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// Copyright 2025 The Abseil Authors
//
// 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
//
// 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 "absl/base/internal/iterator_traits.h"
#include <forward_list>
#include <iterator>
#include <list>
#include <vector>
#include "gtest/gtest.h"
#include "absl/base/config.h"
#include "absl/base/internal/iterator_traits_test_helper.h"
namespace absl {
ABSL_NAMESPACE_BEGIN
namespace base_internal {
namespace {
TEST(IsAtLeastIteratorTest, IsAtLeastIterator) {
EXPECT_TRUE((IsAtLeastIterator<std::input_iterator_tag, int*>()));
EXPECT_TRUE((IsAtLeastIterator<std::forward_iterator_tag, int*>()));
EXPECT_TRUE((IsAtLeastIterator<std::bidirectional_iterator_tag, int*>()));
EXPECT_TRUE((IsAtLeastIterator<std::random_access_iterator_tag, int*>()));
EXPECT_TRUE((IsAtLeastIterator<std::input_iterator_tag,
std::vector<int>::iterator>()));
EXPECT_TRUE((IsAtLeastIterator<std::forward_iterator_tag,
std::vector<int>::iterator>()));
EXPECT_TRUE((IsAtLeastIterator<std::bidirectional_iterator_tag,
std::vector<int>::iterator>()));
EXPECT_TRUE((IsAtLeastIterator<std::random_access_iterator_tag,
std::vector<int>::iterator>()));
EXPECT_TRUE(
(IsAtLeastIterator<std::input_iterator_tag, std::list<int>::iterator>()));
EXPECT_TRUE((IsAtLeastIterator<std::forward_iterator_tag,
std::list<int>::iterator>()));
EXPECT_TRUE((IsAtLeastIterator<std::bidirectional_iterator_tag,
std::list<int>::iterator>()));
EXPECT_FALSE((IsAtLeastIterator<std::random_access_iterator_tag,
std::list<int>::iterator>()));
EXPECT_TRUE((IsAtLeastIterator<std::input_iterator_tag,
std::forward_list<int>::iterator>()));
EXPECT_TRUE((IsAtLeastIterator<std::forward_iterator_tag,
std::forward_list<int>::iterator>()));
EXPECT_FALSE((IsAtLeastIterator<std::bidirectional_iterator_tag,
std::forward_list<int>::iterator>()));
EXPECT_FALSE((IsAtLeastIterator<std::random_access_iterator_tag,
std::forward_list<int>::iterator>()));
EXPECT_TRUE((IsAtLeastIterator<std::input_iterator_tag,
std::istream_iterator<int>>()));
EXPECT_FALSE((IsAtLeastIterator<std::forward_iterator_tag,
std::istream_iterator<int>>()));
EXPECT_FALSE((IsAtLeastIterator<std::bidirectional_iterator_tag,
std::istream_iterator<int>>()));
EXPECT_FALSE((IsAtLeastIterator<std::random_access_iterator_tag,
std::istream_iterator<int>>()));
EXPECT_TRUE((IsAtLeastIterator<std::input_iterator_tag,
Cpp20ForwardZipIterator<int*>>()));
EXPECT_TRUE((IsAtLeastIterator<std::forward_iterator_tag,
Cpp20ForwardZipIterator<int*>>()));
EXPECT_FALSE((IsAtLeastIterator<std::bidirectional_iterator_tag,
Cpp20ForwardZipIterator<int*>>()));
EXPECT_FALSE((IsAtLeastIterator<std::random_access_iterator_tag,
Cpp20ForwardZipIterator<int*>>()));
}
} // namespace
} // namespace base_internal
ABSL_NAMESPACE_END
} // namespace absl
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