Mock the window.setTimeout in a Jasmine test to avoid waiting

, but I was unable to make it work in a function that I’m calling and want to test. The example only shows using clock for a setTimeout in the spec tests and I couldn’t find a good example. Here is my current and slightly limited approach.

If we have a method we want to test:

var test = function{ var self = this; self.timeoutWasCalled = false; self.testWithTimeout = function{ window.setTimeout(function{ self.timeoutWasCalled = true; }, 6000); };

};

Here’s my testing code:

var realWindowSetTimeout = window.setTimeout; describe('test a method that uses setTimeout', function{ var testObject; beforeEach(function { // force setTimeout to be called right away, no matter what time they specify jasmine.getGlobal.setTimeout = function (funcToCall, millis) { funcToCall; }; testObject = new test; }); afterEach(function { jasmine.getGlobal.setTimeout = realWindowSetTimeout; }); it('should call the method right away', function{ testObject.testWithTimeout; expect(testObject.timeoutWasCalled).toBeTruthy; }); });

I got a good pointer from Andreas in this StackOverflow question.

This would also work for window.setInterval.

Other possible approaches:

• create a wrapper module of setTimeout and setInterval methods that can be mocked. This can be mocked with RequireJS or passed into the constructor.
• pass the window.setTimeout function into the method (this could get messy)