Add React.PureComponent support (fixes #737)

Author: yannickcr

lib/util/Components.js

@@ -170,7 +170,7 @@ function componentRule(rule, context) {
       if (!node.superClass) {
         return false;
       }
-      return new RegExp('^(' + pragma + '\\.)?Component$').test(sourceCode.getText(node.superClass));
+      return new RegExp('^(' + pragma + '\\.)?(Pure)?Component$').test(sourceCode.getText(node.superClass));
     },
 
     /**
@@ -192,7 +192,7 @@ function componentRule(rule, context) {
       });
 
       var relevantTags = commentAst.tags.filter(function(tag) {
-        return tag.name === 'React.Component';
+        return tag.name === 'React.Component' || tag.name === 'React.PureComponent';
       });
 
       return relevantTags.length > 0;

tests/lib/rules/prop-types.js

@@ -2255,6 +2255,36 @@ ruleTester.run('prop-types', rule, {
       errors: [
         {message: '\'bar\' is missing in props validation'}
       ]
+    }, {
+      code: [
+        'class Hello extends React.PureComponent {',
+        '  render() {',
+        '    return <div>Hello {this.props.name}</div>;',
+        '  }',
+        '}'
+      ].join('\n'),
+      parserOptions: parserOptions,
+      errors: [{
+        message: '\'name\' is missing in props validation',
+        line: 3,
+        column: 35,
+        type: 'Identifier'
+      }]
+    }, {
+      code: [
+        'class Hello extends PureComponent {',
+        '  render() {',
+        '    return <div>Hello {this.props.name}</div>;',
+        '  }',
+        '}'
+      ].join('\n'),
+      parserOptions: parserOptions,
+      errors: [{
+        message: '\'name\' is missing in props validation',
+        line: 3,
+        column: 35,
+        type: 'Identifier'
+      }]
     }
   ]
 });