Add linked modules test (0.9.x) (facebook#1912)

* Add linked modules test

* Keep fallback after eject

Author: Timer

Diff for: packages/react-scripts/fixtures/kitchensink/integration/webpack.test.js

@@ -52,6 +52,12 @@ describe('Integration', () => {
       );
     });
 
+    it('linked modules', async () => {
+      const doc = await initDOM('linked-modules')
+
+      expect(doc.getElementById('feature-linked-modules').textContent).to.equal('2.0.0')
+    })
+
     it('svg inclusion', async () => {
       const doc = await initDOM('svg-inclusion');
 

Diff for: packages/react-scripts/fixtures/kitchensink/src/App.js

@@ -116,6 +116,9 @@ class App extends Component {
         import('./features/webpack/LinkedModules').then(f =>
           this.setFeature(f.default));
         break;
+      case 'linked-modules':
+        require.ensure([], () => this.setFeature(require('./features/webpack/LinkedModules').default));
+        break;
       case 'node-path':
         import('./features/env/NodePath').then(f => this.setFeature(f.default));
         break;