Fix uncontrolled radios (#10156)

* Add fixture

* Fix Uncontrolled radio groups

* address feedback

* fix tests; prettier

* Update TestCase.js

fixtures/dom/public/react-loader.js

@@ -28,9 +28,8 @@ var query = parseQuery(window.location.search);
 var version = query.version || 'local';
 
 if (version !== 'local') {
-  REACT_PATH = 'https://unpkg.com/react@' + version + '/dist/react.min.js';
-  DOM_PATH =
-    'https://unpkg.com/react-dom@' + version + '/dist/react-dom.min.js';
+  REACT_PATH = 'https://unpkg.com/react@' + version + '/dist/react.js';
+  DOM_PATH = 'https://unpkg.com/react-dom@' + version + '/dist/react-dom.js';
 }
 
 document.write('<script src="' + REACT_PATH + '"></script>');

fixtures/dom/src/components/TestCase.js

@@ -9,6 +9,7 @@ const propTypes = {
   children: PropTypes.node.isRequired,
   title: PropTypes.node.isRequired,
   resolvedIn: semverString,
+  introducedIn: semverString,
   resolvedBy: PropTypes.string,
 };
 
@@ -31,6 +32,7 @@ class TestCase extends React.Component {
     const {
       title,
       description,
+      introducedIn,
       resolvedIn,
       resolvedBy,
       affectedBrowsers,
@@ -40,10 +42,10 @@ class TestCase extends React.Component {
     let {complete} = this.state;
 
     const {version} = parse(window.location.search);
-    const isTestRelevant =
+    const isTestFixed =
       !version || !resolvedIn || semver.gte(version, resolvedIn);
 
-    complete = !isTestRelevant || complete;
+    complete = !isTestFixed || complete;
 
     return (
       <section className={cn('test-case', complete && 'test-case--complete')}>
@@ -60,6 +62,15 @@ class TestCase extends React.Component {
         </h2>
 
         <dl className="test-case__details">
+          {introducedIn && <dt>First broken in: </dt>}
+          {introducedIn &&
+            <dd>
+              <a
+                href={'https://github.com/facebook/react/tag/v' + introducedIn}>
+                <code>{introducedIn}</code>
+              </a>
+            </dd>}
+
           {resolvedIn && <dt>First supported in: </dt>}
           {resolvedIn &&
             <dd>
@@ -89,7 +100,7 @@ class TestCase extends React.Component {
         </p>
 
         <div className="test-case__body">
-          {!isTestRelevant &&
+          {!isTestFixed &&
             <p className="test-case__invalid-version">
               <strong>Note:</strong>
               {' '}

fixtures/dom/src/components/fixtures/input-change-events/RadioGroupFixture.js

@@ -0,0 +1,58 @@
+import React from 'react';
+
+import Fixture from '../../Fixture';
+
+class RadioGroupFixture extends React.Component {
+  constructor(props, context) {
+    super(props, context);
+
+    this.state = {
+      changeCount: 0,
+    };
+  }
+
+  handleChange = () => {
+    this.setState(({changeCount}) => {
+      return {
+        changeCount: changeCount + 1,
+      };
+    });
+  };
+
+  handleReset = () => {
+    this.setState({
+      changeCount: 0,
+    });
+  };
+
+  render() {
+    const {changeCount} = this.state;
+    const color = changeCount === 2 ? 'green' : 'red';
+
+    return (
+      <Fixture>
+        <label>
+          <input
+            defaultChecked
+            name="foo"
+            type="radio"
+            onChange={this.handleChange}
+          />
+          Radio 1
+        </label>
+        <label>
+          <input name="foo" type="radio" onChange={this.handleChange} />
+          Radio 2
+        </label>
+
+        {' '}
+        <p style={{color}}>
+          <code>onChange</code>{' calls: '}<strong>{changeCount}</strong>
+        </p>
+        <button onClick={this.handleReset}>Reset count</button>
+      </Fixture>
+    );
+  }
+}
+
+export default RadioGroupFixture;

