Unit Testing Web Services - HttpContext

Question

I want to write unit tests for a web service. I create my test project, reference my web project (not service reference, assembly reference), then write some code to test the we

Answer 1

Here is a related discussion.

I stopped referencing HttpContext.Current directly. and use this class instead:

public class HttpContextFactory
{
    private static HttpContextBase m_context;
    public static HttpContextBase Current
    {
        get
        {
            if (m_context != null)
                return m_context;

            if (HttpContext.Current == null)
                throw new InvalidOperationException("HttpContext not available");

            return new HttpContextWrapper(HttpContext.Current);
        }
    }

    public static void SetCurrentContext(HttpContextBase context)
    {
        m_context = context;
    }
}

and use HttpContextFactory.Current instead of HttpContext.Current in our code.

Then you write this in your test:

        HttpContextFactory.SetCurrentContext(GetMockedHttpContext());

where GetMockedHttpContext() is from here and looks like this:

    private System.Web.HttpContextBase GetMockedHttpContext()
    {
        var context = new Mock();
        var request = new Mock();
        var response = new Mock();
        var session = new Mock();
        var server = new Mock();
        var user = new Mock();     
        var identity = new Mock();

        context.Setup(ctx => ctx.Request).Returns(request.Object);
        context.Setup(ctx => ctx.Response).Returns(response.Object);
        context.Setup(ctx => ctx.Session).Returns(session.Object);
        context.Setup(ctx => ctx.Server).Returns(server.Object);
        context.Setup(ctx => ctx.User).Returns(user.Object);
        user.Setup(x => x.Identity).Returns(identity.Object);
        identity.Setup(id => id.IsAuthenticated).Returns(true);
        identity.Setup(id => id.Name).Returns("test");

        return context.Object;
    }

It uses a mocking framework called moq

In your test project you have to add a reference to System.Web and System.Web.Abstractions, where HttpContextBase is defined.