add test.

test/dashboard2/src/partials/CustomToolbar.vue

@@ -0,0 +1,19 @@
+<template>
+  <v-ons-toolbar>
+    <div class="left">
+      <slot name="left">
+        <v-ons-back-button v-if="backLabel">
+          {{ backLabel }}
+        </v-ons-back-button>
+      </slot>
+    </div>
+    <div class="center"><slot>{{ title }}</slot></div>
+    <div class="right"><slot name="right"></slot></div>
+  </v-ons-toolbar>
+</template>
+
+<script>
+export default {
+  props: ['title', 'backLabel']
+}
+</script>