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

1 vote291 views1 answer
Angular get current time
Javascript AngularJS
5 votes292 views2 answers
Angular how to copy text with button
Javascript AngularJS
0 vote313 views1 answer
Radio button in reactive forms angular material
Javascript AngularJS
10 votes300 views3 answers
Pipe of date angular
Javascript AngularJS
0 vote308 views1 answer
Angular return observable with error
Javascript AngularJS
0 vote264 views1 answer
Http request body angular
Javascript AngularJS
0 vote299 views1 answer
Angular2-tree-diagram
Javascript AngularJS
0 vote294 views1 answer
Adding bootstrap to angular global styles
Javascript AngularJS
0 vote291 views1 answer
How to manually trigger browser back button from angular
Javascript AngularJS
0 vote310 views1 answer
Angular key value pipe compareFn example
Javascript AngularJS