tree_node_test.cpp

// Standalone C++17 test: no Qt required.
#include "dbc_tree_builder.h"
#include <stdexcept>
#include <type_traits>
 
static void Check(bool condition) {
    if (!condition) throw std::runtime_error("Tree navigation test failed");
}
 
int main() {
    static_assert(!std::is_move_constructible<TreeNode>::value, "Node addresses must be stable");
    DbcDatabase database;
    FrameInfo frame;
    SignalInfo signal;
    frame.signals.push_back(signal);
    frame.signals.push_back(signal);
    database.frames.push_back(frame);
    database.frames.push_back(frame);
    std::unique_ptr<TreeNode> root = DbcTreeBuilder().Build(database);
    Check(root->GetParent() == nullptr && root->GetRow() == 0);
    root->AddChild(nullptr);
    Check(root->GetChildCount() == 2 && !root->GetChild(2));
    for (std::size_t row = 0; row < root->GetChildCount(); ++row) {
        const TreeNode *child = root->GetChild(row);
        Check(child->GetParent() == root.get() && child->GetRow() == row);
        for (std::size_t position = 0; position < child->GetChildCount(); ++position) {
            const TreeNode *leaf = child->GetChild(position);
            Check(leaf->GetParent() == child && leaf->GetRow() == position);
        }
    }
    std::unique_ptr<TreeNode> transferred = std::move(root);
    Check(transferred->GetChild(0)->GetParent() == transferred.get());
}