Question

I’m getting error C3095: 'Xunit::Extensions::InlineDataAttribute': attribute cannot be repeated in C++/CLI code but not C#.

xUnit.net looks like the answer to my prayers – a modern unit test framework with GUI working with C++/CLI. However, using their approach to parameterised testing gives me the error C3095 as shown below.

Any ideas?

I’m using the latest xUnit.net 1.6 with Visual Studio 2008SP1.

using namespace Xunit;
using namespace Xunit::Extensions;

public ref class ParameterisedTestClass
{
public:

    [Theory]
    [InlineData("Kilroy", 6)]
    // uncomment to cause c3095 [InlineData("Jones", 5)]
    void PropTest(String^ msg, int msgLen)
    {
        Assert::Equal(msg->Length, msgLen);
    }
};

the equivalent in C# is fine

using Xunit;
using Xunit.Extensions;

public  class ParameterisedTestClass
{

    [Theory]
    [InlineData("Kilroy", 6)]
    [InlineData("Jones", 5)]
    public void PropTest(String msg, int msgLen)
    {
        Assert.Equal(msg.Length, msgLen);
    }
};

Answer 1

Hmmm… I looked at the defs here and here, and reproduced them (cut-down) below; the inheritance of AllowMultiple via DataAttribute works fine in C#:

class Test
{
    [InlineData]
    [InlineData]
    static void Main() { }
}

[AttributeUsage(AttributeTargets.Method, AllowMultiple = true, Inherited = true)]
class DataAttribute : Attribute {}

class InlineDataAttribute : DataAttribute { }

So if it isn’t working for C++/CLI, I guess C++/CLI simply isn’t processing the implied [AttributeUsage]. You should file a request against Xunit asking them to make the [AttributeUsage] explicit on InlineDataAttribute.