Angular9 spy

it("should be able to upper case a string", function () {
var  spytoUpperCase  =  spyOn(String.prototype, 'toUpperCase')
expect(utils.toUpperCase).toBeDefined();
expect(utils.toUpperCase("hello world")).toEqual("HELLO WORLD");
expect(String.prototype.toUpperCase).toHaveBeenCalled();
expect(spytoUpperCase.calls.count()).toEqual(1);
});

Source: techiediaries.com

Similar codes

3 votes180 views1 answer
Call a function whenever routerlink is clicke angular
Javascript AngularJS
4 votes196 views3 answers
Get route query params angular
Javascript AngularJS
0 vote251 views1 answer
Reactive forms angular conditional disabling
Javascript AngularJS
1 vote209 views1 answer
Angular viewchild input element value
Javascript AngularJS
0 vote184 views1 answer
Ip address validation regex angular
Javascript AngularJS
2 votes151 views2 answers
Placeholder in angular 9 select with working required
Javascript AngularJS
10 votes214 views2 answers
Angular emit
Javascript AngularJS
139 votes367 views6 answers
Angular cli
Javascript AngularJS
0 vote332 views1 answer
Angular cannot access event.target.value of input element using $event
Javascript AngularJS
0 vote200 views1 answer
Is it possible to filter with multiple condition in angularjs?
Javascript AngularJS