Fix props detection when used in an object (fixes #41)

Author: yannickcr

lib/util/component.js

@@ -36,29 +36,42 @@ function isReactComponent(context, node) {
   return Boolean(isEmptyComponentRender || isComponentRender);
 }
 
+/**
+ * Detect if the node is a component definition
+ * @param {ASTNode} node The AST node being checked.
+ * @returns {Boolean} True the node is a component definition, false if not.
+ */
+function isComponentDefinition(node) {
+  var isES6Component = node.type === 'ClassDeclaration';
+  var isES5Component = Boolean(
+    node.type === 'ObjectExpression' &&
+    node.parent &&
+    node.parent.callee &&
+    node.parent.callee.object &&
+    node.parent.callee.property &&
+    node.parent.callee.object.name === 'React' &&
+    node.parent.callee.property.name === 'createClass'
+  );
+  return isES5Component || isES6Component;
+}
+
 /**
  * Get the React component ASTNode from any child ASTNode
  * @param {Object} context The current rule context.
  * @param {ASTNode} node The AST node being checked.
  * @returns {ASTNode} The ASTNode of the React component.
  */
 function getNode(context, node) {
-  var componentNode;
-
-  if (node.type === 'ClassDeclaration' || node.type === 'ObjectExpression') {
-    componentNode = node;
-  } else {
-    var ancestors = context.getAncestors().reverse();
-    for (var i = 0, j = ancestors.length; i < j; i++) {
-      if (ancestors[i].type === 'ClassDeclaration' || ancestors[i].type === 'ObjectExpression') {
-        componentNode = ancestors[i];
-        break;
-      }
-    }
-  }
+  var componentNode = null;
+  var ancestors = context.getAncestors().reverse();
 
-  if (!componentNode) {
-    return null;
+  ancestors.unshift(node);
+
+  for (var i = 0, j = ancestors.length; i < j; i++) {
+    if (isComponentDefinition(ancestors[i])) {
+      componentNode = ancestors[i];
+      break;
+    }
   }
 
   return componentNode;
@@ -188,6 +201,7 @@ module.exports = {
   DEFAULT_COMPONENT_NAME: DEFAULT_COMPONENT_NAME,
   isReactComponent: isReactComponent,
   getNode: getNode,
+  isComponentDefinition: isComponentDefinition,
   getIdentifiers: getIdentifiers,
   List: List
 };

tests/lib/rules/prop-types.js

@@ -136,6 +136,23 @@ eslintTester.addRuleTest('lib/rules/prop-types', {
         classes: true,
         jsx: true
       }
+    }, {
+      code: [
+        'var Hello = React.createClass({',
+        '  propTypes: {',
+        '    name: React.PropTypes.object.isRequired',
+        '  },',
+        '  render: function() {',
+        '    var user = {',
+        '      name: this.props.name',
+        '    };',
+        '    return <div>Hello {user.name}</div>;',
+        '  }',
+        '});'
+      ].join('\n'),
+      ecmaFeatures: {
+        jsx: true
+      }
     }
   ],