Not all tests are run in parameterised NUnit TestFixture containing arrays

Question

I have a test class as follows:

[TestFixture("someurl1", new[] { "param1", "param2" }, 15)]
[TestFixture("someurl2", new[] { "param3" }, 15)]
public class my_test
{
    public my_test(string url, string[] fields, int someVal)
    {
        // test setup
    }
}

When running this test in ReSharper 6.1 and NUnit 2.5.10, the test is not run twice, as expected, it only runs once. In the test results I see listed

my_test("someurl1", System.String[], 15)

This makes me think that the two fixtures are being treated as the same, and that NUnit isn't differentiating between the string arrays in the two tests.

As a workaround I have added a dummy parameter in the constructor. If I set this to a different value for each fixture, then all the tests run.

Is it not possible to have TestFixtures with arrays containing different values? I've just upgraded from ReSharper 5 so I'm wondering if that is related. I have read about some issues with parameterised tests in 6.x.

Answer 1

[TestFixture("someurl1", "param1|param2", 15)]
[TestFixture("someurl2", "param3", 15)]
public class my_test
{
    private string[] _fields;

    public my_test(string url, string fieldList, int someVal)
    {
        _fields = fieldList.Split('|');
        // test setup
    }

    [Test]
    public void listFields()
    {
        foreach (var field in _fields)
        {
            Console.WriteLine(field);
        }
    }
}