Function test_map_find_and_iterate

tests/test_container_helpers.h:886–906

// Verifies: find() returns valid iterator, dereferencing works
template<template<typename, typename> class MapTemplate>
void test_map_find_and_iterate() {
    using MapContainer = MapTemplate<int, fl::shared_ptr<int>>;

    MapContainer m;
    auto ptr42 = make_shared_int(42);
    populate_map(m, 5, ptr42);
    populate_map(m, 10, make_shared_int(100));

    // Find and dereference
    auto it = m.find(5);
    FL_CHECK(it != m.end());
    FL_CHECK(it->first == 5);
    FL_CHECK(*it->second == 42);

    // Iterate from find result
    int count = 0;
    for (auto it2 = it; it2 != m.end(); ++it2) {
        count++;
    }
    FL_CHECK(count >= 1);  // At least the found element and beyond
}

// Test const iterator functionality
// Verifies: const_iterator works with find