submitEl.triggerEventHandler is not a function in Angular 5

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Hi I am writing unit test cases in Angular5 Jasmine. I am trying to submit a form. I am writing unit test cases for submitting the form. Below is my form.

<form *ngIf="formResetToggle" class="form-horizontal" name="scopesEditorForm" #f="ngForm" novalidate (ngSubmit)="f.form.valid && isScopeValid() ? saveScope() : showErrorAlert('Please enter mandatory fields')">
     <input autofocus type="text" id="scopename" name="scopename" placeholder="Enter scope name" class="form-control" [(ngModel)]="scopeEdit.scopevalue" #scopename="ngModel" required />
     <button type="button" (click)="editorModal.hide()" class="btn btn-default" data-dismiss="modal">Cancel</button>

Below is my spec.ts file.

describe('ScopeEditorComponent', () => {

    let component: ScopeEditorComponent;
    let fixture: ComponentFixture<ScopeEditorComponent>;
    let submitEl: DebugElement;
    let scopeValue: DebugElement;

      beforeEach(async(() => {
            imports: [
            declarations: [
 fixture = TestBed.createComponent(ScopeEditorComponent);
        component = fixture.componentInstance;
        service = new PermissionEndpointMock();

        submitEl = fixture.debugElement.query(By.css('button')).nativeElement;
        scopeValue = fixture.debugElement.query(By.css('#scopename'));

 it('should create the scope component', async(() => {
     it('add scope', () => {
        let scope: Scope;
        scopeValue.nativeElement.value = "";

        // Subscribe to the Observable and store the user in a local variable.
        component.addscopeEventEmitter.subscribe((value) => scope = value);
        // This sync emits the event and the subscribe callback gets executed above
        submitEl.triggerEventHandler('click', null);

        // Now we can check to make sure the emitted value is correct

Below code throws error submitEl.triggerEventHandler is not a function. Can someone help me to fix this? Thank you

try to use

submitEl = fixture.debugElement.nativeElement.querySelector('button');


submitEl.triggerEventHandler is not a function in Angular 5, 1️⃣ Angular's triggerEventHandler() Method. The Angular It will not trigger change detection automatically; we need to call it ourselves. 3. Different from what  We can test inputs by just setting values on a component’s input properties. We can test outputs by subscribing to an EventEmitters observable and storing the emitted values on local variables. In combination with the previous lectures and the ability to test inputs and outputs we should now have …

triggerEventHandler is not defined on the nativeElement; inside describe, change

submitEl = fixture.debugElement.query(By.css('button')).nativeElement;


submitEl = fixture.debugElement.query(By.css('button'));

Simulating Events in Angular Unit Tests, Your browser does not currently recognize any of the video formats available. 5​, In the login function we emit a new user model on the loggedIn event. fixture: ComponentFixture<LoginComponent>; let submitEl: DebugElement; let loginEl: triggerEventHandler('click', null); // Now we can check to make sure the emitted​  The following tutorial is a part of our 100% free course Learn Angular 5 from Scratch - Angular 5 Tutorial. In the previous lesson, we defined a template along with some Sass (SCSS) styling. In order to make our project more dynamic, we can utilize interpolation, property and event binding.

I have tried this way:

submitEl = fixture.debugElement.nativeElement.querySelector('button');;

But, unfortunately it just emits a click event, but doesn't start the click handler from the component. The only way I've found, is just to call the handler explicitly:


Testing Components • Angular, CORE ·. May. 21, 18 · DevOps Zone · Tutorial. Like (5). Comment (0) Before writing the unit test specs we need to write down an angular component first. Testing an Output event is not as simple as an Input method because output event is submitEl.triggerEventHandler('click', null);. // Now we can check to make sure  Resources in Angular 4 (and 5) are scarce. Sometimes I get so lost in sifting through Stack Overflow that I end up translating the answers that I have found in older versions (1.x and 2.x) using the latest Angular docs. One of the tasks in the project that I am working on involves uploading a file using either a drag-and-drop box or by clicking

Unit Testing in Angular 4 Using Jasmine and Karma - Part 2, I'm submitting a (check one with "x") [x] bug report [ ] feature request [ ] support request Current behavior Given a RouterLink on an anchor tag  There are two major versions of the framework: AngularJS (version 1) and Angular (version 2+). Since version 2, Angular is no longer a JavaScript framework, so there’s a huge difference between them, warranting a fundamental name change.

RouterTestingModule: `DebugElement.triggerEventHandler` errors , In this article, we will discuss how to perform Unit Test on Angular 5 Components. Tesing an Output event is not as simple as an Input method. componentInstance;; submitEl = fixture. triggerEventHandler('click', null);; // Now we can check to make sure the emitted value is correct; expect(user. As of Angular 5.0, the older Http service still works, but it's deprecated and has been removed in Angular 6.0. The code samples in this post are compatible with Angular 4.3 and 5.x (and 6.x with rxjs-compat). If your project is still using Angular 4.2 or lower, including Angular 2, see my previous posts on making API calls with the Http service.

Learn Angular 4.0 In 10 Days - Unit Test, In that clicking, the submit button is not calling the onSubmit method in submitEl.triggerEventHandler('click', null); // expect(loginButtonSpy). Angular 5 Subscribe not a function; angular 5: templateRef.createEmbeddedView is not a function; Angular 2- Subscribe is not a function error; subscribe is not a function - ionic 4; Subscribe is not a function error; Angular 5 - Property 'subscribe' does not exist on type '() => Observable<any>' map is not a function in Angular 5

  • That was it! :)