What is the best way to test a local variable in Angular 2 using karma and jasmine?

I've been working on writing a unit test with jasmine, but I've run into an issue when trying to test a local variable using jasmine. I have successfully tested a global variable in the past, but testing a local variable seems to be more challenging.

Here is the function I am currently working with:


checkDayIsOpen(): void {
  let isSpecial = false;
     this.items.forEach((item) => {
         if (item.is_open) {
             isSpecial = true;
         }
      });
   if(isSpeciality){
       // Call another function here...
     }
}

My main concern now is how to effectively test the value of isSpecial.

angulartypescriptkarma-jasmine

Answer №1

You won't be able to verify this directly as it vanishes after the call. However, you can check if another function was triggered.

describe("Testing toString() Method of Person Class", function() {
  it("verifies that getName() method is invoked", function() {
    var testPerson = new Person();
    spyOn(testPerson, "getName");
    testPerson.toString();
    expect(testPerson.getName).toHaveBeenCalled();
  });
});

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