test(picker): adds push() to test hardware go back

src/components/picker/test/basic/app-module.ts

@@ -1,5 +1,5 @@
 import { Component, ViewEncapsulation, NgModule } from '@angular/core';
-import { IonicApp, IonicModule, PickerController } from '../../../..';
+import { IonicApp, IonicModule, NavController, PickerController } from '../../../..';
 
 
 @Component({
@@ -10,7 +10,14 @@ export class E2EPage {
   smoothie: string;
   timer: string;
 
-  constructor(private pickerCtrl: PickerController) {}
+  constructor(
+    public navCtrl: NavController,
+    private pickerCtrl: PickerController
+  ) { }
+
+  push() {
+    this.navCtrl.push(E2EPage);
+  }
 
   twoColumns() {
     let picker = this.pickerCtrl.create({

src/components/picker/test/basic/main.html

@@ -2,6 +2,9 @@
 
   <ion-navbar>
     <ion-title>Picker</ion-title>
+    <ion-buttons end>
+      <button ion-button strong (click)="push()">Push</button>
+    </ion-buttons>
   </ion-navbar>
 
 </ion-header>