Use pragma settings to recognize fragment

Author: golopot

lib/rules/jsx-no-useless-fragment.js

@@ -3,29 +3,35 @@
  */
 
 'use strict';
+const pragmaUtil = require('../util/pragma');
 const docsUrl = require('../util/docsUrl');
 
 /**
  * Test whether a JSXElement is a fragment
  * @param {JSXElement} node
+ * @param {object} context
  * @returns {boolean}
  */
-function isFragment(node) {
+function isFragment(node, context) {
   const name = node.openingElement.name;
+  const reactPragma = pragmaUtil.getFromContext(context);
+  const fragmentPragma = pragmaUtil.getFragmentFromContext(context);
 
   // <Fragment>
   if (
     name.type === 'JSXIdentifier'
-    && name.name === 'Fragment'
+    && name.name === fragmentPragma
   ) {
     return true;
   }
 
-  // <*.Fragment>
+  // <React.Fragment>
   if (
     name.type === 'JSXMemberExpression'
+    && name.object.type === 'JSXIdentifier'
+    && name.object.name === reactPragma
     && name.property.type === 'JSXIdentifier'
-    && name.property.name === 'Fragment'
+    && name.property.name === fragmentPragma
   ) {
     return true;
   }
@@ -84,7 +90,7 @@ module.exports = {
 
     return {
       JSXElement(node) {
-        if (isFragment(node)) {
+        if (isFragment(node, context)) {
           checkChildrenLength(node);
         }
       },

tests/lib/rules/jsx-no-useless-fragment.js

@@ -46,7 +46,8 @@ ruleTester.run('jsx-no-uselses-fragment', rule, {
       parser: parsers.BABEL_ESLINT
     },
     '<NotFragment />',
-    '<React.NotFragment />'
+    '<React.NotFragment />',
+    '<NotReact.Fragment />'
   ],
   invalid: [
     {
@@ -78,10 +79,16 @@ ruleTester.run('jsx-no-uselses-fragment', rule, {
     },
     {
       code: `
-        <Any.Fragment>
+        <SomeReact.SomeFragment>
           {foo}
-        </Any.Fragment>
+        </SomeReact.SomeFragment>
       `,
+      settings: {
+        react: {
+          pragma: 'SomeReact',
+          fragment: 'SomeFragment'
+        }
+      },
       errors: [{messageId: 'NeedsMoreChidren'}]
     },
     {