unit testing, why callThrough is used?

[muhammedbasilsk]

Hey @lathonez ,

I have a doubt on a line you wrote in the spec.

spyOn(instance['clickerService'], 'newClicker').and.callThrough();

Here why should we use callThrough (which will trigger the actual service instead of the mock.) ? Why the mock service method is not used here?

[lathonez]

The mock is provided at compile time:

https://github.com/lathonez/clicker/blob/master/src/components/clickerForm/clickerForm.spec.ts#L11

and

https://github.com/lathonez/clicker/blob/master/src/test.ts#L63.

So no the actual service isn't in use at all.

[muhammedbasilsk]

Thanks for the explanation. Really appreciate it. 👍

[lathonez]

#191