// Copyright 2016 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#pragma once

#include <unittest/unittest.h>
#include <fbl/intrusive_hash_table.h>

namespace fbl {
namespace tests {
namespace intrusive_containers {

using ::fbl::internal::is_sentinel_ptr;

// There is not all that much we can sanity check about a singly linked list.
// Basically, all we know is that every link in the list (including head) needs
// to be non-null and that the last link in the chain is terminated with the
// proper sentinel value.
class SinglyLinkedListChecker {
public:
    template <typename ContainerType>
    static bool SanityCheck(const ContainerType& container) {
        using NodeTraits = typename ContainerType::NodeTraits;
        using PtrTraits  = typename ContainerType::PtrTraits;
        BEGIN_TEST;

        typename PtrTraits::RawPtrType tmp = container.head_;
        while (true) {
            ASSERT_NONNULL(tmp, "");

            if (is_sentinel_ptr(tmp)) {
                ASSERT_EQ(container.sentinel(), tmp, "");
                break;
            }

            tmp = NodeTraits::node_state(*tmp).next_;

        }

        END_TEST;
    }
};

}  // namespace intrusive_containers
}  // namespace tests
}  // namespace fbl