cpp-useful-iterators/test/recursive_iterator_single_level_test.cxx

//
//  recursive_iterator_single_level_test.cxx
//  iterator-test
//
//  Created by Sam Jaffe on 8/11/20.
//  Copyright © 2020 Sam Jaffe. All rights reserved.
//

#include "iterator/recursive_iterator.hpp"

#include <map>
#include <vector>

#include "xcode_gtest_helper.h"

TEST(RecursiveIteratorSingleVectorTest, IterDistanceIsContainerSize) {
  std::vector<int> const vec{1, 2, 3, 4, 5};
  auto rit = make_recursive_iterator(vec);
  decltype(rit) end{};
  EXPECT_THAT(std::distance(rit, end), vec.size());
}

TEST(RecursiveIteratorSingleVectorTest, DataMatchesContainerIterator) {
  std::vector<int> const vec{1, 2, 3, 4, 5};
  auto rit = make_recursive_iterator(vec);
  decltype(vec) result(rit, decltype(rit)());
  EXPECT_THAT(result, vec);
}

TEST(RecursiveIteratorSingleVectorTest, CanMutatePointedToData) {
  std::vector<int> vec{1, 2, 3, 4, 5};
  auto rit = make_recursive_iterator(vec);
  *rit = 6;
  EXPECT_THAT(vec[0], 6);
}

TEST(RecursiveIteratorSingleMapTest, IterDistanceIsContainerSize) {
  std::map<int, int> const map{{1, 1}, {2, 2}, {3, 3}};
  auto rit = make_recursive_iterator(map);
  decltype(rit) end{};
  EXPECT_THAT(std::distance(rit, end), map.size());
}

TEST(RecursiveIteratorSingleMapTest, DataMatchesContainerIterator) {
  std::map<int, int> const map{{1, 1}, {2, 2}, {3, 3}};
  auto rit = make_recursive_iterator(map);
  decltype(map) result(rit, decltype(rit)());
  EXPECT_THAT(result, map);
}

TEST(RecursiveIteratorSingleMapTest, CanMutatePointedToData) {
  std::map<int, int> map{{1, 1}, {2, 2}, {3, 3}};
  auto rit = make_recursive_iterator(map);
  std::get<1>(*rit) = 4;
  EXPECT_THAT(map[1], 4);
}