test: add test case for vuejs#2938

Author: posva

Diff for: examples/route-params/app.js

@@ -4,13 +4,14 @@ import VueRouter from 'vue-router'
 Vue.use(VueRouter)
 
 const Log = {
-  template: `<div class="log">id: {{$route.params.id}}, type: {{$route.params.type}}</div>`
+  template: `<div class="log">id: {{ $route.params.id }}, type: {{ $route.params.type }}</div>`
 }
 
 const Logs = {
   template: `
     <div>
-      <router-link :to="to" class="child-link">{{to.params.type}}</router-link>
+      <pre id="params">{{ to.params }}</pre>
+      <router-link :to="to" class="child-link">{{ to.params.type }}</router-link>
       <router-view></router-view>
     </div>
   `,

Diff for: test/e2e/specs/route-params.js

@@ -8,9 +8,12 @@ module.exports = {
       // https://github.com/vuejs/vue-router/issues/2800
       .click('li:nth-child(1) a')
       .assert.urlEquals('http://localhost:8080/route-params/items/1/logs')
+      .assert.containsText('#params', JSON.stringify({ type: 'info' }, null, 2))
       .click('.child-link')
       .assert.urlEquals('http://localhost:8080/route-params/items/1/logs/info')
       .assert.containsText('.log', 'id: 1, type: info')
+      // https://github.com/vuejs/vue-router/issues/2938
+      .assert.containsText('#params', JSON.stringify({ type: 'info' }, null, 2))
 
       .click('li:nth-child(2) a')
       .assert.urlEquals('http://localhost:8080/route-params/items/2/logs')