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Unit Testing WIF’s ClaimsPrincipalPermission.CheckAccess

04 May

WIF 4.5 has ClaimsPrincipalPermission.CheckAccess method, very useful to check user’s authorization. You can use this as method call or attribute.

// Imperative method call
using System.IdentityModel.Services;
public ActionResult Index()
{
    ClaimsPrincipalPermission.CheckAccess("foo", "bar");

    return View();
}

// Attribute
[ClaimsPrincipalPermission(SecurityAction.Demand, Operation="foo", Resource="bar")]
public ActionResult ViewFoobar()
{
    return View();
}

Either way, how do we unit test this? My approach is to first abstract out ClaimsPrincipalPermission and create a new wrapper class that will be injected to the dependent class.

Abstract Out

using System.IdentityModel.Services;

public class ClaimsPrincipalWrapper : IClaimsPrincipalWrapper
{
    public void CheckAccess(string resource, string action)
    {
        ClaimsPrincipalPermission.CheckAccess(resource, action);
    }
}

Dependency Injection

using System.IdentityModel.Services;

public class HomeController : Controller
{
    private readonly IClaimsPrincipalWrapper _ClaimsPrincipalWrapper;

    public HomeController(IClaimsPrincipalWrapper claimsPrincipalWrapper)
    {
        _ClaimsPrincipalWrapper = claimsPrincipalWrapper;
    }

    public ActionResult Index()
    {
        _ClaimsPrincipalWrapper.CheckAccess("foo", "bar");

        return View();
    }
}

Unit Test

[TestMethod]
public void TestIndex()
{
    // Arrange
    var _claimsPrincipal = new Mock<IClaimsPrincipalWrapper>();
    _claimsPrincipal.Setup(m => m.CheckAccess(It.IsAny<string>, It.IsAny<string>));
    var _controller = new HomeController(_claimsPrincipalMock.Object);

    // Act
    var _result = _controller.Index() as ViewResult;

    // Assert
    Assert.IsTrue(_result.View != null);
}
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Posted by on May 4, 2015 in General

 

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