Here's a preview of a new fixture that will be available in the next release of MbUnit. The fixtures loads XML data from files and feeds it to the different methods, hence it's Data Driven Unit Testing. I'll make a real article on this when the fixture stabilizes but here's a first example.

[DataFixture]
[XmlDataProvider("../../sample.xml","//User")]
[XmlDataProvider("../../sample.xml","DataFixture/Customers")]
public class DataDrivenTests
{
    [ForEachTest("//User")]
    public void ForEachTest(XmlNode node)
    {
        Assert.IsNotNull(node);
        Assert.AreEqual("User",node.Name);
        Console.WriteLine(node.OuterXml);
    }

    [ForEachTest("//User",DataType = typeof(User))]
    public void ForEachTestWithSerialization(User user)
    {
        Assert.IsNotNull(user);
        Console.WriteLine(user.ToString());
    }
}

The file sample.xml looks like this:

<DataFixture>
  <Employees>
    <User Name="Mickey" LastName="Mouse" />
  </Employees>
  <Customers>
    <User Name="Jonathan" LastName="de Halleux" />
    <User Name="Voldo" LastName="Unkown" />
  </Customers>
</DataFixture>

and the User class like this:

[XmlRoot("User")]
public class User
{
    private string name;
    private string lastName;
    public User()
    {}
    [XmlAttribute("Name")]
    public String Name
    {
    get{ return this.name;}
    set{ this.name = value;}
    }
    [XmlAttribute("LastName")]
    public String LastName
    {
    get{ return this.lastName;}
    set{ this.lastName = value;}
    }
}

How does it work ?

• The XmlDataProvider attributes are used to specify an XML filename that contains the data (of course, you can put several of those).
• Then a first XPath expression is applied to the data.
• Each selected node is then feeded to the ForEachTest which applies a second XPath expression on the node. This allows a fine grained selection of the data.
• You can also specify the desired output data type. XmlSerializer is then used to convert XmlNode into the desired object.

Screenshot

Here's a screenshot that shows have MbUnit loads the XML and creates the different test case.