Function AnotherComponent

test/AppContainer.dev.test.js:2244–2258

()

        const spy = jest.fn();

        const AnotherComponent = () => <div>old</div>;

        class App extends React.Component {
          static getDerivedStateFromProps({ n }) {
            return { n };
          }

          render() {
            return (
              <div>
                hey {this.state.n} <AnotherComponent />
              </div>
            );
          }
        }

        // Can't always run polyfill, as running polyfill in React 16 will make
        // this test case pass even without the fix.