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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.
*
*=========================================================================*/
// First include the header file to be tested:
#include "itkVectorContainer.h"
#include <gtest/gtest.h>
#include <cstdlib>
#include <string>
// The tested ElementIdentifier type.
using TestedElementIdentifierType = size_t;
// Test template instantiations for various TElement template arguments:
template class itk::VectorContainer<TestedElementIdentifierType, int>;
template class itk::VectorContainer<TestedElementIdentifierType, bool>;
template class itk::VectorContainer<TestedElementIdentifierType, std::string>;
namespace
{
template <typename T1, typename T2>
constexpr void
AssertSameType()
{
static_assert(std::is_same_v<T1, T2>);
}
template <typename TElementIdentifier, typename TElement>
constexpr bool
AssertVectorContainerHasSamePublicNestedTypesAsStdVector()
{
using VectorContainerType = itk::VectorContainer<TElementIdentifier, TElement>;
using StdVectorType = std::vector<TElement>;
// Check the list of nested types of `std::vector` from section [vector.overview] of the C++ Standard Working Draft of
// 2023-05-10, from https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/n4950.pdf.
AssertSameType<typename VectorContainerType::value_type, typename StdVectorType::value_type>();
AssertSameType<typename VectorContainerType::allocator_type, typename StdVectorType::allocator_type>();
AssertSameType<typename VectorContainerType::pointer, typename StdVectorType::pointer>();
AssertSameType<typename VectorContainerType::const_pointer, typename StdVectorType::const_pointer>();
AssertSameType<typename VectorContainerType::reference, typename StdVectorType::reference>();
AssertSameType<typename VectorContainerType::const_reference, typename StdVectorType::const_reference>();
AssertSameType<typename VectorContainerType::size_type, typename StdVectorType::size_type>();
AssertSameType<typename VectorContainerType::difference_type, typename StdVectorType::difference_type>();
AssertSameType<typename VectorContainerType::iterator, typename StdVectorType::iterator>();
AssertSameType<typename VectorContainerType::const_iterator, typename StdVectorType::const_iterator>();
AssertSameType<typename VectorContainerType::reverse_iterator, typename StdVectorType::reverse_iterator>();
AssertSameType<typename VectorContainerType::const_reverse_iterator,
typename StdVectorType::const_reverse_iterator>();
return true;
}
static_assert(AssertVectorContainerHasSamePublicNestedTypesAsStdVector<TestedElementIdentifierType, int>());
static_assert(AssertVectorContainerHasSamePublicNestedTypesAsStdVector<TestedElementIdentifierType, bool>());
template <typename TElementIdentifier, typename TElement>
void
ExpectContainerHasValueOfCreatedElementAtIdentifier(const TElementIdentifier identifier, const TElement value)
{
const auto vectorContainer = itk::VectorContainer<TElementIdentifier, TElement>::New();
vectorContainer->CreateElementAt(identifier) = value;
EXPECT_EQ(vectorContainer->ElementAt(identifier), value);
}
} // namespace
// Tests that a VectorContainer has the value of an element created by
// CreateElementAt(identifier) at the position specified by the identifier.
TEST(VectorContainer, HasValueOfCreatedElementAtIdentifier)
{
// Just pick a "pseudo-random" (magic) number as ElementIdentifier.
constexpr TestedElementIdentifierType magicIdentifier = 42;
ExpectContainerHasValueOfCreatedElementAtIdentifier(magicIdentifier, true);
ExpectContainerHasValueOfCreatedElementAtIdentifier(magicIdentifier, false);
for (int i = 0; i < 3; ++i)
{
ExpectContainerHasValueOfCreatedElementAtIdentifier(magicIdentifier, i);
}
}
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