fixtures/dom/src/components/fixtures/input-change-events/index.js

@@ -4,6 +4,7 @@ import FixtureSet from '../../FixtureSet';
 import TestCase from '../../TestCase';
 import RangeKeyboardFixture from './RangeKeyboardFixture';
 import RadioClickFixture from './RadioClickFixture';
+import RadioGroupFixture from './RadioGroupFixture';
 import InputPlaceholderFixture from './InputPlaceholderFixture';
 
 class InputChangeEvents extends React.Component {
@@ -47,6 +48,24 @@ class InputChangeEvents extends React.Component {
 
           <RadioClickFixture />
         </TestCase>
+        <TestCase
+          title="Uncontrolled radio groups"
+          description={`
+            Radio inputs should fire change events when the value moved to
+            another named input
+          `}
+          introducedIn="15.6.0">
+          <TestCase.Steps>
+            <li>Click on the "Radio 2"</li>
+            <li>Click back to "Radio 1"</li>
+          </TestCase.Steps>
+
+          <TestCase.ExpectedResult>
+            The <code>onChange</code> call count should equal 2
+          </TestCase.ExpectedResult>
+
+          <RadioGroupFixture />
+        </TestCase>
 
         <TestCase
           title="Inputs with placeholders"

fixtures/dom/yarn.lock

@@ -2199,6 +2199,18 @@ fbjs@^0.8.1, fbjs@^0.8.4:
     setimmediate "^1.0.5"
     ua-parser-js "^0.7.9"
 
+fbjs@^0.8.9:
+  version "0.8.12"
+  resolved "https://registry.yarnpkg.com/fbjs/-/fbjs-0.8.12.tgz#10b5d92f76d45575fd63a217d4ea02bea2f8ed04"
+  dependencies:
+    core-js "^1.0.0"
+    isomorphic-fetch "^2.1.1"
+    loose-envify "^1.0.0"
+    object-assign "^4.1.0"
+    promise "^7.1.1"
+    setimmediate "^1.0.5"
+    ua-parser-js "^0.7.9"
+
 figures@^1.3.5:
   version "1.7.0"
   resolved "https://registry.yarnpkg.com/figures/-/figures-1.7.0.tgz#cbe1e3affcf1cd44b80cadfed28dc793a9701d2e"

src/renderers/dom/fiber/ReactDOMFiberComponent.js

@@ -754,6 +754,10 @@ var ReactDOMFiberComponent = {
         // happen after `updateDOMProperties`. Otherwise HTML5 input validations
         // raise warnings and prevent the new value from being assigned.
         ReactDOMFiberInput.updateWrapper(domElement, nextRawProps);
+
+        // We also check that we haven't missed a value update, such as a
+        // Radio group shifting the checked value to another named radio input.
+        inputValueTracking.updateValueIfChanged((domElement: any));
         break;
       case 'textarea':
         ReactDOMFiberTextarea.updateWrapper(domElement, nextRawProps);

src/renderers/dom/shared/__tests__/inputValueTracking-test.js

@@ -145,15 +145,11 @@ describe('inputValueTracking', () => {
   it('should stop tracking', () => {
     inputValueTracking.track(mockComponent);
 
-    expect(mockComponent._wrapperState.hasOwnProperty('valueTracker')).toBe(
-      true,
-    );
+    expect(mockComponent._wrapperState.valueTracker).not.toEqual(null);
 
     inputValueTracking.stopTracking(mockComponent);
 
-    expect(mockComponent._wrapperState.hasOwnProperty('valueTracker')).toBe(
-      false,
-    );
+    expect(mockComponent._wrapperState.valueTracker).toEqual(null);
 
     expect(input.hasOwnProperty('value')).toBe(false);
   });

src/renderers/dom/shared/inputValueTracking.js

@@ -12,6 +12,7 @@
 
 'use strict';
 
+var {ELEMENT_NODE} = require('HTMLNodeType');
 import type {Fiber} from 'ReactFiber';
 import type {ReactInstance} from 'ReactInstanceType';
 
