Class Wrapper

src/__tests__/createTheming.test.js:130–140

    const WithThemeComponent = withTheme(Component);

    class Wrapper extends React.Component {
      componentDidMount() {
        expect(this.comp.foo()).toEqual('bar');
      }

      render() {
        return (
          <WithThemeComponent
            ref={component => {
              this.comp = component;
            }}
          />
        );
      }