How to spy date with jasmine-node

Question

As per the example given in official documentation ,

describe("Mocking the Date object", function(){
    it("mocks the Date object and sets it to a given time", function() {
      var baseTime = new Date(2013, 9, 23);

      jasmine.clock().mockDate(baseTime);
      :
    });
  });

It reports jasmine.clock is not a function . I'm using following dependencies in my project

  "devDependencies": {
    "jasmine": "^2.5.2",
    "jasmine-node": "^1.14.5"
  }

I also tried to mock Date object. But since I'm in node not on browser, I don't find/get window to mock any method.

Answer 1

First you need to install jasmine-mockdate .
Then test as follow:

describe("Mocking the Date object", function () {
    it("mocks the Date object and sets it to a given time", function () {
        var baseTime = new Date(2013, 9, 23);
        jasmine.clock().install();
        jasmine.clock().mockDate(baseTime);

        jasmine.clock().tick(50);
        expect(new Date().getTime()).toEqual(baseTime.getTime() + 50);        
    });
});

Hope this help.

Answer 2

I found that I was using unofficial jasmine library. So I should have used "jasmine-core" instead of "jasmine-node" to get support of latest jasmine release. However it still was failing to mock dates.

So I separated a function to return date. then;

1. I exported the function so it can be mocked. I used jasmine's spyOn to mock the behaviour of date function.
2. I found a npm library rewire which helps to access private variable or methods of a nodejs module. So it can also be used to spyOn date function instead of exporting it just because of mocking.