Moq Example using out and ref needed.

Question

Hi, I am trying to build a test against some legacy method that implement out parameters. Could you give me an example how to do this?

Very grateful

Answer 1

Just assign the out or ref parameter from the test.

Given this interface:

public interface ILegacy
{
    bool Foo(out string bar);
}

You can write a test like this:

[TestMethod]
public void Test13()
{
    string bar = "ploeh";

    var legacyStub = new Mock<ILegacy>();
    legacyStub.Setup(l => l.Foo(out bar))
        .Returns(true);

    Assert.IsTrue(legacyStub.Object.Foo(out bar));
    Assert.AreEqual("ploeh", bar);
}

Answer 2

Anything wrong with the second example at the top of http://code.google.com/p/moq/wiki/QuickStart ? You really should be giving examples of what you're trying to do if you're not going to look for things like this.