How to test javascript Promise function in jasmine

Question

this.result = new Promise( function( resolve, reject ){
   self.resolveMethod = resolve;
   self.rejectMethod = reject;
});

How can I test resolveMethod and rejectMethod are functions? Thanks

Possible duplicate of [How can I check if a javascript variable is function type?](http://stackoverflow.com/questions/5999998/how-can-i-check-if-a-javascript-variable-is-function-type) — Caramiriel, Sep 08 '16 at 10:26

score 2 · Answer 1 · answered Sep 08 '16 at 10:00

2

Use this helper method and assert.

function isFunctionA(object) {
 return object && getClass.call(object) == '[object Function]';
}

answered Sep 08 '16 at 10:00

Herr Derb

4,977
5
34
62

score 0 · Answer 2 · answered Sep 08 '16 at 12:36

0

You could try something like:

expect(type(result.resolveMethod).toBe('function');
expect(type(result.rejectMethod).toBe('function');

answered Sep 08 '16 at 12:36

Pedro Vaz

820
5
11

score 0 · Accepted Answer · answered Sep 12 '16 at 10:26

This is working for me

describe('result', function() {
    it('should assign resolve function to resolveMethod', function() {
        expect( instance.resolveMethod ).toEqual( jasmine.any(Function) );
    });
    it('should assign reject function to rejectMethod', function() {
        expect( instance.rejectMethod ).toEqual( jasmine.any(Function) );
    });       
});

How to test javascript Promise function in jasmine

3 Answers3