#include <cruft/util/ranges/adjacent.hpp>

#include <cruft/util/tap.hpp>

#include <algorithm>

int main()
{
    static int const constexpr INPUT[] = { 1, 1, 2, 3, 5, 8 };
    static int const constexpr EXPECTED[][2] = {
        { 1, 1 },
        { 1, 2 },
        { 2, 3 },
        { 3, 5 },
        { 5, 8 },
    };

    cruft::TAP::logger tap;

    // Use a temporary in an attempt to trigger cvref related type errors when calling the range closure.
    std::span<int const> input_span (INPUT);
    const bool same = std::ranges::equal (
        input_span | cruft::ranges::pairwise,
        EXPECTED,
        [] (auto const &a, auto const &b) { return std::ranges::equal (a, b); }
    );

    tap.expect (same, "ranges::pairwise fibonacci");

    return tap.status ();
}