How can I mock ServiceStack IHttpRequest - unit-testing

Question

I'm trying to get a unit test working for a service that is injecting items into the IHttpRequest.Items, using a request filter:
this.RequestFilters.Add((req, res, dto) =>
{
// simplified for readability...
var repo = container.Resolve<IClientRepository>();
var apiKey = req.Headers["ApiKey"];
// lookup account code from api key
var accountcode = repo.GetByApiKey(apiKey);
req.Items.Add("AccountCode", accountCode);
});
My service uses that dictionary item:
public class UserService : AppServiceBase
{
public IUserServiceGateway UserServiceGateway { get; set; }
public object Any(UserRequest request)
{
var accountCode = base.Request.Items["AccountCode"].ToString();
var user = UserServiceGateway.GetUserByUsername(request.Name);
return new UserResponse { User = user };
}
}
My test needs be somehow to mock the request, and insert that account code item:
[Test]
public void ValidUsernameReturnUser()
{
// arrange
var gateway = new Mock<IUserServiceGateway>();
gateway.Setup(s => s.GetUserByUsername(It.IsAny<string>()))
.Returns(new UserAccountDTO { Forename = "John", Surname = "Doe" });
var service = new UserService {
UserServiceGateway = gateway.Object,
RequestContext = new MockRequestContext(),
//Request = has no setter
};
// request is this case is null
base.Request.Items.Add("AccountCode", "DEF456");
// act
var response = (UserResponse)service.Any(new UserRequest { Name = "test" });
// assert
Assert.That(response.Result, Is.Not.Null);
}
The service itself accepts a mocked RequestContext, but not a Request. The test therefore fails. Is there a better way to do this?

Answer 1

I think this should do it.
[Test]
public void ValidUsernameReturnUser()
{
// arrange
var mockRequestContext = new MockRequestContext();
//add items to Request
mockRequestContext.Get<IHttpRequest>().Items.Add("AccountCode", "DEF456");
var gateway = new Mock<IUserServiceGateway>();
gateway.Setup(s => s.GetUserByUsername(It.IsAny<string>()))
.Returns(new UserAccountDTO { Forename = "John", Surname = "Doe" });
var service = new UserService {
UserServiceGateway = gateway.Object,
RequestContext = new MockRequestContext(),
};
// act
var response = (UserResponse)service.Any(new UserRequest { Name = "test" });
// assert
Assert.That(response.Result, Is.Not.Null);
}