Mock GetExternalLoginInfoAsync() method

Question

I have private property to access AuthenticationManager:

private IAuthenticationManager AuthenticationManager => HttpContext.GetOwinContext().Authentication;

I want to mock the method GetExternalLoginInfoAsync() in order to receive fake ExternalLoginInfo object:

ExternalLoginInfo loginInfo = await AuthenticationManager.GetExternalLoginInfoAsync();

Both GetOwinContext() and GetExternalLoginInfoAsync() methods are extension methods. Is it possible to see source code of these methods to see how they works?

Answer 1

Both GetOwinContext() and GetExternalLoginInfoAsync() methods are extension methods. Is it possible to see source code of these methods to see how they works?

Sure, one way is to use ILSpy. For example:

/// <summary>
///     Extracts login info out of an external identity
/// </summary>
/// <param name="manager"></param>
/// <returns></returns>
public static async Task<ExternalLoginInfo> GetExternalLoginInfoAsync(this IAuthenticationManager manager)
{
    if (manager == null)
    {
        throw new ArgumentNullException("manager");
    }
    return AuthenticationManagerExtensions.GetExternalLoginInfo(await TaskExtensions.WithCurrentCulture<AuthenticateResult>(manager.AuthenticateAsync("ExternalCookie")));
}

However, in my opinion this is just a Rabbit hole. Instead, you should be using Dependency Injection to inject a IAuthenticationManager into your controller. Then you can simply Mock it and the methods you need instead of testing internal microsoft code.