test.js

const MyThing = () => {
  return _react2.default.createElement('div', 
    _react2.default.createElement(Title), 
    _react2.default.createElement(Counter, {panda:42}),
    _react2.default.createElement(ButtonCounterInc),
    _react2.default.createElement(ButtonTitle)
  );
};

test.jsx

const MyThing = () => {
  return <div>
      <Title />
      <Counter panda="42"/>
      <ButtonCounterInc />
      <ButtonTitle />
    </div>
}