test: call created and mounted only once with spa and custom layout

test/fixtures/spa/layouts/default.vue

@@ -0,0 +1,7 @@
+<template>
+  <div>
+    Default layout
+    <br>
+    <nuxt/>
+  </div>
+</template>

test/fixtures/spa/pages/custom.vue

@@ -5,8 +5,10 @@
 <script>
 export default {
   layout: 'custom',
+  created() {
+    console.log('created') // eslint-disable-line no-console
+  },
   mounted() {
-    window.customMounted = (+window.customMounted) + 1
     console.log('mounted') // eslint-disable-line no-console
   }
 }

test/spa.test.js

@@ -1,4 +1,5 @@
 import test from 'ava'
+import stdMocks from 'std-mocks'
 import { Nuxt, Builder } from '../index.js'
 
 let nuxt = null
@@ -35,6 +36,17 @@ test('/custom (not default layout)', async t => {
   t.false(head.includes('src="/_nuxt/layouts/default.'))
 })
 
+test('/custom (call mounted and created once)', async t => {
+  stdMocks.use()
+  await renderRoute('/custom')
+  stdMocks.restore()
+  const output = stdMocks.flush()
+  const creates = output.stdout.filter(value => value === 'created\n')
+  t.true(creates.length === 1)
+  const mounts = output.stdout.filter(value => value === 'mounted\n')
+  t.true(mounts.length === 1)
+})
+
 // Close server and ask nuxt to stop listening to file changes
 test.after('Closing server and nuxt.js', t => {
   nuxt.close()