[tests] displayName: add a test case

Author: golopot

tests/lib/rules/display-name.js

@@ -189,6 +189,13 @@ ruleTester.run('display-name', rule, {
       }
     `,
     parser: parsers.BABEL_ESLINT
+  }, {
+    code: `
+      export const Hello = React.memo(function Hello() {
+        return <p />;
+      })
+    `,
+    parser: parsers.BABEL_ESLINT
   }, {
     code: `
       var Hello = function() {