prop-types doesn't check nextProps of componentWillReceiveProps

Author: Tamas Sule

lib/rules/prop-types.js

@@ -606,6 +606,10 @@ module.exports = {
           type = 'destructuring';
           properties = node.params[0].properties;
           break;
+        case 'MethodDefinition':
+          type = 'destructuring';
+          properties = node.value.params[0].properties;
+          break;
         case 'VariableDeclarator':
           for (let i = 0, j = node.id.properties.length; i < j; i++) {
             // let {props: {firstname}} = this
@@ -1018,6 +1022,11 @@ module.exports = {
       },
 
       MethodDefinition: function(node) {
+        const destructuring = node.value && node.value.params && node.value.params[0] && node.value.params[0].type === 'ObjectPattern';
+        if (node.key.name === 'componentWillReceiveProps' && destructuring) {
+          markPropTypesAsUsed(node);
+        }
+
         if (!node.static || node.kind !== 'get' || !propsUtil.isPropTypesDeclaration(node)) {
           return;
         }

tests/lib/rules/prop-types.js

@@ -3095,6 +3095,26 @@ ruleTester.run('prop-types', rule, {
       errors: [
         {message: '\'foo\' is missing in props validation'}
       ]
+    }, {
+      code: [
+        'class Hello extends Component {',
+        '  static propTypes = {',
+        '    bar: PropTypes.func',
+        '  }',
+        '  componentWillReceiveProps({foo}) {',
+        '    if (foo) {',
+        '      return;',
+        '    }',
+        '  }',
+        '  render() {',
+        '    return <div bar={this.props.bar} />;',
+        '  }',
+        '}'
+      ].join('\n'),
+      parser: 'babel-eslint',
+      errors: [
+        {message: '\'foo\' is missing in props validation'}
+      ]
     }, {
       code: [
         'class Hello extends React.Component {',