it('should pass previous state to shouldComponentUpdate even with getDerivedStateFromProps', () => { class SimpleComponent extends React.Component { constructor(props) { super(props); this.state = { value: props.value, }; } static getDerivedStateFromProps(nextProps, prevState) { if (nextProps.value === prevState.value) { return null; } return {value: nextProps.value}; } shouldComponentUpdate(nextProps, nextState) { return nextState.value !== this.state.value; } render() { return {`value:${this.state.value}`}
; } } const shallowRenderer = createRenderer(); const initialResult = shallowRenderer.render( , ); expect(initialResult).toEqual(value:initial
); const updatedResult = shallowRenderer.render( , ); expect(updatedResult).toEqual(value:updated
); }); it('can setState with an updater function', () => { let instance;"}
{"_id":"q-en-react-bf2111957274c2323d60535fc90eaa001fbba4cd45864a1d75ac2cd55e643bc0","text":"/** * Same as the default implementation, except cancels the event when return