CODEWITHSUNDEEP
node.jsunit-testingtestingtypescriptjasmine
carchase
carchase

Reputation: 493

Jasmine - Spy on a function that is called in same file

This has bothered me for a while. I have two functions in the same file.

//fun.ts

export function fun1(){
    let msg = fun2();
    return msg;
}

export function fun2(): string{
    return "Some message";
}

I have a typescript spec that stubs fun2 and calls fun1. 

//fun.spec.ts

import * as Fun from 'fun';

describe('Stubing', () => {
    it('should stub the return value', () => {
        spyOn(Fun, 'fun2').and.returnValue("A different message");

        expect(Fun.fun1()).toEqual("A different message")
    });
});

But when I run the spec, the output I get is

Failures:
1) Stubing should stub the return value
1.1) Expected 'Some message' to equal 'A different message'.

I wrote the tests in typescript and then I have a gulp script that successfully transpiles and runs the jasmine specs. Everything works, the only thing that I can't figure out is why the spy is not working. An explanation would be appreciated.

Upvotes: 4

Views: 2358

Answers (1)

carchase
carchase

Reputation: 493

I finally figured this out. In fun.ts, I am directly calling the fun2 object, but my Jasmine spec has no access to that object. The only object the Jasmine spec can access is the exports object. If I want the spy to work I need to call fun2 on the exports object.

//fun.ts
export function fun1(){
    let msg = exports.fun2();
    console.log(msg);
}

export function fun2(): string{
    return "Some message";
}

Now when the spec executes I see

.
1 spec, 0 failures

Upvotes: 9

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