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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
#include <gtest/gtest.h>
#include <string>
#include <type_traits>
#include <utility>
#include "opentelemetry/nostd/unique_ptr.h"
using opentelemetry::nostd::unique_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; }
};
TEST(UniquePtrTest, DefaultConstruction)
{
unique_ptr<int> ptr1;
EXPECT_EQ(ptr1.get(), nullptr);
unique_ptr<int> ptr2{nullptr};
EXPECT_EQ(ptr2.get(), nullptr);
}
TEST(UniquePtrTest, ExplicitConstruction)
{
auto value = new int{123};
unique_ptr<int> ptr1{value};
EXPECT_EQ(ptr1.get(), value);
auto array = new int[5];
unique_ptr<int[]> ptr2{array};
EXPECT_EQ(ptr2.get(), array);
}
TEST(UniquePtrTest, MoveConstruction)
{
auto value = new int{123};
unique_ptr<int> ptr1{value};
unique_ptr<int> ptr2{std::move(ptr1)};
EXPECT_EQ(ptr1.get(), nullptr); // NOLINT
EXPECT_EQ(ptr2.get(), value);
}
TEST(UniquePtrTest, MoveConstructionFromDifferentType)
{
auto value = new int{123};
unique_ptr<int> ptr1{value};
unique_ptr<const int> ptr2{std::move(ptr1)};
EXPECT_EQ(ptr1.get(), nullptr); // NOLINT
EXPECT_EQ(ptr2.get(), value);
}
TEST(UniquePtrTest, MoveConstructionFromStdUniquePtr)
{
auto value = new int{123};
std::unique_ptr<int> ptr1{value};
unique_ptr<int> ptr2{std::move(ptr1)};
EXPECT_EQ(ptr1.get(), nullptr); // NOLINT
EXPECT_EQ(ptr2.get(), value);
}
TEST(UniquePtrTest, Destruction)
{
bool was_destructed;
unique_ptr<A>{new A{was_destructed}}; // NOLINT
EXPECT_TRUE(was_destructed);
}
TEST(UniquePtrTest, StdUniquePtrConversionOperator)
{
auto value = new int{123};
unique_ptr<int> ptr1{value};
std::unique_ptr<int> ptr2{std::move(ptr1)};
EXPECT_EQ(ptr1.get(), nullptr); // NOLINT
EXPECT_EQ(ptr2.get(), value);
value = new int{456};
ptr1 = unique_ptr<int>{value};
ptr2 = std::move(ptr1);
EXPECT_EQ(ptr1.get(), nullptr); // NOLINT
EXPECT_EQ(ptr2.get(), value);
ptr2 = nullptr;
EXPECT_EQ(ptr2.get(), nullptr);
EXPECT_TRUE((std::is_assignable<std::unique_ptr<int>, unique_ptr<int> &&>::value));
EXPECT_FALSE((std::is_assignable<std::unique_ptr<int>, unique_ptr<int> &>::value));
}
TEST(UniquePtrTest, BoolConversionOpertor)
{
auto value = new int{123};
unique_ptr<int> ptr1{value};
EXPECT_TRUE(ptr1);
EXPECT_FALSE(unique_ptr<int>{});
}
TEST(UniquePtrTest, PointerOperators)
{
auto value = new int{123};
unique_ptr<int> ptr1{value};
EXPECT_EQ(&*ptr1, value);
EXPECT_EQ(unique_ptr<B> { new B } -> f(), 123);
}
TEST(UniquePtrTest, Reset)
{
bool was_destructed1;
unique_ptr<A> ptr{new A{was_destructed1}};
bool was_destructed2 = true;
ptr.reset(new A{was_destructed2});
EXPECT_TRUE(was_destructed1);
EXPECT_FALSE(was_destructed2);
ptr.reset();
EXPECT_TRUE(was_destructed2);
}
TEST(UniquePtrTest, Release)
{
auto value = new int{123};
unique_ptr<int> ptr{value};
EXPECT_EQ(ptr.release(), value);
EXPECT_EQ(ptr.get(), nullptr);
delete value;
}
TEST(UniquePtrTest, Swap)
{
auto value1 = new int{123};
unique_ptr<int> ptr1{value1};
auto value2 = new int{456};
unique_ptr<int> ptr2{value2};
ptr1.swap(ptr2);
EXPECT_EQ(ptr1.get(), value2);
EXPECT_EQ(ptr2.get(), value1);
}
TEST(UniquePtrTest, Comparison)
{
unique_ptr<int> ptr1{new int{123}};
unique_ptr<int> ptr2{new int{456}};
unique_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);
}
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