Mocking complex objects like selenium webdriver with Moq

Question

I'm trying to Mock the selenium web driver. I use the following code:

    public  IWebDriver GetMockDriver()
    {
        this.Mock = new Mock<IWebDriver>();
        return (IWebDriver)this.Mock.Object;            
    }

If I'm just accessing driver properties, everything is fine, but when I try to access an object that is part of Driver, eg:

             driver.Manage().Window.Maximize();

I get back a System.NullReferenceException.

I don't really want/need to track calls that were made to the Mock object, it's more that I want something that implements iWebDriver so I can write my selenium tests using TDD and not having to actually create an instance of a real web driver each time.

Answer 1

You have to define an implementation on your mock if you want to call a specific member

this.Mock.Setup(x => x.SomeMethod()).Returns(someObject);

Try some variation on the above. Otherwise your mocked methods will return the defualt data type for the member (probably null)