Function TEST

tests/gtest_xml_null_subtree_id.cpp:17–37

BUG-7: If a element inside is missing the "ID" attribute, Attribute("ID") returns nullptr, which is used as a key in std::unordered_map — undefined behavior (null pointer dereference). After the fix, this should throw a descriptive RuntimeError.

// key in std::unordered_map — undefined behavior (null pointer dereference).
// After the fix, this should throw a descriptive RuntimeError.
TEST(XMLParserTest, SubTreeModelMissingID_Bug7)
{
  const std::string xml_text = R"(
  <root BTCPP_format="4">
    <BehaviorTree ID="MainTree">
      <AlwaysSuccess />
    </BehaviorTree>
    <TreeNodesModel>
      <SubTree>
        <input_port name="some_port"/>
      </SubTree>
    </TreeNodesModel>
  </root>
  )";

  BehaviorTreeFactory factory;

  // Before fix: crash (null pointer as map key)
  // After fix: should throw RuntimeError about missing ID
  EXPECT_THROW(factory.registerBehaviorTreeFromText(xml_text), RuntimeError);
}