How can I test keydown events in Jasmine with specific keyCode on Angular2+

Question

In my application I have an <input> field on which I want to trigger keydown events.

My Setup

• Karma v1.7.1 test runner
• Chrome browser running the tests
• Angular 5

How can I do this?

Answer 1

Found a solution. I created a function that can be called passing the key code as parameter:

function keyDown(key: number) {
    fixture.debugElement.query(By.css('input')).triggerEventHandler('keydown', { key: key });
}