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

0 vote251 views1 answer
Onclick add active class in angular
Javascript AngularJS
1 vote252 views1 answer
Angular elementref
Javascript AngularJS
0 vote273 views2 answers
Angularjs - controllerAs
Javascript AngularJS
0 vote254 views2 answers
Angular schematics
Javascript AngularJS
0 vote220 views1 answer
Angular observer if not length
Javascript AngularJS
1 vote236 views4 answers
Angular 9 features
Javascript AngularJS
5 votes232 views2 answers
Angular how to copy text with button
Javascript AngularJS
7 votes215 views4 answers
Refresh current component angular
Javascript AngularJS
0 vote237 views1 answer
Angular patchValue dynamically
Javascript AngularJS
1 vote260 views1 answer
Data table in angular 8 from api
Javascript AngularJS