moving fnc to file level

Author: DianaSuvorova

lib/util/Components.js

@@ -14,7 +14,7 @@ const usedPropTypesAreEquivalent = (propA, propB) => {
   if (propA.name === propB.name) {
     if (!propA.allNames && !propB.allNames) {
       return true;
-    } else if (propA.allNames.join('') === propB.allNames.join('')) {
+    } else if (Array.isArray(propA.allNames) && Array.isArray(propB.allNames) && propA.allNames.join('') === propB.allNames.join('')) {
       return true;
     }
     return false;

tests/lib/rules/no-unused-prop-types.js

@@ -1914,10 +1914,32 @@ ruleTester.run('no-unused-prop-types', rule, {
         '    test: React.PropTypes.bool',
         '};'
       ].join('\n')
+    }, {
+      // issue 1268
+      code: [
+        'export default function SampleComp(props) {',
+        ' function buildText(text) {',
+        '  return (',
+        '   <span>',
+        '    {text}',
+        '    {props.append}',
+        '   </span>',
+        '  );',
+        ' }',
+        ' return (',
+        '   <div>',
+        '    {buildText(props.text)}',
+        '   </div>',
+        '  );',
+        ' }',
+        'SampleComp.propTypes = {',
+        ' text: PropTypes.string,',
+        ' append: PropTypes.string',
+        '};'
+      ].join('\n')
     }
   ],
 
-
   invalid: [
     {
       code: [