Unable to retrieve test parameters from parameterized xunit tests

[NikolayPianikov]

xunit works correctly when the test parameter has a primitive type - string, int, etc. These parameters are displayed in the displayName attribute:

[Theory]
    [MemberData(nameof(GetParameters1))]
    public void Parametrized1(string param1, int param2)
    {
    }

    public static IEnumerable<object[]> GetParameters1()
    {
        for (var i = 0; i < 1; i++)
        {
            yield return new object[]
            {
                $"Abc {i}",
                i
            };
        }
    }

If at least one of the attributes is not of primitive type, all parameters disappear from displayName:

[Theory]
    [MemberData(nameof(GetParameters2))]
    public void Parametrized2(string param1, int param2, IReadOnlyCollection<Data2> param3)
    {
    }

    public static IEnumerable<object[]> GetParameters2()
    {
        for (var i = 0; i < 1; i++)
        {
            yield return new object[]
            {
                $"Abc {i}",
                i,
                ImmutableArray.Create(
                    new Data2("str 1", 33),
                    new Data2("str 2", 99))
            };
        }
    }

    public record Data2(string StrVal, double DoubleVal);

It would be useful to add a resultDisplayName attribute that contains the correct value - with all parameters. For example, this is necessary for correct generation of allure test reports

[flakey-bit]

This also means the test counts are wrong in some cases.

If you want to fix test counts once and for all, surely it should be tied to the test ID rather than tricks with the display name