Add test for offline-plugin

test/fixtures/with-config/nuxt.config.js

@@ -10,8 +10,10 @@ module.exports = {
     }
   },
   cache: true,
+  offline: true,
   plugins: [
     '~plugins/test.js',
+    { src: '~plugins/offline.js', ssr: false },
     { src: '~plugins/only-client.js', ssr: false }
   ],
   loading: '~components/loading',

test/fixtures/with-config/plugins/offline.js

@@ -0,0 +1,4 @@
+if (process.env.NODE_ENV === 'production') {
+  var OfflinePlugin = require('offline-plugin/runtime')
+  OfflinePlugin.install()
+}

test/with-config.test.js

@@ -82,7 +82,7 @@ test('/test/about-bis (added with extendRoutes)', async t => {
 
 test('Check stats.json generated by build.analyze', t => {
   const stats = require(resolve(__dirname, 'fixtures/with-config/.nuxt/dist/stats.json'))
-  t.is(stats.assets.length, 23)
+  t.is(stats.assets.length, 26)
 })
 
 // Close server and ask nuxt to stop listening to file changes