Fix quoted propTypes in ES6 (fixes #77)

Author: Yannick Croissant

lib/rules/prop-types.js

@@ -165,7 +165,8 @@ module.exports = function(context) {
     switch (propTypes.type) {
       case 'ObjectExpression':
         for (var i = 0, j = propTypes.properties.length; i < j; i++) {
-          declaredPropTypes.push(propTypes.properties[i].key.name);
+          var key = propTypes.properties[i].key;
+          declaredPropTypes.push(key.type === 'Identifier' ? key.name : key.value);
         }
         break;
       case 'MemberExpression':

tests/lib/rules/prop-types.js

@@ -220,6 +220,21 @@ eslintTester.addRuleTest('lib/rules/prop-types', {
         destructuring: true,
         jsx: true
       }
+    }, {
+      code: [
+        'class Hello extends React.Component {',
+        '  render() {',
+        '    return <div>Hello {this.props.firstname}</div>;',
+        '  }',
+        '}',
+        'Hello.propTypes = {',
+        '  \'firstname\': React.PropTypes.string',
+        '};'
+      ].join('\n'),
+      ecmaFeatures: {
+        classes: true,
+        jsx: true
+      }
     }
   ],