Add test for custom state

test/basic.test.js

@@ -101,6 +101,11 @@ test('/redirect -> check redirected source', async t => {
   t.true(html.includes('<h1>Index page</h1>'))
 })
 
+test.only('/special-state -> check window.__NUXT__.test = true', async t => {
+  const window = await nuxt.renderAndGetWindow(url('/special-state'))
+  t.is(window.__NUXT__.test, true)
+})
+
 test('/error', async t => {
   try {
     await nuxt.renderRoute('/error', { req: {}, res: {} })

test/fixtures/basic/pages/special-state.vue

@@ -0,0 +1,15 @@
+<template>
+  <h1>Special state in `window.__NUXT__`</h1>
+</template>
+
+<script>
+export default {
+  fetch ({ isServer, beforeNuxtRender }) {
+    if (isServer) {
+      beforeNuxtRender(({ nuxtState }) => {
+        nuxtState.test = true
+      })
+    }
+  }
+}
+</script>

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

@@ -14,7 +14,7 @@ module.exports = {
   transition: 'test',
   offline: true,
   plugins: [
-    '~/plugins/test.js', // Use ~ for deprication warning coverage
+    '~/plugins/test.js',
     { src: '~/plugins/only-client.js', ssr: false }
   ],
   loading: '~/components/loading',