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Fix ReactShallowRenderer not rerendering when calling forceUpdate() #11439

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Merged
gaearon merged 2 commits into from
Nov 3, 2017
Merged

Fix ReactShallowRenderer not rerendering when calling forceUpdate() #11439

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09e3a63
Fix ReactShallowRenderer not rerendering when calling forceUpdate()
d4rky-pl Nov 3, 2017
4207883
Style nit
gaearon Nov 3, 2017
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6 changes: 4 additions & 2 deletions packages/react-test-renderer/src/ReactShallowRenderer.js
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Original file line number Diff line number Diff line change
Expand Up @@ -147,9 +147,11 @@ class ReactShallowRenderer {
// Fallback to previous instance state to support rendering React.cloneElement()
const state = this._newState || this._instance.state || emptyObject;

if (typeof this._instance.shouldComponentUpdate === 'function') {
if (
typeof this._instance.shouldComponentUpdate === 'function' &&
!this._forcedUpdate
) {
if (
this._forcedUpdate ||
this._instance.shouldComponentUpdate(props, state, context) === false
) {
this._instance.context = context;
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18 changes: 18 additions & 0 deletions packages/react-test-renderer/src/__tests__/ReactShallowRenderer-test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -142,6 +142,24 @@ describe('ReactShallowRenderer', () => {
expect(scuCounter).toEqual(0);
});

it('should rerender when calling forceUpdate', () => {
let renderCounter = 0;
class SimpleComponent extends React.Component {
render() {
renderCounter += 1;
return <div />;
}
}

const shallowRenderer = createRenderer();
shallowRenderer.render(<SimpleComponent />);
expect(renderCounter).toEqual(1);

const instance = shallowRenderer.getMountedInstance();
instance.forceUpdate();
expect(renderCounter).toEqual(2);
});

it('should shallow render a functional component', () => {
function SomeComponent(props, context) {
return (
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