@@ -23,6 +24,9 @@ type ValueTracker = {
 type WrapperState = {_wrapperState: {valueTracker: ?ValueTracker}};
 type ElementWithWrapperState = Element & WrapperState;
 type InstanceWithWrapperState = ReactInstance & WrapperState;
+type SubjectWithWrapperState =
+  | InstanceWithWrapperState
+  | ElementWithWrapperState;
 
 var ReactDOMComponentTree = require('ReactDOMComponentTree');
 
@@ -43,15 +47,11 @@ function getTracker(inst: any) {
   return inst._wrapperState.valueTracker;
 }
 
-function attachTracker(inst: InstanceWithWrapperState, tracker: ?ValueTracker) {
-  inst._wrapperState.valueTracker = tracker;
+function detachTracker(subject: SubjectWithWrapperState) {
+  subject._wrapperState.valueTracker = null;
 }
 
-function detachTracker(inst: InstanceWithWrapperState) {
-  delete inst._wrapperState.valueTracker;
-}
-
-function getValueFromNode(node) {
+function getValueFromNode(node: any) {
   var value;
   if (node) {
     value = isCheckable(node) ? '' + node.checked : node.value;
@@ -113,40 +113,46 @@ var inputValueTracking = {
     return getTracker(ReactDOMComponentTree.getInstanceFromNode(node));
   },
 
-  trackNode: function(node: ElementWithWrapperState) {
-    if (node._wrapperState.valueTracker) {
+  trackNode(node: ElementWithWrapperState) {
+    if (getTracker(node)) {
       return;
     }
     node._wrapperState.valueTracker = trackValueOnNode(node, node);
   },
 
-  track: function(inst: InstanceWithWrapperState) {
+  track(inst: InstanceWithWrapperState) {
     if (getTracker(inst)) {
       return;
     }
     var node = ReactDOMComponentTree.getNodeFromInstance(inst);
-    attachTracker(inst, trackValueOnNode(node, inst));
+    inst._wrapperState.valueTracker = trackValueOnNode(node, inst);
   },
 
-  updateValueIfChanged(inst: InstanceWithWrapperState | Fiber) {
-    if (!inst) {
+  updateValueIfChanged(subject: SubjectWithWrapperState | Fiber) {
+    if (!subject) {
       return false;
     }
-    var tracker = getTracker(inst);
+    var tracker = getTracker(subject);
 
     if (!tracker) {
-      if (typeof (inst: any).tag === 'number') {
-        inputValueTracking.trackNode((inst: any).stateNode);
+      if (typeof (subject: any).tag === 'number') {
+        inputValueTracking.trackNode((subject: any).stateNode);
       } else {
-        inputValueTracking.track((inst: any));
+        inputValueTracking.track((subject: any));
       }
       return true;
     }
 
     var lastValue = tracker.getValue();
-    var nextValue = getValueFromNode(
-      ReactDOMComponentTree.getNodeFromInstance(inst),
-    );
+
+    var node = subject;
+
+    // TODO: remove check when the Stack renderer is retired
+    if ((subject: any).nodeType !== ELEMENT_NODE) {
+      node = ReactDOMComponentTree.getNodeFromInstance(subject);
+    }
+
+    var nextValue = getValueFromNode(node);
 
     if (nextValue !== lastValue) {
       tracker.setValue(nextValue);

src/renderers/dom/stack/client/ReactDOMComponent.js

@@ -860,6 +860,9 @@ ReactDOMComponent.Mixin = {
         // happen after `_updateDOMProperties`. Otherwise HTML5 input validations
         // raise warnings and prevent the new value from being assigned.
         ReactDOMInput.updateWrapper(this);
+        // We also check that we haven't missed a value update, such as a
+        // Radio group shifting the checked value to another named radio input.
+        inputValueTracking.updateValueIfChanged(this);
         break;
       case 'textarea':
         ReactDOMTextarea.updateWrapper(this);