xUnit and Watin cleanup

Question

I have some test cases using xUnit and Watin. To make all Facts in the class share the same instance of IE, I had created a singleton class so the first test will launch a new IE instance, and the following tests will use the same instance.

After all Facts finish, the IE instance is still running. I just wonder how to close IE after all tests in the class finish.

Answer 1

For this purpose your class with tests need to implement IUserFixture<T> interface.
I'll provide the example which solves your needs and demonstrates xunit life-cycle model:

public class MyTestClass : IUseFixture<WatinFixture>, IDisposable
{
    private WatinFixture _data;

    public void SetFixture(WatinFixture data)
    {
        _data = data;
        Console.WriteLine("setting data for test");
    }

    public MyTestClass()
    {
        Console.WriteLine("in constructor of MyTestClass");
    }

    [Fact]
    public void Fact1()
    {
        Console.WriteLine("in fact1. IE is '{0}'", _data.ReferenceToIE);
        // use _data.ReferenceToIE here
    }

    [Fact]
    public void Fact2()
    {
        Console.WriteLine("in fact2. IE is '{0}'", _data.ReferenceToIE);
        // use _data.ReferenceToIE here
    }

    public void Dispose()
    {
        Console.WriteLine("in Dispose of MyTestClass");
    }
}

public class WatinFixture : IDisposable
{
    public string ReferenceToIE = null;

    public WatinFixture()
    {
        // start IE here
        Console.WriteLine("Starting IE ...");
        ReferenceToIE = "If you see this string - then browser reference is not empty.";
    }

    public void Dispose()
    {
        // close IE here
        Console.WriteLine("Closing IE ...");
        ReferenceToIE = null;
        }
    }

Output:

Starting IE ...
in constructor of MyTestClass
setting data for test
in fact1. IE is 'If you see this string - then browser reference is not empty.'
in Dispose of MyTestClass
in constructor of MyTestClass
setting data for test
in fact2. IE is 'If you see this string - then browser reference is not empty.'
in Dispose of MyTestClass
Closing IE ...