Parametric test with generic methods

Question

In NUnit 2.5 you can do this:

[TestCase(1,5,7)]
public void TestRowTest(int i, int j, int k)
{
  Assert.AreEqual(13, i+j+k);
}

You can do parametric test.

But I wonder whether you can do this or not, parametric test with generic test method? I.e.:

[TestCase <int>("Message")]
public void TestRowTestGeneric<T>(string msg)
{
  Assert.AreEqual(5, ConvertStrToGenericParameter<T>(msg));
}

Or something similar.

Answer 1

You can make custom GenericTestCaseAttribute

    [Test]
    [GenericTestCase(typeof(MyClass) ,"Some response", TestName = "Test1")]
    [GenericTestCase(typeof(MyClass1) ,"Some response", TestName = "Test2")]
    public void MapWithInitTest<T>(string expectedResponse)
    {
        // Arrange

        // Act
        var response = MyClassUnderTest.MyMethod<T>();

        // Assert
        Assert.AreEqual(expectedResponse, response);
    }

Here is implementation of GenericTestCaseAttribute

[AttributeUsage(AttributeTargets.Method, AllowMultiple = true)]
public class GenericTestCaseAttribute : TestCaseAttribute, ITestBuilder
{
    private readonly Type _type;
    public GenericTestCaseAttribute(Type type, params object[] arguments) : base(arguments)
    {
        _type = type;
    }

    IEnumerable<TestMethod> ITestBuilder.BuildFrom(IMethodInfo method, Test suite)
    {
        if (method.IsGenericMethodDefinition && _type != null)
        {
            var gm = method.MakeGenericMethod(_type);
            return BuildFrom(gm, suite);
        }
        return BuildFrom(method, suite);
    }
}

Answer 2

Create a private method and call that:

    [Test]
    public void TypeATest()
    {
        MyTest<TypeA>();
    }

    [Test]
    public void TypeBTest()
    {
        MyTest<TypeB>();
    }

    private void MyTest<T>()
    {
        // do test.
    }