Add more tests for no-did-update-set-state

Author: jaaberg

tests/lib/rules/no-did-update-set-state.js

@@ -107,6 +107,20 @@ ruleTester.run('no-did-update-set-state', rule, {
     errors: [{
       message: 'Do not use setState in componentDidUpdate'
     }]
+  }, {
+    code: `
+      class Hello extends React.Component {
+        componentDidUpdate = () => {
+          this.setState({
+            data: data
+          });
+        }
+      }
+    `,
+    parser: 'babel-eslint',
+    errors: [{
+      message: 'Do not use setState in componentDidUpdate'
+    }]
   }, {
     code: `
       var Hello = createReactClass({