Question

I am stuck to test the function that use $j(window).width(). This function return value according to this.Now my problem is this that i want to set window width in my Qunit function.Can any body help ???

Answer 1

In situations when you are expecting a value returned from an object that you don’t control or at least need to test, you should mock the return values. Take a look at JSMockito which is a JavaScript based mocking framework. Below is a simple example that mocks an Array object and sets the value to be returned when the test calls get(1) method.

var mockedObject = mock(Array);

when(mockedObject).get(1).thenReturn("hello world");

// -- start code under test --
alert(mockedObject.get(1));

// the following alerts 'true' as get(99) was not stubbed
alert(typeof (mockedObject.get(99)) === 'undefined');
// -- end code under test --

Hope this helps!