makeJadeTransitionShim.ts

type Template<T> = (args: T) => string;
export function makeJadeTransitionShim<T>(jadeTemplate: Template<T>, Component: React.ComponentType<T>): Template<T> {
  return (args: T) => {
    const jadeResult = jadeTemplate(args);
    const reactResult = ReactDOMServer.renderToStaticMarkup(<Component {...args} />);
    assert(jadeResult === reactResult, 'Results not equal!');
    return jadeResult;
  };
}