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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
#include <gtest/gtest.h>
#include <stddef.h>
#include <algorithm>
#include <string>
#include <utility>
#include <vector>
#include "opentelemetry/nostd/shared_ptr.h"
using opentelemetry::nostd::shared_ptr;
class A
{
public:
explicit A(bool &destructed) noexcept : destructed_{destructed} { destructed_ = false; }
~A() { destructed_ = true; }
A(const A &) = delete;
A(A &&) = delete;
A &operator=(const A &) = delete;
A &operator=(A &&) = delete;
private:
bool &destructed_;
};
class B
{
public:
int f() const { return 123; }
};
class C
{
public:
virtual ~C() {}
C() = default;
C(const C &) = delete;
C(C &&) = delete;
C &operator=(const C &) = delete;
C &operator=(C &&) = delete;
};
class D : public C
{};
TEST(SharedPtrTest, DefaultConstruction)
{
shared_ptr<int> ptr1;
EXPECT_EQ(ptr1.get(), nullptr);
shared_ptr<int> ptr2{nullptr};
EXPECT_EQ(ptr2.get(), nullptr);
}
TEST(SharedPtrTest, ExplicitConstruction)
{
auto c = new C();
shared_ptr<C> ptr1{c};
EXPECT_EQ(ptr1.get(), c);
auto d = new D();
shared_ptr<C> ptr2{d};
EXPECT_EQ(ptr2.get(), d);
}
TEST(SharedPtrTest, MoveConstruction)
{
auto value = new int{123};
shared_ptr<int> ptr1{value};
shared_ptr<int> ptr2{std::move(ptr1)};
EXPECT_EQ(ptr1.get(), nullptr); // NOLINT
EXPECT_EQ(ptr2.get(), value);
}
TEST(SharedPtrTest, MoveConstructionFromDifferentType)
{
auto value = new int{123};
shared_ptr<int> ptr1{value};
shared_ptr<const int> ptr2{std::move(ptr1)};
EXPECT_EQ(ptr1.get(), nullptr); // NOLINT
EXPECT_EQ(ptr2.get(), value);
}
TEST(SharedPtrTest, MoveConstructionFromStdSharedPtr)
{
auto value = new int{123};
std::shared_ptr<int> ptr1{value};
shared_ptr<int> ptr2{std::move(ptr1)};
EXPECT_EQ(ptr1.get(), nullptr); // NOLINT
EXPECT_EQ(ptr2.get(), value);
}
TEST(SharedPtrTest, Destruction)
{
bool was_destructed;
shared_ptr<A>{new A{was_destructed}}; // NOLINT
EXPECT_TRUE(was_destructed);
}
TEST(SharedPtrTest, Assignment)
{
auto value = new int{123};
shared_ptr<int> ptr1;
ptr1 = shared_ptr<int>(value);
EXPECT_EQ(ptr1.get(), value);
ptr1 = nullptr;
EXPECT_EQ(ptr1.get(), nullptr);
auto value2 = new int{234};
const shared_ptr<int> ptr2 = shared_ptr<int>(value2);
ptr1 = ptr2;
EXPECT_EQ(ptr1.get(), value2);
auto value3 = new int{345};
std::shared_ptr<int> ptr3(value3);
ptr1 = ptr3;
EXPECT_EQ(ptr1.get(), value3);
}
TEST(SharedPtrTest, BoolConversionOpertor)
{
auto value = new int{123};
shared_ptr<int> ptr1{value};
EXPECT_TRUE(ptr1);
EXPECT_FALSE(shared_ptr<int>{});
}
TEST(SharedPtrTest, PointerOperators)
{
auto value = new int{123};
shared_ptr<int> ptr1{value};
EXPECT_EQ(&*ptr1, value);
EXPECT_EQ(shared_ptr<B> { new B } -> f(), 123);
}
TEST(SharedPtrTest, Swap)
{
auto value1 = new int{123};
shared_ptr<int> ptr1{value1};
auto value2 = new int{456};
shared_ptr<int> ptr2{value2};
ptr1.swap(ptr2);
EXPECT_EQ(ptr1.get(), value2);
EXPECT_EQ(ptr2.get(), value1);
}
TEST(SharedPtrTest, Comparison)
{
shared_ptr<int> ptr1{new int{123}};
shared_ptr<int> ptr2{new int{456}};
shared_ptr<int> ptr3{};
EXPECT_EQ(ptr1, ptr1);
EXPECT_NE(ptr1, ptr2);
EXPECT_NE(ptr1, nullptr);
EXPECT_NE(nullptr, ptr1);
EXPECT_EQ(ptr3, nullptr);
EXPECT_EQ(nullptr, ptr3);
}
static void SharedPtrTest_Sort(size_t size = 10)
{
std::vector<shared_ptr<const int>> nums;
for (int i = static_cast<int>(size); i > 0; i--)
{
nums.push_back(shared_ptr<int>(new int(i)));
}
auto nums2 = nums;
std::sort(nums.begin(), nums.end(),
[](const shared_ptr<const int> &a, const shared_ptr<const int> &b) { return *a < *b; });
EXPECT_NE(nums, nums2);
std::reverse(nums2.begin(), nums2.end());
EXPECT_EQ(nums, nums2);
}
TEST(SharedPtrTest, Sort)
{
SharedPtrTest_Sort();
}
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