How to unit test ViewComponent.Invoke()?

Question

In ViewComponent object, HttpContext and User are read-only properties.

How to unit test such a component?

I\'m using

Answer 1

Here is just a samle for async,

    [TestMethod]
        public async System.Threading.Tasks.Task InvokeAsyncNameAsync()
{
# setup mocks
...
var httpContext = new DefaultHttpContext();
            var viewContext = new ViewContext();
            viewContext.HttpContext = httpContext;
            var viewComponentContext = new ViewComponentContext();
            viewComponentContext.ViewContext = viewContext;

            var footerComponent = CreateComponentInstance();
            footerComponent.ViewComponentContext = viewComponentContext;

            ViewViewComponentResult result = await footerComponent.InvokeAsync() as ViewViewComponentResult;
            FooterModel resultModel = (FooterModel)result.ViewData.Model;

....
# do your asserts verifications

            Assert.AreEqual(expectedTest, resultModel.FooterText);
}