cpp-lazy-stream/test/stream_test.h

//
//  stream_test.h
//  stream
//
//  Created by Sam Jaffe on 4/2/23.
//

#pragma once

#include "xcode_gtest_helper.h"

namespace ranges = stream::ranges;
namespace views = stream::ranges::views;

namespace stream::ranges::testing {
template <typename It1, typename S1, typename It2, typename S2,
          typename Cmp = std::equal_to<>>
bool equal(It1 it1, S1 end1, It2 it2, S2 end2,
           ::testing::MatchResultListener * result_listener, Cmp cmp = {}) {
  size_t n = 0;
  for (; it1 != end1 && it2 != end2; ++it1, ++it2, ++n) {
    auto const & left = *it1;
    auto const & right = *it2;
    if (!std::invoke(cmp, left, right)) {
      *result_listener << "at index " << n << " where values were: [" << left
                       << "," << right << "] differ";
      return false;
    }
  }
  *result_listener << "whose sizes differ";
  return (it1 != end1) == (it2 != end2);
}
}

MATCHER_P(RangesEq, to_range, "") {
  return stream::ranges::testing::equal(arg.begin(), arg.end(),
                                        to_range.begin(), to_range.end(),
                                        result_listener);
}