How to Unit Test HtmlHelper with Moq?

Question

Could somebody show me how you would go about creating a mock HTML Helper with Moq?

This article has a link to an article claiming to describe this, but following the li

Answer 1

In MVC5, the ViewContext has an extra constructor parameter for a TextWriter, so Thomas' code no longer works. I added an in-memory TextWriter to get around this problem:

public static HtmlHelper CreateHtmlHelper(ViewDataDictionary vd)
{
    Mock mockViewContext = new Mock(
        new ControllerContext(
            new Mock().Object,
            new RouteData(),
            new Mock().Object
        ),
        new Mock().Object,
        vd,
        new TempDataDictionary(),
        new StreamWriter(new MemoryStream())
    );

    Mock mockDataContainer = new Mock();
    mockDataContainer.Setup(c => c.ViewData).Returns(vd);

    return new HtmlHelper(mockViewContext.Object, mockDataContainer.Object);
}