How to set up a method twice for different parameters with Moq

Question

I would like to set up a method with Moq twice but it seems that the last one overrides the previous ones. Here\'s my initial setup:

string username = \"foo\";
s         


        

Answer 1

Another out-of-the-box option is to use the Return<> version to return different ValidUserContexts depending upon the parameters. It is not better than the above answer, just another option.

We set up ValidateUser() to return the result of a function GetUserContext(string, string), passing in the username and password with which ValidateUser() was called.

[TestClass]
public class MultipleReturnValues {

    public class ValidUserContext {
        public string Principal { get; set; }
    }

    public interface IMembershipService {
        ValidUserContext ValidateUser(string name, string password);
    }

    [TestMethod]
    public void DifferentPricipals() {

        var mock = new Mock();
        mock.Setup(mk => mk.ValidateUser(It.IsAny(), It.IsAny())).Returns(GetUserContext);

        var validUserContext = mock.Object.ValidateUser("abc", "cde");

        Assert.IsNull(validUserContext.Principal);


        validUserContext = mock.Object.ValidateUser("foo", "bar");

        Assert.AreEqual(sPrincipal, validUserContext.Principal);


    }

    private static string sPrincipal = "A Principal";
    private static ValidUserContext GetUserContext(string name, string password) {

        var ret = new ValidUserContext();

        if (name == "foo" && password == "bar") {
            ret = new ValidUserContext { Principal = sPrincipal };
        }
        return ret;

    }
}