Angular/Jasmine testing private function called

Question

I am trying to gain some percents in code coverage but I cant figure out how to do it. This is part of code where i am getting functions not tested.

    init(){
        this.subscription.add(someStuff.subscribe(() => this.myPrivateMethod()));
    }

    private myPrivateMethod() {
        ...
    }

Well now I am getting at least two not tested functions in code coverage. First one is this () => second one is this private myPrivateMethod() But how can I test it? The first one I have no idea and the second is private.

I'd say you can test both by simply sending some value to that `someStuff` observable — callback, Jan 31 '22 at 10:25
@callback thanks I am still pretty new in this going to try it — JGeorgeJ, Jan 31 '22 at 10:26
maybe https://stackoverflow.com/questions/34607990/unit-testing-an-observable-in-angular-2 can help — callback, Jan 31 '22 at 10:29

score 2 · Answer 1 · answered Sep 07 '22 at 15:08

2

Fyi you can access a private method directly with component['myPrivateMethod']().

answered Sep 07 '22 at 15:08

Pascal R.

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score -1 · Answer 2 · answered Jan 31 '22 at 12:40

You should always test your public interface, not private functions

Private functions could not be tested, because other files do not have access to it. You could test it with workaround, by using bracket notatation i.e component['myPrivateMethod'], but it is not recommended. You could also change it to public, then you will be able to test it.

Angular/Jasmine testing private function called

2 Answers2