v2 v3 AOT   Error

xUnit1057

"Type must be public or internal"

Cause

A violation of this rule occurs when a type used by code generation is not visible to the generated code.

Reason for rule

There are situations the user defined code can be compiled, but generated code needs access to a type which is not reachable due to its declared visibility. This most commonly occurs with references to private nested types.

This rule applies to types derived from BeforeAfterTestAttribute, types used in the SkipExceptions list of a test method, types used as collection and/or class fixtures, and types used in [MemberData(MemberType = typeof(...))].

This rule only applies when using xUnit.net v3 in Native AOT mode. When using xUnit.net v2 or v3 in reflection mode, private types are permitted in these scenarios.

How to fix violations

To fix a violation of this rule, declare the type as either public or internal.

Examples

Violates

using Xunit;
using Xunit.v3;

public class xUnit1057
{
    [Fact, MyBeforeAfter]
    public void TestMethod() { }

    class MyBeforeAfter : BeforeAfterTestAttribute { }
}

Does not violate

using Xunit;
using Xunit.v3;

public class xUnit1057
{
    [Fact, MyBeforeAfter]
    public void TestMethod() { }

    internal class MyBeforeAfter : BeforeAfterTestAttribute { }
}