Angular testing: How to access local variables in a method when testing

Question

I have a method that inside I have a condition that I want to test. Something like:

myMethod():void {
  let a:boolean;
  a = this.myService.getValue();

  if (a) { 
    doThis();
  if (!a) { 
    doThat();

so in my it I did something like:

it("Should check if doThis called", () => {
     spyOn(myService, "getValue").andReturn(true);
     component.myMethod();
     expect ...
});

But the condition wouldn't work and a would never get the "fake" value I mock with the spy

My question is if there's any way I can access / assign value to the local variable of myMethod() , a , or the only way is to make it global and then I can do in the it something like component.a =

Thanks.

Why not pass this.myService.getValue() as a parameter of myMethod? — tiagolisalves
– tiagolisalves, Commented Jul 26, 2019 at 3:59
Could be an idea, but right now this what the method looks like — Menahem Gil
– Menahem Gil, Commented Jul 26, 2019 at 4:48
a would never get the "fake" value I mock with the spy ?? Why is that ? — Sachin Gupta
– Sachin Gupta, Commented Jul 26, 2019 at 10:54

MangaRatnam · Accepted Answer · 2019-07-26 10:51:49Z

2

let a;
spyOn(myService,"getValue").and.callFake(function(data){
      a=data;
      expect(data).not.toBeNull();
component.myMethod();
    })

Try this may be help you

answered Jul 26, 2019 at 10:51

MangaRatnam

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