Function test_map_const_iterators

tests/test_container_helpers.h:911–932

// Verifies: const_iterator works with find
template<template<typename, typename> class MapTemplate>
void test_map_const_iterators() {
    using MapContainer = MapTemplate<int, fl::shared_ptr<int>>;

    MapContainer m;
    populate_map(m, 7, make_shared_int(77));
    populate_map(m, 8, make_shared_int(88));

    const MapContainer& const_m = m;

    // Const find
    auto const_it = const_m.find(7);
    FL_CHECK(const_it != const_m.end());
    FL_CHECK(const_it->first == 7);
    FL_CHECK(*const_it->second == 77);

    // Const iteration
    int count = 0;
    for (auto it = const_m.begin(); it != const_m.end(); ++it) {
        count++;
    }
    FL_CHECK(count == 2);
}

// Test lower_bound and upper_bound
// Verifies: binary search operations return valid iterators