fix(angular): disable change detection detach

angular/test/test-app/src/app/modal-example/modal-example.component.ts

@@ -25,6 +25,9 @@ export class ModalExampleComponent implements OnInit {
   }
 
   ionViewWillEnter() {
+    if (this.onInit !== 1) {
+      throw new Error('ngOnInit was not called');
+    }
     NgZone.assertInAngularZone();
     this.willEnter++;
   }

angular/test/test-app/src/app/router-link-page/router-link-page.component.html

@@ -3,11 +3,11 @@
     <ion-buttons slot="start">
       <ion-back-button></ion-back-button>
     </ion-buttons>
+    <ion-title>router-link page</ion-title>
   </ion-toolbar>
 </ion-header>
 
-<ion-content>
-  router-link page
+<ion-content padding>
   <p>ngOnInit: <span id="ngOnInit">{{onInit}}</span></p>
   <p>ionViewWillEnter: <span id="ionViewWillEnter">{{willEnter}}</span></p>
   <p>ionViewDidEnter: <span id="ionViewDidEnter">{{didEnter}}</span></p>

angular/test/test-app/src/app/router-link-page/router-link-page.component.ts

@@ -18,6 +18,9 @@ export class RouterLinkPageComponent implements OnInit {
   }
 
   ionViewWillEnter() {
+    if (this.onInit !== 1) {
+      throw new Error('ngOnInit was not called');
+    }
     NgZone.assertInAngularZone();
     this.willEnter++;
   }

angular/test/test-app/src/app/router-link/router-link.component.ts

@@ -41,6 +41,9 @@ export class RouterLinkComponent implements OnInit {
   }
 
   ionViewWillEnter() {
+    if (this.onInit !== 1) {
+      throw new Error('ngOnInit was not called');
+    }
     NgZone.assertInAngularZone();
     this.willEnter++;
   }

angular/test/test-app/src/app/tabs/tabs.component.ts

@@ -1,14 +1,9 @@
-import { Component, OnInit } from '@angular/core';
+import { Component } from '@angular/core';
 
 @Component({
   selector: 'app-tabs',
   templateUrl: './tabs.component.html',
 })
-export class TabsComponent implements OnInit {
-
-  constructor() { }
-
-  ngOnInit() {
-  }
+export class TabsComponent {
 
 }