test(nav): create nav memory test

ionic/components/nav/test/memory/index.ts

@@ -0,0 +1,86 @@
+import {App, Page, NavController} from '../../../../../ionic/ionic';
+
+
+let delay = 100;
+let animate = false;
+let count = 0;
+
+@Page({
+  template: `
+    <ion-content padding text-center>
+      <p>Page 1</p>
+      <button (click)="stop()">Stop</button>
+      <button (click)="play()">Play</button>
+    </ion-content>
+  `
+})
+class Page1 {
+  tmr;
+
+  constructor(private nav: NavController) {}
+
+  play() {
+    this.tmr = setTimeout(() => {
+      count++;
+      console.log('push', count);
+
+      this.nav.push(Page2, null, {
+        animate: animate
+      });
+    }, delay);
+  }
+
+  onPageDidEnter() {
+    this.play();
+  }
+
+  stop() {
+    clearTimeout(this.tmr);
+  }
+}
+
+@Page({
+  template: `
+    <ion-content padding text-center>
+      <p>Page 2</p>
+      <button (click)="stop()">Stop</button>
+      <button (click)="play()">Play</button>
+    </ion-content>
+  `
+})
+class Page2 {
+  tmr;
+
+  constructor(private nav: NavController) {}
+
+  play() {
+    this.tmr = setTimeout(() => {
+      count++;
+      console.log('pop', count);
+
+      this.nav.pop({
+        animate: animate
+      });
+    }, delay);
+  }
+
+  onPageDidEnter() {
+    this.play();
+  }
+
+  stop() {
+    clearTimeout(this.tmr);
+  }
+}
+
+
+@App({
+  template: `<ion-nav [root]="root"></ion-nav>`
+})
+class E2EApp {
+  root;
+
+  constructor() {
+    this.root = Page1;
+  }
+}