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/*=========================================================================
*
* Copyright NumFOCUS
*
* 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.txt
*
* 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 "itkGTest.h"
#include "itkWeakPointer.h"
#include "itkLightObject.h"
#include <type_traits> // For is_default_constructible, is_copy_constructible, etc.
namespace
{
using WeakPointerType = itk::WeakPointer<itk::LightObject>;
template <typename T>
constexpr bool
AllSpecialMemberFunctionsNoThrow()
{
return std::is_nothrow_default_constructible_v<T> && std::is_nothrow_copy_constructible_v<T> &&
std::is_nothrow_copy_assignable_v<T> && std::is_nothrow_move_constructible_v<T> &&
std::is_nothrow_move_assignable_v<T> && std::is_nothrow_destructible_v<T>;
}
} // namespace
static_assert(AllSpecialMemberFunctionsNoThrow<WeakPointerType>(),
"All special member functions should be non-throwing.");
TEST(WeakPointer, DefaultConstructedEqualsNullptr)
{
ASSERT_EQ(WeakPointerType{}, nullptr);
ASSERT_TRUE(WeakPointerType{} == nullptr);
ASSERT_TRUE(nullptr == WeakPointerType{});
}
TEST(WeakPointer, CheckNull)
{
WeakPointerType nullPtr;
ASSERT_TRUE(nullPtr.IsNull());
itk::LightObject::Pointer lightObject = itk::LightObject::New();
WeakPointerType ptr = lightObject.GetPointer();
ASSERT_TRUE(ptr.IsNotNull());
}
TEST(WeakPointer, CheckSerialization)
{
WeakPointerType nullPtr;
std::cout << nullPtr << std::endl;
itk::LightObject::Pointer lightObject = itk::LightObject::New();
WeakPointerType ptr = lightObject.GetPointer();
std::cout << ptr << std::endl;
}
TEST(WeakPointer, ConvertedFromNullptrEqualsNullptr)
{
ASSERT_EQ(WeakPointerType{ nullptr }, nullptr);
ASSERT_TRUE(WeakPointerType{ nullptr } == nullptr);
ASSERT_TRUE(nullptr == WeakPointerType{ nullptr });
}
TEST(WeakPointer, AssignedFromNullptrEqualsNullptr)
{
WeakPointerType ptr;
ptr = nullptr;
ASSERT_EQ(ptr, nullptr);
ASSERT_TRUE(ptr == nullptr);
ASSERT_TRUE(nullptr == ptr);
}
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