
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TEST(PairArgs, TwoArgs) {
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EXPECT_EQ(
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std::make_pair(std::forward_as_tuple(1), std::forward_as_tuple('A')),
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PairArgs(1, 'A'));
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}
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TEST(PairArgs, Pair) {
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EXPECT_EQ(
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std::make_pair(std::forward_as_tuple(1), std::forward_as_tuple('A')),
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PairArgs(std::make_pair(1, 'A')));
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}
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TEST(PairArgs, Piecewise) {
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EXPECT_EQ(
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std::make_pair(std::forward_as_tuple(1), std::forward_as_tuple('A')),
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PairArgs(std::piecewise_construct, std::forward_as_tuple(1),
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std::forward_as_tuple('A')));
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}
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TEST(WithConstructed, Simple) {
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EXPECT_EQ(1, WithConstructed<absl::string_view>(
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std::make_tuple(std::string("a")),
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[](absl::string_view str) { return str.size(); }));
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}
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template <class F, class Arg>
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decltype(DecomposeValue(std::declval<F>(), std::declval<Arg>()))
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DecomposeValueImpl(int, F&& f, Arg&& arg) {
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return DecomposeValue(std::forward<F>(f), std::forward<Arg>(arg));
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}
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template <class F, class Arg>
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const char* DecomposeValueImpl(char, F&& f, Arg&& arg) {
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return "not decomposable";
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}
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template <class F, class Arg>
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decltype(DecomposeValueImpl(0, std::declval<F>(), std::declval<Arg>()))
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TryDecomposeValue(F&& f, Arg&& arg) {
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return DecomposeValueImpl(0, std::forward<F>(f), std::forward<Arg>(arg));
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}
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TEST(DecomposeValue, Decomposable) {
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auto f = [](const int& x, int&& y) {
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EXPECT_EQ(&x, &y);
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EXPECT_EQ(42, x);
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return 'A';
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};
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EXPECT_EQ('A', TryDecomposeValue(f, 42));
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}
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TEST(DecomposeValue, NotDecomposable) {
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auto f = [](void*) {
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ADD_FAILURE() << "Must not be called";
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return 'A';
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};
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EXPECT_STREQ("not decomposable", TryDecomposeValue(f, 42));
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}
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template <class F, class... Args>
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decltype(DecomposePair(std::declval<F>(), std::declval<Args>()...))
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DecomposePairImpl(int, F&& f, Args&&... args) {
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return DecomposePair(std::forward<F>(f), std::forward<Args>(args)...);
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}
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template <class F, class... Args>
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const char* DecomposePairImpl(char, F&& f, Args&&... args) {
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return "not decomposable";
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}
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template <class F, class... Args>
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decltype(DecomposePairImpl(0, std::declval<F>(), std::declval<Args>()...))
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TryDecomposePair(F&& f, Args&&... args) {
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return DecomposePairImpl(0, std::forward<F>(f), std::forward<Args>(args)...);
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}
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TEST(DecomposePair, Decomposable) {
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auto f = [](const int& x, std::piecewise_construct_t, std::tuple<int&&> k,
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std::tuple<double>&& v) {
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EXPECT_EQ(&x, &std::get<0>(k));
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EXPECT_EQ(42, x);
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EXPECT_EQ(0.5, std::get<0>(v));
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return 'A';
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};
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EXPECT_EQ('A', TryDecomposePair(f, 42, 0.5));
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EXPECT_EQ('A', TryDecomposePair(f, std::make_pair(42, 0.5)));
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EXPECT_EQ('A', TryDecomposePair(f, std::piecewise_construct,
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std::make_tuple(42), std::make_tuple(0.5)));
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}
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TEST(DecomposePair, NotDecomposable) {
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auto f = [](...) {
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ADD_FAILURE() << "Must not be called";
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return 'A';
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};
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EXPECT_STREQ("not decomposable",
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TryDecomposePair(f));
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EXPECT_STREQ("not decomposable",
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TryDecomposePair(f, std::piecewise_construct, std::make_tuple(),
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std::make_tuple(0.5)));
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}
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} // namespace
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} // namespace container_internal
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ABSL_NAMESPACE_END
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} // namespace absl
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