cpp-useful-iterators/test/recursive_iterator_accessors.t.h

//
//  recursive_iterator_accessors.t.h
//  iterator
//
//  Created by Sam Jaffe on 2/21/17.
//

#pragma once

#include <cxxtest/TestSuite.h>

class recursive_iterator_accessors_TestSuite : public CxxTest::TestSuite {
public:
  void test_access_iterator_types() {
    using layer1 = std::map<int, int>;
    using layer2 = std::vector<layer1>;
    using object_type = std::map<int, layer2>;
    object_type const obj{{ 1, {{{1, 1}}, {{2, 2}}}}, {2, {{{3, 3}, {4, 4}}}}};
    auto rit = make_recursive_iterator(obj);
    TS_ASSERT_EQUALS(typeid(decltype(std::get<0>(rit))).name(),
                     typeid(iterator::end_aware_iterator<object_type::const_iterator>).name());
    TS_ASSERT_EQUALS(typeid(decltype(std::get<1>(rit))).name(),
                     typeid(iterator::end_aware_iterator<layer2::const_iterator>).name());
    TS_ASSERT_EQUALS(typeid(decltype(std::get<2>(rit))).name(),
                     typeid(iterator::end_aware_iterator<layer1::const_iterator>).name());
  }
  
  void test_construct_inplace_recursive_iterator() {
    using layer1 = std::map<int, int>;
    using layer2 = std::vector<layer1>;
    using object_type = std::map<int, layer2>;
    object_type const obj{{ 1, {{{1, 1}}, {{2, 2}}}}, {2, {{{3, 3}, {4, 4}}}}};
    auto const it = make_end_aware_iterator(obj.begin(), obj.end());
    auto const it_1 = ++make_end_aware_iterator(it->second);
    auto const it_2 = make_end_aware_iterator(*it_1);
    TS_ASSERT_THROWS_NOTHING(make_recursive_iterator(it, it_1, it_2));
  }
  
  void test_access_iterator_values_match_inplace() {
    using layer1 = std::map<int, int>;
    using layer2 = std::vector<layer1>;
    using object_type = std::map<int, layer2>;
    object_type const obj{{ 1, {{{1, 1}}, {{2, 2}}}}, {2, {{{3, 3}, {4, 4}}}}};
    auto const it = make_end_aware_iterator(obj.begin(), obj.end());
    auto const it_1 = ++make_end_aware_iterator(it->second);
    auto const it_2 = make_end_aware_iterator(*it_1);
    iterator::recursive_iterator<object_type::const_iterator> rit{
      iterator::in_place,
      it, it_1, it_2
    };
    TS_ASSERT_EQUALS(std::get<0>(rit), it);
    TS_ASSERT_EQUALS(std::get<1>(rit), it_1);
    TS_ASSERT_EQUALS(std::get<2>(rit), it_2);
  }
};