Question

I have a function which uses out parameters. How can I mock this function?

My function is:

GetProperties(out string name, out string path, out string extension);

In my original code, I am doing this:

string Name;
string Path;
string Extension;
MyObject.GetProperties(out Name, out Path, out Extension);

Now, how I can mock this?

Answer 1

You should assign out variable’s value before calling the method like this:

string Name = "name";
string Path = "path";
string Extension = "extension";
mock.Setup(item => item.GetProperties(out Name, out Path, out Extension))
    .Returns(someReturnValue);

Although I would prefer returning these values in your return type, instead of using so many out parameters.